Backflow prevention safety device
By designing the anti-backflow safety device and utilizing the combined structure of the quench tower, anti-backflow valve and separation tower, the problem of poor liquid gas separation and anti-backflow effects in the existing technology has been solved, and the efficient purification of synthetic ammonia and the reduction of waste have been achieved. .
Patent Information
- Application Number
- CN202420923025.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-04-28
AI Technical Summary
The existing anti-reflow safety valve cannot efficiently achieve liquid and gas separation, and at the same time it cannot effectively prevent reflow, resulting in serious waste of synthetic ammonia and other media.
Designed a kind of anti -reflow safety device, including the rapid cold tower, anti -return valve, and separation tower. By the cache room and activity room structure of the anti -flow valve, the efficient transportation of liquid and the dredging of the gas to prevent the return of the gas. Secondary separation to improve the purity and income of synthetic ammonia.
It achieves efficient purification of synthetic ammonia, reduces waste, improves safety and process stability, and achieves energy saving and consumption reduction.
Smart Images
Figure CN222384838U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of safety equipment, and in particular relates to a backflow prevention safety device. Background Art
[0002] In the production process of synthetic ammonia, synthetic ammonia refers to the direct synthesis of nitrogen and hydrogen under high temperature, high pressure and the presence of a catalyst. Ammonia is the main raw material for the fertilizer industry and basic organic chemical industry. The main reason for the alkaline environment in the preparation process is the unreacted ammonia. At present, for this process device, sulfuric acid is added to the quenching water to remove the unreacted ammonia. Generally, a segmented quenching tower is used to solve the problem. However, the synthetic ammonia produced by the current quenching device is seriously wasted.
[0003] The backflow prevention safety valve is mainly used to prevent the backflow of the medium, the reversal of the pump and the driving motor, and the release of the container medium. It is a safety device. The backflow prevention safety valve is generally installed at the outlet of the pump to prevent the backflow phenomenon when the pump stops running, thereby avoiding the reversal of the pump and the driving motor, and the release of the container medium. In addition, for some media with higher hygiene requirements, such as food, medicine, etc., a backflow prevention safety valve can also be installed to prevent the medium from being contaminated. However, the existing safety valves cannot play an efficient role in liquid-gas separation and backflow prevention. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the above-mentioned defects in the prior art and provide a backflow prevention safety device, which is safe to operate, has a good purification effect, and has a good backflow prevention effect, reduces waste, and saves energy and reduces consumption.
[0005] The anti-backflow safety device described in the utility model comprises a quenching tower, an anti-backflow valve and a separation tower, the bottom of the quenching tower is connected to the separation tower through the anti-backflow valve, the top of the separation tower is connected to the quenching tower, the lower end of the separation tower is connected to the top of the quenching tower, and a sulfuric acid adding pipe is connected to the pipeline connecting the lower end of the separation tower and the top of the quenching tower, the anti-backflow valve is provided with an air outlet pipe, and the pipeline connecting the top of the separation tower and the quenching tower is connected to the air outlet pipe.
[0006] The anti-backflow valve is provided with a buffer chamber and an active chamber inside, the buffer chamber is communicated with the liquid inlet, the buffer chamber is communicated with the active chamber, the active chamber is communicated with the liquid outlet, and the active chamber is connected with the air outlet pipe.
[0007] Preferably, a synthetic ammonia gas outlet is provided at the top of the quenching tower.
[0008] Preferably, a baffle is placed in the movable chamber. The size of the baffle is set according to the upper opening of the buffer chamber, and the baffle is provided with a thread connected with the blocking nail. The blocking nail can be obtained by screwing a screw cap on a screw by threading, and the diameter of the screw cap corresponds to the diameter of the upper opening of the buffer chamber. The upper opening of the movable chamber extends all the way to the body of the anti-reflux valve and also extends to the flange cover, which are connected to facilitate the emergence of gas.
[0009] Preferably, a blocking nail is movably connected to the baffle.
[0010] Preferably, the plugging nail is a threaded nail type.
[0011] Preferably, the anti-backflow valve is fixedly connected via a flange cover, and the flange cover and the body of the anti-backflow valve are fixed via bolts.
[0012] Preferably, a circulating pump is provided at the bottom of the quenching tower.
[0013] The anti-backflow safety device described in the utility model is that during the separation and purification of synthetic ammonia, sulfuric acid is transported into the quenching tower through the sulfuric acid addition pipe to react with the synthetic ammonia, nitrogen and the like of the reaction gas in the quenching tower. In the quenching tower, the sulfuric acid solution reacts with the ammonia to generate an ammonium sulfate solution to remove the ammonia in the reaction gas. The gaseous synthetic ammonia in the reaction gas moves toward the top of the quenching tower. The ammonium sulfate solution generated after the reaction flows to the bottom of the quenching tower, mixed with liquid synthetic ammonia and unreacted sulfuric acid solution. By connecting a separation tower between the bottom and top side walls of the quenching tower, the intermediate reaction products of the quenching tower are re-separated for a second time and the desired products are sent back to the quenching tower again. The synthetic ammonia gas separated by the separation tower continues to enter the quenching tower and is collected from the synthetic ammonia gas outlet together with the synthetic ammonia gas. This improves the synthetic ammonia refining yield and improves the purity of the gaseous synthetic ammonia. The anti-backflow valve allows the liquid from the bottom of the quenching tower to enter the buffer chamber through the liquid inlet. Under the liquid pressure, the blocking nail is lifted up, and the blocking nail drives the baffle to be lifted up together. The liquid flows into the liquid outlet, and the entrained gas enters the quenching tower from the outlet pipe. Due to the existence of the buffer chamber, even if a small amount of liquid is blocked, it will not flow back, but will be temporarily stored in the buffer chamber, thereby achieving the effect of efficiently conveying liquid and unblocking gas and preventing backflow.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] The utility model provides an anti-backflow safety device, which has a good purification effect on synthetic ammonia, reduces waste, has high safety, and has high process stability, thereby playing a role in energy saving, consumption reduction, cost reduction, and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1It is a schematic diagram of the backflow prevention safety device of the utility model.
[0017] Figure 2 This is a schematic diagram of the structure of the anti-backflow valve.
[0018] Figure 1 In the figure: 1. quenching tower; 2. circulating pump; 3. anti-reflux valve; 4. separation tower; 5. sulfuric acid addition pipe; 6. synthetic ammonia gas outlet; 7. gas outlet pipe.
[0019] Figure 2 Middle: 31, liquid inlet; 32, liquid outlet; 33, buffer chamber; 34, blocking pin; 35, baffle; 36, activity chamber; 37, flange cover. DETAILED DESCRIPTION
[0020] The utility model is further described below in conjunction with specific embodiments.
[0021] The anti-backflow safety device described in the utility model comprises a quenching tower 1, an anti-backflow valve 3, and a separation tower 4. The bottom of the quenching tower 1 is connected to the separation tower 4 through the anti-backflow valve 3, the top of the separation tower 4 is connected to the quenching tower 1, the lower end of the separation tower 4 is connected to the top of the quenching tower 1, and a sulfuric acid adding pipe 5 is connected to the pipeline connecting the lower end of the separation tower 4 and the top of the quenching tower 1, the anti-backflow valve 3 is provided with an outlet pipe 7, and the pipeline connecting the top of the separation tower 4 and the quenching tower 1 is connected to the outlet pipe 7.
[0022] The anti-backflow valve 3 is provided with a buffer chamber 33 and an active chamber 36 inside. The buffer chamber 33 is communicated with the liquid inlet 31 , the buffer chamber 33 is communicated with the active chamber 36 , the active chamber 36 is communicated with the liquid outlet 32 , and the active chamber 36 is connected to the air outlet pipe 7 .
[0023] The top of the quench tower 1 is provided with a synthetic ammonia gas outlet 6 .
[0024] The movable chamber 36 is provided with a baffle 35. The size of the baffle 35 is set according to the upper opening of the buffer chamber 33, and the baffle 35 is provided with a thread to be threadedly connected with the blocking nail 34. The blocking nail 34 can be obtained by screwing a screw cap on a screw, and the diameter of the screw cap corresponds to the diameter of the upper opening of the buffer chamber 33. The upper opening of the movable chamber 36 extends all the way to the body of the anti-reflux valve 3, and also extends to the flange cover 37, which are all connected, so that the gas can be easily emitted.
[0025] The baffle plate 35 is movably connected with a blocking nail 34 .
[0026] The blocking nail 34 is a screw nail type.
[0027] The anti-backflow valve 3 is fixedly connected via a flange cover 37. The flange cover 37 and the body of the anti-backflow valve 3 are fixed via bolts.
[0028] A circulating pump 2 is provided at the bottom of the quenching tower 1 .
[0029] In the anti-backflow safety device of the utility model, when the synthetic ammonia is separated and purified, sulfuric acid is transported into the quench tower 1 through the sulfuric acid adding pipe 5, and reacts with the reaction gas synthetic ammonia, nitrogen, etc. in the quench tower 1. In the quench tower 1, the sulfuric acid solution reacts with the ammonia to generate an ammonium sulfate solution to remove the ammonia in the reaction gas. The gaseous synthetic ammonia in the reaction gas moves toward the top of the quench tower 1. The ammonium sulfate solution generated after the reaction flows to the bottom of the quench tower 1, mixed with liquid synthetic ammonia and unreacted sulfuric acid solution. By connecting the separation tower 4 between the bottom and the top side wall of the quench tower 1, the intermediate reaction product of the quench tower 1 is re-separated for a second time and the desired product is sent back to the quench tower 1 again. The synthetic ammonia gas separated by the separation tower 4 continues to enter the quench tower 1 and is collected from the synthetic ammonia gas outlet 6 together with the synthetic ammonia gas. This improves the synthetic ammonia refining yield and improves the purity of the gaseous synthetic ammonia. The anti-backflow valve 3 allows the liquid from the bottom of the quenching tower 1 to enter the buffer chamber 33 through the liquid inlet 31. Under the liquid pressure, the blocking nail 34 is lifted up, and the blocking nail 34 drives the baffle 35 to be lifted up together. The liquid flows into the liquid outlet, and the entrained gas enters the quenching tower 1 from the outlet pipe 7. With the existence of the buffer chamber 33, even if a small amount of liquid is blocked, it will not flow back, but will be temporarily stored in the buffer chamber 33, thereby achieving the effect of efficiently conveying liquid and unblocking gas and preventing backflow.
[0030] The utility model is used in the purification and separation device process of synthetic ammonia.
[0031] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and any equivalent changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention shall fall within the scope of the patent coverage of the present invention.
Claims
1. A backflow prevention safety device, characterized in that: The invention comprises a quenching tower (1), an anti-reflux valve (3), and a separation tower (4), wherein the bottom of the quenching tower (1) is connected to the separation tower (4) via the anti-reflux valve (3), the top of the separation tower (4) is connected to the quenching tower (1), the lower end of the separation tower (4) is connected to the top of the quenching tower (1), and a sulfuric acid adding pipe (5) is connected to the pipeline connecting the lower end of the separation tower (4) and the top of the quenching tower (1), the anti-reflux valve (3) is provided with an outlet pipe (7), and the pipeline connecting the top of the separation tower (4) and the quenching tower (1) is connected to the outlet pipe (7); The anti-backflow valve (3) is provided with a buffer chamber (33) and an active chamber (36) inside. The buffer chamber (33) is communicated with the liquid inlet (31), the buffer chamber (33) is communicated with the active chamber (36), the active chamber (36) is communicated with the liquid outlet (32), and the active chamber (36) is connected to the air outlet pipe (7).
2. The backflow prevention safety device according to claim 1, characterized in that: The top of the quenching tower (1) is provided with a synthetic ammonia gas outlet (6).
3. The backflow prevention safety device according to claim 1, characterized in that: The activity chamber (36) is provided with a baffle (35).
4. The backflow prevention safety device according to claim 3, characterized in that: The baffle (35) is movably connected with a blocking nail (34).
5. The backflow prevention safety device according to claim 4, characterized in that: The plugging nail (34) is a screw nail type.
6. The backflow prevention safety device according to claim 1, characterized in that: The anti-backflow valve (3) is fixedly connected via a flange cover (37).
7. The backflow prevention safety device according to claim 1, characterized in that: A circulating pump (2) is provided at the bottom of the quenching tower (1).