Soda production safety monitoring device

Abstract

The present application relates to soda production technical field, and disclose a kind of soda production safety monitoring device, the device includes leakage monitoring cover and ammonia gas collection tank.Leakage monitoring cover is fixed in equipment flange by sealing cover, sealing buckle, built-in double-channel diaphragm pump drive exhaust pipe and return gas pipe form gas circulation, exhaust pipe is equipped with ammonia gas detector to monitor leakage in real time, return gas pipe is controlled by flow regulating mechanism to maintain micro-vacuum in cover, prevent ammonia gas leakage, ammonia gas collection tank, ammonia gas is refined after entering gas elbow gas stone, and water flow is driven to rise by center tube gas lift effect, and is secondarily absorbed by top rain board, realize ammonia gas efficient dissolution.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soda ash production, and particularly relates to a safety monitoring device for soda ash production. BACKGROUND

[0002] Soda ash, i.e. sodium carbonate, is an important chemical raw material, and industrial production mainly has two processes of ammonia soda method and combined soda method. The ammonia soda method takes salt, limestone and ammonia gas as raw materials, and generates soda ash through a series of chemical reactions. The combined soda method combines soda ash production and ammonium chloride production. In the ammonia soda method and the combined soda method, equipment related to ammonia gas, such as ammonia absorption tower, ammonia evaporation tower and ammonia salt water pipeline, is connected through flanges. Since ammonia gas has strong corrosiveness and volatility, long-term contact will cause the aging, cracking or swelling of the flange gasket, and the flange gasket will lose the sealing performance, resulting in ammonia gas leakage. Ammonia gas has a strong irritating odor, and after leakage, white smoke is formed, which pollutes the surrounding air and affects the life of the factory and the surrounding residents.

[0003] In view of the above and the prior art, the present application has the following defects: the traditional monitoring device mainly depends on a single fixed sensor, which can only detect the gas concentration in a local area, and the gas flow depends on natural diffusion, and cannot actively extract the gas near the leakage point. When a small amount of leakage occurs at the flange connection, it takes a long time for the gas to diffuse to the sensor, which easily leads to delayed alarm, and even missed detection due to the initial concentration not meeting the standard. At the same time, it is also difficult to collect and process the leaked ammonia gas in time, which leads to pollution caused by ammonia gas when it is found. SUMMARY

[0004] The technical problem to be solved by the present application is that the prior art cannot actively extract the gas near the leakage point, which leads to delayed alarm. Therefore, the present application provides a safety monitoring device for soda ash production.

[0005] In order to achieve the above object, the following technical scheme is adopted: A soda production safety monitoring device, comprising: a leakage monitoring cover and an ammonia gas collection tank, the leakage monitoring cover comprises a sealing cover, the sealing cover is fixedly connected with a sealing buckle through bolts, the sealing cover and the sealing buckle are fixed at the connecting flange of the soda production equipment, for wrapping the equipment flange joint gap, forming a local sealed space to monitor whether ammonia gas leakage occurs. A double-channel diaphragm pump is arranged in the sealing cover, the double-channel diaphragm pump serves as the power core of gas circulation, one side of the double-channel diaphragm pump is provided with an exhaust pipe, one end of the exhaust pipe is provided with a first air suction port for sucking the gas in the sealing cover, the other end of the exhaust pipe is provided with a second air exhaust port for discharging the sucked gas to the ammonia gas collection tank, the exhaust pipe is used for sucking the gas in the leakage monitoring cover, an ammonia gas detector is arranged at the exhaust pipe, which can detect whether the gas flowing through contains ammonia gas in real time, and an alarm is sent immediately when ammonia gas is detected, prompting ammonia gas leakage. The other side of the double-channel diaphragm pump is provided with a gas return pipe, one end of the gas return pipe is provided with the second air exhaust port for returning the gas to the sealing cover, the other end of the gas return pipe is provided with a second air suction port for sucking the gas from the ammonia gas collection tank, one side of the gas return pipe is provided with a flow adjusting mechanism, the flow adjusting mechanism is used for adjusting the single pumping capacity of the gas return pipe, the amount of gas returned to the sealing cover is controlled, a slight vacuum state is formed in the sealing cover, and ammonia gas leakage is prevented.

[0006] The bottom of the ammonia gas collection tank is fixedly connected with a bottom partition plate for supporting the internal structure and separating the space, the center pipe is fixedly connected above the bottom partition plate, the top of the center pipe is fixedly connected with a top rainwater baffle, a plurality of through holes are formed in the top rainwater baffle, the water flow can be uniformly dispersed, and the rising gas flow can be secondarily absorbed ammonia gas. The ammonia gas collection tank is fixedly connected with a water inlet elbow on one side for injecting the absorption liquid into the tank, the ammonia gas collection tank is provided with an air inlet elbow at the bottom, an air inlet is formed at one end of the air inlet elbow, the first air exhaust port is communicated with the air inlet through a pipeline for receiving the ammonia-containing gas discharged from the leakage monitoring cover, the other end of the air inlet elbow is communicated with the center pipe, the top of the bottom partition plate is provided with an air outlet elbow, an air outlet is formed at one end of the air outlet elbow, the second air suction port is communicated with the air outlet through a pipeline for sucking the treated gas back to the leakage monitoring cover to form a cycle, and a water outlet is further formed in the top of the bottom partition plate for discharging the water solution in which ammonia gas is absorbed.

[0007] Further, the double-channel diaphragm pump is provided with a driving motor on one side, the output shaft of the driving motor is fixedly connected with a crankshaft, the crankshaft is rotatably connected with an eccentric wheel, one side of the eccentric wheel is rotatably connected with a first connecting rod, the first connecting rod is fixedly connected with a first diaphragm at the tail end, the other side of the eccentric wheel is rotatably connected with a second connecting rod, and the second connecting rod is fixedly connected with a second diaphragm at the tail end. The driving motor drives the crankshaft to rotate, the first connecting rod and the second connecting rod reciprocate through the eccentric wheel, thereby periodically changing the volume of the two side cavities of the first diaphragm and the second diaphragm, realizing the suction and discharge of the gas, and providing power for the gas circulation.

[0008] Further, a first one-way valve is arranged in the exhaust pipe near the first air extraction port to prevent gas backflow into the sealing cover, and a second one-way valve is arranged in the exhaust pipe near the first exhaust port to prevent gas backflow from the first exhaust port to the exhaust pipe, ensuring one-way flow of gas in the exhaust pipe.

[0009] Further, a third one-way valve is arranged in the return gas pipe near the second exhaust port to prevent gas backflow from the second exhaust port to the return gas pipe, and a fourth one-way valve is arranged in the return gas pipe near the second air extraction port to prevent gas backflow from the second air extraction port to the return gas pipe, ensuring one-way flow of gas in the return gas pipe.

[0010] Further, an annular flow channel is arranged in the sealing cover and the sealing buckle, and a partition plate is arranged in the sealing cover, which separates the annular flow channel into two sections, separating the air extraction path and the exhaust path to prevent gas mixing, the first air extraction port is located on one side of the partition plate for extracting gas in the sealing cover, and the second exhaust port is located on the other side of the partition plate for returning gas to the sealing cover.

[0011] Further, the flow regulating mechanism includes a flow regulating pipe, which is connected between the third one-way valve and the fourth one-way valve, and by adjusting the flow capacity of this section of pipe, the control of the single pumping capacity of the return gas pipe is achieved.

[0012] Further, the flow regulating mechanism includes a flow regulating pipe, one end of which is connected to the outside of the leakage monitoring cover, and the other end is connected to the return gas pipe, one end of the flow regulating pipe is rotatably connected with an adjusting knob, the adjusting knob is fixedly connected with a threaded rod, a telescopic pipe is inserted into the flow regulating pipe, one end of the telescopic pipe is fixedly connected with a movable nut, the threaded rod and the movable nut are connected through threaded transmission, one end of the telescopic pipe is provided with an adjusting piston, the adjusting piston is slidably connected with the flow regulating pipe, and a piston limiting ring is arranged on one side of the adjusting piston, and the piston limiting ring is fixedly connected with the flow regulating pipe. Rotating the adjusting knob drives the threaded rod to rotate, and moving the telescopic pipe and the adjusting piston through the movable nut changes the movable range of the adjusting piston, thereby adjusting the air volume pumped out by the second diaphragm in one cycle, and realizing accurate adjustment of the air volume of the return gas pipe.

[0013] Further, the water inlet elbow is connected below the bottom partition plate, and the top end of the water inlet elbow is provided with a water inlet, which is 10-20 cm lower than the top deluge plate, to ensure that the injected water first fills the bottom space and then rises to the top deluge plate through the center pipe, forming a uniform water spraying effect.

[0014] Further, the air inlet elbow is provided with an air stone at one end, which is located at the lower part of the center pipe, and can refine the ammonia-containing gas entering the center pipe into fine bubbles, increasing the contact area between the gas and the water and improving the absorption efficiency of ammonia gas.

[0015] Further, the upper end opening of the exhaust elbow is higher than the water outlet, preventing water from entering the exhaust elbow during water drainage, and a waterproof cover is arranged at the upper end opening of the exhaust elbow to prevent water from entering the exhaust elbow and ensure smooth circulation of the gas.

[0016] Technical effects and advantages of the present application:

[0017] In the present application, through the linkage structure of the double-channel diaphragm pump, the annular flow channel and the ammonia gas detector, the first diaphragm and the second diaphragm are driven by the crankshaft connecting rod mechanism to reciprocate periodically, so as to realize active extraction and circulation of the gas in the sealing cover. Unlike the traditional passive monitoring which relies on natural diffusion of the gas, the present scheme actively extracts the gas through the exhaust pipe and accurately supplements the gas through the return pipe, forming a local gas circulation loop, ensuring that the leaked gas at the flange joint gap is captured in real time, greatly shortening the monitoring response time, and avoiding ammonia gas leakage into the external atmosphere. BRIEF DESCRIPTION OF DRAWINGS

[0018] The disclosure of the present application will be described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present application. In the drawings, the same reference numerals are used to refer to the same parts:

[0019] Figure 1 A schematic view of the leakage monitoring cover structure of the present application is shown in the figure.

[0020] Figure 2 A schematic view of the ammonia gas collection tank structure of the present application is shown in the figure.

[0021] Figure 3 A schematic view of the leakage monitoring cover cross-sectional structure of the present application is shown in the figure.

[0022] Figure 4 A schematic view of the double-channel diaphragm pump structure of the present application is shown in the figure.

[0023] Figure 5 A schematic view of the internal structure of the double-channel diaphragm pump of the present application is shown in the figure.

[0024] Figure 6 A schematic view of the Figure 5 An enlarged structure schematic view of position A in the present application is shown in the figure.

[0025] Figure 7 A schematic view of the ammonia gas collection tank cross-sectional structure of the present application is shown in the figure.

[0026] Legend: 1, leakage monitoring cover; 2, sealing cover; 3, sealing buckle; 4, annular flow channel; 5, double-channel diaphragm pump; 501, driving motor; 502, crankshaft; 503, eccentric wheel; 504, first connecting rod; 505, first diaphragm; 506, second connecting rod; 507, second diaphragm; 6, exhaust pipe; 601, first one-way valve; 602, second one-way valve; 7, first suction port; 8, first exhaust port; 9, ammonia gas detector; 10, return gas pipe; 1001, third one-way valve; 1002, fourth one-way valve; 11, second exhaust port; 12, second suction port; 13, flow regulating mechanism; 1301, flow regulating pipe; 1302, adjusting knob; 1303, threaded rod; 1304, telescopic pipe; 1305, movable nut; 1306, adjusting piston; 1307, piston limiting ring; 14, partition plate; 15, ammonia gas collection tank; 16, bottom partition; 17, center pipe; 18, top rain plate; 19, water inlet elbow; 20, water inlet; 21, air inlet elbow; 22, air inlet; 23, air stone; 24, exhaust elbow; 25, exhaust port; 26, waterproof cover; 27, drain port. DETAILED DESCRIPTION

[0027] It is easy to understand that those skilled in the art can propose various structural modes and implementation modes that can be replaced with each other without changing the essential spirit of the present application. Therefore, the following detailed description and the accompanying drawings are only exemplary descriptions of the technical solutions of the present application, and should not be regarded as the whole or as a limitation or restriction on the technical solutions of the present application.

[0028] Reference Figures 1-7 As shown in the drawings, the present application provides a technical solution: a soda production safety monitoring device, a leakage monitoring cover 1 includes a sealing cover 2, the sealing cover 2 is fixedly connected with a sealing buckle 3 through bolts, the sealing cover 2 and the sealing buckle 3 are fixed at the connecting flange of the soda production equipment, used to wrap the equipment flange joint gap, forming a local sealed space to monitor whether ammonia gas leakage occurs at this place. The annular flow channel 4 is arranged in the sealing cover 2 and the sealing buckle 3, the partition plate 14 is arranged in the sealing cover 2, the partition plate 14 divides the annular flow channel 4 into two sections, so that the suction path and the exhaust path are separated, so that the gas forms a cycle, the first suction port 7 is located on one side of the partition plate 14, used to extract the gas in the sealing cover 2, the second exhaust port 11 is located on the other side of the partition plate 14, used to return the gas to the sealing cover 2.

[0029] The double-channel diaphragm pump 5 is arranged in the sealing cover 2. One side of the double-channel diaphragm pump 5 is provided with a driving motor 501. The output shaft of the driving motor 501 is fixedly connected with a crankshaft 502. The crankshaft 502 is rotatably connected with an eccentric wheel 503. One side of the eccentric wheel 503 is rotatably connected with a first connecting rod 504. The first connecting rod 504 is fixedly connected with a first diaphragm 505 at the tail end. The other side of the eccentric wheel 503 is rotatably connected with a second connecting rod 506. The second connecting rod 506 is fixedly connected with a second diaphragm 507 at the tail end. The driving motor 501 drives the crankshaft 502 to rotate. The first connecting rod 504 and the second connecting rod 506 are driven to reciprocate through the eccentric wheel 503. Thus, the first diaphragm 505 and the second diaphragm 507 are driven to periodically change the volume of the two side cavities. The gas is inhaled and discharged. The power for the gas circulation is provided. The double-channel diaphragm pump 5 serves as the power core of the gas circulation.

[0030] One side of the double-channel diaphragm pump 5 is provided with an exhaust pipe 6. One end of the exhaust pipe 6 is provided with a first gas suction port 7. The first gas suction port 7 is used for sucking the gas in the sealing cover 2. The other end of the exhaust pipe 6 is provided with a first gas discharge port 8. The first gas discharge port 8 is used for discharging the sucked gas to the ammonia gas collecting tank 15. The exhaust pipe 6 is used for sucking the gas in the leakage monitoring cover 1. An ammonia gas detector 9 is arranged at the exhaust pipe 6. The ammonia gas detector 9 can detect whether the gas flowing through contains ammonia gas in real time. When the ammonia gas is detected, an alarm is immediately sent out. The ammonia gas leakage is prompted. One side of the exhaust pipe 6 close to the first gas suction port 7 is provided with a first one-way valve 601. The first one-way valve 601 is used for preventing the gas from flowing back to the sealing cover 1. One side of the exhaust pipe 6 close to the first gas discharge port 8 is provided with a second one-way valve 602. The second one-way valve 602 is used for preventing the gas from flowing back to the exhaust pipe 6 from the first gas discharge port 8. The gas is ensured to flow in one direction in the exhaust pipe 6.

[0031] The other side of the double-channel diaphragm pump 5 is provided with a return gas pipe 10, one end of the return gas pipe 10 is provided with a second exhaust port 11 for returning gas into the sealing cover 2, the other end of the return gas pipe 10 is provided with a second gas suction port 12 for extracting gas from the ammonia gas collecting tank 15, one side of the return gas pipe 10 is provided with a flow adjusting mechanism 13, the flow adjusting mechanism 13 includes a flow adjusting pipe 1301, one end of the flow adjusting pipe 1301 is connected to the outside of the leakage monitoring cover 1, the other end of the flow adjusting pipe 1301 is connected with the return gas pipe 10, one end of the flow adjusting pipe 1301 is rotatably connected with an adjusting knob 1302, the adjusting knob 1302 is fixedly connected with a threaded rod 1303, a telescopic pipe 1304 is inserted into the flow adjusting pipe 1301, one end of the telescopic pipe 1304 is fixedly connected with a movable nut 1305, the threaded rod 1303 and the movable nut 1305 are connected through thread transmission, one end of the telescopic pipe 1304 is provided with an adjusting piston 1306, the adjusting piston 1306 is slidably connected with the flow adjusting pipe 1301, one side of the adjusting piston 1306 is provided with a piston limiting ring 1307, the piston limiting ring 1307 is fixedly connected with the flow adjusting pipe 1301. Rotating the adjusting knob 1302 drives the threaded rod 1303 to rotate, moving the telescopic pipe 1304 and the adjusting piston 1306 through the movable nut 1305, changing the movable range of the adjusting piston 1306, thereby adjusting the amount of air pumped out by the second diaphragm 507 in one cycle, realizing accurate adjustment of the gas return amount of the return gas pipe 10, adjusting the single-pump gas amount of the return gas pipe 10, controlling the amount of gas returned to the sealing cover 1, forming a slight vacuum state in the sealing cover 1, preventing ammonia gas leakage. One side of the return gas pipe 10 close to the second exhaust port 11 is provided with a third one-way valve 1001 for preventing gas from flowing back to the return gas pipe 10 from the second exhaust port 11, one side of the return gas pipe 10 close to the second gas suction port 12 is provided with a fourth one-way valve 1002 for preventing gas from flowing back to the return gas pipe 10 from the second gas suction port 12, ensuring one-way flow of gas in the return gas pipe 10.

[0032] Referring to Figure 7As shown, in the present embodiment: the ammonia collection tank 15 is fixedly connected with a bottom partition plate 16 at the bottom, which is used to support the internal structure and separate the space, and the center pipe 17 is fixedly connected above the bottom partition plate 16, and the top rain plate 18 is fixedly connected at the top of the center pipe 17, and a plurality of through holes are formed in the top rain plate 18, which can uniformly disperse the water flow and absorb ammonia gas again for the rising gas flow. The ammonia collection tank 15 is fixedly connected with a water inlet elbow 19 on one side, which is used to inject absorbing liquid water into the tank, and the water inlet elbow 19 is connected below the bottom partition plate 16, and the top end of the water inlet elbow 19 is provided with a water inlet 20, which is 10-20 cm lower than the lower surface of the top rain plate 18, so as to ensure that the injected water can first fill the bottom space, and then rise to the top rain plate 18 through the center pipe 17, thereby forming a uniform water spraying effect. The ammonia collection tank 15 is provided with an air inlet elbow 21 at the bottom, and the air inlet elbow 21 is provided with an air inlet 22 at one end, and the first exhaust port 8 is communicated with the air inlet 22 through a pipeline, which is used to receive the ammonia-containing gas discharged from the leakage monitoring cover 1, and the other end of the air inlet elbow 21 is communicated into the center pipe 17, and the air inlet elbow 21 is provided with an air stone 23 at one end, which is located at the lower part of the center pipe 17, so as to finely divide the ammonia-containing gas entering the center pipe 17 into small bubbles, thereby increasing the contact area between the gas and the water and improving the ammonia gas absorption efficiency. The exhaust elbow 24 is arranged above the bottom partition plate 16, and the exhaust elbow 24 is provided with an exhaust port 25 at one end, and the second air outlet 12 is communicated with the exhaust port 25 through a pipeline, which is used to draw the treated gas back into the leakage monitoring cover 1 to form a cycle, and the upper end opening of the exhaust elbow 24 is higher than the drain port 27, so as to prevent water from entering the exhaust elbow 24 during drainage, and the upper end opening of the exhaust elbow 24 is provided with a waterproof cover 26, which is used to prevent foreign matters from entering the exhaust elbow 24 and ensure the smooth circulation of the gas. The drain port 27 is further arranged above the bottom partition plate 16, which is used to discharge the water solution in which the ammonia gas is absorbed.

[0033] Working principle: when using a soda production safety monitoring device, first, the sealing cover 2 and the sealing buckle 3 are fixed on the connecting flange of the soda production equipment by bolts, which wraps the flange joint gap and forms a local sealed space for monitoring whether ammonia gas leakage occurs in the place. The annular flow channel 4 is arranged in the sealing cover 2 and the sealing buckle 3, and the partition plate 14 in the sealing cover 2 divides the annular flow channel 4 into two sections, so that the air extraction path and the air exhaust path are separated, avoiding gas mixing, the first air outlet 7 is located on one side of the partition plate 14, which is used to extract the gas in the sealing cover 2, and the second air outlet 11 is located on the other side of the partition plate 14, which is used to return the gas to the sealing cover 2. When in use, the sealing cover 2 and the sealing buckle 3 are buckled outside the connecting flange of the equipment that may be contaminated and leaked, such as the connecting flange outside the ammonia absorption tower or the carbonation tower, and at the same time, the first exhaust port 8 and the air inlet 22 are connected by a hose, the second air outlet 12 and the exhaust port 25 are connected, the water inlet 20 and the water storage tank are connected, and the drain port 27 and the ammonia water tank are connected.

[0034] The double-channel diaphragm pump 5 arranged in the sealing cover 2 is used as the power core of the gas circulation. The double-channel diaphragm pump 5 is provided with an exhaust pipe 6 on one side. The first air suction port 7 at one end of the exhaust pipe 6 is used to suck the gas in the sealing cover 2, and the first exhaust port 8 at the other end is used to exhaust the sucked gas to the ammonia gas collecting tank 15. The first one-way valve 601 is arranged in the exhaust pipe 6 close to the first air suction port 7, which is used to prevent the gas from flowing back to the sealing cover 2. The second one-way valve 602 is arranged in the exhaust pipe 6 close to the first exhaust port 8, which is used to prevent the gas from flowing back to the exhaust pipe 6 from the first exhaust port 8, so as to ensure the one-way flow of the gas in the exhaust pipe 6. The ammonia gas detector 9 arranged at the exhaust pipe 6 can detect whether the gas flowing therethrough contains ammonia gas in real time, and immediately issue an alarm when ammonia gas is detected, prompting ammonia gas leakage. The double-channel diaphragm pump 5 is provided with a gas return pipe 10 on the other side. The second exhaust port 11 at one end of the gas return pipe 10 is used to return the gas to the sealing cover 2, and the second air suction port 12 at the other end is used to suck the gas from the ammonia gas collecting tank 15. The third one-way valve 1001 is arranged in the gas return pipe 10 close to the second exhaust port 11, which is used to prevent the gas from flowing back to the gas return pipe 10 from the second exhaust port 11. The fourth one-way valve 1002 is arranged in the gas return pipe 10 close to the second air suction port 12, which is used to prevent the gas from flowing back to the gas return pipe 10 from the second air suction port 12, so as to ensure the one-way flow of the gas in the gas return pipe 10. The flow adjusting mechanism 13 on one side of the gas return pipe 10 is used to adjust the single pumping capacity of the gas return pipe 10. By controlling the amount of gas returned to the sealing cover 2, a slight vacuum state is formed in the sealing cover 2, so as to prevent ammonia gas from leaking out.

[0035] The output shaft of the driving motor 501 on one side of the double-channel diaphragm pump 5 is fixedly connected with a crankshaft 502. The crankshaft 502 is rotatably connected with an eccentric wheel 503. The eccentric wheel 503 is rotatably connected with a first connecting rod 504 on one side. The first connecting rod 504 is fixedly connected with a first diaphragm 505 at the tail end. The eccentric wheel 503 is rotatably connected with a second connecting rod 506 on the other side. The second connecting rod 506 is fixedly connected with a second diaphragm 507 at the tail end. When the double-channel diaphragm pump 5 is started, the driving motor 501 drives the crankshaft 502 to rotate. The first connecting rod 504 and the second connecting rod 506 are driven to reciprocate through the eccentric wheel 503, so as to periodically change the volume of the two side cavities of the first diaphragm 505 and the second diaphragm 507. The air suction and exhaust are realized under the cooperation of the one-way valve, so as to provide power for the gas circulation, and make the airflow form a cycle.

[0036] The flow adjusting mechanism 13 comprises a flow adjusting pipe 1301 located between the third one-way valve 1001 and the fourth one-way valve 1002, one end of which is connected to the outside of the leakage monitoring cover 1 and the other end is connected with the return gas pipe 10, a rotatingly connected adjusting knob 1302 is fixedly connected with a threaded rod 1303, a telescopic pipe 1304 inserted into the flow adjusting pipe 1301 is fixedly connected with a movable nut 1305, the threaded rod 1303 is in threaded transmission connection with the movable nut 1305, an adjusting piston 1306 arranged at one end of the telescopic pipe 1304 is in sliding connection with the flow adjusting pipe 1301, and a piston limiting ring 1307 at one side is fixedly connected with the flow adjusting pipe 1301. Rotating the adjusting knob 1302 drives the threaded rod 1303 to rotate, and the telescopic pipe 1304 and the adjusting piston 1306 are moved through the movable nut 1305, so that the movable range of the adjusting piston 1306 is changed, thereby adjusting the amount of air pumped out by the second diaphragm 507 in one cycle and realizing accurate adjustment of the return gas amount of the return gas pipe 10, so that the amount of air returned to the leakage monitoring cover 1 is less than the amount of air extracted, thereby making the leakage monitoring cover 1 present a slight vacuum state, preventing ammonia gas from leaking, and at the same time, the gas pressure in the ammonia gas collecting tank 15 can be slightly increased, which is helpful for dissolving ammonia gas in water and improving the ammonia gas absorption capacity.

[0037] The bottom partition plate 16 is fixedly connected to the bottom of the ammonia gas collecting tank 15 and is used for supporting the internal structure and separating the space, the top of the center pipe 17 fixedly connected to the top is fixedly connected with the top rain shower plate 18, a large number of through holes are arranged on the top rain shower plate 18, which can uniformly disperse the water flow and absorb ammonia gas again for the rising gas flow. The water inlet elbow pipe 19 at one side of the ammonia gas collecting tank 15 is used for injecting the absorption liquid into the tank, the water inlet elbow pipe 19 is connected to the lower side of the bottom partition plate 16, the water inlet 20 at the top is 10-20 cm lower than the lower surface of the top rain shower plate 18, which ensures that the injected water can first fill the bottom space and then rise to the top rain shower plate 18 through the center pipe 17, thereby forming a uniform water showering effect. The gas inlet 22 at one end of the gas inlet elbow pipe 21 arranged at the bottom is in communication with the first gas outlet 8 through a pipeline and is used for receiving the ammonia-containing gas discharged from the leakage monitoring cover 1, the other end of the gas inlet elbow pipe 21 is introduced into the center pipe 17, and the air stone 23 arranged at one end of the gas inlet elbow pipe 21 is located at the lower part of the center pipe 17, which can refine the ammonia-containing gas entering the center pipe 17 into small bubbles, increase the contact area between the gas and the water, and improve the ammonia gas absorption efficiency. The gas outlet 25 at one end of the gas outlet elbow pipe 24 arranged above the bottom partition plate 16 is in communication with the second gas outlet 12 through a pipeline and is used for drawing the treated gas back into the leakage monitoring cover 1 to form a cycle, the upper end opening of the gas outlet elbow pipe 24 is higher than the water outlet 27, which prevents water from entering the gas outlet elbow pipe 24 when draining, and a waterproof cover 26 is arranged at the opening, which is used for preventing water from entering the gas outlet elbow pipe 24 and ensuring the smooth circulation of the gas, and the water outlet 27 is arranged above the bottom partition plate 16 and is used for discharging the water solution in which ammonia gas is absorbed.

[0038] When ammonia gas leaks from the flange joint, the double-channel diaphragm pump 5 circulates the air flow, the ammonia gas detector 9 at the exhaust pipe 6 detects the ammonia gas first and sends an alarm, and the air containing ammonia gas is discharged from the first exhaust port 8, injected into the air inlet elbow 21 through the air inlet port 22, refined by the air stone 23 into small bubbles, rises in the central pipe 17, drives the water flow in the central pipe 17 to flow upward by the air lift principle, and then overflows from the upper end of the central pipe 17, disperses on the top sprinkler plate 18 and falls down, absorbs the ammonia gas in the air flow again, and then the water solution absorbing the ammonia gas flows out from the drain port 27 for collection, and the excess air is sucked back into the annular flow channel 4 from the exhaust port 25 to form a circulation. In this process, the ammonia gas in the bubbles rising in the central pipe 17 is fully contacted with the water, and the water falling from the top sprinkler plate 18 absorbs the ammonia gas again, realizing effective treatment of the leaked ammonia gas.

[0039] Through the organic combination of the above structure and principle, the device realizes real-time monitoring and alarm of ammonia gas leakage from the flange joint of the equipment in the soda production process and timely collection of the leaked ammonia gas, preventing environmental pollution.

[0040] The technical scope of the present application is not limited to the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical idea of the present application, and these modifications and changes should be within the protection scope of the present application.

Claims

1. A soda ash production safety monitoring device, characterized by, The utility model relates to a pure alkali production equipment leakage monitoring cover and ammonia gas collection tank, and the pure alkali production equipment leakage monitoring cover and ammonia gas collection tank are characterized by comprising a sealing cover, a sealing buckle is fixedly connected to the sealing cover through bolt fixing, the sealing cover and the sealing buckle are fixed at the connecting flange of pure alkali production equipment, a double -channel diaphragm pump is arranged in the sealing cover, one side of the double -channel diaphragm pump is provided with an exhaust pipe, one end of the exhaust pipe is provided with a first air suction port, the other end of the exhaust pipe is provided with a first exhaust port, the exhaust pipe is used for pumping out the gas in the leakage monitoring cover, an ammonia gas detector is arranged at the exhaust pipe, the other side of the double -channel diaphragm pump is provided with a return gas pipe, one end of the return gas pipe is provided with a second exhaust port, the other end of the return gas pipe is provided with a second air suction port, one side of the return gas pipe is provided with a flow regulating mechanism, and the flow regulating mechanism is used for adjusting the single -time pumping capacity of the return gas pipe. The bottom of the ammonia gas collection tank is fixedly connected with a bottom baffle, the top of the center pipe is fixedly connected with a top rainwater apron, a plurality of through holes are formed in the top rainwater apron, one side of the ammonia gas collection tank is fixedly connected with a water inlet elbow, the bottom of the ammonia gas collection tank is provided with a gas inlet elbow, one end of the gas inlet elbow is provided with a gas inlet, the first exhaust port is communicated with the gas inlet through a pipeline, the other end of the gas inlet elbow is communicated into the center pipe, the top of the bottom baffle is provided with a gas outlet elbow, one end of the gas outlet elbow is provided with a gas outlet, the second air suction port is communicated with the gas outlet through a pipeline, and the top of the bottom baffle is further provided with a drain hole. One side of the double -channel diaphragm pump is provided with a driving motor, the output shaft of the driving motor is fixedly connected with a crankshaft, the crankshaft is rotatably connected with an eccentric wheel, one side of the eccentric wheel is rotatably connected with a first connecting rod, the tail end of the first connecting rod is fixedly connected with a first diaphragm, the other side of the eccentric wheel is rotatably connected with a second connecting rod, and the tail end of the second connecting rod is fixedly connected with a second diaphragm. The sealing cover and the sealing buckle are provided with an annular flow channel, the sealing cover is provided with a partition sheet, the partition sheet divides the annular flow channel into two sections, the first air suction port is located on one side of the partition sheet, and the second exhaust port is located on the other side of the partition sheet. The flow regulating mechanism comprises a flow regulating pipe, one end of the flow regulating pipe is connected to the outside of the leakage monitoring cover, the other end of the flow regulating pipe is connected with the return gas pipe, one end of the flow regulating pipe is rotatably connected with an adjusting knob, the adjusting knob is fixedly connected with a threaded rod, a telescopic pipe is inserted into the flow regulating pipe, one end of the telescopic pipe is fixedly connected with a movable nut, the threaded rod and the movable nut are connected through thread transmission, one end of the telescopic pipe is provided with an adjusting piston, the adjusting piston is slidably connected with the flow regulating pipe, one side of the adjusting piston is provided with a piston limiting ring, and the piston limiting ring is fixedly connected with the flow regulating pipe. A first one-way valve is arranged in the exhaust pipe close to the first air suction port, and a second one-way valve is arranged in the exhaust pipe close to the first exhaust port.

2. The soda ash production safety monitoring device according to claim 1, characterized in that: A third one-way valve is arranged in the return gas pipe close to the second exhaust port, and a fourth one-way valve is arranged in the return gas pipe close to the second air suction port.

3. The soda ash production safety monitoring device according to claim 1, characterized in that: ​ 4. The soda ash production safety monitoring device according to claim 3, characterized in that: The flow regulating mechanism comprises a flow regulating pipe located between the third one-way valve and the fourth one-way valve.

5. The soda ash production safety monitoring device according to claim 1, characterized in that: The water inlet elbow is connected to the lower part of the bottom partition plate, and the top end of the water inlet elbow is provided with a water inlet opening which is 10-20 cm lower than the top deluge plate.

6. The soda ash production safety monitoring device according to claim 1, characterized in that: The air inlet elbow is provided with an air stone at one end, and the air stone is located at the lower part of the central pipe.

7. The soda ash production safety monitoring device of claim 1, wherein: The upper end opening of the air outlet elbow is higher than the water outlet, and the upper end opening of the air outlet elbow is provided with a waterproof cover.

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