Automatic exhaust device of desulfurization slurry circulating pump inlet filter screen box

Abstract

The utility model discloses an automatic exhaust device of a desulfurization slurry circulating pump inlet filter screen box, which comprises a urea solution circulating pump body, one side of the urea solution circulating pump body is connected with an input pipe, one end of the urea solution circulating pump body is connected with an output pipe, and a filter component is arranged on the input pipe; the filtering assembly comprises a filtering tank body connected with the input pipe, through holes are formed in the two sides of the filtering tank body, the through hole in one side of the filtering tank body is communicated with the input pipe, an opening is formed in the top of the filtering tank body, the outer wall of the opening is in threaded connection with a sealing cap, and an automatic exhaust valve is arranged at the top of the sealing cap; an exhaust port of the automatic exhaust valve is in threaded connection with a silencing sleeve, a silencing layer is arranged on the inner wall of the silencing sleeve, and a metal filter screen cylinder is inserted into the filter tank body. According to the device, gas in the urea solution conveying process can be discharged in time, and gas gathering is avoided, so that flowing of the urea solution is guaranteed, and the filtering effect of the metal filtering net cylinder is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of urea hydrolysis preparation technology, specifically an automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump. Background Technology

[0002] Urea hydrolysis is a method that converts solid urea into ammonia (NH3), and is commonly used to prepare denitrification reducing agents required in SCR (Selective Catalytic Reduction) or SNCR (Selective Non-Catalytic Reduction) systems. This method is particularly useful in industry because it can produce ammonia on-site, reducing the risks associated with transporting and storing liquid ammonia.

[0003] The process of preparing denitrification reducing agent by urea hydrolysis requires the use of various equipment, such as hoisting facilities, bucket elevator system, urea dissolving tank, urea solution storage tank, and urea solution circulation pump. Among them, the urea solution circulation pump needs to be used with a filter, and the filter is equipped with a filter screen. At the same time, the urea solution contains a certain amount of gas during transportation. As the gas increases, the gas accumulation will affect the flow of urea solution and affect the filtration effect. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this invention is to provide an automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump, so as to solve the problem mentioned in the background art that gas easily accumulates inside the filter during the urea solution transportation process, affecting the filtration effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump, comprising a urea solution circulation pump body, an input pipe connected to one side of the urea solution circulation pump body, an output pipe connected to one end of the urea solution circulation pump body, and a filter assembly provided on the input pipe;

[0006] The filter assembly includes a filter tank connected to the input pipe. The top of the filter tank has an opening, and a sealing cap is threaded to the outer wall of the opening. An automatic vent valve is provided on the top of the sealing cap. A sound-absorbing sleeve is threaded to the vent of the automatic vent valve. A sound-absorbing layer is provided on the inner wall of the sound-absorbing sleeve. A metal filter cylinder is inserted inside the filter tank.

[0007] Preferably, the filter tank has through holes on both sides, and one through hole on one side of the filter tank is connected to the input pipe.

[0008] Preferably, the height of the end of the metal filter cylinder near the input pipe is higher than the height of the end of the metal filter cylinder far from the input pipe, and a notch is provided on the outer wall of the metal filter cylinder, with a connecting nail fixedly connected inside the notch.

[0009] Preferably, the metal filter cylinder is fitted with an intercepting mesh bag inside, and the opening of the intercepting mesh bag is fitted onto the connecting nail.

[0010] Preferably, a limiting rod is fixedly connected to the bottom of the sealing cap. The limiting rod is symmetrically distributed about the bisector of the sealing cap, and one end of the limiting rod is supported on the top of the metal filter cylinder.

[0011] Preferably, the sound-absorbing layer is made of rubber, has through holes, and has a wavy inner wall.

[0012] Preferably, the material of the interception net bag is rubber.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) This device can ensure that the gas is discharged in time during the transportation of urea solution, avoid gas accumulation, thereby ensuring the flow of urea solution and ensuring the filtration effect of metal filter cylinder.

[0015] (2) This device has an automatic exhaust valve installed on the sealing cap at the top of the filter tank. The gas inside the filter tank can be automatically discharged through the automatic exhaust valve to avoid gas accumulation. At the same time, a sound-absorbing sleeve is connected to the exhaust port of the automatic exhaust valve, and a sound-absorbing layer is set on the inner wall of the sound-absorbing sleeve. The sound-absorbing layer can buffer, decelerate and reduce noise during the gas flow process, thereby reducing exhaust noise.

[0016] (3) This device uses a metal filter cylinder inserted inside the filter tank and an interception net bag fitted on the metal filter cylinder to filter impurities in the urea solution. The interception net bag is also easy to remove and clean. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump according to the present invention.

[0018] Figure 2 This is a cross-sectional view of an automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump according to the present invention;

[0019] Figure 3 This utility model relates to an automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump. Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This utility model relates to an automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump. Figure 2 Enlarged view at point B in the middle;

[0021] Figure 5This is a top view of the filter tank of the automatic exhaust device for the inlet filter screen box of a desulfurization slurry circulation pump according to this utility model.

[0022] In the diagram: 1. Output pipe; 2. Filter assembly; 21. Filter tank; 22. Sealing cap; 23. Silencing sleeve; 24. Automatic exhaust valve; 25. Limiting rod; 26. Interception net bag; 27. Metal filter cylinder; 28. Silencing layer; 29. ​​Connecting nail; 3. Input pipe; 4. Urea solution circulation pump. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This utility model provides a technical solution: an automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump, including a urea solution circulation pump body 4, an input pipe 3 connected to one side of the urea solution circulation pump body 4, an output pipe 1 connected to one end of the urea solution circulation pump body 4, and a filter assembly 2 provided on the input pipe 3.

[0025] The filter assembly 2 includes a filter tank 21 connected to the input pipe 3. Both sides of the filter tank 21 have through holes, with one through hole connected to the input pipe 3. The top of the filter tank 21 has an opening, and a sealing cap 22 is threaded onto the outer wall of the opening. A limiting rod 25 is fixedly connected to the bottom of the sealing cap 22. The limiting rod 25 is symmetrically distributed about the bisector of the sealing cap 22, and one end of the limiting rod 25 is supported on the top of the metal filter cylinder 27. After sealing, the limiting rod 25 presses against the top of the filter tank 21, thus pressing down on the top of the metal filter cylinder 27 and ensuring its stability during use. The height of the end of the metal filter cylinder 27 near the input pipe 3 is higher than the end far from the input pipe 3. A notch is provided on the outer wall of the metal filter cylinder 27, and a connecting pin 29 is fixedly connected inside the notch. With this structure, urea solution can enter from the left side of the metal filter cylinder 27 and flow to the right. The gas passes through a filter and enters the input pipe 3. An intercepting mesh bag 26 is fitted inside the metal filter cylinder 27, with its opening secured to a connecting pin 29. The intercepting mesh bag 26 is made of rubber and can be easily removed and replaced inside the metal filter cylinder 27, preventing impurities from remaining on it. An automatic exhaust valve 24 is installed on the top of the sealing cap 22. A silencer sleeve 23 is threaded onto the exhaust port of the automatic exhaust valve 24. The inner wall of the silencer sleeve 23 has a sound-absorbing layer 28 made of rubber, with through holes and a wavy inner wall. This sound-absorbing layer 28 buffers the gas during exhaust, reducing noise. The metal filter cylinder 27 is inserted inside the filter tank 21. The sealing cap 22 of this device can be opened for easy maintenance.

[0026] Working principle: When using the automatic exhaust device of the inlet filter box of the desulfurization slurry circulation pump, the urea solution first enters the filter tank 21, passes through the intercepting net bag 26 and the metal filter cylinder 27, and then enters the urea solution circulation pump body 4 through the input pipe 3, and is then output from the output pipe 1. During the transportation process, the urea solution can automatically discharge gas through the automatic exhaust valve 24 to avoid gas accumulation. During the exhaust process, the automatic exhaust valve 24 contacts the sound-absorbing layer 28 during the gas flow, thus achieving the purpose of exhaust noise reduction. If it is necessary to replace the intercepting net bag 26, the sealing cap 22 can be rotated to separate the limiting rod 25 from the metal filter cylinder 27. Then, the intercepting net bag 26 on the connecting nail 29 on the outer wall of the metal filter cylinder 27 can be removed, and a new intercepting net bag 26 can be replaced and fitted onto the connecting nail 29.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump, comprising a urea solution circulation pump body (4), an input pipe (3) connected to one side of the urea solution circulation pump body (4), and an output pipe (1) connected to one end of the urea solution circulation pump body (4), characterized in that: A filter assembly (2) is provided on the input tube (3); The filter assembly (2) includes a filter tank (21) connected to the input pipe (3). The top of the filter tank (21) has an opening, and a sealing cap (22) is threaded to the outer wall of the opening. An automatic exhaust valve (24) is provided on the top of the sealing cap (22). A sound-absorbing sleeve (23) is threaded to the exhaust port of the automatic exhaust valve (24). A sound-absorbing layer (28) is provided on the inner wall of the sound-absorbing sleeve (23). A metal filter screen cylinder (27) is inserted inside the filter tank (21).

2. The automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump according to claim 1, characterized in that: Both sides of the filter tank (21) are provided with through holes, and one through hole of the filter tank (21) is connected to the input pipe (3).

3. The automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump according to claim 1, characterized in that: The height of the end of the metal filter cylinder (27) near the input pipe (3) is higher than the height of the end of the metal filter cylinder (27) far from the input pipe (3). The outer wall of the metal filter cylinder (27) has a notch, and a connecting nail (29) is fixedly connected inside the notch.

4. The automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump according to claim 1, characterized in that: The metal filter cylinder (27) is fitted with an interception net bag (26), and the opening of the interception net bag (26) is fitted onto the connecting nail (29).

5. The automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump according to claim 1, characterized in that: The bottom of the sealing cap (22) is fixedly connected to a limiting rod (25). The limiting rod (25) is symmetrically distributed about the bisector of the sealing cap (22). One end of the limiting rod (25) is supported on the top of the metal filter cylinder (27).

6. The automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump according to claim 1, characterized in that: The sound-absorbing layer (28) is made of rubber, and through holes are provided on the sound-absorbing layer (28). The inner wall of the sound-absorbing layer (28) has a wavy structure.

7. The automatic exhaust device for the inlet filter box of a desulfurization slurry circulation pump according to claim 4, characterized in that: The interception net bag (26) is made of rubber.

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