Phosphate fire-resistant hydraulic oil blending system and method for power plant
By adopting temperature control and agitation systems in the production of phosphate fuel-resistant hydraulic oil, the problem of time-consuming and inaccurate addition of traditional blending methods is solved, and a more efficient and accurate blending process is achieved, ensuring the stability of product performance .
Patent Information
- Application Number
- CN202411522627.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-02-07
AI Technical Summary
The traditional phosphate fuel-resistant hydraulic oil blending method takes a long time and it is difficult to achieve uniform distribution of each component, resulting in inaccurate addition amounts and affecting product performance.
Using a system including raw material kettle, blending kettle, additive storage tank and controller, through temperature control and use of agitator, ensure that each material is mixed at the optimal temperature, and the complete dissolution of each component additive is achieved through a rinser.
It improves the blending accuracy and production efficiency of phosphate flame-resistant hydraulic oil, ensuring stable and reliable performance of the blended product.
Smart Images
Figure CN119386705A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of flame-resistant hydraulic oil blending, and relates to a system and method for blending phosphate flame-resistant hydraulic oil for power plants. Background Art
[0002] Phosphate ester fire-resistant oil hydraulic oil, as an important high-performance lubricant in modern industry, has been widely used in many fields such as electricity, chemical industry, metallurgy, etc. with its unique chemical structure and excellent physical properties. This oil product is based on phosphate ester. By adding different dosages and types of additives in a scientific and reasonable manner, its ignition point is significantly improved, so that it can maintain stable performance in harsh environments of high temperature and high pressure, ensuring the safe operation of the oil system.
[0003] Phosphate ester fire-resistant oil not only has excellent flame retardancy and can effectively prevent the occurrence of fire in high temperature environment, but also has good lubricity, oxidation stability and low volatility. These characteristics make phosphate ester fire-resistant oil play an irreplaceable role in key equipment such as turbine speed control system. In addition, its low vapor pressure also reduces the volatile loss of oil products and improves the operating efficiency of the system. More importantly, phosphate ester fire-resistant oil will not produce flammable and explosive decomposition products during the combustion process, nor will it transmit flames along the oil flow. Even if the gas composed of oil decomposition products burns, it will not cause the combustion of the entire gas system, thereby ensuring the safety of the system.
[0004] However, there are many challenges in the production process of phosphate fire-resistant oil. Although the traditional tank blending method meets the production needs to a certain extent, it is difficult to further improve the production efficiency and quality due to its inherent limitations. Specifically, due to the large differences in physical properties such as viscosity and reaction temperature between the base oil and the additives, the traditional stirring and mixing method often takes a long time and it is difficult to achieve uniform distribution of the components. This not only reduces production efficiency, but may also lead to inaccurate addition of each component, thus affecting the final performance of the product. Summary of the invention
[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to provide a phosphate ester fire-resistant hydraulic oil blending system and method for power plants, so as to solve the problems in the prior art that the traditional blending method in the production of phosphate ester fire-resistant oil is time-consuming and the addition amount of each component is inaccurate.
[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A phosphate ester fire-resistant hydraulic oil blending system for power plants, comprising a raw material kettle, a blending kettle, an additive storage tank A and an additive storage tank B; The raw material discharge valve of the raw material kettle is connected to the hydraulic oil feed valve of the blending kettle; the raw material kettle is provided with a raw material thermometer and a raw material heater The upper end of the blending kettle is connected to the additive storage tank A through the additive A feed valve, and the upper end of the blending kettle is connected to the additive storage tank B through the additive B feed valve; The blending kettle is provided with an agitator, a hydraulic oil thermometer and a hydraulic oil heater; The raw material discharge valve, hydraulic oil feed valve, raw material thermometer, raw material heater, stirrer, hydraulic oil thermometer and hydraulic oil heater are commonly connected to a controller, and the controller is also connected to an air compressor; The opening time of the additive A feed valve and the additive B feed valve is determined according to the temperature in the blending kettle.
[0007] A further improvement of the present invention is: Preferably, a raw material thermometer and a raw material pressure gauge are provided in the raw material kettle.
[0008] Preferably, a hydraulic oil pressure gauge is provided in the blending kettle; Preferably, an additive A flusher is provided at the bottom of the blending kettle, and the additive A flusher is connected to the inlet of the additive A feed valve; an additive B flusher is provided at the bottom of the blending kettle, and the additive B flusher is connected to the inlet of the additive B feed valve.
[0009] Preferably, a nitrogen bottle is connected to the upper portion of the blending kettle, and a hydraulic oil discharge valve and a blending sampling valve are provided at the bottom of the blending kettle.
[0010] A blending method based on the above-mentioned phosphate ester fire-resistant hydraulic oil blending system for power plants comprises the following steps: S1, heating the raw material kettle through the raw material heater. When the raw material temperature measured by the raw material thermometer meets the set temperature 1, the controller controls the raw material discharge valve and the hydraulic oil feed valve to open, and the raw material is input from the raw material kettle to the blending kettle; the hydraulic oil heater heats the blending kettle; S2, when the hydraulic oil temperature measured by the hydraulic oil thermometer is greater than the set temperature 2, the controller controls the agitator to start stirring, and at the same time controls the additive A feed valve to open, the additive storage tank A inputs additive A into the blending kettle, and the agitator continues to stir the liquid in the blending kettle; S3, the controller controls the heater to heat the blending kettle. When the hydraulic oil temperature measured by the hydraulic oil thermometer is greater than the set temperature three, the controller controls the additive B feed valve to open, the additive storage tank B inputs additive B into the blending kettle, and the agitator continuously stirs the liquid in the blending kettle; S4, after the temperature drops to the set temperature four, the blending is completed.
[0011] Preferably, the amount of additive A added is 0.005-0.012 of the mass of the raw material, and the amount of additive B added is 0.002-0.006 of the mass of the raw material.
[0012] Preferably, after S2, after the additive A is added, the additive A flusher flushes the additive A feed valve.
[0013] Preferably, after S3, after the additive B is added, the additive B flusher flushes the additive B feed valve.
[0014] Preferably, during the blending process, when the temperature or pressure alarm in the blending kettle sounds, the controller controls the heater to stop heating and the agitator to stir at a low speed.
[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a phosphate ester fire-resistant hydraulic oil blending system for power plants, the system delivers raw materials to a blending kettle through a raw material pump, the blending kettle is provided with a stirring device, a heater, an additive A flusher and an additive B flusher, adopts low-speed stirring, adjusts the temperature of the material in the blending kettle to 60°C through the heater, and then performs high-speed stirring, and delivers additive A to the blending kettle through a feed pump A, and starts the additive A flusher to completely dissolve additive A into the blending kettle; adjusts the temperature of the material in the blending kettle to 60°C through a heater, and delivers additive B to the blending kettle through a feed pump B, and starts the additive B flusher to completely dissolve additive B into the blending kettle. The present invention adopts temperature control to ensure that the reaction and blending of each material is at an optimal temperature, and at the same time uses a flusher to completely and effectively dissolve each component additive into the blending kettle, thereby improving the blending accuracy of the phosphate ester fire-resistant hydraulic oil and ensuring that the performance of the blended phosphate ester fire-resistant hydraulic oil is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a diagram of the phosphate ester fire-resistant hydraulic oil blending system.
[0017] Among them, 1. raw material kettle; 2. blending kettle; 3. additive storage tank A; 4. additive storage tank B; 5. nitrogen bottle; 6. raw material pump; 7. feed pump A; 8. feed pump; 9. controller; 10. barometer; 101. raw material feed valve; 102. raw material discharge valve; 103. raw material heater; 104. raw material thermometer; 105. raw material pressure gauge; 201 hydraulic oil feed valve; 202. hydraulic oil discharge valve; 203. hydraulic oil heater; 204. hydraulic oil thermometer; 205. hydraulic oil pressure gauge; 206. agitator; 207. additive A flusher; 208. additive B flusher; 209. additive A feed valve; 210. additive B feed valve; 211. nitrogen valve; 212. blending sampling valve. DETAILED DESCRIPTION
[0018] The present invention is further described in detail below in conjunction with the accompanying drawings: In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0019] As the problem raised in the background technology, the hydraulic oil of phosphate fire-resistant oil is based on phosphate ester. By adding different dosages and different types of additives, the ignition point is higher, and the safety of the oil system can be ensured under high temperature environment. Phosphate fire-resistant oil is treated to have good flame retardancy, good lubricity and oxidation stability, low volatility and good additive sensitivity. The outstanding characteristics of phosphate fire-resistant oil are lower vapor pressure than petroleum-based liquid oil, no decomposition products that are easy to smoke and maintain combustion, and no flame is transmitted along the oil flow, and even the gas composed of oil decomposition products will not cause the entire gas to burn after combustion. Therefore, power plants mostly use acid ester fire-resistant oil as the hydraulic working medium of the turbine speed control system. However, in the production of phosphate fire-resistant oil, most of them adopt the tank-type blending method, the base oil and the additives of each component are mixed in proportion and added into the tank, and the stirring method is adopted to mix evenly. Due to the large difference in the viscosity of the base oil and the components and the temperature of the reaction blending, the traditional blending method is time-consuming, and the amount of each component added is inaccurate.
[0020] To solve the above problems, see Figure 1 The first aspect of the present invention discloses a phosphate ester flame retardant hydraulic oil blending system for a power plant, comprising a raw material kettle 1, a blending kettle 2, an additive storage tank A, an additive storage tank B, a nitrogen bottle 5, a raw material pump 6, a feed pump A, a feed pump B, a controller 9 and a barometer 10.
[0021] The raw material kettle 1 is provided with a raw material feed valve 101, a raw material discharge valve 102, a raw material heater 103, a raw material thermometer 104, and a raw material pressure gauge 105. The raw material feed valve 101 is located at the upper part of the raw material kettle 1, and the raw material discharge valve 102 is located at the lower part of the raw material kettle 1. The raw material thermometer 104 is used to measure the temperature of the raw material in the raw material kettle 1, the raw material pressure gauge 105 is used to measure the pressure of the raw material in the raw material kettle 1, and the raw material heater 103 is used to heat the raw material in the raw material kettle 1 so that the heat of the raw material meets the requirements. The raw material is phosphate ester.
[0022] The blending kettle 2 includes a hydraulic oil feed valve 201, a hydraulic oil discharge valve 202, a hydraulic oil heater 203, a hydraulic oil thermometer 204, a hydraulic oil pressure gauge 205, an agitator 206, an additive A flusher 207, an additive B flusher 208, an additive A feed valve 209, an additive B feed valve 210, a nitrogen valve 211 and a blending sampling valve 212.
[0023] The hydraulic oil feed valve 201 is located at the upper part of the blending kettle 2 , and the hydraulic oil discharge valve 202 is located at the lower part of the blending kettle 2 .
[0024] The additive A flusher 207 is located at the bottom of the blending kettle 2, and the additive A flusher 207 is connected to the additive A feed valve 209, the blending sampling valve 212 and the additive storage tank A; specifically, the additive A flusher 207 has its own pump, the inlet is connected to the blending kettle 2, and oil can be extracted from the blending kettle 2, and the outlet is connected to the near-outlet pipeline of the feed pump A to reduce the length of the unflushed pipeline.
[0025] The additive B flusher 208 is located at the bottom of the blending kettle 2, and is connected to the additive B feed valve 210, the blending sampling valve 212 and the additive storage tank B; the additive B flusher 208 has its own pump, the inlet of which is connected to the blending kettle 2, and oil can be extracted from the blending kettle 2, and the outlet is connected to the near-outlet pipeline of the feed pump B to reduce the length of the unflushed pipeline.
[0026] The nitrogen valve 211 is located at the upper part of the blending kettle 2 and is connected to the nitrogen bottle 5 . The nitrogen bottle 5 can transport nitrogen into the blending kettle 2 through the nitrogen valve 211 .
[0027] The inlet of the raw material pump 6 is connected to the raw material discharge valve 102 , and the outlet is connected to the feed valve 201 , and the feed valve 201 is at the upper part of the blending kettle 2 .
[0028] The inlet of the feed pump A is connected to the outlet of the additive storage tank A, and the outlet of the feed pump A is connected to the additive A feed valve 209. Additive A is an antioxidant, such as antioxidant T501, 2,6-di-tert-butyl-p-cresol (BHT).
[0029] The inlet of the feed pump B is connected to the additive storage tank B, and the outlet of the feed pump B is connected to the additive B feed valve 210. The additive B is a rust inhibitor, and the rust inhibitor B is preferably T746, i.e., dodecenylsuccinic acid.
[0030] The blending kettle 2 is provided with a stirrer 206 for stirring and mixing the raw materials and additives in the blending kettle 2 evenly.
[0031] A blending sampling valve 212 is provided at the bottom of the blending kettle 2. When opened, the phosphate ester fire-resistant hydraulic oil can be taken out from the bottom of the blending kettle 2 for inspection.
[0032] A hydraulic oil thermometer 204 is provided at the lower part of the blending kettle 2 for measuring the temperature of the phosphate ester fire-resistant hydraulic oil.
[0033] A hydraulic oil pressure gauge 205 is also provided in the upper part of the blending kettle 2 for measuring the pressure in the blending kettle 2.
[0034] The controller 9 is electrically connected to the raw material feed valve 101, the raw material discharge valve 102, the raw material heater 103, the raw material thermometer 104, the raw material pressure gauge 105, the hydraulic oil feed valve 201, the hydraulic oil discharge valve 202, the hydraulic oil heater 203, the hydraulic oil thermometer 204, the hydraulic oil pressure gauge 205, the agitator 206, the additive A flusher 207, the additive B flusher 208, the additive A feed valve 209, the additive B feed valve 210, the nitrogen valve 211, the blending sampling valve 212, the raw material pump 6, the feed pump A, the feed pump B and the barometer 10.
[0035] The main function of the hydraulic oil heater 203 is to provide the necessary heat for the phosphate base oil and various component additives in the blending process to ensure that they can be fully mixed at the appropriate temperature and undergo the expected chemical reaction. By heating, the viscosity of the oil can be reduced and the fluidity can be improved, thereby accelerating the mixing process and improving the blending efficiency. At the same time, the appropriate temperature also helps to evenly disperse the additives in the base oil, improving the uniformity and stability of the product. The specific hydraulic oil heater 203 can be a steam heater, an electric heater or a thermal oil heater.
[0036] Steam heater: Use steam as a heat source to transfer heat to the oil in the raw material kettle 1 through heat exchange. Steam heater has the advantages of fast heating speed and high thermal efficiency, but attention should be paid to the insulation and drainage of steam pipes to avoid heat loss and safety hazards.
[0037] Electric heater: Heats the oil by the heat generated by electric current. Electric heaters have the advantages of easy operation and control, but attention should be paid to electrical safety and energy consumption issues.
[0038] Thermal oil heater: Thermal oil is used as the heat transfer medium. The circulating pump sends the thermal oil into the heater for heating, and then transfers the heat to the oil in the raw material kettle. Thermal oil heater has the advantages of uniform heating and controllable temperature, but attention should be paid to the selection of thermal oil and the maintenance of the circulation system.
[0039] The second aspect of the present invention discloses a method for blending phosphate ester fire-resistant hydraulic oil for power plants, the specific process of the method is as follows: S1, the raw material kettle 1 is heated by the raw material heater 103. When the raw material temperature measured by the raw material thermometer 104 meets the set temperature 1, the controller 9 controls the raw material discharge valve 102 and the hydraulic oil feed valve 201 to open, and the raw material is input from the raw material kettle 1 to the blending kettle 2; the hydraulic oil heater 203 heats the blending kettle 2; S2, when the hydraulic oil temperature measured by the hydraulic oil thermometer 204 is greater than the set temperature 2, the controller 9 controls the agitator 206 to start stirring, and at the same time controls the additive A feed valve 209 to open, the additive storage tank A inputs additive A into the blending kettle 2, and the agitator 206 continues to stir the liquid in the blending kettle 2; S3, the controller 9 controls the hydraulic oil heater 203 to heat the blending kettle 2. When the hydraulic oil temperature measured by the hydraulic oil thermometer 204 is greater than the set temperature 3, the controller 9 controls the additive B feed valve 210 to open, the additive storage tank B inputs the additive B into the blending kettle 2, and the agitator 206 continuously stirs the liquid in the blending kettle 2; S4, after the temperature drops to the set temperature four, the blending is completed.
[0040] In one embodiment of the present invention, a specific blending method is disclosed, comprising the following steps: (1) The raw material barometer 10 collects the atmospheric pressure as P 0 bar; (2) The controller 9 controls the raw material heater 103 to heat the raw material kettle 1 to a set temperature of 40°C; the controller 9 monitors the raw material thermometer 104 and the raw material pressure gauge 105 to obtain the temperature T of the raw material kettle 1 in real time. 1 and pressure P 1 When the temperature exceeds 45°C or the pressure exceeds 1.1 times the atmospheric pressure, an alarm will sound. The alarm pressure P A1 =1.1*P 0 .
[0041] (3) When the temperature or pressure alarm appears in the raw material kettle 1, the heating is stopped.
[0042] (4) The controller 9 controls the raw material discharge valve 102 of the raw material pump 6. Under the action of the raw material pump 6, M kg of raw material is delivered to the blending kettle 2 through the fuel feed valve 201. The range of M is 2000-10000 kg. (5) The controller 9 controls the nitrogen valve 211 to deliver nitrogen to the blending kettle 2 to replace the air in the blending kettle 2.
[0043] (6) The controller 9 controls the hydraulic oil heater 203 to heat the blending kettle 2 to 60°C; the controller 9 monitors the hydraulic oil thermometer 204 and the hydraulic oil pressure gauge 205 to obtain the temperature T of the blending kettle 2 in real time. 2 and pressure P 2 When the temperature exceeds 65℃ or the pressure exceeds 1.1 times the atmospheric pressure, an alarm will sound. The alarm pressure P A2 =1.1*P 0 ; (7) When T 2 When the set temperature is <55°C, the controller 9 controls the stirrer 206 to stir at a low speed, and the speed of the stirrer 206 is 30-100 rpm. 2 When the temperature is >55°C, the controller 9 controls the stirrer 206 to perform high-speed stirring, and the rotation speed of the stirrer 9 is 100-300 rpm.
[0044] (8) When T 2 >When the set temperature is 55℃, start the feed pump A to transfer M a kg additive A is transported to blending kettle 2, and then M a After 100 kg of additive A is delivered, the additive A flusher 207 is started to completely dissolve the additive A into the blending kettle.
[0045] (9) Feed pump A delivers M kg of raw material according to the ratio aa to control the weight of additive A M a kg, Ma=M*aa, the value range of aa is 0.005~0.012.
[0046] (10) Additive A flushing device 207 uses the material in the blending kettle 2 to flush the additive A feed valve 209 to ensure that M a kg weight of additive A is fully and effectively added to the blending kettle.
[0047] (11) The controller 9 controls the stirrer 206 to stir at a low speed.
[0048] (12) The controller 9 controls the hydraulic oil heater 203 to heat the blending kettle 2 to 80°C; when the temperature exceeds 82°C or the pressure exceeds 1.1 times the atmospheric pressure, an alarm PA is triggered. 2 =1.1*P 0 .
[0049] (13) When the temperature or pressure alarm appears in the blending kettle 2, the heating is stopped and the agitator 206 performs low-speed stirring; (14) When T 2>When the set temperature is 75°C, the controller 9 controls the stirrer 206 to stir at high speed and starts the feed pump B to transfer M b kg of additive B is transported to the blending kettle 2, and then b After 100 kg of additive B is delivered, the additive B flusher is started to completely dissolve the additive B into the blending kettle 2.
[0050] (15) Feed pump B delivers M kg of raw material according to raw material pump 6, and controls the weight of additive B according to proportion bb. b kg,M b =M*bb, the value range of bb is 0.002~0.006.
[0051] (16) Additive B flusher 208 uses the material in the blending kettle 2 to flush the additive B feed valve 210 to ensure that M b kg weight of additive B is fully and effectively added to the blending kettle.
[0052] Due to the different viscosities of the additives, the material in the blending kettle 2 is used to flush the additive A feed valve 209 and the additive B feed valve, so that each additive can be effectively added to the blending kettle for blending, ensuring that the performance of the blended phosphate fire-resistant hydraulic oil is stable and reliable.
[0053] (17) After the additive B is completely and effectively added to the blending kettle 2, the hydraulic oil heater 203 is turned off and the agitator 206 is stirred at a low speed until the temperature T 2 When the set temperature is 40°C, the phosphate fire-resistant hydraulic oil is blended, and the controller 9 controls the hydraulic oil discharge valve 202 to open.
[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A phosphate ester fire-resistant hydraulic oil blending system for power plants, characterized in that: It comprises a raw material kettle (1), a blending kettle (2), an additive storage tank A and an additive storage tank B; The raw material discharge valve (102) of the raw material kettle (1) is connected to the hydraulic oil feed valve (201) of the blending kettle (2); the raw material kettle (1) is provided with a raw material thermometer (104) and a raw material heater (103). The upper end of the blending kettle (2) is connected to the additive storage tank A via an additive A feed valve (209), and the upper end of the blending kettle (2) is connected to the additive storage tank B via an additive B feed valve (210); The blending kettle (2) is provided with a stirrer (206), a hydraulic oil thermometer (204) and a hydraulic oil heater (203); The raw material discharge valve (102), the hydraulic oil feed valve (201), the raw material thermometer (104), the raw material heater (103), the stirrer (206), the hydraulic oil thermometer (204) and the hydraulic oil heater (203) are commonly connected to a controller (9), and the controller (9) is also connected to an air compressor (10); The opening time of the additive A feed valve (209) and the additive B feed valve (210) is determined according to the temperature in the blending kettle (2).
2. A phosphate ester fire-resistant hydraulic oil blending system for power plants according to claim 1, characterized in that: The raw material kettle (1) is provided with a raw material thermometer (104) and a raw material pressure gauge (105).
3. The phosphate ester fire-resistant hydraulic oil blending system for power plants according to claim 1, characterized in that: The blending kettle (2) is provided with a hydraulic oil pressure gauge (205).
4. The phosphate ester fire-resistant hydraulic oil blending system for power plants according to claim 1, characterized in that: An additive A flusher (207) is provided at the bottom of the blending kettle (2), and the additive A flusher (207) is communicated with an inlet of an additive A feed valve (209); an additive B flusher (208) is provided at the bottom of the blending kettle (2), and the additive B flusher (208) is communicated with an inlet of an additive B feed valve (210).
5. The phosphate ester fire-resistant hydraulic oil blending system for power plants according to claim 1, characterized in that: The upper part of the blending kettle (2) is connected to a nitrogen bottle (5), and the bottom of the blending kettle (2) is provided with a hydraulic oil discharge valve (202) and a blending sampling valve (212).
6. A blending method based on the phosphate ester fire-resistant hydraulic oil blending system for power plants according to claim 1, characterized in that: The following steps are involved: S1, heating the raw material kettle (1) by the raw material heater (103); when the raw material temperature measured by the raw material thermometer (104) meets the set temperature 1, the controller (9) controls the raw material discharge valve (102) and the hydraulic oil feed valve (201) to open, and the raw material is input from the raw material kettle (1) to the blending kettle (2); the hydraulic oil heater (203) heats the blending kettle (2); S2, when the hydraulic oil temperature measured by the hydraulic oil thermometer (204) is greater than the set temperature 2, the controller (9) controls the stirrer (206) to start stirring, and at the same time controls the additive A feed valve (209) to open, the additive storage tank A inputs additive A into the blending kettle (2), and the stirrer (206) continues to stir the liquid in the blending kettle (2); S3, the controller (9) controls the hydraulic oil heater (203) to heat the blending kettle (2), and when the hydraulic oil temperature measured by the hydraulic oil thermometer (204) is greater than the set temperature three, the controller (9) controls the additive B feed valve (210) to open, the additive storage tank B inputs the additive B into the blending kettle (2), and the agitator (206) continuously stirs the liquid in the blending kettle (2); S4, after the temperature drops to the set temperature four, the blending is completed.
7. The blending method according to claim 6, characterized in that: The amount of additive A added is 0.005~0.012 of the mass of the raw material, and the amount of additive B added is 0.002~0.006 of the mass of the raw material.
8. The blending method according to claim 6, characterized in that: After S2, after the additive A is added, the additive A flusher (207) flushes the additive A feed valve (209).
9. The blending method according to claim 6, characterized in that: After S3, after the additive B is added, the additive B flusher (208) flushes the additive B feed valve (210).
10. The blending method according to claim 6, characterized in that: During the blending process, when the temperature or pressure alarm in the blending kettle (2) is sounded, the controller (9) controls the hydraulic oil heater (203) to stop heating and the agitator (206) to stir at a low speed.