Device and method for preventing blockage of water spray circulation of nitrate tail gas treatment device

Abstract

The invention relates to the fields of chemistry, chemical industry production and environmental protection, and relates to a device and a method for preventing blockage of water spray circulation of a nitrate tail gas treatment device, the device comprises a multi-inlet inner insertion pipe arranged in a water tank, the multi-inlet inner insertion pipe comprises a horizontally arranged main pipe, and a plurality of inclined insertion pipes are uniformly distributed on the main pipe; one ends of main pipes of the two multi-inlet inner insertion pipes are connected with a low-position discharging port and a middle-position discharging port in the side face of the water tank respectively, and the low-position discharging port and the middle-position discharging port in the side face of the water tank are connected with a water outlet in the bottom of the water tank and the water circulating pump through a tee joint; and a high-position overflow port is arranged between the low-position discharge port and the middle-position discharge port on the side surface of the water tank. By constructing a new water outlet pipeline on the side face of the water tank, the influence of nitrate particles in the nitrate water tank on water outlet blockage is comprehensively avoided, and the aim of preventing blockage is achieved.

Description

Technical Field

[0001] The invention relates to the fields of chemistry, chemical production and environmental protection, and in particular to a device and method for treating and resolving the problems of water accumulation in an exhaust pipe of an environmental protection device, excessive liquid accumulation leading to abnormality or tripping of a fan, and the like. Background Art

[0002] At present, in the tank area for nitrate production, in order to further improve the nitrate tail gas treatment capacity of the tank area, nitrate tail gas treatment equipment is often added outside the nitrate tank area. Its working principle is: the tail gas of the nitrate storage tank is pumped to the water washing tower by fan suction, and the nitrate component in the tail gas is reversely contacted with water spray in the tower, and the nitrate component in the tail gas is cooled by water spray to cause phase change (gas condenses into solid) and enters the water to achieve the effect of purifying the tail gas. The treated tail gas is sent to the subsequent ortho-nitrate tail gas treatment device for secondary treatment; the wastewater containing solid nitrate is retained in the water tank directly below the water washing tower, and then sucked and pressurized by a water circulation pump and sent to the top of the water washing tower to form a spray for recycling.

[0003] When the solids of paranitrate accumulate at a fast rate in the water tank directly below the water scrubber of the tail gas treatment device, the flow of the water outlet pipeline at the bottom of the water tank is gradually reduced due to the blockage of paranitrate, which eventually leads to insufficient spray circulation flow of the water scrubber and completely fails to reach the designed treatment capacity. The untreated tail gas causes the subsequent orthonitrate tail gas treatment device to operate in an overloaded state and eventually exceed the emission standards.

[0004] Existing treatment technology: When the outlet pressure of the water circulation pump is low, it indicates that the water tank discharge pipeline is blocked. The pipeline from the water tank outlet to the water circulation pump inlet must be opened for manual dredging and cleaning, and then reinstalled after cleaning. Since the water tank outlet pipeline is frequently blocked and has a short service life, it generally needs to be disassembled and cleaned every 3-5 days, which cannot meet the spraying requirements of a normal service life of the water washing tower (about 1 month). Manual cleaning consumes human resources and generates a certain amount of nitrate waste. Summary of the invention

[0005] The object of the present invention is to provide a device and method for preventing clogging of the water spray circulation of a nitrate tail gas treatment device in view of the above-mentioned problem.

[0006] In order to achieve the above-mentioned purpose, the main technical scheme of the present invention is: a device for preventing blockage of water spray circulation in a nitrate tail gas treatment device, characterized in that it includes a multi-inlet inner insert pipe arranged in a water tank, the multi-inlet inner insert pipe includes a horizontally arranged main pipe, and a plurality of inclined insert pipes are evenly distributed on the main pipe; the multi-inlet inner insert pipe includes two main pipes, one end of the two multi-inlet inner insert pipes is respectively connected to the low-position and middle-position discharge ports on the side of the water tank, and the low-position and middle-position discharge ports on the side of the water tank are connected to the water outlet at the bottom of the water tank and the water circulation pump through a tee; a high-position overflow port is provided between the low-position discharge port and the middle discharge port on the side of the water tank.

[0007] Furthermore, the multi-inlet inner insert pipes are staggered and evenly arranged with three oblique insert pipes on the left and right sides of the main pipe.

[0008] Further preferably, the main pipe has a diameter of DN50 mm and a length of 1.2 m, the oblique pipe has a diameter of DN50 mm and a length of 30 cm, and the angle between the main pipe and the oblique pipe is 45°.

[0009] Furthermore, one end of the two main pipes is respectively welded with a DN40mm internal plug, which is inserted into the low-position and middle-position discharge ports on the side of the water tank.

[0010] Furthermore, the water outlet at the bottom of the water tank is sequentially connected to a reducing nipple, a second ball valve, a filter, a tee, a third ball valve and a water circulation pump.

[0011] Furthermore, the low-position and middle-position discharge ports on the side of the water tank are respectively connected to one end of the metal hose through the low-position discharge valve on the side of the water tank and the middle-position discharge valve on the side of the water tank, and the other end of the metal hose is connected to the water outlet at the bottom of the water tank and the water circulation pump through the first ball valve and the tee.

[0012] Further preferably, the low-position discharge valve on the side of the water tank and the middle-position discharge valve on the side of the water tank are connected to the metal hose through an F-type three-way short section, and the F-type three-way short section is "F"-shaped as a whole. The first end of the F-type three-way short section is connected to the middle-position discharge valve on the side of the water tank, the second end of the F-type three-way short section is connected to the low-position discharge valve on the side of the water tank, and the third end of the F-type three-way short section is connected to the metal hose.

[0013] Further preferably, the metal hose is connected to the first ball valve via an elbow nipple.

[0014] Further preferably, the length of the metal hose is two meters.

[0015] Furthermore, the low-position discharge valve on the side of the water tank and the middle-position discharge valve on the side of the water tank are both ball valves.

[0016] The present invention also includes components such as connecting short sections commonly used in the art.

[0017] The present invention also provides a treatment method using the above-mentioned device, firstly, water is poured into the water tank until water flows out of the high-position overflow port of the water tank, then the low-position discharge valve or the middle-position discharge valve on the side of the water tank, the first ball valve, and the third ball valve at the rear end of the filter are opened in sequence, and the second ball valve at the water outlet at the bottom of the water tank is closed, and the water circulation pump is started according to the standard process, and the opening of the outlet valve of the water circulation pump is adjusted to perform water circulation operation; the second ball valve and the third ball valve at the bottom of the water tank are opened regularly, and the low-position discharge valve and the middle-position discharge valve on the side of the water tank are closed to discharge the waste water in the water tank into the ton barrel, and then fresh water is added to the water tank.

[0018] The device and method for preventing clogging of the water spray circulation of the nitrate tail gas treatment device of the present invention completely avoids the influence of nitrate particles in the nitrate water tank on the clogging of the water outlet by constructing a new water outlet pipeline on the side of the water tank, thereby achieving the purpose of preventing clogging. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the connection structure of a waterproof spray circulation anti-clogging device for a nitrate tail gas treatment device provided in an embodiment of the present invention.

[0020] Figure 2 Schematic diagram of the structure of the multi-inlet inner cannula in the embodiment.

[0021] In the figure, 1-multi-inlet inner tube, 2-middle position discharge valve, 3-low position discharge valve, 4-F type three-way short section, 5-metal hose, 6-elbow short section, 7-first ball valve, 8-T type three-way short section, 9-overflow port, 10-water tank, 11-water outlet, 12-reducing short section, 13-second ball valve, 14-filter, 15-third ball valve, 16-water circulation pump.

[0022] The accompanying drawings are used to provide a further understanding of the present invention / invention embodiments and constitute a part of the specification. Together with the following specific implementation methods, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. Implementation

[0023] The specific implementation of the embodiment is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0024] In the embodiments of the present invention, unless otherwise stated, the directional words used, such as "upper, lower, left, right", generally refer to the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the invention / inventive product is usually placed when in use. The terms "first", "second", "third", etc. are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0025] The terms "parallel", "vertical", etc. do not mean that the components must be absolutely parallel or vertical, but can be slightly tilted. For example, "parallel" only means that its direction is more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly tilted.

[0026] The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal, vertical or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In addition, the terms "roughly" and "basically" are intended to explain that the relevant content does not require absolute precision, but can have certain deviations. For example, "roughly equal" does not only mean absolute equality. Since it is difficult to achieve absolute "equality" in actual production and operation, there are generally certain deviations. Therefore, in addition to absolute equality, "roughly equal" also includes the above-mentioned situation with certain deviations. Taking this as an example, in other cases, unless otherwise specified, the terms "roughly" and "basically" have similar meanings to the above.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example 1

[0029] A device for preventing clogging of water spray circulation in a nitrate tail gas treatment device Figure 1 , mainly comprising a multi-inlet inner insert pipe 1 arranged in a water tank 10, the multi-inlet inner insert pipe 1 comprising a horizontally arranged main pipe, on which a plurality of oblique insert pipes are evenly distributed; the multi-inlet inner insert pipe 1 comprises two, one end of each main pipe of the two multi-inlet inner insert pipes 1 are respectively welded with DN40mm internal plugs, which are inserted into the low-position and middle-position discharge ports on the side of the water tank; a high-position overflow port 9 is arranged between the low-position and middle-position discharge ports on the side of the water tank.

[0030] In the embodiment, the water outlet 11 at the bottom of the water tank 10 is sequentially connected to the reducing nipple 12 , the second ball valve 13 , the filter 14 , the T-type three-way nipple 8 , the third ball valve 15 and the water circulation pump 16 .

[0031] In the embodiment, the low-position and middle-position discharge ports on the side of the water tank are connected to one end of the metal hose 5 through the low-position discharge valve 3 on the side of the water tank and the middle-position discharge valve 2 on the side of the water tank, respectively, and the other end of the metal hose 5 is connected to the water outlet 11 at the bottom of the water tank and the water circulation pump 16 through the first ball valve 7 and the T-type three-way short section 8.

[0032] In the embodiment, the low-position discharge valve 3 on the side of the water tank and the middle-position discharge valve 2 on the side of the water tank are connected with the metal hose 5 through an F-type three-way short section 4. The F-type three-way short section 4 is "F"-shaped as a whole. The first end of the F-type three-way short section 4 is connected to the middle-position discharge valve 2 on the side of the water tank, the second end of the F-type three-way short section 4 is connected to the low-position discharge valve 3 on the side of the water tank, and the third end of the F-type three-way short section 4 is connected to the metal hose 5.

[0033] In the embodiment, the metal hose 5 is connected to the first ball valve 7 via an elbow nipple 6; the length of the metal hose is two meters.

[0034] In the embodiments, reference is made to Figure 2 , multiple inlet inner pipes 1 are staggered and evenly arranged along the left and right sides of the main pipe, and three oblique pipes are arranged; the main pipe diameter is DN50mm and the length is 1.2m of steel pipe, the oblique pipe diameter is DN50mm and the length is 30cm of steel pipe, and the angle between the main pipe and the oblique pipe is 45°.

[0035] The embodiment also includes components such as connecting short sections commonly used in the art. The low-position discharge valve 3 on the side of the water tank and the middle-position discharge valve 2 on the side of the water tank are both ball valves. Example 2

[0036] The device for water spraying circulation and anti-blocking of the nitrate tail gas treatment device of Example 1 is used. The treatment method of the device is as follows: first, water is poured into the water tank 10 until water flows out of the high overflow port 9 of the water tank, and the low-position discharge valve 3 and the middle-position discharge valve 2 (one of the two can be selected) on the side of the water tank are opened in sequence, the first ball valve 7, and the third ball valve 15 at the rear end of the filter 14, and the second ball valve 13 at the water outlet at the bottom of the water tank is closed, and the water circulation pump 16 is started according to the standard process. The opening of the pump outlet valve is adjusted to perform water circulation operation; regularly (once a week), the second ball valve 13 and the third ball valve 15 at the bottom of the water tank are opened, and the low-position discharge valve 3 and the middle-position discharge valve 2 on the side of the water tank are closed to discharge the wastewater in the water tank into the ton barrel, and then fresh water is added to the water tank.

[0037] Embodiments The device and method for preventing the water spray circulation of the nitrate tail gas treatment device from being blocked can be used to discharge the material by constructing low-position and middle-position discharge ports on the side of the water tank (the heights of the two discharge ports on the side are higher than the discharge port at the bottom of the storage tank); by using a multi-tube inner tube structure to extend the low-position and middle-position discharge ports on the side of the water tank into the tank, on the one hand, it can avoid the blockage of the discharge port on the side of the water tank by the wall-hanging material layer on the inner wall of the water tank (this material layer is relatively hard and will gradually cover the discharge port); on the other hand, the multi-inlet design of a single 7-inlet (two total 14-inlet) follows the redundant design concept, which comprehensively reduces the probability of suction port blockage. From the operating effect, the water circulation of the nitrate water tank can operate stably and fully meet the needs of a use cycle. It avoids the defect that the water washing tower / water tank needs to manually disassemble the water tank outlet section pipeline for dredging and cleaning during a use cycle, saving human resources and avoiding the generation of nitrate waste.

Claims

1. A device for preventing clogging of water spray circulation in a nitrate tail gas treatment device, characterized in that: It comprises a multi-inlet inner insert pipe arranged in a water tank, the multi-inlet inner insert pipe comprises a horizontally arranged main pipe, on which a plurality of oblique insert pipes are evenly distributed; the multi-inlet inner insert pipe comprises two main pipes, one end of each of which is respectively connected to a low-position and a middle-position discharge port on the side of the water tank, the low-position and the middle-position discharge port on the side of the water tank are connected to a water outlet at the bottom of the water tank and a water circulation pump through a tee; a high-position overflow port is arranged between the low-position and the middle-position discharge port on the side of the water tank.

2. The device for preventing clogging of water spray circulation in a nitrate tail gas treatment device according to claim 1, characterized in that: The multi-inlet inner insert pipes are staggered and evenly arranged with three oblique insert pipes along the left and right sides of the main pipe.

3. The device for preventing clogging of water spray circulation in a nitrate tail gas treatment device according to claim 2, characterized in that: The main pipe has a diameter of DN50mm and a length of 1.2m, the oblique pipe has a diameter of DN50mm and a length of 30cm, and the angle between the main pipe and the oblique pipe is 45°.

4. The device for preventing clogging of water spray circulation in a nitrate tail gas treatment device according to claim 1, characterized in that: One end of the two main pipes is respectively welded with a DN40mm internal plug, which is inserted into the low-position and middle-position discharge ports on the side of the water tank.

5. The device for preventing clogging of water spray circulation in a nitrate tail gas treatment device according to claim 1, characterized in that: The water outlet at the bottom of the water tank is connected in sequence to a reducing nipple, a second ball valve, a filter, a tee, a third ball valve and a water circulation pump.

6. The device for preventing clogging of water spray circulation in a nitrate tail gas treatment device according to claim 1 or 5, characterized in that: The low-position and middle-position discharge ports on the side of the water tank are connected to one end of the metal hose through the low-position discharge valve on the side of the water tank and the middle-position discharge valve on the side of the water tank respectively, and the other end of the metal hose is connected to the water outlet at the bottom of the water tank and the water circulation pump through the first ball valve and the tee.

7. The device for preventing clogging of water spray circulation in a nitrate tail gas treatment device according to claim 6, characterized in that: The low-position discharge valve on the side of the water tank and the middle-position discharge valve on the side of the water tank are connected to the metal hose through an F-type three-way short section. The F-type three-way short section is "F"-shaped as a whole. The first end of the F-type three-way short section is connected to the middle-position discharge valve on the side of the water tank, the second end of the F-type three-way short section is connected to the low-position discharge valve on the side of the water tank, and the third end of the F-type three-way short section is connected to the metal hose.

8. The device for preventing clogging of water spray circulation in a nitrate tail gas treatment device according to claim 6, characterized in that: The metal hose is connected to the first ball valve via an elbow nipple.

9. The device for preventing clogging of water spray circulation in a nitrate tail gas treatment device according to claim 6, 7 or 8, characterized in that: The length of the metal hose is two meters.

10. A method for preventing clogging of a water spray circulation in a nitrate tail gas treatment device, characterized in that Using the device as described in any one of claims 1 to 9, first fill the water tank with water until water flows out of the high overflow port of the water tank, then open the low-level discharge valve or the middle-level discharge valve on the side of the water tank, the first ball valve, and the third ball valve at the rear end of the filter in sequence, close the second ball valve at the water outlet at the bottom of the water tank, start the water circulation pump according to the standard process, and adjust the opening of the outlet valve of the water circulation pump to perform water circulation operation; regularly open the second ball valve and the third ball valve at the bottom of the water tank, close the low-level discharge valve and the middle-level discharge valve on the side of the water tank, discharge the waste water in the water tank into the ton barrel, and then add fresh water to the water tank.

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