A vacuum system for deodorizing grease

Abstract

The utility model belongs to the technical field of oil processing, and specifically relates to a vacuum system for oil deodorization, including a deodorization tower, a condenser group, a Roots vacuum system, a refrigeration cycle system and a deicing system, wherein the refrigeration cycle system includes a freezing liquid storage tank, a refrigeration unit and a circulation cooling tower, wherein the input end of the circulation cooling tower is connected to the water outlet end of the refrigeration unit, the output end of the circulation cooling tower is connected to the water inlet end of the refrigeration unit, the cold inlet end of the refrigeration unit is connected to a refrigeration circulation pump and is connected to the cold outlet end of the freezing liquid storage tank through the refrigeration circulation pump, the cold outlet end of the refrigeration unit is connected to the cold inlet end of the freezing liquid storage tank, and the freezing liquid storage tank is connected to the condenser group. The utility model solves the problem that the refrigeration cycle system is in a full-load operation state for a long time, resulting in an increased failure rate, improves the stability of operation, and achieves the purpose of continuous operation, thereby ensuring the production efficiency of oil processing.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil processing, and in particular relates to a vacuum system for oil deodorization. Background Art

[0002] In the oil processing process, deodorization is an important link, and its purpose is to remove odor and harmful substances in oil. In the deodorization process, a vacuum system is mostly used to reduce the pressure in the deodorization tower, thereby improving the deodorization efficiency. Oil deodorization is mostly carried out under high temperature conditions of 190-250℃, and the oxidative stability of vegetable oil will decrease at high temperature, and the auto-oxidation rate of unsaturated acid will also accelerate. With the extension of high temperature time, oxidative decomposition products gradually accumulate, and indicators such as peroxide, carbonyl value and acid value will increase. During the vacuum deodorization process, the fatty acid molecules in the triglyceride or between multiple triglyceride molecules contained in the vegetable oil will produce thermal polymerization to generate polymers and isomerization reactions. Therefore, improving the deodorization vacuum degree is the key to improving the oxidative stability of polyunsaturated acid oils. However, the deodorization generally uses a chilled water vacuum system, and the deodorization vacuum degree of the chilled water vacuum system can only be stabilized between 200 and 300 Pa, making it difficult to effectively improve the oxidative stability of polyunsaturated acid oils. In addition, the steam consumption of the chilled water vacuum system is large, and the later maintenance cost is also high.

[0003] There are studies on the problems of deodorization using a chilled water vacuum system in the prior art, such as patent applications CN206408196U-dry condensation vacuum system, CN202246615U-grease dry condensation vacuum deodorization system, etc., which use Roots vacuum pump units to improve the vacuum stability of the vacuum system, solving the problem that it is difficult for the current chilled water vacuum system to effectively improve the oxidation stability of polyunsaturated acid oils. However, the existing condensation vacuum system can only guarantee the effect of oil deodorization, but it is difficult to effectively control the stability of the refrigeration unit or device operation. It is very easy to cause the failure rate to increase due to the refrigeration unit or device being in full load operation, and it is impossible to achieve continuous operation, which seriously affects the stability of the oil deodorization freezing vacuum, and then affects the production efficiency of oil processing. To this end, a new technical solution is needed to solve the above technical problems. Utility Model Content

[0004] The purpose of the utility model is to provide a vacuum system for oil deodorization, so as to solve the problems raised in the above-mentioned background technology that the current condensation vacuum system is difficult to effectively control the stability of the operation of the refrigeration unit or device, and is very likely to cause an increase in the failure rate due to the refrigeration unit or device being in full load operation, and cannot achieve continuous operation, which seriously affects the stability of the oil deodorization freezing vacuum and further affects the oil processing production efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a vacuum system for oil deodorization, comprising a deodorization tower, a condenser group connected to the deodorization tower, and a Roots vacuum system, a refrigeration cycle system and a deicing system connected to the condenser group, the refrigeration cycle system comprising a refrigerant storage tank, a refrigeration unit and a circulating cooling tower, the input end of the circulating cooling tower is connected to the water outlet end of the refrigeration unit, the output end of the circulating cooling tower is connected to the water inlet end of the refrigeration unit, the cold inlet end of the refrigeration unit is connected to a refrigeration circulation pump and is connected to the cold outlet end of the refrigerant storage tank through the refrigeration circulation pump, the cold outlet end of the refrigeration unit is connected to the cold inlet end of the refrigerant storage tank, the water inlet end and the water outlet end of the refrigerant storage tank are respectively connected to the return water end and the water inlet end of the condenser group and are coordinated with the Roots vacuum system through the condenser group.

[0006] Furthermore, the water outlet end of the refrigerant liquid storage tank is connected to a refrigerant circulation pump and is connected to the water inlet end of the condenser group through the refrigerant circulation pump; the condenser group includes a condenser A and a condenser B, and the water inlet ends of the condenser A and condenser B each have an inlet valve, and are arranged in parallel through the inlet valves and are alternately connected to the water outlet end of the refrigerant liquid storage tank through the refrigerant circulation pump; the water outlet ends of the condenser A and condenser B each have a return valve, and are arranged in parallel through the return valves and are alternately connected to the water inlet end of the refrigerant liquid storage tank.

[0007] Furthermore, the air inlet ends of the condenser A and condenser B are each connected to an air inlet valve, and are arranged in parallel through the air inlet valve and are alternately connected to the air outlet end of the deodorization tower; the air outlet ends of the condenser A and condenser B are each connected to an air outlet valve, and are arranged in parallel through the air outlet valve, and are alternately connected to the Roots vacuum system; the emptying A ends of the condenser A and condenser B are each connected to a chilled water emptying valve, and are arranged in parallel through the chilled water emptying valve, and are alternately connected to the return water end of the refrigerant storage tank; the emptying B ends of the condenser A and condenser B are each connected to a condensed material emptying valve, and are arranged in parallel through the condensed material emptying valve, and are alternately connected to the deicing system.

[0008] Furthermore, the Roots vacuum system includes a vacuum system A and a vacuum system B, wherein the input ends of the vacuum system A and the vacuum system B are respectively connected to a vacuum inlet valve and are arranged in parallel through the vacuum inlet valves and are alternately connected to the outlet ends of the condenser A and the outlet ends of the condenser B through the outlet valves.

[0009] Furthermore, the vacuum system A and the vacuum system B have the same structure and both include a water ring vacuum pump, a first-stage Roots pump, a second-stage Roots pump and a third-stage Roots pump. The third-stage Roots pump is connected to the second-stage Roots pump, the second-stage Roots pump is connected to the first-stage Roots pump, the first-stage Roots pump is connected to the water ring vacuum pump, and the water ring vacuum pump is alternately connected to the outlet end of condenser A and the outlet end of condenser B through a vacuum inlet valve and an outlet valve.

[0010] Furthermore, the deicing system includes a deicing tank and a steam generator, the output end of the steam generator is connected to a heating steam valve and is connected to the air inlet end of the deicing tank through the heating steam valve, the input end of the deicing tank is alternately connected to the drain B ends of condenser A and condenser B through a condensate drain valve, the deicing ends of condenser A and condenser B are each connected to a deicing valve and are arranged in parallel through the deicing valves and are alternately connected to the output end of the deicing tank at the same time; the output end of the deicing tank is connected to a deicing pump and is alternately connected to the deicing ends of condenser A and condenser B through the deicing pump and the deicing valve, the sewage end of the deicing tank is connected to a sewage pump and is connected to a grease trap through the sewage pump.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model adopts a refrigeration cycle system consisting of a refrigerant storage tank, a refrigeration unit and a circulating cooling tower, so that the refrigerant cycle and the refrigeration cycle are set separately, which effectively avoids the problem that the refrigeration unit refrigerates all the refrigerants, thereby effectively controlling the stability of the refrigeration cycle system operation. By setting the refrigeration circulation pump with a small flow rate, a small part of the refrigerant is sent to the refrigeration unit for refrigeration. By using the heat exchange principle between the refrigerant passing through the refrigeration unit and the refrigerant passing through the condenser group, the temperature in the refrigerant storage tank is always maintained at -28°C, which effectively reduces the refrigerant flow passing through the refrigeration unit, reduces the processing volume of the refrigeration unit, effectively reduces energy consumption, solves the problem that the refrigeration unit is in a full-load operation state for a long time and causes an increase in the failure rate, greatly improves the stability of the refrigeration unit operation, and achieves the purpose of continuous operation, thereby ensuring the production efficiency of oil processing;

[0013] 2. The utility model utilizes the principle of heat exchange to keep the refrigerant in the vacuum system at -28°C, which is beneficial to maintaining the stability of the vacuum system, effectively reducing the activity of gas molecules, reducing the interference with the vacuum degree, and helping to better maintain the vacuum state of the vacuum system, ensuring the smooth progress of the oil deodorization process; it can also enhance the condensation effect of impurities such as gas and moisture in the oil, making it easier to separate and remove them, thereby improving the purity of the oil; it can also well control the temperature of the oil, avoid the problem of oil deterioration or performance change caused by excessive temperature, and ensure the quality and characteristics of the oil; it can also reduce the growth and reproduction of microorganisms, reduce the risk of oil pollution, and improve the level of health and safety, so as to ensure that the vacuum system can operate normally as expected;

[0014] 3. The utility model adopts a vacuum system consisting of a deodorizing tower, a condenser group, a Roots vacuum system, a refrigeration cycle system and a deicing system, so that the deodorizing vacuum degree can be more stable, and the deodorizing vacuum degree can reach below 100 Pa, thereby effectively improving the oxidation stability of polyunsaturated acid oils in oils and fats, and the smoke point can reach above 220°C, and the acid value is extremely low, which effectively inhibits the phenomenon of color reversion and odor reversion, effectively controls the indicators such as 3-MCPDE (trichloropropane ester), GE (glycidyl ester) and trans fatty acids, and also effectively improves the efficiency of economic benefits;

[0015] 4. The utility model sets up the Roots vacuum system and the refrigerant storage tank together through the condenser group, so that the Roots vacuum system can achieve the purpose of oil deodorization by increasing only a small amount of electricity, effectively suppressing the consumption of steam, and the electricity consumed is only 0.2-0.5 degrees per ton of oil more than the original electricity, which greatly reduces energy consumption, reduces the discharge of wastewater and exhaust gas, and is more in line with the development trend of green environmental protection. At the same time, it also effectively reduces the maintenance cost, thereby ensuring the effect and efficiency of oil deodorization, and is suitable for large-scale processing of oil;

[0016] 5. The utility model adopts the setting of alternate use of vacuum system A and vacuum system B, so that the deodorization efficiency of the vacuum system can be maximized, effectively avoiding the problem of failure to complete the vacuum deodorization of grease due to damage of the Roots vacuum system, thereby effectively improving the effect of grease deodorization and ensuring the efficiency of grease deodorization, and is suitable for mass processing of grease;

[0017] 6. The utility model adopts a deicing system consisting of a deicing tank and a steam generator, so that condenser A or condenser B is always in a working state under the action of the deicing system, so that condenser A or condenser B can reach the best processing state, effectively improving the working efficiency of the vacuum system, so that the production of grease can achieve mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the gas trap system;

[0020] Figure 3 for Figure 1 The structural diagram of the refrigeration cycle system;

[0021] Figure 4 for Figure 3 Structural diagram of the refrigerant refrigeration cycle;

[0022] Figure 5 for Figure 1 Schematic diagram of the de-icing system.

[0023] Among them: 1. Deodorization tower; 2. Condenser group; 201. Condenser A; 202. Condenser B; 3. Roots vacuum system; 301. Vacuum system A; 3011. Water ring vacuum pump; 3012. First-stage Roots pump; 3013. Second-stage Roots pump; 3014. Third-stage Roots pump; 302. Vacuum system B; 4. Refrigeration cycle system; 401. Refrigerant storage tank; 402. Refrigeration unit; 403. Circulating cooling tower; 5. Refrigeration circulation pump; 6. Refrigerant circulation pump; 7. Water inlet valve; 8. Return valve; 9. Air inlet valve; 10. Air outlet valve; 11. Vacuum air inlet valve; 12. Chilled water drain valve; 13. Condensate drain valve; 14. Deicing system; 141. Deicing tank; 142. Steam generator; 15. Heating steam valve; 16. Deicing valve; 17. Deicing pump; 18. Sewage pump; 19. Grease trap. DETAILED DESCRIPTION

[0024] The following examples are used to further illustrate the content of the utility model, but do not limit the application of the utility model.

[0025] See also Figure 1-Figure 5A vacuum system for oil deodorization comprises a deodorization tower 1 for oil processing, a condenser group 2 connected to the deodorization tower 1 and used for processing deodorized gas, a roots vacuum system 3 connected to the condenser group 2 and used for providing vacuum, a refrigeration cycle system 4 for circulating and providing refrigerant, and a deicing system 14 for assisting the condenser group 2 in deicing, wherein the refrigeration cycle system 4 comprises a refrigerant storage tank 401 for storing refrigerant (the temperature of the refrigerant storage tank 401 is set to -28°C), a refrigeration unit 402 for refrigerant refrigeration (the temperature of the refrigeration unit 402 is set to -27°C), and a refrigerant circulation system 403 for circulating and cooling the refrigerant. The circulating cooling tower 403 is designed so that the refrigerant circulation and the refrigeration circulation are set separately, which effectively avoids the problem that the refrigeration unit 402 refrigerates all the refrigerants, so that the stability of the operation of the refrigeration cycle system 4 is effectively controlled. The input end of the circulating cooling tower 403 is connected to the water inlet end of the refrigeration unit 402, and the output end of the circulating cooling tower 403 is connected to the water outlet end of the refrigeration unit 402. The cold inlet end of the refrigeration unit 402 is connected to the refrigeration circulation pump 5 and is connected to the cold outlet end of the refrigerant storage tank 401 through the refrigeration circulation pump 5. The small flow rate of the refrigeration circulation pump 5 is used to send a small amount of refrigerant to the refrigeration unit 402 to cool the refrigeration unit 402. The cold outlet of the refrigerating unit 402 is connected to the cold inlet of the refrigerant tank 401, the water inlet of the refrigerant tank 401 is connected to the water return end of the condenser group 2, the water outlet of the refrigerant tank 401 is connected to the refrigerant circulation pump 6 and is connected to the water inlet of the condenser group 2 through the refrigerant circulation pump 6. The heat exchange principle between the refrigerant passing through the refrigerating unit 402 and the refrigerant passing through the condenser group 2 is utilized to keep the temperature in the refrigerant tank 401 at -28°C, which effectively reduces the refrigerant flow passing through the refrigerating unit 402, reduces the processing capacity of the refrigerating unit 402, effectively reduces the energy consumption, and solves the problem of refrigeration. The unit 402 is in a full-load operation state for a long time, which greatly improves the operation stability of the refrigeration unit 402 and realizes the purpose of continuous operation, thereby ensuring the production efficiency of oil processing. The refrigerant storage tank 401 is arranged in conjunction with the Roots vacuum system 3 through the condenser group 2. By adopting a cooling method combining the Roots vacuum system 3 with the refrigeration cycle system 4, not only can the vacuum system not consume a large amount of steam during operation, thereby achieving a significant energy-saving effect, but also the waste heat generated by the vacuum system during the cooling process can be effectively utilized, thereby further reducing energy consumption and carbon emissions.

[0026] See also Figure 1-Figure 5The condenser group 2 includes a condenser A201 and a condenser B202 for alternate use. The water inlet ends of the condensers A201 and B202 are each provided with a water inlet valve 7 and are arranged in parallel through the water inlet valve 7 and are alternately connected with the water outlet end of the refrigerant storage tank 401 through a refrigerant circulation pump 6; the water outlet ends of the condensers A201 and B202 are each provided with a return valve 8 and are arranged in parallel through the return valve 8 and are alternately connected with the water inlet end of the refrigerant storage tank 401;

[0027] The air inlet ends of the condenser A201 and the condenser B202 are each connected to an air inlet valve 9, and are arranged in parallel through the air inlet valve 9 and are alternately connected to the air outlet end of the deodorizing tower 1; the air outlet ends of the condenser A201 and the condenser B202 are each connected to an air outlet valve 10, and are arranged in parallel through the air outlet valve 10 and are alternately connected to the Roots vacuum system 3;

[0028] The Roots vacuum system 3 includes a vacuum system A301 and a vacuum system B302 for alternate use. The input ends of the vacuum system A301 and the vacuum system B302 are arranged in parallel and are each connected with a vacuum air inlet valve 11. The vacuum system A301 is alternately connected with the air outlet end of the condenser A201 and the air outlet end of the condenser B202 through the vacuum air inlet valve 11 and the air outlet valve 10. Similarly, the vacuum system B302 is also alternately connected with the air outlet end of the condenser A201 and the air outlet end of the condenser B202 through the vacuum air inlet valve 11 and the air outlet valve 10.

[0029] The vacuum system A301 and the vacuum system B302 have the same structure and both include a water ring vacuum pump 3011, a first-stage Roots pump 3012, a second-stage Roots pump 3013 and a third-stage Roots pump 3014, the third-stage Roots pump 3014 is connected with the second-stage Roots pump 3013, the second-stage Roots pump 3013 is connected with the first-stage Roots pump 3012, the first-stage Roots pump 3012 is connected with the water ring vacuum pump 3011, and the water ring vacuum pump 3011 is alternately connected with the gas outlet end of the condenser A201 and the gas outlet end of the condenser B202 through the vacuum inlet valve 11 and the gas outlet valve 10;

[0030] The drain A ends of the condensers A201 and B202 are each connected to a chilled water drain valve 12 and are arranged in parallel through the chilled water drain valve 12 and are alternately connected to the return water end of the refrigerant storage tank 401, so that the condensers A201 and B202 can return the refrigerant to the refrigerant storage tank 401 when used alternately, thereby realizing the operation switching of the condensers A201 and B202;

[0031] The drain B ends of the condenser A201 and the condenser B202 are each connected to a condensate drain valve 13 and are arranged in parallel through the condensate drain valve 13 and are alternately connected with the de-icing system 14 at the same time.

[0032] See also Figure 1 and Figure 5 The deicing system 14 includes a deicing tank 141 for deicing and a steam generator 142 for heating. The output end of the steam generator 142 is connected to a heating steam valve 15 and is connected to the air inlet end of the deicing tank 141 through the heating steam valve 15. The input end of the deicing tank 141 is alternately connected to the emptying B end of the condenser A201 and the emptying B end of the condenser B202 through the condensate emptying valve 13. The deicing ends of the condenser A201 and the condenser B202 are respectively connected to a deicing valve 16 and are arranged in parallel through the deicing valve 16 and are alternately connected to the output end of the deicing tank 141. The output end of the deicing tank 141 is connected to a deicing pump 17 and is alternately connected to the deicing ends of the condenser A201 and the condenser B202 through the deicing pump 17 and the deicing valve 16; the sewage end of the deicing tank 141 is connected to a sewage pump 18 for sewage discharge and is connected to an oil separator 19 for collecting sewage through the sewage pump 18.

[0033] The working principle and use process of the utility model: Figure 1-Figure 5 As shown in the figure, after the vacuum system is assembled, the operator places the vacuum system as a whole in the oil processing equipment (the functions and structures of conventional equipment such as oil processing equipment are well known in the art, and the connection settings are also common knowledge, so no further explanation is given here and it is not shown in the attached drawings). The purpose is to effectively control the stability of the operation of the refrigeration cycle system 4, so that a small part of the refrigerant is sent to the refrigeration unit 402 for refrigeration, so that the temperature in the refrigerant storage tank 401 is always maintained at -28°C, effectively reducing the refrigerant flow passing through the refrigeration unit 402, reducing the processing capacity of the refrigeration unit 402, effectively reducing energy consumption, solving the problem of the refrigeration unit 402 being in a full-load operation state for a long time, greatly improving the stability of the operation of the refrigeration unit 402, achieving the purpose of continuous operation, thereby ensuring the production efficiency of oil processing, and also enabling the vacuum system to consume no large amount of steam during operation, thereby achieving significant energy-saving effects, and at the same time enabling the waste heat generated by the vacuum system during the cooling process to be effectively utilized, thereby further reducing energy consumption and carbon emissions, reducing maintenance costs, ensuring the effect and efficiency of oil deodorization, and being suitable for large-scale processing of oils and fats.

[0034] When the oil is vacuum deodorized, the oil will first enter the deodorization tower 1 for deodorization. During the deodorization process, a gas phase (including water vapor, fatty acids, etc.) will be generated, and the gas phase will be vacuum-drawn into the condenser group 2, and the gas-liquid separation will be carried out through the cooling and solidification method of the Roots vacuum system 3 and the refrigeration cycle system 4, so that the oxidation stability of the polyunsaturated acid oil in the oil is effectively improved, and its smoke point can reach above 220°C, and the acid value is extremely low, which effectively inhibits the phenomenon of color reversion and odor reversion, effectively controls indicators such as 3-MCPDE, GE and trans fatty acids, and also effectively improves the efficiency of economic benefits. Specifically: before the vacuum system is put into operation, the air in it needs to be discharged and the deodorization vacuum degree needs to be set, and then the liquid ammonia refrigeration system of condenser group 2 needs to be turned on to put condenser A201 or condenser B202 into operation (if condenser A201 is in operation, condenser B202 is in deicing state; if condenser B202 is in operation, condenser A201 is in deicing state), and then the air inlet valve 9 (the air inlet valve is in the normally closed state) is opened to allow the gas phase generated by oil deodorization to be drawn into the condenser through the air inlet valve 9 under vacuum. Condenser A201 or condenser B202, at the same time, open the water inlet valve 7 and the return valve 8 (the water inlet valve and the return valve are both in the normally closed state), at this time, a small part of the refrigerant temporarily stored in the refrigerant storage tank 401 will be transported to the refrigeration unit 402 through the refrigeration circulation pump 5 with a small flow setting, and then transported to the circulating cooling tower 403 through the refrigeration unit 402 for refrigeration, and then sent back to the refrigeration unit 402 after refrigeration, and then transported to the refrigerant storage tank 401, and the refrigerated refrigerant will enter the cooling tower 403 through the refrigerant circulation pump 6 and the return valve 8. Condenser A201 or condenser B202, and the refrigerant in condenser A201 or condenser B202 will be transported to the refrigerant storage tank 401 through the water inlet valve 7 for heat exchange, so that the temperature of the refrigerant in the refrigerant storage tank 401 is always at -28°C, which effectively reduces the refrigerant flow passing through the refrigeration unit 402, reduces the processing capacity of the refrigeration unit 402, effectively reduces energy consumption, solves the problem of the refrigeration unit 402 being in a full-load operation state for a long time, greatly improves the stability of the operation of the refrigeration unit 402, and realizes The purpose of continuous operation is achieved, thereby ensuring the production efficiency of oil processing. The gas phase sucked into condenser A201 or condenser B202 will form a layer of ice on the surface of the tubes of condenser A201 or condenser B202 under the action of refrigerant heat exchange. Then open the vacuum inlet valve 11 and the outlet valve 10 (the vacuum inlet valve and the outlet valve are both in the normally closed state), and use the vacuum system A301 or vacuum system B302 (if the vacuum system A301 is working, the vacuum system B302 is in the standby state;When the vacuum system B302 is working, the vacuum system A301 is in standby mode), the vacuum effect of which causes the non-condensable gas (not containing fatty acid volatiles and water vapor) to be generated in the air trap system formed by the deodorizing tower 1 and the condenser A201 or the condenser B202 and is drawn into the vacuum system A301 or the vacuum system B302. After being processed by the water ring vacuum pump 3011, the first-stage Roots pump 3012, the second-stage Roots pump 3013 and the third-stage Roots pump 3014, part of the soluble substances in the non-condensable gas will be separated and dissolved into the waste liquid and enter the waste liquid circulation pipeline, while the insoluble gas will be exhausted. When the ice layer on the surface of the tubes of the condenser A201 or the condenser B202 is The thickness will switch according to the operation for 3 to 4 hours, that is, a condenser in standby state will be switched to operation state, and a condenser after the operation will enter the deicing state. Before the deicing operation, the refrigerant in the condenser must be emptied (that is, the chilled water drain valve 12 is opened (the chilled water drain valve is in the normally closed state), so that the refrigerant in the condenser is discharged into the refrigerant storage tank 401), and then the deicing pump 17 and the deicing valve 16 (the deicing valve is in the normally closed state) are opened. At the same time, the steam generator 142 is turned on, and the heating steam valve 15 is opened (the heating steam valve is in the normally closed state). At this time, the steam or hot water generated by the steam generator 142 will enter the deicing tank 141 through the deicing tank 141 The ice is then pumped into the de-icing pump 17 and then enters the condenser after the operation is completed through the de-icing pump 17 and the de-icing valve 16, so that the ice attached to the surface of the condenser tubes after the operation is completed is melted into condensed material, and then the condensed material emptying valve 13 is opened (the condensed material emptying valve is in a normally closed state). At this time, the condensed material will be discharged into the de-icing tank 141 through the condensed material emptying valve 13 (because the condensed material emptying pipe connected to the emptying B end of the condenser A201 or the emptying B end of the condenser B202 is inserted into the de-icing tank 141, the problem that the melted condensed material cannot be normally discharged due to air blockage caused by hot air flowing upward through the condensed material emptying pipe is solved), and discharged into the de-icing tank 141 The condensed material (the condensed material is a mixture of water and fatty acids melted from ice) is transported to the grease trap 19 via the sewage pump 18. After deicing, the condensed material drain valve 13, the heating steam valve 15 and the steam generator 142, the deicing pump 17 and the deicing valve 16 are closed, and then the cooling valve of the deiced condenser is slowly opened to condense the residual water vapor inside the condenser into ice, thereby generating a vacuum in the condenser, and the vacuum valve and process valve of the condenser are opened to put the condenser into operation state, and then another condenser is put into deicing state, and the operation is repeated so that the fatty acids in the oil and fat can be separated from the fatty acids and water in the separation tank, thereby achieving the purpose of deodorization. ;

Claims

1. A vacuum system for oil deodorization, comprising a deodorization tower, a condenser group connected to the deodorization tower, and a Roots vacuum system, a refrigeration cycle system and a deicing system connected to the condenser group, characterized in that: The refrigeration cycle system includes a refrigerant liquid storage tank, a refrigeration unit and a circulating cooling tower, the input end of the circulating cooling tower is connected to the water outlet end of the refrigeration unit, the output end of the circulating cooling tower is connected to the water inlet end of the refrigeration unit, the cold inlet end of the refrigeration unit is connected to a refrigeration circulation pump and is connected to the cold outlet end of the refrigerant liquid storage tank through the refrigeration circulation pump, the cold outlet end of the refrigeration unit is connected to the cold inlet end of the refrigerant liquid storage tank, the water inlet end and the water outlet end of the refrigerant liquid storage tank are respectively connected to the return water end and the water inlet end of the condenser group and are arranged in cooperation with the Roots vacuum system through the condenser group.

2. A vacuum system for oil deodorization according to claim 1, characterized in that: The water outlet end of the refrigerant liquid storage tank is connected to a refrigerant circulation pump and is connected to the water inlet end of the condenser group through the refrigerant circulation pump.

3. A vacuum system for oil deodorization according to claim 2, characterized in that: The condenser group includes condenser A and condenser B, each of the water inlet ends of the condenser A and condenser B is provided with a water inlet valve, and is arranged in parallel through the water inlet valve and is alternately connected with the water outlet end of the refrigerant liquid storage tank through a refrigerant circulation pump; each of the water outlet ends of the condenser A and condenser B is provided with a return valve, and is arranged in parallel through the return valve and is alternately connected with the water inlet end of the refrigerant liquid storage tank.

4. A vacuum system for oil deodorization according to claim 3, characterized in that: The air inlet ends of the condenser A and the condenser B are each connected to an air inlet valve, and are arranged in parallel through the air inlet valves and are alternately connected to the air outlet end of the deodorizing tower; the air outlet ends of the condenser A and the condenser B are each connected to an air outlet valve, and are arranged in parallel through the air outlet valves and are alternately connected to the Roots vacuum system.

5. A vacuum system for oil deodorization according to claim 4, characterized in that: The Roots vacuum system comprises a vacuum system A and a vacuum system B. The input ends of the vacuum system A and the vacuum system B are respectively connected to a vacuum inlet valve and are arranged in parallel through the vacuum inlet valves and are alternately connected to the outlet ends of the condenser A and the outlet ends of the condenser B through the outlet valves.

6. A vacuum system for oil deodorization according to claim 5, characterized in that: The vacuum system A and the vacuum system B have the same structure and both include a water ring vacuum pump, a first-stage Roots pump, a second-stage Roots pump and a third-stage Roots pump. The third-stage Roots pump is connected to the second-stage Roots pump, the second-stage Roots pump is connected to the first-stage Roots pump, the first-stage Roots pump is connected to the water ring vacuum pump, and the water ring vacuum pump is alternately connected to the outlet end of the condenser A and the outlet end of the condenser B through a vacuum inlet valve and an outlet valve.

7. A vacuum system for oil deodorization according to claim 3, characterized in that: The drain A ends of the condensers A and B are each connected to a chilled water drain valve and are arranged in parallel through the chilled water drain valves and are alternately connected with the return water end of the refrigerant storage tank.

8. A vacuum system for oil deodorization according to claim 3, characterized in that: The drain B ends of the condenser A and the condenser B are each connected to a condensate drain valve and are arranged in parallel through the condensate drain valves and are alternately connected with the deicing system.

9. A vacuum system for oil deodorization according to claim 8, characterized in that: The deicing system includes a deicing tank and a steam generator, the output end of the steam generator is connected to a heating steam valve and is connected to the air inlet end of the deicing tank through the heating steam valve, the input end of the deicing tank is alternately connected to the emptying B ends of condenser A and condenser B through a condensate drain valve, the deicing ends of condenser A and condenser B are each connected to a deicing valve and are arranged in parallel through the deicing valves and are alternately connected to the output end of the deicing tank.

10. A vacuum system for oil deodorization according to claim 9, characterized in that: The output end of the deicing tank is connected to a deicing pump and is alternately connected to the deicing ends of condenser A and condenser B through the deicing pump and the deicing valve. The sewage end of the deicing tank is connected to a sewage pump and is connected to a grease trap through the sewage pump.

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