Gas washing system for wastewater treatment

Abstract

The utility model relates to the technical field of waste gas filtration, and provides a scrubber system for wastewater treatment, which comprises a scrubber tower, and the scrubber tower comprises a separation cylinder; the wire mesh demister is arranged in the separation barrel, the separation barrel is divided into a first cavity and a second cavity by the wire mesh demister, the second cavity is provided with a first liquid inlet and a first liquid outlet, and the first cavity is provided with a first air outlet; an outlet of the air inlet pipe penetrates through the wire mesh demister and is positioned in the second cavity; the plurality of first spray headers are arranged in the air inlet pipe, and the first spray headers are communicated with the first liquid outlet. Through the technical scheme, the problem of entrainment of secondary steam from the evaporator in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas filtering, and in particular to an air washing system for waste water treatment. Background Art

[0002] In recent years, my country's agriculture has developed rapidly. As an important agricultural material, fertilizers have been in high demand. Ammonium chloride wastewater is produced in the fertilizer production process. Ammonium chloride wastewater contains ammonia nitrogen and chloride ions. Direct discharge of ammonium chloride wastewater not only pollutes the environment, but also cannot recover the ammonium chloride in the wastewater, resulting in a waste of resources. If ammonium chloride can be recovered, it can not only realize the reuse of wastewater resources, but also conform to my country's sustainable development concept.

[0003] Ammonium chloride is easy to decompose at high temperatures. If the temperature is too high or it is crystallized and evaporated at high temperatures for a long time, harmful gases will be generated, making the ammonium chloride unable to be recycled and reused. This not only causes a waste of resources, but also produces waste gas. Therefore, MVR technology is used to decompose ammonium chloride. However, the secondary steam generated from the evaporator will be entrained with mist, which will directly enter the compressor and corrode the compressor blades, seriously shortening the service life of the compressor. Utility Model Content

[0004] The utility model provides a gas washing system for wastewater treatment, which solves the problem of secondary steam mist entrainment from an evaporator in the related technology.

[0005] The technical solution of the utility model is as follows:

[0006] A scrubbing system for wastewater treatment, comprising a scrubbing tower, wherein the scrubbing tower comprises:

[0007] Separation cylinder;

[0008] A wire mesh demister, the wire mesh demister is arranged in the separation cylinder, the wire mesh demister divides the separation cylinder into a first cavity and a second cavity, the second cavity has a first liquid inlet and a first liquid outlet, and the first cavity has a first gas outlet;

[0009] An air inlet pipe, the outlet of which passes through the wire mesh demister and is located in the second cavity;

[0010] The first spray head has a plurality of first spray heads, is disposed in the air inlet pipe, and is communicated with the first liquid outlet.

[0011] Optionally, it also includes:

[0012] a crystal separator, wherein a secondary steam outlet of the crystal separator is in communication with the air inlet pipe;

[0013] A first compressor, wherein the first compressor air inlet is connected to the first air outlet.

[0014] Optionally, it also includes:

[0015] A first pump body, wherein the first liquid outlet is connected to the first spray head through the first pump body, and the first pump body outlet is also connected in parallel to the crystallizer material inlet;

[0016] A Y-type filter, wherein the first liquid outlet is connected to the first pump body through the Y-type filter.

[0017] Optionally, it also includes:

[0018] a second pump body, wherein the material outlet of the crystal separator is in communication with the inlet of the second pump body;

[0019] a discharge pump, the discharge pump being in communication with an outlet of the second pump body;

[0020] The second pump body outlet is also connected to the evaporator inlet, and the evaporator outlet is connected to the crystallizer separator material inlet.

[0021] Optionally, the height of the separation barrel is at least twice the diameter of the separation barrel.

[0022] Optionally, it also includes:

[0023] A liquid level meter is arranged on the side wall of the separation cylinder, and the distance between the liquid level detected by the sensing point on the liquid level meter and the outlet of the air inlet pipe is at least 0.5m.

[0024] Optionally, it also includes:

[0025] A second shower head is disposed in the first cavity.

[0026] Optionally, both the first spray head and the second spray head have ball-tip nozzles.

[0027] Optionally, the vertical distance between adjacent first sprinkler heads is 1-2 m.

[0028] The working principle and beneficial effects of the utility model are:

[0029] 1. In the utility model, a gas washing system is designed, and its core component is a gas washing tower. The gas washing tower includes a separation cylinder, a wire mesh demister, an air inlet pipe, and a first spray head. The wire mesh demister divides the separation cylinder into a first cavity and a second cavity. A first gas outlet is arranged in the first cavity, and a first liquid inlet and a first liquid outlet are arranged in the second cavity.

[0030] Specifically, the reaction liquid enters the separation cylinder from the first liquid inlet and enters the first spray head from the first liquid outlet. When the gas to be treated enters the air inlet pipe, the first spray head in the air inlet pipe sprays the reaction liquid. After the gas to be treated and the reaction liquid are fully reacted in the air inlet pipe, they enter the second cavity of the separation cylinder together. The gas passes through the wire mesh demister in the separation cylinder to remove the mist. After the removal is completed, the gas is discharged from the first air outlet located in the first cavity, and the liquid continues to enter the first spray head through the first liquid outlet for a cyclic reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0032] Figure 1 This is a cross-sectional view of the gas washing tower in the utility model;

[0033] Figure 2 It is a schematic diagram of the structure of the utility model;

[0034] Figure 3 It is a partial cross-sectional view of the structure of the utility model.

[0035] In the figure: 1, scrubbing tower, 2, separation cylinder, 3, wire mesh demister, 201, first cavity, 202, second cavity, 203, first liquid inlet, 204, first liquid outlet, 205, first gas outlet, 4, first spray head, 5, crystal separator, 6, first compressor, 7, first pump body, 8, Y-type filter, 9, second pump body, 10, discharge pump, 11, evaporator, 12, liquid level meter, 13, second spray head, 1301, ball nozzle, 14, air inlet pipe. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0037] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0038] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0039] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0040] Reference Figure 1~Figure 3 , which is the first embodiment of the utility model, proposes a scrubbing system for wastewater treatment, including a scrubbing tower 1, the scrubbing tower 1 includes a separation cylinder 2; a wire mesh demister 3 is arranged in the separation cylinder 2, the wire mesh demister 3 divides the separation cylinder 2 into a first cavity 201 and a second cavity 202, the second cavity 202 has a first liquid inlet 203 and a first liquid outlet 204, the first cavity 201 has a first gas outlet 205; the outlet of the air inlet pipe 14 passes through the wire mesh demister 3 and is located in the second cavity 202; there are a plurality of first spray heads 4, the first spray heads 4 are arranged in the air inlet pipe 14, and the first spray heads 4 are connected to the first liquid outlet 204.

[0041] In this embodiment, a scrubbing system is designed, whose core component is a scrubbing tower 1. The scrubbing tower 1 includes a separation cylinder 2, a wire mesh demister 3, an air inlet pipe 14, and a first spray head 4. The wire mesh demister 3 divides the separation cylinder 2 into a first cavity 201 and a second cavity 202. A first gas outlet 205 is arranged in the first cavity 201, and a first liquid inlet 203 and a first liquid outlet 204 are arranged in the second cavity 202.

[0042] Specifically, the reaction liquid enters the separation cylinder 2 from the first liquid inlet 203 and enters the first spray head 4 from the first liquid outlet 204. When the gas to be treated enters the air inlet pipe 14, the first spray head 4 in the air inlet pipe 14 sprays the reaction liquid. After the gas to be treated and the reaction liquid are fully reacted in the air inlet pipe 14, they enter the second cavity 202 of the separation cylinder 2 together. The gas passes through the wire mesh demister 3 in the separation cylinder 2 to remove the mist. After the removal is completed, the gas is discharged from the first air outlet 205 located in the first cavity 201, and the liquid continues to enter the first spray head 4 through the first liquid outlet 204 to carry out a cyclic reaction.

[0043] Furthermore, it also includes a crystal separator 5 , and the secondary steam outlet of the crystal separator 5 is connected to the air inlet pipe 14 ; the air inlet of the first compressor 6 is connected to the first air outlet 205 .

[0044] In this embodiment, the scrubbing system also includes a crystal separator 5 and a first compressor 6. The gas to be treated is discharged from the crystal separator 5. After the scrubbing tower 1 treats the gas, the gas enters the first compressor 6. By filtering the waste gas by the scrubbing tower 1, the waste gas can be prevented from entering the first compressor 6, which can greatly extend the service life of the first compressor 6.

[0045] Furthermore, it also includes a first pump body 7, the first liquid outlet 204 is connected to the first spray head 4 through the first pump body 7, and the outlet of the first pump body 7 is also connected in parallel to the material inlet of the crystallization separator 5; the first liquid outlet 204 is connected to the first pump body 7 through a Y-type filter 8.

[0046] In this embodiment, the gas washing system also includes a first pump body 7 and a Y-type filter 8. The reaction liquid is pumped out from the first liquid outlet 204 into the Y-type filter 8 by the pressure provided by the first pump body 7. After the filtration is completed, it enters the first spray head 4 using the pressure provided by the first pump body 7. When the content of a certain substance in the repeatedly circulated reaction liquid reaches the standard, it re-enters the crystallization separator 5 for reaction, and the new reaction liquid enters the separation cylinder 2 from the first liquid inlet 203 for continuous circulation.

[0047] Furthermore, it also includes a second pump body 9, the material outlet of the crystallizer separator 5 is connected to the inlet of the second pump body 9; the discharge pump 10 is connected to the outlet of the second pump body 9; the outlet of the second pump body 9 is also connected to the inlet of the evaporator 11, and the outlet of the evaporator 11 is connected to the material inlet of the crystallizer separator 5.

[0048] In this embodiment, the gas washing system also includes a second pump body 9, a discharge pump 10, and an evaporator 11. The inlet of the second pump body 9 is connected to the material outlet of the crystallizer separator 5 to provide pressure inside the pipeline. The outlet of the second pump body 9 is connected in parallel with the discharge pump 10 and the evaporator 11. The outlet of the evaporator 11 is connected to the crystallizer separator 5. The secondary steam generated by the evaporator 11 returns to the crystallizer separator 5 to react again.

[0049] Furthermore, the height of the separation cylinder 2 is at least twice the diameter of the separation cylinder 2 .

[0050] In this embodiment, the height of the separation cylinder 2 is at least twice its diameter. The advantage is that the gas will not directly enter the liquid from the air inlet pipe 14, so that the gas has space to pass through, allowing the gas to be reacted to enter the first compressor 6 through the first air outlet 205.

[0051] Furthermore, it also includes a liquid level meter 12, which is arranged on the side wall of the separation cylinder 2, and the distance between the liquid level detected by the sensing point on the liquid level meter 12 and the outlet of the air inlet pipe 14 is at least 0.5m.

[0052] In this embodiment, the distance between the liquid level detected by the sensing point on the liquid level meter 12 and the outlet of the air inlet pipe 14 is at least 0.5m. If the upper part of the liquid level meter 12 is too high, the incoming reacted gas will disturb the liquid, causing inaccurate measurement by the liquid level meter 12.

[0053] Furthermore, it also includes a second shower head 13 , which is disposed in the first cavity 201 .

[0054] In this embodiment, the second spray head 13 is disposed in the first cavity 201 and is used to flush the wire mesh demister 3 .

[0055] Furthermore, both the first spray head 4 and the second spray head 13 have a ball-shaped nozzle 1301 .

[0056] In this embodiment, both the first spray head 4 and the second spray head 13 have a ball-end nozzle 1301 . The ball-end nozzle 1301 can perform 360° spraying, so that the reaction liquid and the gas to be reacted react more fully.

[0057] Furthermore, the vertical distance between adjacent first spray heads 4 is 1-2 m.

[0058] In this embodiment, the vertical spacing between the first shower heads 4 is 1-2 m, so that the reaction liquid and the gas to be reacted can react better.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A gas scrubbing system for wastewater treatment, characterized in that: The invention comprises a scrubbing tower (1), wherein the scrubbing tower (1) comprises: Separation cylinder (2); a wire mesh demister (3), the wire mesh demister (3) being arranged in the separation cylinder (2), the wire mesh demister (3) dividing the separation cylinder (2) into a first cavity (201) and a second cavity (202), the second cavity (202) having a first liquid inlet (203) and a first liquid outlet (204), and the first cavity (201) having a first gas outlet (205); An air intake pipe (14), an outlet of the air intake pipe (14) passing through the wire mesh demister (3) and located in the second cavity (202); A first spray head (4), wherein the first spray heads (4) are provided in a plurality, the first spray heads (4) are arranged in the air inlet pipe (14), and the first spray heads (4) are connected to the first liquid outlet (204).

2. A wastewater treatment scrubbing system according to claim 1, characterized in that: Also includes: A crystal separator (5), wherein a secondary steam outlet of the crystal separator (5) is in communication with the air inlet pipe (14); A first compressor (6), wherein an air inlet of the first compressor (6) is in communication with the first air outlet (205).

3. A wastewater treatment scrubbing system according to claim 2, characterized in that: Also includes: A first pump body (7), wherein the first liquid outlet (204) is connected to the first spray head (4) through the first pump body (7), and the outlet of the first pump body (7) is also connected in parallel to the material inlet of the crystallizer (5); A Y-shaped filter (8), wherein the first liquid outlet (204) is connected to the first pump body (7) through the Y-shaped filter (8).

4. A wastewater treatment scrubbing system according to claim 3, characterized in that: Also includes: a second pump body (9), wherein the material outlet of the crystal separator (5) is in communication with the inlet of the second pump body (9); a discharge pump (10), the discharge pump (10) being in communication with an outlet of the second pump body (9); The evaporator (11) is connected to the inlet of the evaporator (11) through the outlet of the second pump body (9), and the outlet of the evaporator (11) is connected to the material inlet of the crystallizer (5).

5. A wastewater treatment scrubbing system according to claim 1, characterized in that: The height of the separation cylinder (2) is at least twice the diameter of the separation cylinder (2).

6. A wastewater treatment scrubbing system according to claim 1, characterized in that: Also includes: A liquid level meter (12), wherein the liquid level meter (12) is arranged on the side wall of the separation cylinder (2), and the distance between the liquid level height detected by the sensing point on the liquid level meter (12) and the outlet of the air inlet pipe (14) is at least 0.5 m.

7. A wastewater treatment scrubbing system according to claim 1, characterized in that: Also includes: A second shower head (13), wherein the second shower head (13) is arranged in the first cavity (201).

8. A wastewater treatment scrubbing system according to claim 7, characterized in that: The first spray head (4) and the second spray head (13) both have a ball-end nozzle (1301).

9. A wastewater treatment scrubbing system according to claim 1, characterized in that: The vertical distance between adjacent first spray heads (4) is 1-2 m.

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