Refrigeration and drying of liquid ring vacuum pump

With the continuous acceleration of economic development, the application of liquid ring vacuum pump in production and life has become more and more widespread, from being initially used as self-suction pump, and gradually developed to be used in many industrial sectors such as petroleum, machinery, chemical industry, mining, medicine, light industry and food. Here we mainly talk about the application of water ring vacuum pump in refrigeration and drying.

Speaking of freeze-drying, you may first think of food, such as condiments, fruits, of course, there are seafood freezing, this technology is basically to use the special advantages of water ring vacuum pump, change the characteristics of food itself, after vacuum drying to retain the nutrition of food, in order to facilitate transportation and other forms of market sales.

Because in a long time, for food, especially seafood processing, most of the manual operation, but also depends on the seasonal changes, the efficiency is very low, but the use of water ring vacuum pump technology, not only the production efficiency has increased many times, but also the quality of production has been guaranteed.

This freeze-drying technology of water ring vacuum pump is not only applied to food processing, but also to some vaccines and medicines produced by pharmaceutical factories. It is also used to preserve organisms in the medical industry, which achieves very good results and has become a more practical vacuum equipment in recent years. This process is to freeze the material before vacuum, when the material has been frozen into ice water sublimation after removal, so the freeze-dried material will remain in its original state. This technology has been developed in China for decades, and its design is quite mature, which has made great contributions to many industries.

In fact, the application of water ring vacuum pump in refrigeration and drying is very extensive. It has been applied in all walks of life and has a very broad prospect.

Blower-Vacuum-Pump-for-Food-and-Beverage

Industrial-Single-Stage-Rotary-Vane-High-Vacuum-Pump

Stainless-Steel-Food-Single-Stage-vacuum-Pump

Water-Ring-Vacuum-Pump-with-Cast-Iron-Materials

A strong analysis of the jaw crusher of yunnan gravel production

Yunnan gravel production strong jaw crusher, crusher customer is producing field we see jaw crusher equipment, crusher equipment, its characteristics into big, small, all kinds of ores the material can be broken, save energy and environment protection, technology said through setting the size of the discharge freely adjust, can also change the broken ratio, improve the work efficiency. vacuum furnaces

The jaw crusher is allowed to operate under high pressure and on the other hand components of its components.vacuum furnace

Jaw crusher broken mobile jaw, jaw and eccentric shaft use high manganese steel material, which makes jaw crusher has a good stability, the jaw crusher operation is very simple, special the discharging mouth of jaw crusher can perfectly into the various crushing process, and the operation simple and quick, jaw crusher design fully consider the installation problem, easy to transport and install.Pro uction machines mini in uction furnace

Granite-making machine

Granite, is the most common in the crust deep diagenesis, rich in quartz and feldspar in the coarse grain or grain of intrusive rocks, is currently in the stone production line is used as a relatively high quality stone material of artificial sand processing stone, China has a wide range of USES in multiple industries, mining using granite industry has become the most popular investment prospect.vacuum furnaces


There are three stages of granite crushing, the coarse breaking stage, the grinding stage and the sand making stage. In the rough-breaking stage, it is recommended that you use the jaw crusher and the European jaw crusher. vacuum furnace

In the fine phase, the typical use is the counter crusher, cone crusher; In the final stage of sand production, it is generally chosen for the user to choose the reversible sand making machine.small sap copper smelting furnace

Small metal crusher industry leader

The rise of metal crusher, for a time for the iron and steel smelting industry made an indelible contribution. Nearly four or five years all over the metal scraper venture blowing the climax. For those who have not set foot in the business of metal crusher, small metal crusher investment will undoubtedly be the best investment project.
vacuum furnace
The reason is summarized as:
The rise of metal crusher, for a time for the iron and steel smelting industry made an indelible contribution. Nearly four or five years all over the metal scraper venture blowing the climax. For those who have not set foot in the business of metal crusher, small metal crusher investment will undoubtedly be the best investment project.
vacuum furnaces
The reason is summarized as:
1, small metal crusher models, relatively speaking, low prices, users do not have to worry too much about investment income does not return.
2, for the start of the business, you can try to invest in small metal crusher according to the same industry experience to expand sales.
3, small metal crusher in terms of investment, or area and personnel operations are the ideal start-up project.IGBT horizontal vacum in uction heating sintering furnace

How important is the rational layout of the stone production line

The system of stone production line consists of three main parts, first, feeding system. Feeding system is one of the most basic system, the system is mainly for each section of the transport materials, equipment and screening machine, of course, this process is according to the crushing screening process structures are different, how many there will be some different details. The equipment of feeding system mainly has vibration feeding machine, and other feeding equipment, the normal stone material production line is the feeding system responsible for the supply of various stone materials.vacuum nitri ing furnace for tools in ustry

Second, broken systems. It is understood that the broken system is the heart of the stone production line, which can be seen, the importance of this system. The system equipment, the main work is to keep raw material crushing all kinds of ores, the end result of a broken particles required to achieve the finished product, at present, the main equipment of the system is more crusher, and mechanical properties of each crusher, can complete all kinds of stone crushing work together, to ensure normal operation of stone production line can be.Heat Treatment Vacuum Sintering Atmosphere Furnace with low

Thirdly, screening and delivery system. After the main equipment of the system is to put the broken ore better screening, we have learned, sand and stone need to be separated, and classification, application is to transport to the various sites. Sieving conveyor system is the main equipment of linear vibrating screen and other screening equipment, each kind of screening system has its own characteristics and advantages, in the process of work, all screening equipment is required to work together, so that can achieve efficient work, at the same time, the effect of screening reached a more ideal result.Mol enum heater iel furnace machine part

Plastic crusher has brought great benefits to customers

  Main material is polyethylene plastic bottles of waste, plastic is close to our life, we can see traces of plastic in any place, the use of the modern plastic is far beyond the metal and wood use, consumption and far beyond the other materials. Because of polyethylene under natural conditions are difficult to oxidation, and the combustion will produce a lot of gas that is harmful to the body and material, so the environmental pollution is very serious, the famous white pollution is caused by the plastic. vacuum furnaces

  Black tea and green tea, etc are very high quality made of polyethylene plastic, it has a very high recycling value, if discarded directly not only has a lot of pollution to the environment, the data is also a kind of very unnecessary waste. For black tea bottles, green tea bottles, and so on, we can take some measures to make these materials more usable.operate latest promotion annealing sintering furnace

Plastic shredding machine can be torn for a variety of materials processing, black tea, green tea can be by shredding machine processing, such as the bottled again the use of resources, the same a bottle of black tea, if direct discard worthless, if be used to recycle again, can get very good collection, and the environmental protection also play a very important role. It is the value of these reusable garbage that can be used again by shredding machine.High vacuum gas atmosphere sintering muffle Furnace

The cause of the vacuum furnace graphite electrode loss analysis and derogation measures

The cause of the vacuum furnace graphite electrode loss analysis and derogation measures

The service life of graphite electrode in a certain extent determines the production capacity of the hard zinc vacuum distillation furnace and the production cost, the article the cause of the vacuum furnace using graphite electrode loss is analyzed, combining with production practice, put forward the measures to reduce the loss of graphite electrode, received good results.
A domestic processing hard zinc smelter adopts horizontal vacuum furnace, recovery of indium, germanium, zinc and other valuable metals, muffle furnace with original treatment technique - compared to the electric furnace process, the recovery of valuable metals, security, environmental protection and other indicators have greatly improved, created a considerable economic and social benefits. Hard zinc vacuum distillation furnace with graphite electrode as a heating element, converts electrical energy into heat energy, is crucial parts in the vacuum distillation furnace, to some extent, it determines the work ability of the vacuum furnace. In the production of vacuum distillation furnace processing hard zinc process, although the graphite electrode is easy to consume parts, but if its service life is too short, frequent replacing electrode, not only increase the workload of maintenance and the production cost, and the serious influence production furnace smooth continuation of time, thereby significantly reducing the hard zinc processing. So the analysis of the factors affecting the service life of graphite electrode, and find out effective countermeasures, improve the service life of the electrode, to ensure production run smoothly, improve the hard zinc processing and reduce the production cost is of great significance.

The influencing factors of vacuum furnace temperature to transfer

The influencing factors of vacuum furnace temperature to transfer

1, the strength of the vacuum furnace heating element, in the design, mainly in the form of heat. Internal heat source heating, temperature, from inside to outside, the strength size directly affect the temperature distribution in the furnace. When the inner court, the higher, the higher the temperature of the a fixed-point, at the same time must be the bigger the temperature difference distribution area. So, in the actual production process, can control the surface of the furnace core through the load or furnace core power control furnace temperature distribution.
2, reaction material from the core of distance, when furnace core power must have, namely the strength of the internal heating element must have, the farther distance furnace core of reaction, the lower the temperature, may not be able to achieve the required temperature reaction, the closer distance furnace core, the higher the temperature, the reaction.
3, burden the better performance of radiator cooling performance of the furnace charge, internal heat loss, the faster the outward heat loss in the reaction of material very easily, cause a fixed temperature decrease. But if the cooling performance of the reaction is not good, is needed for the convergence of heat, allows heat to pass time lengthen, conducive to the material to absorb heat and reaction, raise the temperature of a fixed point. Reaction under the condition of high vacuum (pa) 4 ~ 13, reaction temperature 1200 ℃, temperature of furnace core will soon be able to achieve the required value, so the reaction time of depending on the thickness of the material, the reaction furnace core periphery thought furnace insulation layer in the distance. Can through the design of furnace size control power supply time.

The influencing factors of vacuum furnace temperature to transfer the three main factors

The influencing factors of vacuum furnace temperature to transfer the three main factors

According to the temperature field distribution equations, the internal heating type vacuum furnaces the whole temperature field distribution, mainly depends on several aspects of constraints. Namely material average coefficient of thermal conductivity, the average density of P and q on average than hot melt c.. Factors that influence the vacuum furnace temperature to transfer includes the following three points:
1: the strength of the furnace heating element, in the design, mainly in the form of inner heat source. Internal heat source heating, temperature, from inside to outside. The strength of size directly affect the temperature distribution in the furnace. By (5) it can be seen that when the higher the heat inside roar, a fixed point of the higher the temperature, at the same time a certain temperature difference (delta T) of (r), the greater the distribution area. So, in the actual production process, can control the surface of the furnace core through the load or furnace core power control furnace temperature distribution.
2: the response is the distance from the furnace core (delta r), when a certain core power, namely the inner heat source strength must be, the farther distance furnace core of reaction, the lower the temperature, may not be able to reach required temperature reaction. The closer distance furnace core, the higher the temperature, the reaction.
3; Burden of heat dissipation performance, the burden of the heat dissipation performance, the better, the faster the internal heat loss outward, heat loss in the reaction of material very easily, cause a fixed temperature decrease. But if the cooling performance of the reaction is not good, is needed for the convergence of heat, allows heat to pass time lengthen, conducive to the material to absorb heat and reaction, raise the temperature of a fixed point. Should be under the condition of high vacuum (pa) 4 ~ 13, reaction temperature 1200 ℃, the core temperature will soon be able to achieve the required value, so the reaction time of depending on the thickness of the material, namely the reaction furnace core periphery expect furnace insulation distance. Can through the design of furnace size control power supply time.

What are the graphite in the application of vacuum furnace

What are the graphite in the application of vacuum furnace

Normally, the industry could be divided into: graphite vacuum furnace according to the temperature low temperature graphite graphite temperature vacuum in vacuum furnace, furnace, high temperature vacuum furnace.
Low temperature vacuum furnace: working temperature below 1150 ℃ oven; In the vacuum furnace temperature graphite: working temperature at 1150 ℃ to 1600 ℃ oven; High temperature vacuum furnace: working temperature higher than 1600 ℃ oven;
Graphite materials commonly used vacuum furnace heating body features:
Graphite, vacuum is often used to 2200 ℃, 2300 ℃ vacuum significantly increased evaporation, maintain the atmosphere (inert gas) for pressure elements in evaporation is abate, can be used in the 2400 ℃;
Graphite furnace vacuum furnace (heating body, the reflective screen) material:
Gas maintenance or graphite material of vacuum furnace, tungsten, tantalum, graphite usually are three;
Heating graphite, graphite is used in vacuum furnace should be high purity, high strength, such as static pressure molding isotropic three high graphite, otherwise will not be strong high temperature function and electrical function and service life; Domestic graphite vacuum furnace to choose domestic graphite furnace type, more for demand is not high in the low temperature vacuum furnace. Trust, follow the quality improvement of domestic graphite progress, in the high temperature furnace, graphite will be widely used.
Because the vacuum furnace temperature cooling speed is slow, low temperature fast cooling is advocated measures, advance production efficiency. Low temperature fast circulation, circulation outside the furnace can choose furnace, two methods, the cooling gas usually choose an inert gas.

The importance of the theory of vacuum furnace cooling system

The importance of the theory of vacuum furnace cooling system

The vacuum gas quenching furnace with graphite heater heating way, by the body, vacuum system, water system, air system, startup system, electric control management system and so on several parts of structure.
Vacuum furnace in close vacuum heating by electric heating element, and has important effect on the service life of furnace body cooling system. Work condition cooling water channel should be kept unobstructed, avoid water temperature rise the phenomenon of downtime impact production schedule.
If water cooling system disorder, vacuum furnace heating system after long use a contraction harden etc. Phenomenon, serious still can appear short circuit phenomenon, reduce the service life of the furnace body is normal. So attention should be paid to the use of the cooling system maintenance, reduce sediment accumulation in the piping and water jacket, keep the water flow.
Periodically maintenance care, once appear, loss of expensive machines burning phenomenon, also prone to accidents, so the cooling system normal operation of the staff to ignore.

Simple understanding of vacuum brazing furnace

Simple understanding of vacuum brazing furnace

Everyone's understanding of vacuum brazing furnace how many? In order to make people more about the product master, we'll give you a brief introduction of below!
Vacuum brazing furnace is the large-scale equipment, heat treatment can be vacuum brazing, vacuum annealing, vacuum aging and other processing. Programmable multiple different procedures, it can control and into hundreds of heat treatment curve points, six points up, down, left and right sides, front and rear area temperature control, there are more and single point temperature recorder and over temperature protection device, furnace temperature uniformity can be controlled in less than 3 ℃, the other with the installation of high purity nitrogen high flow of strong cold. The equipment has a large amount of furnace charging and high efficiency, have special request for complex parts and parts no need for supplementary processing products.

Use vacuum solidification shell furnace are as follows

Use vacuum solidification shell furnace are as follows

USES: widely used in ceramics, metallurgy, electronics, glass, chemical, mechanical, refractories, the development of new materials, special materials and building materials production and experiment.
Features: open the door way: side open, lock, door can rotate
1, control accuracy: + / - 1 ℃ furnace temperature uniformity: + / - 1 ℃ (according to the size of the heating chamber and decide).
2, easy to operate, programmable, PID self-tuning, automatic heating, automatic heat preservation, cooling, without unattended. Can match with the computer communications through computer operation furnace (launch electric furnace, to stop the electric furnace, suspension temperature and set temperature curve, store temperature curve, history curve, etc.), software free see: computer control system.
3, quick heating (heating rate of 1 ℃ / h to 40 ℃ / min adjustable).
4, energy saving (furnace is made of imported fiber, high temperature resistant, resistant to thermal shock quench)
5, furnace by the delicate coating corrosion resistance to acid and alkali, furnace and furnace isolation used air-cooled furnace wall temperature close to room temperature
6, the double circuit protection (overtemperature and overpressure, superfluid, section I, power outages, etc.)
7, furnace imported refractory materials, heat preservation performance is good, high heat resistance, resistance to thermal shock
8 categories, temperature: 1200 ℃ 1400 ℃, 1600 ℃, 1700 ℃ 180 ℃ o five.

Practical applications of induction furnace

Practical applications of induction furnace

A, induction furnace used for heat treatment: all kinds of metal partial or whole quenching, annealing, tempering, diathermy;
Second, the induction furnace used for thermal type: the whole parts forging, forging, hot upsetting, hot rolling;
Three, induction furnace is used for welding, brazing of various kinds of metal products, all kinds of cutter blades, saw blade welding, steel pipe, copper pipe welding, the same dissimilar metal welding;
Four, induction furnace used for smelting metal: gold, silver, copper, iron, aluminum and other metal (vacuum), smelting, casting molding and evaporation coating;
Five, high-frequency heating machine other applications: semiconductor crystal growth, shrink fit, bottle heat sealing, toothpaste heat sealing, powder coating, metal implants plastic, etc.

Vacuum hot pressing furnace structure description

Vacuum hot pressing furnace structure description                           

Structure Description
1, furnace body : sandwich structure with double water, the inner wall 304 stainless steel polished, high-quality carbon steel outer wall.
2, the furnace lid: the use of double head sandwich structure, the inner wall 304 stainless steel, the outer wall is made of high quality carbon copper welding.
3,the vacuum hot pressureing furnace bottom: the same head with double water sandwich structure, water-cooled stainless steel head, intake valve; adjustable height, displacement sensor and electrode devices. All the inner walls are polished 304 stainless steel.
4, the vacuum furnace rack: upper and lower beams welded together two thick cylindrical columns, the upper and lower walls of the head support are welded products, high strength, high quality finish and balance.
5, the pressure head: the upper and lower pressure head with high purity graphite blocks pressed into production, the pressures 35-70MPa indenter
6, vacuum systems: one set by a mechanical pump, pneumatic valves, air release valve, vacuum valve, vacuum gauge (± Pa) and other components.
7. Hydraulic system: electric input mode, the instrument can be set to automatically adjust the pressure, and can achieve regulation, dwell.
8, the temperature control system: Silicon temperature can be controlled, configured with PID function instrument digital form, with over-temperature audible alarm.
9, cooling system: from a variety of pipeline valves and other related equipment components, with pressure-voltage, water audible alarm and automatic shut-off function.

Rolling bearing steel heat treatment methods

                                    

Rolling bearing steel heat treatment methods

 Heat Treatment generally includes heating, heat preservation, cooling three processes, sometimes only two processes of heating and cooling. The process is convergence with each other and can not be interrupted.
Heating is an important step of heat treatment. There are many ways for rolling steel heat heating process, the first is the use of charcoal and coal as a heat source, and then the application of liquid and gaseous fuels. Application of electric heating is easy to control, and no environmental pollution. With these heat source may be directly heated, can also molten salt or rolling bearing steel, as well as the floating particles indirect heating.
When the rolling bearing steel is heated, the work piece is exposed to the air, often oxidation, decarbonization (ie, reduce the carbon content of the steel parts of the surface), which parts of the surface properties after heat treatment have a very negative impact. Thus the rolling bearing steel should normally be in a controlled atmosphere or protective atmosphere, molten salt and vacuum heating, paint or packaging methods can also be used to protect heating.
The heating temperature is one of the important parameters of the heat treatment process to select and control the heating temperature, the heat treatment is to ensure the quality of the main issues. The heating temperature to be treated with the purpose of rolling bearing steel material and heat treatment vary, but are generally heated to a temperature above the phase transition, in order to obtain tissue needed. Further change will take some time, so when the rolling bearing steel surface to reach the required heating temperature, must at this temperature for a certain time, so that the temperature inside and outside the same, so the micro structure of the transition is completed, this time called the incubation period. When using high energy-density heating and surface heat treatment, heating fast, generally no holding time or the holding time is very short, and the holding time of chemical treatment is often longer.
Also a lack of cooling heat treatment process step is not available, because the process of cooling methods differ, mainly for controlling the cooling rate. General annealing cooling slowest cooling faster normalizing, quenching cooling faster. But also because of different grades have different requirements, such as empty hard steel can be used as cooling rate normalizing hardened.
Rolling steel heat treatment process can be divided into the overall heat treatment, surface heat treatment, local heat treatment and chemical heat treatment. Depending on the heating medium, heating temperature and cooling methods, each category can be divided into a number of different heat treatment process. The same kind of rolling bearing steel with different heat treatment process, available in different organizations, so as to have different properties. Steel is the most widely used industrial rolling bearing steel, and the steel micro structure is also the most complex, and therefore a wide range of steel heat treatment process.
Overall heat treatment of the work piece as a whole is heated and then cooled at a rate appropriate to change the rolling bearing steel heat treatment process its overall mechanical properties. Roughly the overall heat treatment of steel annealing, normalizing, quenching and tempering four basic processes.

Defects of Vacuum heat treatment quenching

                       

Defects of Vacuum heat treatment quenching

Vacuum quenching technology gradually spread, but also began to point out its problems.
First evaporated Cr, Mn and other alloying elements, and from the heat to the surface of abnormal tissue clamp the work piece by the vacuum vapor deposition cr generated. Measures taken in response. Is to reduce the degree of vacuum, the gas is introduced into the furnace control.
Second, the problem of insufficient cooling capacity of SKH51 punch, with pressurized nitrogen cooling 5 ~ 6Bar of, for SKD6l die casting, with 20Bar super pressurized nitrogen cooling, it is close to be resolved.
Third, deformation hardening, vacuum hardening, quenching deformation is its commodity features, but we all know that this is a false consciousness, although small deformation, recently also tended to improve in order to reduce deformation hardening furnace structure.
Fourth, coloring problem, although the work piece can actually use, but reduces the value of goods, an increase from the mold user claims.
Today, there are a lot of the heat treatment plant in the vacuum hardening furnace for heat treating bearing rings, will produce deformation of the work piece, SIMUWU vacuum equipment for everyone to do a simple analysis of the deformation of the products in question, and I hope to help everyone .
The first is the use of vacuum hardening furnace before quenching problem, there may be processed before quenching deformation of the bearing rings formed mainly in the following ways:
(1) Cold rolled bearing steel, hot-rolled bearing steel after annealing of the ball according to the specifications required by the mill, cold-rolled into cold-rolled steel corresponding specifications, and then turning forming, or directly turning cold roll forming steel molding, maybe Ways processed residual stress will be relatively larger, it increases the amount of distortion in the subsequent heat treatment.
(2) forging the way, refers to the cold forging steel ball annealing after the first, and then the cold forging or cold grind, and finally turning forming. This approach may also cause deformation of the work piece prior to hardening heat treatment in a vacuum furnace.
(3) forging the way, refers to the steel first by forging ball annealing, cool before turning forming. The same may cause deformation of the work piece before the vacuum heat treatment.
(4) refers to the hot-rolled steel hot-rolled steel to spheroidizing annealing, and then turning way forming.
For the outer diameter of the bearing rings ≤100mm, the current majority grind with cold forming process. This process is due to the energy-saving, can effectively reduce the cost, it is widely used. But the stress produced by this process is relatively large, to the final heat treatment also brings some difficulties. Thus requiring heat treatment process needs to be more precise, the operation to be more serious, while equipment for the heat treatment (optional SIMUWU vacuum hardening furnace can meet the requirements) are also more demanding, and only then will we be able to achieve the required product technical Claim.

The Future of vacuum carburizing.

   The Future of vacuum carburizing

Aerospace and automotive specifications need to be reviewed in light of rapid developments underway with these new materials. Serious consideration must be given to the use of elevated temperatures above 1900oF (1040oC) for carburizing and direct quenching, to minimize cycle times and reduce carbon absorption without adversely affecting microstructure. Preoxidation treatments have been found to be unnecessary, and rules for the use of high gas pressure quenching need to be better established and realized throughout the industrial sectors. Once this is accomplished, vacuum carburizing technology offers almost limitless possibilities.