Nitrogen trichloride blowdown device
By using check valves and foaming and anti-top components in the nitrogen trichloride sewage discharge device, the problem of pipeline blockage caused by lye backflow is solved, and the safe emission of nitrogen trichloride is achieved, the risk of explosion is avoided, and production safety is improved.
Patent Information
- Application Number
- CN202421820284.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-07-30
AI Technical Summary
During the nitrogen trichloride sewage discharge operation, the alkali liquid is prone to flow back to the bottom of the sewage discharge tank, resulting in the pipeline blockage, resulting in the enrichment of nitrogen trichloride and the risk of explosion.
The check valve and foam removal and anti-top components are adopted, including a liquid pooling funnel and a liquid dispersion pan to prevent backflow of alkali and ensure effective mixing and distribution of nitrogen trichloride and liquid alkali. The check valve prevents backflow, and the liquid pooling funnel and liquid dispersion pan ensure liquid distribution and reduce backflow of overflow.
It effectively prevents the lye from flowing backwards to block the pipeline, ensures the smooth operation of nitrogen trichloride discharge, avoids the risk of nitrogen trichloride enrichment and explosion, and improves production safety.
Smart Images
Figure CN223082168U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of nitrogen trichloride sewage discharge, and specifically discloses a nitrogen trichloride sewage discharge device. Background Art
[0002] When using the ion-exchange membrane method caustic soda process for chlor-alkali production, the saturated brine enters the electrolytic cell after purification and impurity removal, and direct current is passed through for electrolysis to obtain 32% sodium hydroxide solution, chlorine gas, hydrogen gas, and dilute brine. The high-temperature wet chlorine gas from the ion-exchange membrane electrolysis process first enters the chlorine gas scrubbing tower, makes countercurrent contact with the chlorine water to cool the chlorine gas, and at the same time the salt mist and impurities entrained by the chlorine gas are washed down. The chlorine gas leaving the tower is saturated by spraying pure water, pressurized by a pressurizing fan and enters a titanium cooler. After cooling in section I and section II, it enters a water mist collector to collect the water mist and then enters a packed drying tower for drying with 72%-92% concentrated sulfuric acid, and then enters a bubble cap tower for further drying with 98% concentrated sulfuric acid. The chlorine gas leaving the packed drying tower is collected by an acid mist collector to remove the acid mist, and then enters a chlorine gas compressor for pressurization. Through the chlorine gas distribution platform, it enters the chlorine gas liquefaction process all the way, is cooled by Freon in the liquefier, cools down and enters a gas-liquid separator. The gaseous chlorine together with the liquefaction tail gas enters the tail gas distribution platform to go to the waste gas treatment process and the high-purity hydrochloric acid process. The liquid chlorine flows by gravity to the liquid chlorine storage tank. The impurities in the chlorine gas together with nitrogen trichloride sink to the bottom of the gas-liquid separator and need to be regularly discharged into the sewage discharge tank, vaporized naturally and then analyzed for content, and then neutralized in a neutralization tank to prevent explosion after enrichment.
[0003] Among them, in the sewage discharge operation of nitrogen trichloride, first check that there is no pressure in the sewage discharge tank, and the valve from the sewage discharge tank to the neutralization tank is closed. Open the sewage discharge tank valve and the sewage discharge valve of the gas-liquid separator, and let the liquid chlorine flow into the sewage discharge tank until the frost surface at the bottom reaches 15 cm - 20 cm or the pressure in the sewage discharge tank is the same as the system pressure, and then close the sewage discharge valve of the gas-liquid separator. After the liquid chlorine in the sewage discharge tank is vaporized, the analyst opens the sampling valve to analyze the nitrogen trichloride content. After the analysis is completed, open the pipeline valve from the sewage discharge tank to the neutralization tank and the bottom valve of the sewage discharge tank, and use the chlorine gas vaporization pressure to press the dirt into the neutralization tank and neutralize it with about 15% alkali solution.
[0004] However, during the process of opening the valve in this operation, the alkali solution in the neutralization tank will flow back to the bottom of the sewage discharge tank, or when the neutralization is about to be completed and there is no pressure in the sewage discharge tank, the alkali solution will flow back into the sewage discharge tank, causing the pipeline from the bottom of the sewage discharge tank to the neutralization tank to be blocked, resulting in the inability to perform the sewage discharge operation next time, which will cause nitrogen trichloride to continuously accumulate in the gas-liquid separator. After accumulating to a certain amount, it can explode under conditions of vibration or light reaching the explosion conditions. Content of the Utility Model
[0005] In view of the above deficiencies of the prior art, the utility model provides a nitrogen trichloride sewage discharge device to solve the problem of the alkali solution flowing back into the sewage discharge tank.
[0006] To achieve the above object, the technical solution of the present utility model is as follows:
[0007] A nitrogen trichloride sewage discharge device includes a gas-liquid separator. The liquid discharge valve I at the liquid discharge port of the gas-liquid separator is connected to the liquid inlet valve I of a sewage discharge tank. The liquid discharge valve II of the sewage discharge tank is connected to the liquid inlet valve II of a neutralization tank, and the liquid inlet valve II is connected with a check valve. The check valve is connected to the first liquid inlet of the neutralization tank. A foam removal and anti-overflow component is arranged in the neutralization tank in cooperation with the liquid inlet. Through the setting of the check valve, the reverse flow and crystallization of the lye in the pipeline are prevented from blocking the pipeline, thereby ensuring the smooth progress of the nitrogen trichloride sewage discharge operation, avoiding the enrichment of nitrogen trichloride, and avoiding production accidents such as chlorine leakage and explosion. The setting of the foam removal and anti-overflow component can further reduce the backflow of the foamy lye into the first liquid inlet.
[0008] Preferably, the lower side wall of the neutralization tank is connected with a circulation pump through a pipeline; the outlet of the circulation pump is connected to the second liquid inlet on the top surface of the neutralization tank through a pipeline; the second liquid inlet is arranged in cooperation with the foam removal and anti-overflow component, which can ensure the neutralization effect.
[0009] Preferably, the center lines of the first liquid inlet and the second liquid inlet form an included angle with the center line of the neutralization tank, which is convenient for the setting of the foam removal and anti-overflow component.
[0010] Preferably, the foam removal and anti-overflow component includes a liquid collecting funnel fixedly arranged in the upper part of the neutralization tank; the upper open end of the liquid collecting funnel is arranged below the first liquid inlet and the second liquid inlet; the liquid collecting funnel is provided with a conical bottom; a liquid distribution plate is arranged below the open end of the conical bottom. The setting of the liquid collecting funnel can mix the nitrogen trichloride entering from the first liquid inlet and the lye entering from the second liquid inlet and then introduce them into the liquid distribution plate, ensuring the liquid distribution of the liquid distribution plate, ensuring the neutralization effect, and reducing the backflow of the foamy lye in the neutralization tank into the first liquid inlet.
[0011] Preferably, the liquid distribution plate is integrally arranged in a conical shell shape; the top end of the liquid distribution plate is arranged below the open end of the conical bottom of the liquid collecting funnel; the top surface of the liquid distribution plate is fixedly arranged on the inner top surface of the neutralization tank through a support rod; the outer side wall of the liquid collecting funnel is fixedly arranged on the support rod. The liquid distribution plate can distribute the liquid and further reduce the backflow of the foamy lye into the first liquid inlet.
[0012] Preferably, a plurality of liquid leakage holes are arranged near the edge of the liquid distribution plate, which is beneficial to the liquid distribution and neutralization.
[0013] The beneficial effects of the present utility model are as follows:
[0014] 1. Through the setting of the check valve, the reverse flow and crystallization of the lye in the pipeline are prevented from blocking the pipeline, thereby ensuring the smooth progress of the nitrogen trichloride sewage discharge operation, avoiding the enrichment of nitrogen trichloride, and avoiding production accidents such as chlorine leakage and explosion.
[0015] 2. The setting of the liquid collecting funnel can mix the nitrogen trichloride entering from the first liquid inlet and the liquid caustic soda entering from the second liquid inlet and then introduce them into the liquid separation tray, ensuring the distribution of the liquid by the liquid separation tray, ensuring the neutralization effect, and reducing the backflow of the foamy liquid caustic soda in the neutralization tank into the first liquid inlet. The liquid separation tray can distribute the liquid, further reducing the backflow of the foamy caustic soda into the first liquid inlet. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0017] Figure 1 is a schematic structural diagram of the present invention;
[0018] Figure 2 is a partially sectional structural diagram of the neutralization tank of the present invention;
[0019] Figure 3 is a sectional view of the neutralization tank of the present invention.
[0020] Description of the reference numerals:
[0021] 1 - gas - liquid separator, 2 - sewage tank, 3 - neutralization tank, 4 - circulation pump, 5 - liquid collecting funnel, 6 - liquid separation tray, 7 - support rod;
[0022] 101 - first liquid outlet valve; 201 - first liquid inlet valve, 202 - second liquid outlet valve; 301 - second liquid inlet valve, 302 - check valve, 303 - first liquid inlet, 304 - second liquid inlet; 601 - liquid leakage hole. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0024] As Figure 1As shown in the figure, a nitrogen trichloride sewage discharge device includes a gas-liquid separator 1. The liquid discharge valve 101 at the liquid outlet of the gas-liquid separator 1 is connected to the liquid inlet valve 201 of the sewage discharge tank 2. The liquid discharge valve 202 of the sewage discharge tank 2 is connected to the liquid inlet valve 301 of the neutralization tank 3. The liquid inlet valve 301 is connected with a check valve 302; the check valve 302 is connected to the first liquid inlet 303 of the neutralization tank 3; a circulation pump 4 is connected to the lower side wall of the neutralization tank 3 through a pipeline; the outlet of the circulation pump 4 is connected to the second liquid inlet 304 on the top surface of the neutralization tank 3 through a pipeline; through the setting of the check valve 302, the reverse flow and crystallization of the lye in the pipeline are prevented, thus ensuring the smooth progress of the nitrogen trichloride sewage discharge operation, avoiding the enrichment of nitrogen trichloride, and preventing production accidents such as chlorine leakage and explosion. The setting of the circulation pump 4 can ensure the neutralization effect.
[0025] As Figures 2 - 3 shown, a foam removal and anti-overflow component is arranged in the neutralization tank 3 in cooperation with the liquid inlet. The second liquid inlet 304 is arranged in cooperation with the foam removal and anti-overflow component. The center lines of the first liquid inlet 303 and the second liquid inlet 304 are arranged at an angle of 30° with the center line of the neutralization tank 3. This facilitates the setting of the foam removal and anti-overflow component and reduces the probability of the liquid overflowing and flowing back into the first liquid inlet.
[0026] In the above setting, the foam removal and anti-overflow component includes a liquid collecting funnel 5 fixedly arranged in the upper part of the neutralization tank 3; the upper open end of the liquid collecting funnel 5 is arranged below the first liquid inlet 303 and the second liquid inlet 304; the liquid collecting funnel 5 is provided with a conical bottom; a liquid distribution plate 6 is arranged below the open end of the conical bottom. The setting of the liquid collecting funnel 5 can mix the nitrogen trichloride entering from the first liquid inlet 303 and the lye entering from the second liquid inlet 304 and then introduce them into the liquid distribution plate 6, ensuring the distribution of the liquid by the liquid distribution plate 6, ensuring the neutralization effect, and reducing the reverse flow and overflow of the foam-containing lye in the neutralization tank 3 into the first liquid inlet 303. The liquid distribution plate 6 is integrally arranged in a conical shell shape; the top end of the liquid distribution plate 6 is arranged below the open end of the conical bottom of the liquid collecting funnel 5; the top surface of the liquid distribution plate 6 is fixedly arranged on the inner top surface of the neutralization tank 3 through a support rod 7; the outer side wall of the liquid collecting funnel 5 is fixedly arranged on the support rod 7. The liquid distribution plate 6 can distribute the liquid and further reduce the reverse flow of the foam-containing lye into the first liquid inlet 303. A number of liquid leakage holes 601 are arranged near the edge of the liquid distribution plate 6, which is beneficial to the distribution of the liquid and beneficial to neutralization.
[0027] Although the present utility model has been described in detail by referring to the accompanying drawings and in conjunction with the preferred embodiments, the present utility model is not limited thereto. Without departing from the spirit and essence of the present utility model, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present utility model, and these modifications or substitutions should all fall within the scope of the present utility model. / Any person skilled in the art within the technical scope disclosed by the present utility model can easily conceive of changes or substitutions, and all of them should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims
1. A nitrogen trichloride sewage discharge device, comprising a gas-liquid separator (1). A first liquid discharge valve (101) at the liquid outlet of the gas-liquid separator (1) is connected to a first liquid inlet valve (201) of a sewage discharge tank (2). A second liquid discharge valve (202) of the sewage discharge tank (2) is connected to a second liquid inlet valve (301) of a neutralization tank (3), characterized in that, The liquid inlet valve II (301) is connected with a check valve (302); the check valve (302) is connected with the first liquid inlet (303) of the neutralization tank (3); a foam removal and anti-overflow component is arranged in the neutralization tank (3) in cooperation with the liquid inlet.
2. The nitrogen trichloride sewage discharge device according to claim 1, characterized in that, The lower side wall of the neutralization tank (3) is connected with a circulation pump (4) through a pipeline; the outlet of the circulation pump (4) is connected with the second liquid inlet (304) on the top surface of the neutralization tank (3) through a pipeline; the second liquid inlet (304) is arranged in cooperation with the foam removal and anti-overflow component.
3. The nitrogen trichloride sewage discharge device according to claim 2, characterized in that, The center lines of the first liquid inlet (303) and the second liquid inlet (304) are arranged at an angle with the center line of the neutralization tank (3).
4. The nitrogen trichloride sewage discharge device according to claim 3, characterized in that, The foam removal and anti-overflow component includes a liquid collecting funnel (5) fixedly arranged in the upper part of the neutralization tank (3); the upper open end of the liquid collecting funnel (5) is arranged below the first liquid inlet (303) and the second liquid inlet (304); the liquid collecting funnel (5) is provided with a conical bottom; a liquid distribution plate (6) is arranged below the open end of the conical bottom.
5. The nitrogen trichloride sewage discharge device according to claim 4, characterized in that, The liquid distribution plate (6) is integrally arranged in a conical shell shape; the top end of the liquid distribution plate (6) is arranged below the open end of the conical bottom of the liquid collecting funnel (5); the top surface of the liquid distribution plate (6) is fixedly arranged on the inner top surface of the neutralization tank (3) through a support rod (7); the outer side wall of the liquid collecting funnel (5) is fixedly arranged on the support rod (7).
6. The nitrogen trichloride sewage discharge device according to claim 5, characterized in that, A plurality of liquid leakage holes (601) are arranged on the liquid distribution plate (6) near the edge.