Treatment system for residual liquid and waste gas generated after tank car cleaning

Abstract

The utility model discloses a treatment system for residual liquid and waste gas after cleaning of a tank car, which comprises a base for supporting the tank car; the air pipe is communicated with an air inlet of the tank car; the gas collecting hood is communicated with a gas phase valve of the tank car and is respectively provided with an unorganized waste gas branch pipe, a low-concentration waste gas branch pipe, a high-concentration waste gas branch pipe and an acidic waste gas branch pipe; the cooling and dehumidifying unit is communicated with the unorganized waste gas branch pipe and the low-concentration waste gas branch pipe; the cryogenic dehumidification unit is communicated with the high-concentration waste gas branch pipe and the cryogenic recovery device; the alkali washing unit is communicated with the acid waste gas branch pipe and the cooling and dehumidifying unit; and the tail gas treatment device is communicated with the cooling and dehumidifying unit and the cryogenic recovery device. By means of the unorganized waste gas branch pipe, the low-concentration waste gas branch pipe, the high-concentration waste gas branch pipe and the acid waste gas branch pipe which are arranged on the gas collecting hood, tank trucks containing different chemical medium types are cleaned and then subjected to tail gas dehumidification and cooling pretreatment, then tail gas aftertreatment and up-to-standard emission are conducted, the range of treatment media is wide, and tail gas treatment meets the environment-friendly standard.

Description

Technical Field

[0001] This utility model relates to the field of residual liquid and waste gas treatment technology, and in particular to a treatment system for residual liquid and waste gas after tank truck cleaning. Background Technology

[0002] Tanker trucks are widely used in logistics, hazardous materials transportation and other industries. They are special vehicles equipped with enclosed metal tanks and are used to transport liquids, gases or powders, such as oil tankers and liquefied gas tankers.

[0003] When tank trucks are being refilled or repaired, the interior of the tank trucks must be replaced and cleaned. This process generates waste gas. Since there are many types of chemical media, the waste gas generated is diverse and varies greatly in properties. Existing waste gas treatment devices are generally unable to meet the requirements for treating a variety of waste gases.

[0004] Therefore, the existing tank truck exhaust gas treatment system needs to be improved. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects in the existing technology and provide a treatment system for residual liquid and exhaust gas after tank truck cleaning. Through the unorganized exhaust gas branch pipe, low-concentration exhaust gas branch pipe, high-concentration exhaust gas branch pipe and acidic exhaust gas branch pipe set in the gas collection hood, the exhaust gas of tank trucks carrying different types of chemical media is pre-treated by dehumidification and cooling, and then the exhaust gas is post-treated to meet the emission standards, thus achieving a wide range of treatment media and exhaust gas treatment that meets environmental protection standards.

[0006] To achieve the above-mentioned technical effects, the technical solution of this utility model is: a system for treating residual liquid and exhaust gas after tank truck cleaning, comprising:

[0007] The base supports the tanker truck;

[0008] The air duct is connected to the air inlet of the tanker truck;

[0009] The gas collection hood is connected to the gas phase valve of the tanker truck and is respectively equipped with branch pipes for unorganized waste gas, low-concentration waste gas, high-concentration waste gas and acidic waste gas.

[0010] The cooling and dehumidification unit is connected to the branch pipe for unorganized waste gas and the branch pipe for low-concentration waste gas.

[0011] The cryogenic dehumidification unit is connected to the high-concentration waste gas branch pipe and the cryogenic recovery device;

[0012] The alkaline washing unit is connected to the acidic waste gas branch pipe and the cooling and dehumidification unit;

[0013] The exhaust gas treatment device is connected to the cooling and dehumidification unit and the cryogenic recovery device.

[0014] A preferred technical solution is that the cooling and dehumidification unit includes an air inlet main pipe, a first condensation and demisting tower, a first cooling and dehumidification heat exchanger, a first centrifugal fan, and an exhaust main pipe connected in sequence. The air inlet main pipe is connected to the branch pipes for unorganized waste gas and low-concentration waste gas, and the exhaust main pipe is connected to the exhaust gas treatment device.

[0015] A preferred technical solution is that the cryogenic dehumidification unit includes a cryogenic air inlet main pipe, a second condensation and demisting tower, a second cooling and dehumidification heat exchanger, a second centrifugal fan, and a cryogenic exhaust main pipe connected in sequence. The cryogenic air inlet main pipe is connected to a high-concentration waste gas branch pipe, and the cryogenic exhaust main pipe is connected to a cryogenic recovery device.

[0016] A preferred technical solution is that the alkaline washing unit includes an acidic air inlet main pipe, an alkaline washing spray tower, a third centrifugal fan, and an acidic exhaust main pipe connected in sequence. The acidic air inlet main pipe is connected to the acidic air inlet main pipe, and the acidic exhaust main pipe is connected to the air inlet main pipe of the cooling and dehumidification unit.

[0017] A preferred technical solution is that the exhaust gas treatment device includes a heating section and a catalytic oxidation section arranged sequentially from the air inlet to the exhaust outlet.

[0018] A preferred technical solution further includes a cleaning medium source connected to the tanker truck's feed valve, the cleaning medium source including nitrogen and steam.

[0019] A preferred technical solution is that the unloading port of the tanker truck is connected to a waste liquid collection tank.

[0020] A preferred technical solution is that the drain outlet of the cryogenic recovery device is connected to the waste liquid collection tank.

[0021] The system for treating residual liquid and exhaust gas after tanker cleaning is reasonable. Through the unorganized exhaust gas branch pipes, low-concentration exhaust gas branch pipes, high-concentration exhaust gas branch pipes, and acidic exhaust gas branch pipes set in the gas collection hood, the exhaust gas of tankers carrying different types of chemical media is pre-treated by dehumidification and cooling, and then the exhaust gas is post-treated to meet emission standards, thus achieving a wide range of treated media and exhaust gas treatment that meets environmental protection standards. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the tank truck cleaning residual liquid and exhaust gas treatment system of this utility model;

[0023] Figure 2 This is a schematic diagram of another embodiment of the treatment of residual liquid and exhaust gas after tanker cleaning according to this utility model.

[0024] In the diagram: 1. Gas collection hood; 2. Cooling and dehumidification unit; 3. Cryogenic dehumidification unit; 4. Alkaline washing unit; 5. Exhaust gas treatment device; 10. Tanker truck; 11. Branch pipe for unorganized waste gas; 12. Branch pipe for low-concentration waste gas; 13. Branch pipe for high-concentration waste gas; 14. Branch pipe for acidic waste gas; 20. Main inlet pipe; 21. First condensation and demisting tower; 22. First cooling and dehumidification heat exchanger; 23. First centrifugal fan; 24. Main exhaust pipe; 30. Deep... 31. Cold air inlet main; 32. Second condensation and demisting tower; 33. Second cooling and dehumidifying heat exchanger; 34. Second centrifugal fan; 35. Cryogenic exhaust main; 46. Cryogenic recovery device; 47. Acidic air inlet main; 48. Alkali washing spray tower; 49. Third centrifugal fan; 40. Acidic exhaust main; 51. Heating section; 52. Catalytic oxidation section; 100. Waste liquid collection tank; 511. First heating section; 512. Second heating section. Detailed Implementation

[0025] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0026] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] like Figures 1-2 As shown, the residual liquid and waste gas treatment system after tank truck cleaning of this utility model includes a base, air duct, gas collection hood 1, cooling and dehumidification unit 2, cryogenic dehumidification unit 3, alkaline washing unit 4, and exhaust gas treatment device 5. The base supports the tank truck 10; the air duct is connected to the air inlet of the tank truck 10; the gas collection hood 1 is connected to the gas phase valve of the tank truck 10 and is respectively equipped with an unorganized waste gas branch pipe 11, a low-concentration waste gas branch pipe 12, a high-concentration waste gas branch pipe 13, and an acidic waste gas branch pipe 14; the cooling and dehumidification unit 2 is connected to the unorganized waste gas branch pipe 11 and the low-concentration waste gas branch pipe 12; the cryogenic dehumidification unit 3 is connected to the high-concentration waste gas branch pipe 13 and the cryogenic recovery device 35; the alkaline washing unit 4 is connected to the acidic waste gas branch pipe 14 and the cooling and dehumidification unit 2; and the exhaust gas treatment device 5 is connected to the cooling and dehumidification unit 2 and the cryogenic recovery device 3.

[0028] Through the unorganized waste gas branch pipe 11, low-concentration waste gas branch pipe 12, high-concentration waste gas branch pipe 13 and acidic waste gas branch pipe 14 set in the gas collection hood 1, the exhaust gas of tank trucks carrying different types of chemical media is pre-treated by dehumidification and cooling after cleaning, and then the exhaust gas is post-treated to meet emission standards, thus achieving a wide range of treatment media and exhaust gas treatment that meets environmental protection standards.

[0029] It also includes a cleaning medium source connected to the feed valve of tank truck 10, which includes nitrogen and steam. The discharge port of tank truck 10 is connected to a waste liquid collection tank 100, effectively collecting the residual liquid in the tank truck after cleaning. Furthermore, the discharge port of the cryogenic recovery device 35 is connected to the waste liquid collection tank 100, effectively treating the residual liquid and waste gas separately, ensuring the safe storage, resource utilization, and zero pollution of the residual liquid; and also ensuring that the waste gas meets emission standards, is explosion-proof, and reduces carbon emissions.

[0030] like Figure 1 As shown, in some embodiments, the treatment system for residual liquid and exhaust gas after cleaning of the novel tanker truck is a single unit.

[0031] like Figure 2 As shown, in some other embodiments, the novel tanker truck cleaning residual liquid and exhaust gas treatment system is configured in two groups.

[0032] The cooling and dehumidification unit 2 includes an inlet main pipe 20, a first condensing and demisting tower 21, a first cooling and dehumidifying heat exchanger 22, a first centrifugal fan 23, and an exhaust main pipe 24 connected in sequence. The inlet main pipe 20 is connected to the branch pipes 11 for fugitive emissions and 12 for low-concentration emissions, and the exhaust main pipe 24 is connected to the exhaust gas treatment device 5. The first condensing and demisting tower 21 includes a bottom air inlet and a top air outlet. Its side wall is also provided with a condensate inlet and a condensate outlet. The condensate inlet includes a top wall inlet and a middle inlet, such as... Figure 1 and 2 The diagram uses dots to indicate that the first condensing demister 21 includes an upper condensing section and a lower condensing section arranged along a plumb line, achieving sufficient condensation of fugitive waste gas. Furthermore, the model of the first condensing demister 21 is HQ / LT-2413-2 (Wuxi Huiquan Weiye Environmental Protection Technology Co., Ltd.), the model of the first cooling and dehumidifying heat exchanger 22 is HQ / LT-2413-5 (Wuxi Huiquan Weiye Environmental Protection Technology Co., Ltd.), and the model of the first centrifugal fan 23 is FTY-035DS.

[0033] Furthermore, the cryogenic dehumidification unit 3 includes a cryogenic inlet main 30, a second condensation demister 31, a second cooling and dehumidification heat exchanger 32, a second centrifugal fan 33, and a cryogenic exhaust main 34 connected in sequence. The cryogenic inlet main 30 is connected to the high-concentration waste gas branch pipe 13, and the cryogenic exhaust main 34 is connected to the cryogenic recovery device 35. Furthermore, the second condensation demister 31 is model HQ / LT-2413-1 (Wuxi Huiquan Weiye Environmental Protection Technology Co., Ltd.), the second cooling and dehumidification heat exchanger 32 is model HQ / LT-2413-4 (Wuxi Huiquan Weiye Environmental Protection Technology Co., Ltd.), the second centrifugal fan 33 is model FTY-035DS, and the cryogenic recovery device 35 is model BMCVR800.

[0034] Furthermore, the alkaline washing unit 4 includes an acidic air inlet main 40, an alkaline washing spray tower 41, a third centrifugal fan 42, and an acidic exhaust main 43 connected in sequence. The acidic air inlet main 40 is connected to the acidic air inlet main 14, and the acidic exhaust main 40 is connected to the air inlet main 20 of the cooling and dehumidification unit 2. The alkaline washing spray tower 41 is model HQ / LT-2413-3 (Wuxi Huiquan Weiye Environmental Protection Technology Co., Ltd.), and the third centrifugal fan 42 is model FTY-035DS.

[0035] The exhaust gas treatment device 5 includes a heating section 51 and a catalytic oxidation section 52 arranged sequentially from the air inlet to the exhaust outlet. Further, the heating section 51 includes a first heating section 511 and a second heating section 512 connected in series; the footprint of the device can be flexibly adjusted, and it can also be configured for stepped heating to make the gas heated more evenly and save energy. The first heating section 511 and the second heating section 512 have identical structures. The temperature of the first heating section 511 is controlled at 355~365℃, and the temperature of the second heating section 512 is controlled at 375~385℃. The catalytic oxidation section 52 is provided with catalyst plates stacked sequentially along the exhaust direction to achieve sufficient catalytic oxidation of the exhaust gas, thereby meeting emission standards.

[0036] Working principle: Depending on the type of tank truck being cleaned, different valves in the exhaust branch pipes are manually opened. The centrifugal fan reduces the pressure in different units and branch pipes, thereby allowing the exhaust gas from the tank truck cleaning to be discharged for pretreatment and then catalytic oxidation treatment to meet emission standards before being discharged.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A system for treating residual liquid and exhaust gas after tank truck cleaning, characterized in that, include: The base supports the tanker truck; The air duct is connected to the air inlet of the tanker truck; The gas collection hood is connected to the gas phase valve of the tanker truck and is respectively equipped with branch pipes for unorganized waste gas, low-concentration waste gas, high-concentration waste gas and acidic waste gas. The cooling and dehumidification unit is connected to the branch pipe for unorganized waste gas and the branch pipe for low-concentration waste gas. The cryogenic dehumidification unit is connected to the high-concentration waste gas branch pipe and the cryogenic recovery device; The alkaline washing unit is connected to the acidic waste gas branch pipe and the cooling and dehumidification unit; The exhaust gas treatment device is connected to the cooling and dehumidification unit and the cryogenic recovery device.

2. The system for treating residual liquid and exhaust gas after tanker truck cleaning according to claim 1, characterized in that, The cooling and dehumidification unit includes an air inlet main pipe, a first condensation and demisting tower, a first cooling and dehumidification heat exchanger, a first centrifugal fan, and an exhaust main pipe connected in sequence. The air inlet main pipe is connected to the fugitive exhaust gas branch pipe and the low-concentration exhaust gas branch pipe, and the exhaust main pipe is connected to the exhaust gas treatment device.

3. The system for treating residual liquid and waste gas after tanker truck cleaning according to claim 1 or 2, characterized in that, The cryogenic dehumidification unit includes a cryogenic air inlet main pipe, a second condensation and demisting tower, a second cooling and dehumidification heat exchanger, a second centrifugal fan, and a cryogenic exhaust main pipe connected in sequence. The cryogenic air inlet main pipe is connected to a high-concentration waste gas branch pipe, and the cryogenic exhaust main pipe is connected to a cryogenic recovery device.

4. The system for treating residual liquid and exhaust gas after tanker truck cleaning according to claim 2, characterized in that, The alkaline washing unit includes an acidic air inlet main pipe, an alkaline washing spray tower, a third centrifugal fan, and an acidic exhaust main pipe connected in sequence. The acidic air inlet main pipe is connected to the acidic air inlet main pipe, and the acidic exhaust main pipe is connected to the air inlet main pipe of the cooling and dehumidification unit.

5. The system for treating residual liquid and exhaust gas after tanker truck cleaning according to claim 1, characterized in that, The exhaust gas treatment device includes a heating section and a catalytic oxidation section arranged sequentially from the air inlet to the exhaust outlet.

6. The system for treating residual liquid and exhaust gas after tanker truck cleaning according to claim 1, characterized in that, It also includes a cleaning medium source connected to the tanker truck's feed valve, the cleaning medium source including nitrogen and steam.

7. The system for treating residual liquid and waste gas after tanker truck cleaning according to claim 1, characterized in that, The tanker truck's unloading port is connected to a waste liquid collection tank.

8. The system for treating residual liquid and waste gas after tanker truck cleaning according to claim 7, characterized in that, The drain outlet of the cryogenic recovery device is connected to the waste liquid collection tank.

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