Emptying system for a biological wastewater collection tank

Abstract

The utility model provides a kind of emptying system for biological wastewater collection tank, including heater, cooler, cooling tank and filter;Biological wastewater inactivation tank is communicated with the bottom of biological wastewater collection tank;The air inlet end of heater is communicated with the top of biological wastewater collection tank, for heating exhaust gas;The air inlet end of cooling tank is communicated with the air outlet end of heater, and cooling tank contains disinfectant solution, for cooling heated exhaust gas, and its internal disinfectant solution can neutralize harmful gas;The air inlet end of cooler is communicated with the air outlet end of cooling tank, and the exhaust gas discharged from cooling tank is cooled by cooler again;Filter is to filter exhaust gas and discharge it.

Description

Technical Field

[0001] This utility model relates to the field of biotechnology industry, specifically to an emptying system for biological wastewater collection tanks. Background Technology

[0002] In the pharmaceutical industry, wastewater related to biosafety includes cleaning wastewater from virus culture reactors, cleaning wastewater from bacterial reactors, cleaning wastewater and bath water from negative pressure zones, concentrated permeate waste liquid, and condensate from SIP equipment in negative pressure zones. When compressed air is used to purge equipment such as bioreactors, gas is generated, and hot gas is generated at the downstream end of the equipment SIP and steam trap. Wastewater, hot gas, and gas are first collected in a biological wastewater collection tank through drainage pipelines. The wastewater is then transferred by pump to a biological wastewater inactivation tank for high-temperature and high-pressure treatment to kill all pathogenic microorganisms before it can be discharged to the next stage of the sewage treatment system for further treatment.

[0003] During the biological wastewater collection process, a large amount of waste gas (hot gas and gases) needs to be discharged from the biological wastewater collection tank. The biological wastewater collection pipeline and the biological wastewater collection tank should be at normal pressure so that the biological wastewater can be smoothly discharged to the biological wastewater collection tank through the drainage pipeline. The waste gas contains a large number of pathogenic microorganisms such as bacteria and viruses. If it is discharged directly, it will involve biosafety issues, and the harmful gases will cause the factory environment to fail to meet the cleanroom requirements. If the biological wastewater collection tank is equipped with a filter for discharge, on the one hand, the large amount of hot gas will easily clog the filter after wetting it; on the other hand, most viral pathogenic microorganisms can pass through the filter, which will still pose biosafety and environmental pollution problems.

[0004] Patent document CN220467613U discloses a treatment system for filtering, collecting, and inactivating biological wastewater, including a wastewater collection and inactivation tank. The top of the tank is equipped with a test light and a bioverification interface. A pneumatic stirrer is also installed on the top of the tank, directly connected to the inner bottom of the tank. The stirrer has a ventilation pipe communicating with its interior. A support base is fixed to the bottom of the tank. A basket filter is connected at one end to the inlet of the tank. A support column is mounted at one end on the stirrer and at the other end with a first support member. A second support member is mounted on top of the first support member. In this design, the biological wastewater collection and inactivation are performed using the same pressure vessel, and the issue of exhaust gas venting is not mentioned. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of this utility model is to provide an emptying system for biological wastewater collection tanks.

[0006] The evacuation system for a biological wastewater collection tank provided by this utility model includes a heater, a cooler, a cooling tank, a biological wastewater inactivation tank, and a filter.

[0007] The bottom of the biological wastewater inactivation tank is connected to the bottom of the biological wastewater collection tank, and it is used for high-temperature inactivation treatment of biological wastewater.

[0008] The heater's inlet is connected to the top of the biological wastewater collection tank, and the heater is used to heat the exhaust gas discharged from the biological wastewater collection tank.

[0009] The air inlet of the cooling tank is connected to the air outlet of the heater. The cooling tank is used to cool the heated exhaust gas. The cooling tank contains a disinfection solution to neutralize harmful gases.

[0010] The air inlet of the cooler is connected to the air outlet of the cooling tank, and the exhaust gas discharged from the cooling tank is further cooled by the cooler.

[0011] The air inlet of the filter is connected to the air outlet of the cooler, and the filter is used to filter the exhaust gas cooled by the cooler.

[0012] Preferably, the heater includes a heater housing, a first fixed tube sheet, and a first heat exchange tube array;

[0013] The first heat exchange tube is fixedly installed inside the heater housing by a first fixed tube sheet, and the heater housing has a first gas inlet and a first gas outlet at its two ends, respectively.

[0014] The exhaust gas discharged from the biological wastewater collection tank enters the heater through the first gas inlet, is heated by the first heat exchange tube, and is discharged to the cooling tank through the first gas outlet.

[0015] Preferably, the heater further includes a second regulating valve, a second pneumatic ball valve, and a drain valve;

[0016] The heater housing is provided with a steam inlet pipe for heating the first heat exchange tubes, and the second regulating valve is installed on the steam inlet pipe;

[0017] The heater housing has a condensate outlet pipe at its bottom, and the second pneumatic ball valve and the drain valve are sequentially installed on the condensate outlet pipe.

[0018] Preferably, the cooling tank includes a tank body and a jacket disposed outside the tank body;

[0019] The gas outlet of the heater is connected to the gas inlet pipe of the tank, and the gas outlet pipe of the tank is connected to the inlet of the cooler. The tank contains a disinfection solution.

[0020] The jacket is connected to a chilled water inlet pipe and a chilled water outlet pipe. A fourth regulating valve is installed on the chilled water inlet pipe, and a fourth pneumatic ball valve is installed on the chilled water outlet pipe.

[0021] Preferably, one end of the gas inlet pipe located inside the tank is connected to a bubble ring, and the bubble ring has evenly distributed air holes.

[0022] A stirring mechanism is installed at the bottom of the tank.

[0023] Preferably, the tank body has a pressure sensor and a level gauge on the tank cover, and a fourth temperature sensor is provided at the bottom of the tank body;

[0024] The tank body is equipped with a drain pipe at the bottom, a fifth pneumatic ball valve is installed on the drain pipe, and a sixth pneumatic ball valve is installed on the gas outlet pipe.

[0025] Preferably, the cooler includes a cooler housing, a second fixed tube sheet, and a second heat exchange tube array;

[0026] The second heat exchange tube is fixedly installed inside the cooler shell through the second fixed tube sheet, and the cooler shell has a second gas inlet and a second gas outlet at both ends respectively;

[0027] The exhaust gas, after being cooled and disinfected by the cooling tank, enters the cooler through the second gas inlet, and after being cooled by the second heat exchange tubes, it is discharged from the second gas outlet.

[0028] Preferably, the cooler further includes a third regulating valve and a third pneumatic ball valve;

[0029] The cooler housing is provided with a chilled water inlet pipe for cooling the second heat exchange tubes, and the third regulating valve is installed on the chilled water inlet pipe;

[0030] The cooler housing is provided with a chilled water outlet pipe for cooling the second heat exchange tubes, and the third pneumatic ball valve is installed on the chilled water outlet pipe;

[0031] The cooler is vertically installed on the cooling tank, and the condensate generated after the exhaust gas is cooled flows back to the cooling tank through the second gas inlet.

[0032] Preferably, it also includes a filter, which is connected to the outlet of the cooler, and the exhaust gas cooled by the cooler is discharged after being filtered by the filter.

[0033] Preferably, a first regulating valve is provided between the air inlet of the heater and the biological wastewater collection tank;

[0034] A first pneumatic ball valve and a one-way valve are provided between the outlet of the heater and the cooling tank;

[0035] The heater is equipped with a first temperature sensor and a second temperature sensor at its inlet and outlet ends, respectively, and the cooler is equipped with a third temperature sensor at its outlet end.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] This invention is used for venting biological wastewater collection tanks. The waste gas is successively sterilized by a heater at high temperature and cooled and disinfected by a cooling tank. Finally, it is discharged after secondary cooling and filtration by a cooler. This not only solves the requirements for cleanliness and temperature and humidity in the factory, but also solves the problems of biosafety and environmental pollution caused by directly discharging waste gas from biological wastewater collection tanks. Attached Figure Description

[0038] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0039] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0040] Figure 2 This is a schematic diagram of the heater in this utility model;

[0041] Figure 3 This is a schematic diagram of the cooler in this utility model.

[0042] The diagram shows:

[0043] Heater 1 Second pneumatic ball valve 108

[0044] Cooler 2, Steam Trap 109

[0045] Cooling tank 3 Second gas inlet 201

[0046] Biological wastewater inactivation tank 4, second gas outlet 202

[0047] Pump 5 Second Fixed Tube Sheet 203

[0048] First regulating valve 6; Second heat exchange tube 204

[0049] Biological wastewater collection tank 7 Cooler shell 205

[0050] Biological wastewater inlet 8 Third pneumatic ball valve 206

[0051] First temperature sensor 9 Second tube bundle 207

[0052] Second temperature sensor 10 Third regulating valve 208

[0053] First pneumatic ball valve 11, pressure sensor 301

[0054] One-way valve 12, level gauge 302

[0055] Filter 13, Fourth Pneumatic Ball Valve 303

[0056] Third temperature sensor 14 Bubble ring 304

[0057] First gas inlet 101, vent 305

[0058] First gas outlet 102, stirring mechanism 306

[0059] First fixed tube sheet 103 Fifth pneumatic ball valve 307

[0060] First heat exchange tube 104; Fourth temperature sensor 308

[0061] Heater housing 105 Fourth regulating valve 309

[0062] Second regulating valve 106, sixth pneumatic ball valve 310

[0063] First tube bundle 107 Detailed Implementation

[0064] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0065] This utility model discloses an evacuation system for biological wastewater collection tanks, used to vent waste gas (hot gas and gas) from the tanks. The waste gas is sequentially sterilized at high temperature by a heater and cooled and disinfected by a cooling tank, and finally discharged after secondary cooling and filtration by a cooler. This not only solves the requirements for cleanliness and temperature and humidity in the plant, but also addresses the biosafety and harmful gas pollution problems that would result from directly venting waste gas from biological wastewater collection tanks.

[0066] According to the emptying system for biological wastewater collection tanks provided by this utility model, such as Figure 1As shown, the system includes a heater 1, a cooler 2, a cooling tank 3, and a filter 13. The biological wastewater inactivation tank 4 is connected to the bottom of the biological wastewater collection tank 7 and is used for high-temperature inactivation treatment of biological wastewater. The air inlet of the heater 1 is connected to the top of the biological wastewater collection tank 7, and the heater 1 is used to heat the waste gas output from the biological wastewater collection tank 7. The air inlet of the cooling tank 3 is connected to the air outlet of the heater 1, and the cooling tank 3 is used to cool the heated waste gas. The cooling tank 3 contains a disinfection solution for neutralizing harmful gases. The air inlet of the cooler 2 is connected to the air outlet of the cooling tank 3, and the waste gas discharged from the cooling tank 3 is further cooled by the cooler 2. The filter 13 is connected to the air outlet of the cooler 2, and the waste gas cooled by the cooler 2 is filtered by the filter 13 before being discharged.

[0067] The biological wastewater collection tank 7 is equipped with a biological wastewater inlet 8 at the top, and the biological wastewater collection tank 7 is a horizontal cylindrical pressure vessel.

[0068] This invention heats the waste gas to a certain temperature using heater 1 to kill all pathogenic microorganisms; then, the harmful gases are neutralized by a solution in cooling tank 3, and cooled by chilled water; finally, the waste gas is cooled again by cooler 2, and filtered by filter 13 before being discharged. This ensures that the discharged waste gas meets the cleanliness and temperature / humidity requirements of the factory, and the waste gas in the biological wastewater collection tank is properly treated, thus solving the problems of biosafety and environmental pollution from harmful gases.

[0069] In a preferred example, such as Figure 2 As shown, the heater 1 includes a heater housing 105, a first fixed tube sheet 103, and a first heat exchange tube array 104. The first heat exchange tube array 104 is fixedly installed inside the heater housing 105 via the first fixed tube sheet 103. The heater housing 105 has a first gas inlet 101 and a first gas outlet 102 at both ends. The exhaust gas discharged from the biological wastewater collection tank 7 enters the first heat exchange tube array 104 through the first gas inlet 101, is heated by steam, and is then discharged to the cooling tank 3 through the first gas outlet 102. Specifically, the heater 1 has identical first fixed tube sheets 103 at both ends for fixing the first heat exchange tube array 104, and the first heat exchange tube array 104 is fixed together by a first tube bundle 107.

[0070] In a preferred embodiment, the heater 1 further includes a second regulating valve 106, a second pneumatic ball valve 108, and a steam trap 109. A steam inlet pipe for heating the first heat exchange tubes 104 is provided on the heater housing 105, and the second regulating valve 106 is installed on the steam inlet pipe. A condensate outlet pipe is provided at the bottom of the heater housing 105, and the second pneumatic ball valve 108 and the steam trap 109 are sequentially arranged on the condensate outlet pipe. The heater 1 is used to heat the exhaust gas to a certain temperature. The second regulating valve 106 is the steam inlet, and the generated condensate is discharged through the opening of the second pneumatic ball valve 108 and the steam trap 109. The steam trap 109 has a steam-blocking and drainage function, which quickly discharges the condensate in the steam system while automatically preventing steam leakage to the greatest extent possible.

[0071] In a preferred embodiment, the cooling tank 3 includes a tank body and a jacket disposed outside the tank body; the gas outlet of the heater 1 is connected to the gas inlet pipe of the tank body, the gas outlet pipe of the tank body is connected to the inlet of the cooler 2, and the tank body contains a disinfection solution; the jacket is connected to a chilled water inlet pipe and a chilled water outlet pipe, a fourth regulating valve 309 is provided on the chilled water inlet pipe, and a fourth pneumatic ball valve 303 is provided on the chilled water outlet pipe.

[0072] The gas inlet pipe is connected to a bubble ring 304 at one end inside the tank, and the bubble ring 304 has evenly distributed air holes 305. A stirring mechanism 306 is provided at the bottom of the tank. A pressure sensor 301 and a level gauge 302 are provided on the tank cover, and a fourth temperature sensor 308 is provided at the bottom of the tank. A drain pipe is provided at the bottom of the tank, and a fifth pneumatic ball valve 307 is provided on the drain pipe. A sixth pneumatic ball valve 310 is provided on the gas outlet pipe. The cooling tank 3 cools and neutralizes the heated waste gas. There is a certain amount of solution in the tank. According to the principle of "like dissolves like," the corresponding solution is selected for the discharged harmful gas. The fourth regulating valve 309 is the chilled water inlet, and the fourth pneumatic ball valve 303 is the chilled water outlet. A bubble ring 304 is installed at the top of the pipe through which the waste gas enters the cooling tank 3. Through the air holes 305 on the bubble ring 304, the entering waste gas is evenly distributed in the solution inside the tank, which is conducive to the rapid neutralization of harmful gases.

[0073] In a preferred example, such as Figure 3As shown, the cooler 2 is used to further cool the gas and includes a cooler shell 205, a second fixed tube sheet 203, and a second heat exchange tube array 204. The second heat exchange tube array 204 is fixedly installed inside the cooler shell 205 via the second fixed tube sheet 203. The cooler shell 205 has a second gas inlet 201 and a second gas outlet 202 at both ends. The exhaust gas, after being cooled and disinfected by the cooling tank 3, enters the second heat exchange tube array 204 through the second gas inlet 201, is cooled by chilled water, and is discharged from the second gas outlet 202. Specifically, the cooler 2 has identical second fixed tube sheets 203 at both ends for fixing the second heat exchange tube array 204, and the second heat exchange tube array 204 is fixed together by a second tube bundle 207.

[0074] In a preferred embodiment, the cooler 2 further includes a third regulating valve 208 and a third pneumatic ball valve 206; the cooler housing 205 is provided with a chilled water inlet pipe for cooling the second heat exchange tube 204, and the third regulating valve 208 is installed on the chilled water inlet pipe; the cooler housing 205 is provided with a chilled water outlet pipe for cooling the second heat exchange tube 204, and the third pneumatic ball valve 206 is installed on the chilled water outlet pipe; the cooler 2 is vertically installed on the cooling tank 3, and the condensate generated after the exhaust gas is cooled flows back to the cooling tank 3 through the second gas inlet 201 to avoid clogging the filter 13;

[0075] In a preferred embodiment, filter 13 consists of a steel shell and a filter element, which filters and discharges the gas. The material of the filter element should be resistant to acids, alkalis and organic solvents, and the pore size should be 0.22 μm or 0.2 μm.

[0076] In a preferred embodiment, a first regulating valve 6 is provided between the air inlet end of the heater 1 and the biological wastewater collection tank 7; a first pneumatic ball valve 11 and a one-way valve 12 are provided between the air outlet end of the heater 1 and the cooling tank 3; a first temperature sensor 9 and a second temperature sensor 10 are respectively provided at the air inlet end and the air outlet end of the heater 1, and a third temperature sensor 14 is provided at the air outlet end of the cooler 2.

[0077] The system includes a first temperature sensor 9 monitoring the gas temperature before heating, a second temperature sensor 10 monitoring the gas temperature after heating, a third temperature sensor 14 monitoring the gas temperature after cooling, and a fourth regulating valve 309 and a third regulating valve 208 controlling the temperature of the cooling tank 3. A fourth temperature sensor 308 monitors the temperature of the cooling tank 3. A pressure sensor 301 monitors the pressure of the cooling tank 3. A level gauge 302 monitors the liquid level in the cooling tank 3. A stirring mechanism 306 is installed at the bottom of the cooling tank 3 to ensure thorough and uniform mixing of the gas and solution.

[0078] The pipeline from the first temperature sensor 9 to the one-way valve 12 has a slope, and the second temperature sensor 10 is slightly higher than the first temperature sensor 9. The exhaust gas has a certain humidity, and water droplets will be generated during the heating process. This water needs to be returned to the biological wastewater collection tank 7 to increase the exhaust gas heating rate. The first temperature sensor 10 is slightly higher than the one-way valve 12, allowing the condensate generated during cooling to be discharged into the cooling tank 3. The one-way valve 12 prevents the gas in the cooling tank 3 from flowing back to the heater 1.

[0079] The functions of the first regulating valve 6, the second regulating valve 106, the third regulating valve 208, and the fourth regulating valve 309 are to achieve precise control of the process by changing the flow rate of the fluid. The first regulating valve 6 controls the amount of exhaust gas entering the heater 1, the second regulating valve 106 controls the amount of steam entering the heater 1, and the third regulating valve 208 controls the amount of chilled water entering the cooler 2.

[0080] The first pneumatic ball valve 11, the second pneumatic ball valve 108, the third pneumatic ball valve 206, the fourth pneumatic ball valve 303, the fifth pneumatic ball valve 307, and the sixth pneumatic ball valve 310 are control components used for cutting off, distributing, and changing the flow direction of the medium.

[0081] The working principle of this utility model is as follows:

[0082] When biological wastewater needs to be deactivated, the biological wastewater in the biological wastewater collection tank 7 is transferred to the biological wastewater deactivation tank 4 by pump 5 for high-temperature deactivation treatment. After treatment, it is discharged to the next-level sewage treatment system for further treatment.

[0083] The waste gas in the biological wastewater collection tank 7 is heated by heater 1, cooled by cooling tank 3 and cooler 2, and filtered by filter 13 before being discharged.

[0084] After the exhaust gas is heated, its temperature is monitored by the second temperature sensor 10. When the temperature of the first temperature sensor 9 is lower than the standard for gas discharge, the opening of the first regulating valve 6 is reduced to decrease the amount of gas entering the heater 1, and the opening of the second regulating valve 106 is increased to increase the amount of steam entering the gas and improve the heating rate of the gas.

[0085] When the exhaust gas temperature reaches the required level, the first pneumatic ball valve 11 is opened, allowing the exhaust gas to enter the cooling tank 3. The tank contains a certain amount of solution. During exhaust gas cooling, the stirring mechanism 306 is activated, and chilled water enters the jacket for cooling. The temperature is monitored by the fourth temperature sensor 308. Simultaneously, the sixth pneumatic ball valve 310 is opened, and the exhaust gas is further cooled by the cooler 2. The cooled exhaust gas then enters the filter 13 for filtration and discharge. The temperature of the cooled exhaust gas is monitored by the third temperature sensor 14, and the temperature should meet the plant temperature requirements. The third regulating valve 208 and the fourth regulating valve 309 control the flow rate of chilled water to regulate the cooling temperature of the exhaust gas.

[0086] The liquid level in cooling tank 3 is monitored by level gauge 302. When the liquid in the tank reaches a certain level, the fifth pneumatic ball valve 307 is opened to discharge a certain amount of solution.

[0087] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0088] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. An emptying system for a biological wastewater collection tank, characterized in that, Includes heater (1), cooler (2), cooling tank (3), biological wastewater inactivation tank and filter (13); The bottom of the biological wastewater inactivation tank (4) is connected to the bottom of the biological wastewater collection tank (7) for high-temperature inactivation treatment of biological wastewater; The air inlet of the heater (1) is connected to the top of the biological wastewater collection tank (7), and the heater (1) is used to heat the exhaust gas discharged from the biological wastewater collection tank (7). The air inlet of the cooling tank (3) is connected to the air outlet of the heater (1). The cooling tank (3) is used to cool the heated exhaust gas. The cooling tank (3) contains a disinfection solution for neutralizing harmful gases. The air inlet of the cooler (2) is connected to the air outlet of the cooling tank (3), and the exhaust gas discharged from the cooling tank (3) is further cooled by the cooler (2). The inlet of the filter (13) is connected to the outlet of the cooler (2), and the filter (13) is used to filter the exhaust gas cooled by the cooler (2).

2. The evacuation system for a biological wastewater collection tank according to claim 1, characterized in that, The heater (1) includes a heater housing (105), a first fixed tube sheet (103), and a first heat exchange tube (104); The first heat exchange tube (104) is fixedly installed inside the heater housing (105) by the first fixed tube sheet (103), and the heater housing (105) has a first gas inlet (101) and a first gas outlet (102) at both ends; The exhaust gas discharged from the biological wastewater collection tank (7) enters the heater (1) through the first gas inlet (101), is heated by the first heat exchange tube (104), and is discharged from the first gas outlet (102) to the cooling tank (3).

3. The evacuation system for a biological wastewater collection tank according to claim 2, characterized in that, The heater (1) also includes a second regulating valve (106), a second pneumatic ball valve (108), and a drain valve (109); The heater housing (105) is provided with a steam inlet pipe for heating the first heat exchange tube (104), and the second regulating valve (106) is installed on the steam inlet pipe; The heater housing (105) has a condensate outlet pipe at its bottom, and the second pneumatic ball valve (108) and the drain valve (109) are sequentially arranged on the condensate outlet pipe.

4. The evacuation system for a biological wastewater collection tank according to claim 1, characterized in that, The cooling tank (3) includes a tank body and a jacket disposed outside the tank body; The gas outlet of the heater (1) is connected to the gas inlet pipe of the tank, and the gas outlet pipe of the tank is connected to the inlet of the cooler (2). The tank contains a disinfection solution. The jacket is connected to a chilled water inlet pipe and a chilled water outlet pipe. A fourth regulating valve (309) is installed on the chilled water inlet pipe, and a fourth pneumatic ball valve (303) is installed on the chilled water outlet pipe.

5. The evacuation system for a biological wastewater collection tank according to claim 4, characterized in that, The gas inlet pipe is connected to a bubble ring (304) at one end inside the tank, and the bubble ring (304) has pores (305) evenly distributed on it. A stirring mechanism (306) is provided at the bottom of the tank.

6. The evacuation system for a biological wastewater collection tank according to claim 4, characterized in that, The tank body has a tank cover equipped with a pressure sensor (301) and a level gauge (302), and a fourth temperature sensor (308) is provided at the bottom of the tank body; The tank body is provided with a drain pipe at the bottom, a fifth pneumatic ball valve (307) is provided on the drain pipe, and a sixth pneumatic ball valve (310) is provided on the gas outlet pipe.

7. The evacuation system for a biological wastewater collection tank according to claim 1, characterized in that, The cooler (2) includes a cooler shell (205), a second fixed tube sheet (203), and a second heat exchange tube (204); The second heat exchange tube (204) is fixedly installed inside the cooler shell (205) by the second fixed tube sheet (203), and the cooler shell (205) has a second gas inlet (201) and a second gas outlet (202) at both ends; The exhaust gas, after being cooled and disinfected by the cooling tank (3), enters the cooler (2) through the second gas inlet (201), and after being cooled by the second heat exchange tube (204), it is discharged from the second gas outlet (202).

8. The evacuation system for a biological wastewater collection tank according to claim 7, characterized in that, The cooler (2) also includes a third regulating valve (208) and a third pneumatic ball valve (206); The cooler housing (205) is provided with a chilled water inlet pipe for cooling the second heat exchange tube (204), and the third regulating valve (208) is installed on the chilled water inlet pipe; The cooler housing (205) is provided with a chilled water outlet pipe for cooling the second heat exchange tube (204), and the third pneumatic ball valve (206) is installed on the chilled water outlet pipe; The cooler (2) is vertically installed on the cooling tank (3), and the condensate generated after the exhaust gas is cooled flows back to the cooling tank (3) through the second gas inlet (201).

9. The evacuation system for a biological wastewater collection tank according to claim 1, characterized in that, It also includes a filter (13), which is connected to the outlet of the cooler (2). The exhaust gas cooled by the cooler (2) is filtered by the filter (13) and then discharged.

10. The evacuation system for a biological wastewater collection tank according to claim 1, characterized in that, A first regulating valve (6) is provided between the air inlet end of the heater (1) and the biological wastewater collection tank (7); A first pneumatic ball valve (11) and a one-way valve (12) are provided between the outlet of the heater (1) and the cooling tank (3); The heater (1) is equipped with a first temperature sensor (9) and a second temperature sensor (10) at its inlet and outlet ends, respectively, and the cooler (2) is equipped with a third temperature sensor (14) at its outlet end.

Images