Coking desulfurization waste liquid pretreatment aeration device

Abstract

The utility model relates to a coking desulfurization waste liquid pretreatment aeration device which comprises a tank body and an aeration assembly, and the bottom of the side wall of the tank body is connected with at least one first liquid inlet; the first liquid inlet is formed in the tangential direction of the inner wall of the tank body; the bottom of the side wall of the tank body is connected with a liquid outlet; a liquid outlet valve is mounted on the liquid outlet; and the aeration assembly is arranged in the tank body. Desulfurization waste liquid enters the tank body from the first liquid inlet along the tangential direction and annularly flows, so that the desulfurization waste liquid in the tank body forms rotational flow, solid sedimentation is reduced, and the contact area and the contact time of oxygen in air are increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the desulfurization waste liquid pretreatment device technical field, especially relates to a coking desulfurization waste liquid pretreatment aeration device. BACKGROUND

[0002] For a long time, the waste liquid produced by coking wet desulfurization has been a relatively difficult problem to handle, and the sulfur and by-products in the waste liquid affect the entire desulfurization process. The pretreatment process currently applied to the salt extraction of coking desulfurization waste liquid generally uses an aeration method, including acid aeration and acid-free aeration, to convert ammonium thiosulfate in the waste liquid into ammonium sulfate, ammonium thiocyanate, and elemental sulfur. Generally, a side stirring method is used to stir the waste liquid in the aeration tank to facilitate the contact between the waste liquid and oxygen in the air. A Chinese patent with publication number CN218841852U discloses an aeration device for oxidized desulfurization waste liquid, which uses a stirring device to stir the waste liquid in the aeration tank. However, the use of side stirring has poor sealing effect after a certain period of time, and the desulfurization waste liquid can easily leak out of the side stirring, polluting the environment. SUMMARY

[0003] The utility model aims at providing a coking desulfurization waste liquid pretreatment aeration device, which can make the desulfurization waste liquid flow automatically in a ring shape.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a coking desulfurization waste liquid pretreatment aeration device, which comprises a tank body and an aeration assembly,

[0005] The bottom of the side wall of the tank body is connected with at least one first liquid inlet; the first liquid inlet is arranged in a tangential direction along the inner wall of the tank body; the bottom of the side wall of the tank body is connected with a liquid outlet; a liquid outlet valve is installed on the liquid outlet;

[0006] The aeration assembly is arranged in the tank body.

[0007] Preferably, the aeration assembly comprises an aeration main pipe and a plurality of aeration branch pipes; the aeration main pipe is vertically arranged in the tank body; the plurality of aeration branch pipes are uniformly distributed in a circumferential direction of the aeration main pipe, and each aeration branch pipe is in communication with the aeration main pipe; each aeration branch pipe is provided with a plurality of aeration holes; the side wall of the tank body is connected with a first air inlet; one end of the aeration main pipe, which is away from the aeration branch pipes, is connected with the first air inlet.

[0008] Preferably, the utility model further comprises a defoaming assembly, which comprises a defoaming main pipe and at least one defoaming branch pipe; the defoaming main pipe is vertically arranged at the top of the tank body; one end of the at least one defoaming branch pipe is connected with the bottom end of the defoaming main pipe, and the other end extends obliquely downward; the top of the tank body is connected with a second liquid inlet; the top end of the defoaming main pipe is connected with the second liquid inlet.

[0009] Preferably, a circulating pump is further included, a water inlet of the circulating pump is connected with the liquid outlet through a pipeline, and a water outlet of the circulating pump is connected with each first liquid inlet through a pipeline.

[0010] Preferably, a circulating pump is further included, a water inlet of the circulating pump is connected with the liquid outlet through a pipeline, and a water outlet of the circulating pump is connected with each first liquid inlet and second liquid inlet through a pipeline.

[0011] Preferably, the tank body is provided with a heating coil, a second gas inlet and a steam condensate outlet are connected with the side wall of the tank body, one end of the heating coil is connected with the second gas inlet, and the other end of the heating coil is connected with the steam condensate outlet.

[0012] Preferably, the heating coil is divided into multiple sections of coil, each section of coil is vertically arranged, and adjacent sections of coil are sequentially connected, and steam sequentially passes through the second gas inlet, the multiple sections of coil and the steam condensate outlet.

[0013] Compared with the prior art, the coking desulfurization waste liquid pretreatment aeration device has the following advantages:

[0014] (1) The desulfurization waste liquid is introduced into the tank body from the first liquid inlet in a tangential direction to form annular flow, so that the desulfurization waste liquid in the tank body forms a cyclone, the settlement of solids is reduced, and the contact area and contact time of oxygen in the air are increased;

[0015] (2) Compressed air is used, which can avoid clogging of the aeration head and improve the aeration pressure, thereby improving the reaction efficiency of conversion of ammonium thiosulfate to ammonium sulfate;

[0016] (3) The desulfurization waste liquid is sequentially introduced into the defoaming main pipe and the defoaming branch pipe, and is sprayed from the defoaming branch pipe to the liquid surface in the tank body to eliminate sulfur foam;

[0017] (4) The device is simple in design and easy to use. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model discloses a structure schematic diagram. DETAILED DESCRIPTION

[0019] The utility model will be further explained in connection with the drawings and specific embodiments.

[0020] As Figure 1 shown, a coking desulfurization waste liquid pretreatment aeration device includes a tank body 1 and an aeration assembly,

[0021] The first liquid inlet 11 is arranged along the tangent direction of the inner wall of the tank body 1, and the desulfurization waste liquid enters the tank body 1 along the tangent direction from the first liquid inlet 11 to form a circular flow, so that the desulfurization waste liquid in the tank body 1 forms a spiral flow, reduces the sedimentation of solids, and increases the contact area and contact time of oxygen in the air.

[0022] The aeration assembly is arranged in the tank body 1 and is used for introducing compressed air into the desulfurization waste liquid in the tank body 1.

[0023] The aeration assembly includes an aeration main pipe 21 and a plurality of aeration branch pipes 22. The aeration main pipe 21 is arranged in the middle of the tank body 1. The plurality of aeration branch pipes 22 are uniformly distributed along the circumferential direction of the aeration main pipe 21, and each aeration branch pipe 22 is in communication with the aeration main pipe 21. Each aeration branch pipe 22 is provided with a plurality of aeration holes. The side wall of the tank body 1 is connected with a first air inlet 13. One end of the aeration main pipe 21 away from the aeration branch pipe 22 is connected with the first air inlet 13. The first air inlet 13 is connected with an external air source through an air inlet pipe, and the aeration main pipe 21 is supplied with compressed air from the external air source. After passing through the aeration main pipe 21, the compressed air enters the plurality of aeration branch pipes 22 and then enters the desulfurization waste liquid through the aeration holes. The plurality of aeration branch pipes 22 are uniformly distributed along the circumferential direction of the aeration main pipe 21, which facilitates increasing the contact area of the desulfurization waste liquid and oxygen in the compressed air. In addition, the compressed air is used, which can avoid clogging of the aeration head and improve the aeration pressure, thereby improving the reaction efficiency of the conversion of ammonium thiosulfate into ammonium sulfate. In other embodiments, the first air inlet 13 can also be connected with the compressed air pipe of the desulfurization device to introduce the remaining compressed air of the desulfurization device into the tank body 1, thereby reducing energy consumption.

[0024] In this embodiment, a defoaming assembly is further included. The defoaming assembly includes a defoaming main pipe 31 and at least one defoaming branch pipe 32. The defoaming main pipe 31 is vertically arranged at the top of the tank body 1. One end of the at least one defoaming branch pipe 32 is connected with the bottom end of the defoaming main pipe 31, and the other end extends obliquely downward. The defoaming branch pipe 32 is above the liquid surface of the tank body 1. The top of the tank body 1 is connected with a second liquid inlet 14. The second liquid inlet 14 is provided with a liquid inlet valve. When defoaming is needed, the liquid inlet valve is opened, and the waste liquid enters the defoaming main pipe 31. The top end of the defoaming main pipe 31 is connected with the second liquid inlet 14, and the desulfurization waste liquid is introduced into the second liquid inlet 14. The desulfurization waste liquid enters the defoaming main pipe 31 and the defoaming branch pipe 32 in sequence and is sprayed out of the defoaming branch pipe 32 to the liquid surface in the tank body 1 to eliminate the sulfur foam.

[0025] In the embodiment, a circulating pump is further included, a water inlet of the circulating pump is connected with the liquid outlet 12 through a pipeline, and a water outlet of the circulating pump is connected with each of the first liquid inlet 11 and the second liquid inlet 14 through a pipeline. A part of the waste liquid discharged from the liquid outlet 12 is pumped into the first liquid inlet 11 again by the circulating pump, so that the waste liquid in the tank 1 flows in a ring shape all the time, avoiding incomplete aeration of the waste liquid. Another part of the waste liquid is pumped into the second liquid inlet 14 to eliminate the sulfur foam. After the aeration is completed, the circulating pump is stopped, and the waste liquid is conveyed to the next process. In other embodiments, a liquid outlet can also be arranged at the bottom of the side wall of the tank 1, and a liquid outlet valve is arranged on the liquid outlet. After the aeration is completed, the waste liquid in the tank 1 is discharged through the liquid outlet and conveyed to the next process.

[0026] In the embodiment, the tank 1 is provided with a heating coil 4, a second air inlet 15 and a steam condensate outlet 16 are connected with the side wall of the tank 1, one end of the heating coil 4 is connected with the second air inlet 15, and the other end is connected with the steam condensate outlet 16. The second air inlet 15 is connected with an external steam source through a pipeline. The external steam source conveys low-pressure steam into the second air inlet 15, and then into the heating coil 4, so as to exchange heat with the waste liquid, uniformly heat the waste liquid, improve the aeration efficiency, and change the steam into steam condensate after heat exchange, which is discharged from the steam condensate outlet 16.

[0027] In the embodiment, the heating coil 4 is divided into multiple sections of coil. Each section of the coil is vertically arranged, and adjacent sections of the coil are connected in sequence. The steam passes through the second air inlet 15, the multiple sections of coil and the steam condensate outlet 16 in sequence. The multiple sections of coil increase the heat exchange area between the heating coil 4 and the waste liquid, so as to facilitate uniform heating of the waste liquid.

[0028] The utility model uses method: will desulfurization waste liquid into circulating pump, opens circulating pump, circulating pump will desulfurization waste liquid pump into first liquid inlet 11, the waste liquid liquid level in jar body 1 rises, and desulfurization waste liquid enters jar body 1 along tangent direction from first liquid inlet 11, does annular flow, makes the desulfurization waste liquid in jar body 1 form cyclone. Will compressed air and low pressure steam respectively into first gas inlet 13 and second gas inlet 15, and compressed air enters multiple aeration branch pipe 22 after aeration main pipe 21, enters desulfurization waste liquid through several aeration holes, carries out aeration to desulfurization waste liquid, and low pressure steam enters heating coil 4, and exchanges heat with waste liquid, makes waste liquid even heat. Simultaneously opens liquid inlet valve, and circulating pump pumps a part of waste liquid into second liquid inlet 14, and desulfurization waste liquid enters defoaming main pipe 31 and defoaming branch pipe 32 in proper order, and sprays from defoaming branch pipe 32, and sprays to the liquid level in jar body 1, and eliminates sulfur foam. When liquid level rises certain height, and the outside does not again into jar desulfurization waste liquid, opens liquid outlet valve, and through circulating pump, a part of waste liquid that liquid outlet 12 discharges is pumped into first liquid inlet 11 again, makes the waste liquid in jar body 1 always annular flow, and another part of waste liquid is pumped into second liquid inlet 14, and eliminates sulfur foam, and when aeration is completed, and waste liquid is passed into next procedure.

Claims

1. A coking desulfurization waste liquid pretreatment aeration device characterized by, The aeration assembly is arranged in the tank body (1). The aeration assembly is arranged in the tank body (1). The aeration assembly includes an aeration main pipe (21) and a plurality of aeration branch pipes (22); the aeration main pipe (21) is arranged in the tank body (1); the plurality of aeration branch pipes (22) are uniformly distributed along the circumferential direction of the aeration main pipe (21), and each aeration branch pipe (22) is in communication with the aeration main pipe (21); each aeration branch pipe (22) is provided with a plurality of aeration holes; the side wall of the tank body (1) is connected with a first air inlet (13); one end of the aeration main pipe (21) away from the aeration branch pipe (22) is connected with the first air inlet (13).

2. The coking desulfurization waste liquid pretreatment aeration device according to claim 1, characterized in that, The defoaming assembly includes a defoaming main pipe (31) and at least one defoaming branch pipe (32); the defoaming main pipe (31) is vertically arranged at the top of the tank body (1); one end of the at least one defoaming branch pipe (32) is connected with the bottom end of the defoaming main pipe (31), and the other end extends obliquely downward; the top of the tank body (1) is connected with a second liquid inlet (14); the top end of the defoaming main pipe (31) is connected with the second liquid inlet (14).

3. The coking desulfurization waste liquid pretreatment aeration device according to claim 1, characterized in that, The circulating pump is further connected with the liquid outlet (12) through a pipeline, and the outlet of the circulating pump is connected with each first liquid inlet (11) through a pipeline.

4. The coking desulfurization waste liquid pretreatment aeration device according to claim 1, characterized in that, The circulating pump is further connected with the liquid outlet (12) through a pipeline, and the outlet of the circulating pump is connected with each first liquid inlet (11) and the second liquid inlet (14) through a pipeline.

5. The coking desulfurization waste liquid pretreatment aeration device according to claim 3, characterized in that, The tank body (1) is provided with a heating coil (4); the side wall of the tank body (1) is connected with a second air inlet (15) and a steam condensate outlet (16); one end of the heating coil (4) is connected with the second air inlet (15), and the other end is connected with the steam condensate outlet (16).

6. The coking desulfurization waste liquid pretreatment aeration device according to claim 1, characterized in that, The heating coil (4) is divided into a plurality of sections of coil; each section of coil is vertically arranged, and adjacent sections of coil are connected in sequence; steam passes through the second air inlet (15), the plurality of sections of coil and the steam condensate outlet (16) in sequence.

7. The coking desulfurization waste liquid pretreatment aeration device according to claim 6, characterized in that, ​

Images