Propellant waste gas treatment device

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to a propellant waste gas treatment device which comprises a movable support frame, a spray adsorption tower, a neutralizing liquid tank, a circulating pump, a flow meter and a gas-liquid separator, the neutralizing liquid tank, the circulating pump and the gas-liquid separator are arranged on the movable support frame, more than two spray adsorption towers are positioned on the upper surface of the neutralizing liquid tank, and the bottoms of the spray adsorption towers are communicated with the neutralizing liquid tank; the propellant waste gas enters the gas-liquid separator through the gas path pipeline, the waste gas treated by the gas-liquid separator enters the spraying adsorption tower through the gas path pipeline, and the waste gas treated by the spraying adsorption tower is discharged through the gas path pipeline; neutralizing liquid in the neutralizing liquid tank is connected with the spraying adsorption tower through a liquid pipeline by using a circulating pump. According to the device, harmful components in the waste gas are absorbed in the spray adsorption tower by using a neutralization solution, and the gas which is treated to reach the standard is discharged; the device also has the advantages of small size, mobility, high treatment efficiency and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to exhaust treatment technical field especially is related to a propellant exhaust treatment device. BACKGROUND

[0002] N2O4 (dinitrogen tetroxide) / MMH (methyl hydrazine) is usually used as oxidant / fuel combination for liquid attitude control rocket engine propellant, since N2O4 and MMH are both highly corrosive and toxic substances, and most have carcinogenic effect. Attitude control rocket engine inevitably emits propellant exhaust during propellant transfer, filling, and leakage, which is highly concentrated and toxic, harmful to human health and causes environmental pollution.

[0003] Therefore, it is essential to provide a propellant exhaust treatment device. SUMMARY

[0004] To solve the above problems, the purpose of the utility model is to provide a propellant exhaust treatment device, which uses neutralizing liquid to neutralize and absorb harmful components in the exhaust gas in the spray adsorption tower, and discharges the treated gas to ensure the safety and health of the personnel on the job site. The propellant exhaust treatment device provided by the utility model has the advantages of small size, portability, high treatment efficiency, etc.

[0005] The purpose of the utility model can be achieved by the following technical solutions:

[0006] The utility model provides a propellant exhaust treatment device, which comprises a mobile support frame, a spray adsorption tower, a neutralizing liquid tank, a circulating pump, a flow meter and a gas-liquid separator.

[0007] The neutralizing liquid tank, the circulating pump and the gas-liquid separator are arranged on the mobile support frame, the spray adsorption tower is arranged on the upper surface of the neutralizing liquid tank, and the bottom is in communication with the neutralizing liquid tank.

[0008] The propellant exhaust gas enters the gas-liquid separator through the gas pipeline, the exhaust gas treated by the gas-liquid separator enters the spray adsorption tower through the gas pipeline, and the exhaust gas treated by the spray adsorption tower is discharged through the gas pipeline.

[0009] The neutralizing liquid in the neutralizing liquid tank is connected with the spray adsorption tower through the liquid pipeline by the circulating pump.

[0010] The spray adsorption tower is provided with two or more, and is connected in series along the direction of the propellant exhaust gas in the gas pipeline, and is connected in parallel along the direction of the neutralizing liquid in the liquid pipeline.

[0011] In one embodiment of the utility model, in the spray absorption tower, propellant waste gas (from bottom to top) and neutralizing liquid (from top to bottom) are in countercurrent contact in the filler, neutralization and absorption reaction occurs to remove harmful components in waste gas, through the series operation of multiple spray absorption towers, the treatment effect is effectively improved.

[0012] The propellant waste gas enters the gas-liquid separator from the propellant waste gas inlet, and the propellant liquid carried by the propellant waste gas is removed by centrifugal separation principle.

[0013] In one embodiment of the utility model, the spray absorption tower is provided with two, including first spray absorption tower and second spray absorption tower.

[0014] In one embodiment of the utility model, a first flow meter is arranged between the circulating pump and the first spray absorption tower, and a second flow meter is arranged between the circulating pump and the second spray absorption tower.

[0015] The first flow meter and the second flow meter are used for controlling the flow of neutralizing liquid into the first spray absorption tower and the second spray absorption tower, so that the first spray absorption tower and the second spray absorption tower can operate under the best working condition.

[0016] In one embodiment of the utility model, the top of the spray absorption tower is provided with a neutralizing liquid inlet and a spray absorption tower propellant waste gas outlet, and the bottom of the spray absorption tower is provided with a spray absorption tower propeller waste gas inlet.

[0017] The top of the inner cavity of the spray absorption tower is provided with a spray head connected with the neutralizing liquid inlet (the neutralizing liquid is uniformly sprayed on the filler from the spray head), the bottom of the spray head is filled with the filler, and the bottom of the filler is provided with a porous plate air distribution assembly (for better guiding the propellant waste gas entering the bottom of the spray absorption tower into the filler).

[0018] The spray absorption tower propeller waste gas inlet is arranged below the porous plate air distribution assembly.

[0019] In one embodiment of the utility model, the spray head is a solid cone nozzle (the solid cone nozzle has very uniform impact force distribution on the entire disc-shaped jet surface; the special rotating blade inside the solid cone nozzle accurately guides the liquid entering the nozzle to the nozzle rotating cavity center, and very uniform liquid distribution is obtained).

[0020] In one embodiment of the utility model, the porous plate air distribution assembly is selected from one of a porous ceramic plate, a porous metal plate or a porous glass plate.

[0021] In one embodiment of the utility model, the filler is SS316 wire mesh type structured packing.

[0022] In one embodiment of the present application, the specific surface area of the filler is 700 m 2 / m 3 , and the porosity is 85%.

[0023] In one embodiment of the present application, the top of the neutralizing liquid tank is provided with a dosing port, the bottom is provided with a vent port and a liquid outlet connected with the circulating pump.

[0024] In one embodiment of the present application, the circulating pump is a magnetic pump (which can realize non-contact synchronous transmission of power, convert the dynamic sealing structure prone to leakage into a static sealing structure with zero leakage, and greatly reduce the risk of neutralizing liquid leakage).

[0025] Compared with the prior art, the present application has the following beneficial effects:

[0026] (1) The propellant waste gas treatment device of the present application can realize the treatment of propellant waste gas by the cooperation of the spray adsorption tower and the neutralizing liquid; in the spray absorption tower, the propellant waste gas (from bottom to top) and the neutralizing liquid (from top to bottom) are in countercurrent contact in the filler, and a neutralization and absorption reaction occurs to remove harmful components in the waste gas; through the series operation of the multi-stage spray adsorption tower, the treatment effect can also be effectively improved.

[0027] (2) The propellant waste gas treatment device of the present application can ensure the safety and health of the personnel at the work site by using the neutralizing liquid to neutralize and absorb the harmful components in the waste gas in the spray adsorption tower and discharge the gas after treatment.

[0028] (3) The propellant waste gas treatment device provided by the present application has the advantages of small size, mobility, high treatment efficiency, etc. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 is a structural schematic view of the propellant waste gas treatment device provided by the present application;

[0030] Fig. 2 is a structural schematic view of the spray adsorption tower;

[0031] Fig. 3 is a flow schematic view of the propellant waste gas treatment device provided by the present application;

[0032] The figure is marked: 1, mobile support frame; 2, first spray adsorption tower; 3, second spray adsorption tower; 4, first flow meter; 5, second flow meter; 6, circulating pump; 7, neutralizing liquid tank; 8, gas-liquid separator; 9, propellant waste gas inlet; 10, propellant waste gas outlet; 21, neutralizing liquid inlet; 22, spray head; 23, filler; 24, porous plate air distribution assembly; 25, spray adsorption tower propellant waste gas inlet; 26, spray adsorption tower propellant waste gas outlet. DETAILED DESCRIPTION

[0033] The utility model will be described in detail below in combination with the drawings and specific examples.

[0034] In the description of the utility model, unless there is definite and limited provision and limitation, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0035] In the utility model, unless there is definite and limited provision and limitation, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] In the description of the embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0037] In the following examples, unless otherwise specified, the components used (such as mobile support frame, spray adsorption tower, flow meter, circulating pump, neutralizing liquid tank, gas-liquid separator, spray head, filler, porous plate air distribution assembly, etc.) are conventional components in the art, as long as they can realize the corresponding functions.

[0038] Embodiment 1

[0039] The embodiment provides a propellant exhaust gas treatment device, which comprises a mobile support frame 1, a spray adsorption tower, a neutralizing liquid tank 7, a circulating pump 6, a flow meter and a gas-liquid separator 8. Figs. 1-3 As shown in the figure, the neutralizing liquid tank 7, the circulating pump 6 and the gas-liquid separator 8 are arranged on the mobile support frame 1, the spray adsorption tower is arranged on the upper surface of the neutralizing liquid tank 7 and is in communication with the neutralizing liquid tank 7 at the bottom, the propellant exhaust gas enters the gas-liquid separator 8 through a gas pipeline, the exhaust gas treated by the gas-liquid separator 8 enters the spray adsorption tower through a gas pipeline, and the exhaust gas treated by the spray adsorption tower is discharged through a gas pipeline; the neutralizing liquid in the neutralizing liquid tank 7 is connected with the spray adsorption tower through a liquid pipeline by the circulating pump 6; the spray adsorption tower is provided with two or more than two, and the spray adsorption towers are connected in series along the running direction of the propellant exhaust gas in the gas pipeline; and the spray adsorption towers are connected in parallel along the running direction of the neutralizing liquid in the liquid pipeline.

[0040] In the embodiment, the propellant exhaust gas enters the gas-liquid separator 8 through a propellant exhaust gas inlet 9, and the propellant liquid brought by the propellant exhaust gas is removed by using the centrifugal separation principle;

[0041] In the spray adsorption tower, the propellant exhaust gas (from bottom to top) and the neutralizing liquid (from top to bottom) are reversely contacted in the filler 23 to generate a neutralization and absorption reaction so as to remove the harmful components in the exhaust gas; and the treatment effect is effectively improved through the series operation of the multi-stage spray adsorption tower.

[0042] In the embodiment, the spray adsorption tower is provided with two, including a first spray adsorption tower 2 and a second spray adsorption tower 3, a first flow meter 4 is arranged between the circulating pump 6 and the first spray adsorption tower 2, and a second flow meter 5 is arranged between the circulating pump 6 and the second spray adsorption tower 3; wherein the first flow meter 4 and the second flow meter 5 are used for controlling the flow of the neutralizing liquid into the first spray adsorption tower 2 and the second spray adsorption tower 3, so as to ensure that the first spray adsorption tower 2 and the second spray adsorption tower 3 operate under the best working condition.

[0043] Further, the top of the spray adsorption tower is provided with a neutralizing liquid inlet 21 and a spray adsorption tower propellant exhaust gas outlet 26, the bottom of the spray adsorption tower is provided with a spray adsorption tower propellant exhaust gas inlet 25, the top of the inner cavity of the spray adsorption tower is provided with a spray head 22 connected with the neutralizing liquid inlet 21 (the neutralizing liquid is uniformly sprayed on the filler 23 from the spray head 22), the bottom of the spray head 22 is filled with the filler 23, the bottom of the filler 23 is provided with a perforated plate air distribution assembly 24 (used for better guiding the propellant exhaust gas entering the bottom of the spray adsorption tower into the filler 23), and the spray adsorption tower propellant exhaust gas inlet 25 is arranged below the perforated plate air distribution assembly 24.

[0044] Further, the spray head 22 is a solid cone nozzle (the solid cone nozzle has very uniform strike force distribution on the whole disc-shaped spray surface; the special rotating blade inside the solid cone nozzle precisely guides the liquid flow entering the nozzle to the center of the nozzle rotating cavity, obtaining very uniform liquid distribution).

[0045] Further, the porous plate air distribution assembly 24 is selected from one of a porous ceramic plate, a porous metal plate or a porous glass plate.

[0046] Further, the filler 23 is SS316 wire mesh structured filler with a specific surface area of 700 m 2 / m 3 and a porosity of 85%.

[0047] Further, the top of the neutralizing liquid tank 7 is provided with a dosing port, the bottom is provided with a discharge port and a liquid outlet connected with the circulating pump 6.

[0048] Further, the circulating pump 6 is a magnetic force pump (can realize power non-contact synchronous transmission, convert the dynamic sealing structure prone to leakage into a zero-leakage static sealing structure, greatly reduce the risk of neutralizing liquid leakage).

[0049] When the device is used, the neutralizing liquid is first added to the dosing port of the neutralizing liquid tank 7.

[0050] When working, the propellant exhaust gas enters the gas-liquid separator 8 from the propellant exhaust gas inlet 9, and the propellant liquid brought out by the propellant exhaust gas is removed by using the centrifugal separation principle, and the separated propellant exhaust gas passes through the first spray adsorption tower 2 and the second spray adsorption tower 3 in turn, in the spray adsorption tower (the first spray adsorption tower 2 and the second spray adsorption tower 3), the neutralizing liquid in the neutralizing liquid tank 7 is sprayed downward by the spray head 22 of the spray adsorption tower (the first spray adsorption tower 2 and the second spray adsorption tower 3) under the action of the circulating pump 6, the propellant exhaust gas is distributed after passing through the porous plate air distribution assembly 24, and is continuously contacted with the neutralizing liquid in countercurrent through the structured filler 23, and chemical reaction occurs, so that the pollutants are absorbed, and the treatment of the propellant exhaust gas is completed.

[0051] The above description of the embodiments is for the convenience of those skilled in the art to understand and use the utility model. Those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described herein to other embodiments without creative labor. Therefore, the utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art according to the interpretation of the utility model should be within the protection scope of the utility model.

Claims

1. A propellant exhaust gas treatment device, characterized by, The mobile support frame (1), the spray adsorption tower, the neutralizing liquid tank (7), the circulating pump (6), the flow meter and the gas-liquid separator (8) are included. The neutralizing liquid tank (7), the circulating pump (6) and the gas-liquid separator (8) are arranged on the mobile support frame (1), and the spray adsorption tower is arranged on the upper surface of the neutralizing liquid tank (7) and is in communication with the neutralizing liquid tank (7) at the bottom. The propellant exhaust gas enters the gas-liquid separator (8) through the gas pipeline, and the exhaust gas treated by the gas-liquid separator (8) enters the spray adsorption tower through the gas pipeline, and the exhaust gas treated by the spray adsorption tower is discharged through the gas pipeline. The neutralizing liquid in the neutralizing liquid tank (7) is connected with the spray adsorption tower through the liquid pipeline by the circulating pump (6). The spray adsorption tower is provided with two or more than two, and the spray adsorption towers are connected in series along the direction of the propellant exhaust gas in the gas pipeline, and the spray adsorption towers are connected in parallel along the direction of the neutralizing liquid in the liquid pipeline.

2. A propellant exhaust treatment device according to claim 1, characterised in that The spray adsorption tower is provided with two, including the first spray adsorption tower (2) and the second spray adsorption tower (3).

3. A propellant exhaust treatment device according to claim 2, wherein The first flow meter (4) is arranged between the circulating pump (6) and the first spray adsorption tower (2), and the second flow meter (5) is arranged between the circulating pump (6) and the second spray adsorption tower (3).

4. The propellant exhaust treatment device of claim 1, wherein The top of the spray adsorption tower is provided with a neutralizing liquid inlet (21) and a spray adsorption tower propellant exhaust gas outlet (26), and the bottom of the spray adsorption tower is provided with a spray adsorption tower propellant exhaust gas inlet (25). The top of the inner cavity of the spray adsorption tower is provided with a spray head (22) connected with the neutralizing liquid inlet (21), the bottom of the spray head (22) is filled with a filler (23), and the bottom of the filler (23) is provided with a porous plate gas distribution assembly (24). The spray adsorption tower propellant exhaust gas inlet (25) is arranged below the porous plate gas distribution assembly (24).

5. A propellant exhaust treatment device according to claim 4, wherein The spray head (22) is a solid cone nozzle.

6. A propellant exhaust treatment device according to claim 4, wherein The porous plate gas distribution assembly (24) is selected from one of a porous ceramic plate, a porous metal plate or a porous glass plate.

7. A propellant exhaust treatment device according to claim 4, wherein The filler (23) is an SS316 wire mesh structured packing.

8. A propellant exhaust treatment device according to claim 7, characterised in that The specific surface area of the filler (23) is 700 m 2 / m 3 , and the porosity is 85%.

9. The propellant exhaust treatment device of claim 1, wherein The top of the neutralizing liquid tank (7) is provided with a dosing port, the bottom is provided with a vent port and a liquid outlet connected with the circulating pump (6).

10. The propellant exhaust treatment device of claim 1, wherein The circulating pump (6) is a magnetic pump.

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