A device and method for preventing clogging of water spray circulation of a device for treating tail gas with nitro

Abstract

The present application relates to the field of chemistry, chemical production and environmental protection, and relates to a device and method for preventing blockage of water spraying circulation of a p-nitro tail gas treatment device, comprising multiple inlet inner pipes arranged in a water tank, wherein the multiple inlet inner pipes comprise horizontally arranged main pipes, and the main pipes are evenly provided with inclined inner pipes; the multiple inlet inner pipes comprise two, and one end of the main pipes of the two multiple inlet inner pipes is respectively connected to a low side and a middle side of the water tank; the low side and the middle side of the water tank are connected to a water outlet at the bottom of the water tank and a water circulating pump through a tee joint; and a high overflow port is arranged between the low side and the middle side of the water tank. The present application builds a new water outlet pipeline on the side of the water tank, avoids the influence of p-nitro particles in the p-nitro water tank on the water outlet blockage, and achieves the purpose of preventing blockage.

Description

TECHNICAL FIELD

[0001] The present application relates to the fields of chemistry, chemical production and environmental protection, and in particular to a device and method for treating and solving the problem of excessive water and liquid accumulation in the exhaust pipe of an environmental protection device, which causes abnormality or shutdown of a fan. BACKGROUND

[0002] Currently, in the tank area of the production of nitro, in order to further improve the tail gas treatment capacity of the tank area, a nitro tail gas treatment device is often added outside the nitro tank area. The working principle of the device is as follows: a fan is used to suck the tail gas of the nitro storage tank to a water washing tower, and the nitro component in the tail gas is in reverse contact with the water spray in the tower. By water spray cooling, the nitro component in the tail gas is phase changed (gas sublimation to solid) into water to achieve the effect of purifying the tail gas. The treated tail gas is sent to a subsequent para-nitro tail gas treatment device for secondary treatment. The wastewater containing solid nitro is discharged to a water tank below the water washing tower, and then is pumped and pressurized by a water circulating pump and sent to the top of the water washing tower to form a spray for recycling.

[0003] When the solid nitro in the water tank below the water washing tower of the tail gas treatment device accumulates at a relatively fast speed, the water outlet pipeline at the bottom of the water tank is gradually reduced in flow due to the blockage of the nitro, and eventually the spray circulation flow of the water washing tower is insufficient, and the design treatment capacity cannot be fully reached. The tail gas that is not treated properly causes the subsequent para-nitro tail gas treatment device to be in an overload operating state and eventually to be discharged in excess of the standard.

[0004] The existing treatment technology: when the outlet pressure of the water circulating pump is low, it indicates that the water tank outlet pipeline has been blocked, and manual dredging and cleaning must be performed on the pipeline from the water tank outlet to the inlet section of the water circulating pump. After cleaning, the pipeline is reassembled. Due to the frequent blockage of the water tank outlet pipeline, the service life is relatively short, and the pipeline needs to be disassembled and cleaned once every 3-5 days, which cannot meet the spray demand of the water washing tower for a normal service period (about one month). Manual cleaning consumes human resources and also produces a certain amount of nitro waste. SUMMARY

[0005] The purpose of the present application is to provide a device and method for preventing blockage of water spray circulation of a nitro tail gas treatment device to solve the above problems.

[0006] In order to achieve the above purpose, the main technical scheme of the present application is: a device for preventing blockage of water spray circulation of a nitro tail gas treatment device, characterized in that it comprises a multi-inlet inner pipe arranged in a water tank, the multi-inlet inner pipe comprises a horizontally arranged main pipe, and a plurality of inclined pipes are uniformly distributed on the main pipe; the multi-inlet inner pipe comprises two, and one end of the main pipes of the two multi-inlet inner pipes is respectively connected to a low-position outlet and a middle-position outlet on the side of the water tank. The low-position outlet and the middle-position outlet on the side of the water tank are connected to a water outlet at the bottom of the water tank and a water circulating pump through a three-way pipe; a high-position overflow port is arranged between the low-position outlet and the middle-position outlet on the side of the water tank.

[0007] Further, the multi-inlet interpolation pipe is arranged with three oblique insertion pipes in a uniform distribution manner, and the oblique insertion pipes are staggered left and right along the main pipe.

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

[0009] Further, one end of each of the two main pipes is welded with a DN40 mm inner insertion head, and the inner insertion heads are inserted into the low-position and middle-position discharge outlets on the side surface of the water tank.

[0010] Further, the water outlet at the bottom of the water tank is sequentially connected with a reducing nipple, a second ball valve, a filter, a tee joint, a third ball valve and a water circulating pump.

[0011] Further, the low-position and middle-position discharge outlets on the side surface of the water tank are connected with one end of a metal hose through a low-position discharge valve and a middle-position discharge valve on the side surface of the water tank, and the other end of the metal hose is connected with the water outlet at the bottom of the water tank and the water circulating pump through a first ball valve and a tee joint.

[0012] Further preferably, the low-position discharge valve and the middle-position discharge valve on the side surface of the water tank are connected with the metal hose through an F-shaped tee joint, the F-shaped tee joint has an overall "F" shape, a first end of the F-shaped tee joint is connected with the middle-position discharge valve on the side surface of the water tank, a second end of the F-shaped tee joint is connected with the low-position discharge valve on the side surface of the water tank, and a third end of the F-shaped tee joint is connected with the metal hose.

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

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

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

[0016] The application also includes connecting nipples and other components commonly used in the field.

[0017] The application also provides a treatment method using the above device, first, water is injected into the water tank until the water flows out of the high-position overflow outlet of the water tank, then the low-position discharge valve or the middle-position discharge valve on the side surface of the water tank, the first ball valve, the filter and the third ball valve at the rear end are opened in sequence, the second ball valve at the bottom of the water tank is closed, the water circulating pump is started according to the specification process, and the water circulating operation is performed by adjusting the opening degree of the outlet valve of the water circulating pump; the second ball valve and the third ball valve at the bottom of the water tank are opened periodically, the low-position discharge valve and the middle-position discharge valve on the side surface of the water tank are closed, the wastewater in the water tank is discharged into a ton barrel, and fresh water is added to the water tank.

[0018] The application is a device and method for preventing blockage of water spray circulation of a nitration tail gas treatment device. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Figure is a connection structure diagram of a water spray circulation anti-blocking device of a nitration tail gas treatment device provided by the embodiment of the application.

[0020] Figure 2 Figure is a structure diagram of a multi-inlet insertion pipe in the embodiment.

[0021] In the figure, 1 is a multi-inlet insertion pipe, 2 is a middle discharge valve, 3 is a low discharge valve, 4 is an F-shaped tee short section, 5 is a metal hose, 6 is an elbow short section, 7 is a first ball valve, 8 is a T-shaped tee short section, 9 is an overflow port, 10 is a water tank, 11 is a water outlet, 12 is a reducing short section, 13 is a second ball valve, 14 is a filter, 15 is a third ball valve, and 16 is a water circulation pump.

[0022] The accompanying drawings are used to provide a further understanding of the embodiments of the application, and constitute a part of the specification, and are used to explain the embodiments of the application together with the specific embodiments below, but do not constitute a limitation on the embodiments of the application. EMBODIMENT

[0023] The specific embodiments of the embodiments are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the embodiments of the application, and are not used to limit the embodiments of the application.

[0024] In the embodiments of the application, the orientation words such as “up, down, left, right” used without the opposite description generally refer to the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly used when the application / product is used. The terms “first”, “second”, “third” and the like are only used for description, and cannot be understood as indicating or implying relative importance.

[0025] The terms “parallel”, “vertical” and the like do not mean that the components must be absolutely parallel or vertical, but can be slightly inclined. For example, “parallel” only means that its direction is more parallel relative to “vertical”, and does not mean that the structure must be completely parallel, but can be slightly inclined.

[0026] The terms “horizontal”, “vertical”, “suspension” and the like do not mean that the components must be absolutely horizontal, vertical or suspended, but can be slightly inclined. For example, “horizontal” only means that its direction is more horizontal relative to “vertical”, and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0027] Furthermore, terms like "roughly" and "basically" are used to indicate that the content does not require absolute precision, but rather allows for a certain degree of deviation. For example, "roughly equal" does not simply mean absolute equality; in actual production and operation, achieving absolute "equality" is difficult, and a certain degree of deviation is generally present. Therefore, besides absolute equality, "roughly equal to" also includes the aforementioned situation where a certain degree of deviation exists. Using this as an example, in other cases, unless otherwise specified, terms like "roughly" and "basically" have similar meanings.

[0028] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1

[0029] Reference Appendix: A device for preventing clogging of water spray circulation in a nitrile tail gas treatment unit Figure 1 It mainly includes a multi-inlet inner tube 1 installed inside the water tank 10. The multi-inlet inner tube 1 includes a horizontally arranged main tube with several oblique inserts evenly distributed on the main tube. The multi-inlet inner tube 1 includes two tubes. One end of the main tube of the two multi-inlet inner tubes 1 is welded with a DN40mm inner plug, which is inserted into the low and middle discharge ports on the side of the water tank. A high overflow port 9 is provided between the low and middle discharge ports on the side of the water tank.

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

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

[0032] In this embodiment, the low-position discharge valve 3 and the middle-position discharge valve 2 on the side of the water tank are connected to the metal hose 5 via an F-type tee joint 4. The F-type tee joint 4 is in the shape of an "F". The first end of the F-type tee joint 4 is connected to the middle-position discharge valve 2 on the side of the water tank, the second end of the F-type tee joint 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 tee joint 4 is connected to the metal hose 5.

[0033] In the embodiment, the metal hose 5 is connected with the first ball valve 7 through the elbow short section 6; the length of the metal hose is two meters.

[0034] In the embodiment, reference is made to the drawings Figure 2 In the embodiment, the multi-inlet inner pipe 1 is arranged with three oblique pipes in a uniform manner by being staggered left and right along the main pipe; 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 main pipe and the oblique pipe have an angle of 45°.

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

[0036] The water spray circulating anti-blocking device for the treating device for the tail gas of nitrobenzene is adopted in the embodiment 1; the treating method of the device is as follows: first, water is injected into the water tank 10 until the water flows out from the high-side overflow port 9 of the water tank; then, the low-side discharge valve 3 and the middle-side discharge valve 2 of the water tank are opened in sequence (one of the two can be selected), the first ball valve 7, the third ball valve 15 at the rear end of the filter 14 are opened, the second ball valve 13 at the bottom of the water tank is closed, and the water circulating pump 16 is started according to the standard process. The water circulation operation is performed by adjusting the opening degree of the pump outlet valve; periodically (once a week), the second ball valve 13 at the bottom of the water tank and the third ball valve 15 are opened, the low-side discharge valve 3 and the middle-side discharge valve 2 of the water tank are closed, the wastewater in the water tank is discharged into the ton barrel, and fresh water is added into the water tank.

[0037] The water spray circulating anti-blocking device and method for the treating device for the tail gas of nitrobenzene in the embodiment can avoid the blocking of the outlet pipeline of the water tank by the large particles in the lower part of the water tank by constructing the low-side and middle-side discharge ports on the side of the water tank (the heights of the two discharge ports on the side are higher than that of the discharge port at the bottom of the storage tank); the low-side and middle-side discharge ports of the water tank are extended into the tank by using the structure of the multi-inlet inner pipe, which can avoid the blocking of the discharge port on the side of the water tank by the hanging material layer on the inner wall of the water tank (the material layer has a relatively hard texture and will gradually cover the discharge port); in addition, the design of the single 7-inlet (14 inlets in total) follows the redundancy design concept, which can comprehensively reduce the probability of blocking of the suction port. From the operation effect, the water circulation of the water tank for nitrobenzene can be stably operated, which fully meets the demand of a service period. The water washing tower / water tank does not need to be manually disassembled at the outlet section of the pipeline for dredging and cleaning in a service period, which saves human resources and avoids the generation of waste materials of nitrobenzene.

Claims

1. A device for preventing clogging of water spray circulation in a nitrile tail gas treatment unit, characterized in that, The application relates to a water tank with a multi-inlet inner pipe arranged in the water tank, wherein the multi-inlet inner pipe comprises horizontally arranged main pipes, and the main pipes are evenly arranged with several inclined pipes; the multi-inlet inner pipe comprises two, and one end of the main pipes of the two multi-inlet inner pipes is respectively connected with a low-position and a middle-position discharge port on the side of the water tank; the low-position and middle-position discharge ports on the side of the water tank are respectively connected with one end of a metal hose through a low-position discharge valve on the side of the water tank and a middle-position discharge valve on the side of the water tank; the other end of the metal hose is connected with a water outlet on the bottom of the water tank and a water circulating pump through a first ball valve and a three-way pipe; the water outlet on the bottom of the water tank is sequentially connected with a variable-diameter short pipe, a second ball valve, a three-way pipe, a filter, a third ball valve and the water circulating pump; a high-position overflow port is arranged between the low-position and middle-position discharge ports on the side of the water tank; the multi-inlet inner pipe is arranged with three inclined pipes which are evenly arranged and staggered along the left and right sides of the main pipes; the diameter of the main pipe is DN50mm, and the length is 1.2m; the diameter of the inclined pipe is DN50mm, and the length is 30cm; and the included angle between the main pipe and the inclined pipe is 45 degrees.

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

3. The device for preventing clogging of water spray circulation of the device for treating tail gas with nitro groups according to claim 1, characterized in that, The low-position and middle-position discharge valves on the side of the water tank are connected with the metal hose through an F-shaped three-way short pipe, the F-shaped three-way short pipe is in an overall "F" shape, the first end of the F-shaped three-way short pipe is connected with the middle-position discharge valve on the side of the water tank, the second end of the F-shaped three-way short pipe is connected with the low-position discharge valve on the side of the water tank, and the third end of the F-shaped three-way short pipe is connected with the metal hose.

4. The device for preventing clogging of water spray circulation of the device for treating tail gas with nitro groups according to claim 1, characterized in that, The metal hose is connected with the first ball valve through an elbow short pipe.

5. The device for preventing clogging of water spray circulation of the device for treating tail gas with nitro groups according to claim 1, 3 or 4, characterized in that, The length of the metal hose is two meters.

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