Ammonium sulfate byproduct treatment combined device suitable for chemical tail gas treatment

Abstract

The utility model discloses an ammonium sulfate by-product treatment combined device suitable for chemical tail gas treatment, which comprises an ammonium sulfate slurry tank, a horizontal-flow sedimentation tank and a vertical-flow sedimentation tank which are sequentially connected, and the horizontal-flow sedimentation tank and the vertical-flow sedimentation tank are both connected with a transfer pipeline used for extracting sludge from the bottom of the horizontal-flow sedimentation tank and a transfer pipeline used for extracting sludge from the bottom of the vertical-flow sedimentation tank. Compared with the prior art, the ammonium sulfate by-product treatment combined device suitable for chemical tail gas treatment disclosed by the utility model has the beneficial effects that the pretreatment device is arranged, so that a proper amount of ammonium sulfate solution can be extracted from sludge, which is about to be transferred to a sludge tank, of a horizontal-flow sedimentation tank; in addition, through the arrangement of the buffer bin, to-be-treated sludge can be prepared for sedimentation in advance in the sedimentation and liquid pumping process of the mother liquid pumping bin, and the situation that the sludge in the mother liquid pumping bin is impacted by flowing of the ammonium sulfate solution in the horizontal-flow sedimentation tank can be prevented; therefore, the settling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical tail gas treatment, in particular to an ammonium sulfate byproduct treatment combined device suitable for chemical tail gas treatment. Background Art

[0002] The treatment of ammonium sulfate tail gas generally involves a crystallization step. During crystallization, the ammonium sulfate tail gas is passed into a purifier and sprayed with an ammonium sulfate mother liquor. The ammonium sulfate tail gas contacts the sprayed mother liquor and is absorbed, thereby increasing the concentration of ammonium sulfate in the mother liquor and forming crystals. Prior art, such as the Chinese utility model patent with application number 202220702217.7, discloses an ammonium sulfate by-product treatment combined device suitable for chemical tail gas treatment, wherein the ammonium sulfate slurry pool, that is, the crystallization pool after the ammonium sulfate is sprayed with the mother liquor, is connected to a horizontal flow sedimentation tank, and then is processed through multiple procedures such as a vertical flow sedimentation tank, a buffer tank, a sludge tank, and a sludge filter press system to remove dust impurities and obtain relatively pure ammonium sulfate crystals.

[0003] However, with respect to the above-mentioned patented technology, the inventor believes that when using a horizontal flow sedimentation tank, most of the sludge will remain in the horizontal flow sedimentation tank and settle under the action of gravity, and only a small amount of sludge will flow into the vertical flow sedimentation tank from above the water flow. When using a transfer pump to directly extract the sludge at the bottom of the vertical flow sedimentation tank, a large amount of ammonium sulfate solution will inevitably be extracted. In this way, the transfer pump will pump a large amount of ammonium sulfate solution into the sludge pool, making the sedimentation process of the sludge pool slow. Therefore, the present application proposes an ammonium sulfate by-product treatment combination device suitable for chemical exhaust gas treatment, the purpose of which is to be able to extract an appropriate amount of ammonium sulfate solution from the sludge to be extracted by the transfer pump in advance, thereby reducing the ammonium sulfate solution in the sludge pool as much as possible and accelerating the sedimentation process of the sludge pool. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an ammonium sulfate by-product treatment assembly suitable for chemical tail gas treatment to solve the above problems.

[0005] To achieve the above-mentioned purpose, the utility model discloses an ammonium sulfate by-product treatment combined device suitable for chemical tail gas treatment, comprising an ammonium sulfate slurry pool, a horizontal flow sedimentation tank and a vertical flow sedimentation tank connected in sequence, the horizontal flow sedimentation tank and the vertical flow sedimentation tank are both connected with a transfer pipeline for extracting sludge from the bottom, a sludge pretreatment device is provided at the bottom of the horizontal flow sedimentation tank, the pretreatment device comprises an outer shell, the outer shell comprises a buffer bin connected to the bottom of the horizontal flow sedimentation tank and a mother liquor extraction bin arranged at the bottom of the buffer bin; an isolation mechanism is provided between the buffer bin and the mother liquor extraction bin; the mother liquor extraction bin is connected with a slurry extraction mechanism for extracting supernatant into the horizontal flow sedimentation tank.

[0006] Preferably, a baffle is provided at the mouth of the buffer bin.

[0007] Preferably, a laser transmitter and a laser receiver are respectively provided on both sides of the inner wall of the mother liquid extraction chamber.

[0008] Preferably, the slurry extraction mechanism includes an extraction pipe and an extraction pump, one end of the extraction pipe is arranged on the upper side of the mother liquor extraction chamber, the other end of the extraction pipe is arranged above the horizontal flow sedimentation tank, and the extraction pump is arranged on the extraction pipe.

[0009] Preferably, the baffle is rotatably connected to the mouth of the buffer bin, and the buffer bin is equipped with a power mechanism for driving the baffle to rotate.

[0010] Preferably, the isolation mechanism is an electric gate.

[0011] Preferably, the extraction pipe is equipped with a flow meter.

[0012] Compared with the prior art, the utility model has the following benefits: 1) The utility model is an ammonium sulfate by-product treatment combined device suitable for chemical tail gas treatment. Through the setting of a pretreatment device, the utility model can extract an appropriate amount of ammonium sulfate solution from the sludge that is about to be transferred from the horizontal flow sedimentation tank to the sludge tank, so as to prevent excessive ammonium sulfate solution from entering the sludge tank and affecting the sedimentation speed; 2) In addition, through the setting of a buffer bin, the sludge to be treated can be prepared for sedimentation in advance during the sedimentation and extraction of the mother liquor extraction bin, and the flow of ammonium sulfate solution in the horizontal flow sedimentation tank can be prevented from causing impact on the sludge in the mother liquor extraction bin, thereby improving the sedimentation efficiency; 3) In addition, the utility model is convenient for monitoring the concentration of the sludge in the mother liquor extraction bin and the amount of ammonium sulfate solution extracted through the setting of a laser transmitter, a laser receiver and a flow meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of the structure of the utility model.

[0015] In the figure: 10, ammonium sulfate slurry pool; 20, horizontal flow sedimentation tank; 30, vertical flow sedimentation tank; 40, transfer pipeline; 50, buffer bin; 51, baffle; 52, power mechanism; 60, mother liquor extraction bin; 61, laser transmitter; 62, laser receiver; 70, isolation mechanism; 80, slurry extraction mechanism; 81, extraction pump; 82, extraction pipe; 83, flow meter. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1 The specific implementation modes of the present utility model are further described in detail.

[0017] Depend on Figure 1 The utility model provides an ammonium sulfate byproduct treatment combined device suitable for chemical tail gas treatment, comprising an ammonium sulfate slurry pool 10, a horizontal flow sedimentation tank 20 and a vertical flow sedimentation tank 30 connected in sequence, the horizontal flow sedimentation tank 20 and the vertical flow sedimentation tank 30 are both connected to a transfer pipeline 40 for extracting sludge from the bottom. The above structure is an existing ammonium sulfate byproduct treatment combined device, so in this embodiment, it is not described in detail. The key improvements of this embodiment are:

[0018] A sludge pretreatment device is provided at the bottom of the horizontal flow sedimentation tank 20, and the pretreatment device includes an outer shell, which includes a buffer bin 50 connected to the bottom of the horizontal flow sedimentation tank 20 and a mother liquor extraction bin 60 arranged at the bottom of the buffer bin 50, wherein the buffer bin 50 is used to temporarily store sludge, and is used to transfer the sludge in the buffer bin 50 to the mother liquor extraction bin 60 when the sludge in the mother liquor extraction bin 60 is extracted. When the sludge in the mother liquor extraction bin 60 begins to settle and the mother liquor is extracted, the buffer bin 50 is used to prepare the sludge to be treated next time.

[0019] An isolation mechanism 70 is provided between the buffer bin 50 and the mother liquid extraction bin 60. The ammonium sulfate slurry enters the horizontal flow sedimentation tank 20 through the ammonium sulfate slurry pool 10, and the sludge settles to the bottom of the mother liquid extraction bin 60. When there is a lot of sludge at the bottom of the mother liquid extraction bin 60, the mother liquid extraction bin 60 is separated and settled by the isolation mechanism 70, so that the supernatant can be obtained at the upper part of the mother liquid extraction bin 60.

[0020] The mother liquor extraction chamber 60 is connected to a slurry extraction mechanism 80 for extracting supernatant liquid into the horizontal flow sedimentation tank 20. An appropriate amount of supernatant liquid is extracted through the slurry extraction mechanism 80, and then the sludge in the mother liquor extraction chamber 60 is sent to the sludge tank through a transfer pipeline, which can shorten the sedimentation time of the sludge in the sludge tank as much as possible.

[0021] Furthermore, a baffle 51 is provided at the mouth of the buffer bin 50. As described above, when there is a lot of sludge in the mother liquid extraction bin 60, the isolation mechanism 70 begins to isolate the mother liquid extraction bin 60. When the sludge in the mother liquid isolation bin 60 begins to settle, the baffle 51 can be closed. Then, when the sludge in the mother liquid extraction bin 60 is discharged, the isolation mechanism 70 is opened, so that the mixture of ammonium sulfate solution and sludge in the buffer bin 50 can be replenished into the mother liquid extraction bin 60. During the replenishment process, the baffle 51 enables the pretreatment device and the horizontal flow sedimentation tank 20 to prevent the sewage in the horizontal flow sedimentation tank 20 from impacting the mother liquid isolation bin 60, so that the sludge can settle faster after entering the mother liquid isolation bin 60.

[0022] A laser emitter 61 and a laser receiver 62 are respectively provided on both sides of the inner wall of the mother liquor extraction chamber 60. There are multiple laser emitters 61 and multiple laser receivers 62. When the concentration of the sludge increases, the laser that the laser receiver 62 can receive will also decrease. This can be used to determine the amount of sludge.

[0023] In this embodiment, the slurry extraction mechanism 80 includes an extraction pipe 81 and an extraction pump 82. One end of the extraction pipe 81 is arranged on the upper side of the mother liquor extraction chamber 60, and the other end of the extraction pipe 81 is arranged above the horizontal flow sedimentation tank 20. The extraction pump 82 is arranged on the extraction pipe 81. The extraction pump 82 extracts the supernatant through the extraction pipe 81 and returns it to the horizontal flow sedimentation tank 20, which can reduce waste and prevent excessive ammonium sulfate solution in the sludge.

[0024] The baffle 51 is rotatably connected to the mouth of the buffer bin 50 , and the buffer bin 50 is equipped with a power mechanism 52 for driving the baffle 51 to rotate. In this embodiment, there are two baffles 51 at the mouth of each buffer bin 50 , and the power mechanism 52 is a motor.

[0025] In this embodiment, the isolation mechanism 70 is an electric gate.

[0026] In order to control the amount of supernatant extracted and prevent the sludge from being too dry and affecting transportation, a flow meter 83 is installed on the extraction pipe.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An ammonium sulfate byproduct treatment combined device suitable for chemical tail gas treatment, comprising an ammonium sulfate slurry pool (10), a horizontal flow sedimentation tank (20) and a vertical flow sedimentation tank (30) connected in sequence, wherein the horizontal flow sedimentation tank (20) and the vertical flow sedimentation tank (30) are both connected to a transfer pipeline (40) for extracting sludge from the bottom, characterized in that: A sludge pretreatment device is provided at the bottom of the horizontal flow sedimentation tank (20), wherein the pretreatment device comprises an outer shell, wherein the outer shell comprises a buffer bin (50) connected to the bottom of the horizontal flow sedimentation tank (20) and a mother liquor extraction bin (60) arranged at the bottom of the buffer bin (50); An isolation mechanism (70) is provided between the buffer bin (50) and the mother liquid extraction bin (60); The mother liquid extraction chamber (60) is connected to a slurry extraction mechanism (80) for extracting supernatant liquid into a horizontal flow sedimentation tank (20).

2. The ammonium sulfate byproduct treatment combined device suitable for chemical tail gas treatment according to claim 1, characterized in that: The mouth of the buffer bin (50) is provided with a baffle (51).

3. The ammonium sulfate byproduct treatment combined device suitable for chemical tail gas treatment according to claim 1, characterized in that: A laser transmitter (61) and a laser receiver (62) are respectively provided on both sides of the inner wall of the mother liquid extraction chamber (60).

4. The ammonium sulfate byproduct treatment combined device suitable for chemical tail gas treatment according to claim 1, characterized in that: The slurry extraction mechanism (80) comprises an extraction pipe (81) and an extraction pump (82), one end of the extraction pipe (81) is arranged on the upper end side of the mother liquor extraction chamber (60), the other end of the extraction pipe (81) is arranged above the horizontal flow sedimentation tank (20), and the extraction pump (82) is arranged on the extraction pipe (81).

5. The combined device for treating ammonium sulfate byproducts suitable for treating chemical tail gas according to claim 2, characterized in that: The baffle (51) is rotatably connected to the mouth of the buffer bin (50), and the buffer bin (50) is equipped with a power mechanism (52) for driving the baffle (51) to rotate.

6. The combined device for treating ammonium sulfate byproducts suitable for treating chemical tail gas according to claim 1, characterized in that: The isolation mechanism (70) is an electric gate.

7. The combined device for treating ammonium sulfate byproducts suitable for treating chemical tail gas according to claim 4, characterized in that: The extraction pipe is equipped with a flow meter (83).

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