A chemical waste gas dust treatment device

Abstract

A chemical waste gas dust treatment device relates to the field of chemical tail gas dust removal, comprising a dust removal box (1), and a gas primary filter mechanism (4), a foam dust removal mechanism (3) and a gas discharge mechanism (2) arranged in the dust removal box (1), wherein the gas primary filter mechanism (4) comprises a primary filter box (41), an absorbent supply assembly (43) and an air supply assembly (44), and the foam dust removal mechanism (3) is used to perform foam adsorption on the gas discharged from the gas primary filter mechanism (4). The foam dust removal mechanism (3) comprises a foam agent supply assembly (31), a foam absorption assembly (32) and an air supply pipe (33) arranged inside the dust removal box (1). The chemical waste gas dust treatment device of the embodiment of the present invention passes dust particles into the absorbent for preliminary absorption, and for the escaped particles that are not absorbed, the dust is wrapped in the foam particles with a very large surface area, so that the dust is fully and thoroughly absorbed, and the organic dust particles are completely removed.

Description

Technical Field

[0001] The invention relates to the field of chemical waste gas dust removal, and in particular to a chemical waste gas dust treatment device. Background Art

[0002] The production process of chemical plants often produces tail gas containing various pollutants, among which dust is an important component. Traditional tail gas dust removal technologies mainly include mechanical dust removal and wet dust removal. Mechanical dust removal removes dust by filtering or centrifugation. Wet dust removal uses water or other liquids to contact the tail gas to capture the dust. With the continuous improvement of environmental protection requirements, the requirements for tail gas dust removal technology in chemical plants are becoming increasingly stringent. Modern dust removal technologies are constantly developing, such as electrostatic precipitators and bag filters. Electrostatic precipitators use electric fields to charge and capture dust, but they may have unstable performance under conditions of high temperature and high humidity. Bag filters remove dust through filtering materials and have high dust removal efficiency, but filter bags need to be replaced regularly. In addition, catalyst technology is also widely used in tail gas treatment. By adding catalysts to tail gas, the conversion and decomposition of harmful substances can be promoted and the generation of dust can be reduced.

[0003] However, there are still some challenges in the current exhaust dust removal technology. For example, for some dusts with special chemical properties, the organic matter attached to their surface is difficult to dissolve. For example, after some large particles of organic dust come into contact with the adsorbent, the adsorbent is difficult to reach the inside of the particles, resulting in the dust particles being difficult to fully contact in time, and many smaller particles of dust will escape, resulting in low adsorption efficiency. Therefore, the staff have to filter multiple times, increase the dust removal process, and increase the energy consumption, maintenance cost and unreliability of the dust removal equipment. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the purpose of the present invention is to provide a chemical waste gas dust treatment device, in which the dust particles are fully in contact with the foam, the dust is fully and thoroughly absorbed, and the organic dust particles are completely removed.

[0006] To achieve the above-mentioned purpose, an embodiment of the present invention proposes a chemical waste gas dust treatment device, comprising a dust removal box, and a gas preliminary filter mechanism, a foam dust removal mechanism and a gas exhaust mechanism arranged in the dust removal box, wherein the gas preliminary filter mechanism comprises a preliminary filter box, an absorbent supply assembly and an air supply assembly, wherein the preliminary filter box is arranged on one side of the dust removal box for preliminary solution adsorption of waste gas dust, the air supply assembly is arranged at the air inlet end of the preliminary filter box, the air supply assembly comprises a jet disk arranged at the bottom of the preliminary filter box, the absorbent supply assembly is arranged inside the preliminary filter box, the absorbent supply assembly is used to replenish the absorbent for adsorbing dust, the air outlet end of the preliminary filter box is connected to the air inlet end of the gas exhaust mechanism, the foam dust removal mechanism is used to perform foam adsorption on the gas discharged by the gas preliminary filter mechanism, and the foam dust removal mechanism comprises a filter assembly arranged in the dust removal box. The foam absorption component of the part is connected with the air outlet end of the gas primary filter mechanism by setting an air supply pipe, the foam absorption component includes a foam generating box arranged in the dust removal box body, the surface of the foam generating box is provided with a foam outlet, the interior of the foam generating box is provided with a nozzle, the nozzle is connected with the air outlet end of the air supply pipe, the air inlet end of the air supply pipe is connected with the air outlet end of the primary filter box, the foam generating box is a spherical shell structure, the nozzle is arranged at the geometric center position of the foam generating box, the nozzle is a spherical structure, the outer surface of the nozzle is provided with a spherical radiating nozzle, the end of the foam outlet facing the inner wall of the foam generating box is provided with a concave drainage groove, the inner wall of the foam outlet is provided with a strip-shaped protrusion, and the top of the foam generating box is provided with a nozzle for spraying foaming agent, and the spraying direction of the nozzle is 360° horizontally.

[0007] Furthermore, a foam dust removal mechanism for performing foam adsorption on exhaust gas from the gas primary filtration mechanism is arranged inside the dust removal box, and the foam dust removal mechanism includes a foam agent supply assembly, a foam absorption assembly and an air supply pipe arranged inside the dust removal box, wherein the foam agent supply assembly is connected to the foam absorption assembly through a pipeline, and is used to feed the foam agent into the foam absorption assembly, and the foam absorption assembly includes a foam generating box arranged inside the dust removal box, a foam outlet is provided on the surface of the foam generating box, and a nozzle is arranged inside the foam generating box, and the nozzle is connected to the air outlet end of the air supply pipe, and the air inlet end of the air supply pipe is connected to the air outlet end of the primary filtration box.

[0008] Furthermore, the gas exhaust mechanism includes an exhaust pipe, an air intake base and a floating base, wherein the exhaust pipe is arranged at the top air outlet end of the dust removal box, a movable rod is slidably penetrated through the bottom of the exhaust pipe, a piston is arranged on the top of the movable rod, the movable rod is connected to the exhaust pipe, the air intake base is arranged at the bottom of the exhaust pipe, and the floating base is arranged at the bottom of the air intake base.

[0009] Furthermore, a steam-water separator is provided at the gas outlet end of the exhaust pipe, and an exhaust pump is provided between the exhaust pipe and the steam-water separator.

[0010] Furthermore, a pulse air pump is provided on the air supply pipe.

[0011] Furthermore, a flow stop rod is provided at the air inlet end of the air supply pipe.

[0012] Furthermore, the absorbent supply assembly includes a floating block and a liquid outlet nozzle, wherein the floating block is movably arranged inside the primary filter box, the liquid outlet nozzle is arranged on the upper surface of the floating block, and the opening of the liquid outlet nozzle corresponds to the flow stop rod up and down.

[0013] Furthermore, a flow-equalizing net plate is provided at the edge of the floating block, and guide rods are provided through the upper and lower parts of the floating block.

[0014] Beneficial effect: The present invention passes dust particles into the absorbent for preliminary absorption through the gas primary filtration mechanism. The unabsorbed escaped particles enter the foam dust removal mechanism, and the foam particles with a very large surface area wrap the dust therein. The dust particles are in full contact with the foam, and the dust is fully and thoroughly absorbed, thereby completely removing organic dust particles.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0017] Figure 1 A schematic diagram of the structure of a chemical waste gas dust treatment device according to an embodiment of the present invention;

[0018] Figure 2 It is a front cross-sectional view of a chemical waste gas and dust treatment device according to one embodiment of the present invention;

[0019] Figure 3 A partial cross-sectional view of a gas discharge mechanism in a chemical waste gas and dust treatment device according to an embodiment of the present invention;

[0020] Figure 4 A partial cross-sectional view of a foam dust removal mechanism in a chemical waste gas dust treatment device according to an embodiment of the present invention;

[0021] Figure 5 for Figure 4 A magnified view of middle;

[0022] Figure 6 The figure is a schematic cross-sectional structural diagram of a gas primary filtration mechanism in a chemical waste gas dust treatment device according to an embodiment of the present invention.

[0023] As shown in the figure: 1. dust removal box; 2. gas discharge mechanism; 21. exhaust pipe; 22. piston; 23. movable rod; 24. air intake base; 241. floating base; 25. steam-water separator; 26. exhaust pump; 3. foam dust removal mechanism; 31. foam agent supply assembly; 311. nozzle; 32. foam absorption assembly; 321. foam generating box; 322. foam outlet; 3221. drainage groove; 3222 , strip-shaped protrusions; 323, jet head; 33, air supply pipe; 331, pulse air pump; 4, gas primary filtration mechanism; 41, primary filtration box; 42, stop rod; 43, absorbent supply assembly; 431, floating block; 432, flow-equalizing mesh disk; 433, sliding sleeve; 434, protective plate; 435, guide rod; 436, liquid outlet nozzle; 44, air supply assembly; 441, jet disk; 442, jet nozzle; 443, air inlet pipe. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limitations of the present invention. On the contrary, embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0025] The chemical waste gas dust treatment device according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0026] like Figure 1 and Figure 2 As shown, the chemical waste gas dust treatment device provided by the embodiment of the present invention includes a dust removal box 1, and a gas primary filtration mechanism 4, a foam dust removal mechanism 3 and a gas discharge mechanism 2 arranged in the dust removal box 1.

[0027] The gas primary filter mechanism 4 includes a primary filter box 41, an absorbent supply assembly 43 and an air supply assembly 44, wherein the primary filter box 41 is arranged on one side of the dust removal box body 1, and is used for preliminary solution adsorption of exhaust gas dust, the air supply assembly 44 is arranged at the air inlet end of the primary filter box 41, and the air supply assembly 44 includes a jet disc 441 arranged at the bottom of the primary filter box 41, and the absorbent supply assembly 43 is arranged inside the primary filter box 41. The absorbent supply assembly 43 is used to replenish the absorbent for adsorbing dust, and the air outlet end of the primary filter box 41 is connected to the air inlet end of the gas discharge mechanism 2.

[0028] The foam dust removal mechanism 3 is used for foam adsorption of the gas discharged from the gas primary filtration mechanism 4 , and the foam dust removal mechanism 3 includes a foam agent supply component 31 , a foam absorption component 32 and an air supply pipe 33 arranged inside the dust removal box 1 .

[0029] The foam agent supply component 31 is connected to the foam absorption component 32 through a pipeline, and is used to feed the foam agent into the foam absorption component 32. The foam absorption component 32 includes a foam generating box 321 arranged inside the dust removal box 1. The surface of the foam generating box 321 is provided with a foam outlet 322. The interior of the foam generating box 321 is provided with a nozzle 323. The nozzle 323 is connected to the air outlet end of the air supply pipe 33. The air inlet end of the air supply pipe 33 is connected to the air outlet end of the primary filter box 41.

[0030] Specifically, the absorbent is first connected to the absorbent supply assembly 43 through a pipeline, and the absorbent is sent into the primary filter box 41. When the chemical exhaust dust is removed, the dust gas is sent into the jet disk 441 through the pipeline, and the dust gas is sprayed upward and discharged at the bottom of the primary filter box 41. The dust gas floats upward through the absorbent, and most of the dust particles are adsorbed by the absorbent, and a small part of the dust particles that are not decomposed in time escapes, and then the gas enters the air supply pipe 33.

[0031] The gas is then sent into the foam dust removal mechanism 3. First, the gas is sent to the nozzle 323 through the air supply pipe 33. The nozzle 323 discharges the gas to the inside of the foam generating box 321. At the same time, the foam agent supply component 31 sends the foam agent to the inner wall. As the gas inside the foam generating box 321 expands, the gas pushes the foam agent to leave the foam outlet 322. When the foam agent leaves the foam outlet 322, it generates bubbles under the action of surface tension and wraps the dust gas therein, which is discharged from the foam outlet 322 together. Then the foam gradually falls into the dust removal box 1. The ultra-large surface area of ​​the foam surface fully absorbs the fine dust particles. Finally, the foam is discharged along with the gas discharge mechanism 2, and gas-liquid separation is performed to obtain clean gas.

[0032] In one embodiment of the present invention, Figure 2 and Figure 3As shown, the gas exhaust mechanism 2 includes an exhaust pipe 21, an air intake base 24 and a floating base 241, wherein the exhaust pipe 21 is arranged at the top air outlet end of the dust removal box 1, a movable rod 23 is slidably penetrated at the bottom of the exhaust pipe 21, a piston 22 is arranged on the top of the movable rod 23, the movable rod 23 and the exhaust pipe 21 are connected to each other, the air intake base 24 is arranged at the bottom of the exhaust pipe 21, the floating base 241 is arranged at the bottom of the air intake base 24, a steam-water separator 25 is arranged at the air outlet end of the exhaust pipe 21, and an exhaust pump 26 is arranged between the exhaust pipe 21 and the steam-water separator 25.

[0033] Specifically, as the foam continues to accumulate inside the dust removal box 1, by starting the exhaust pump 26, the foam in the dust removal box 1 is sucked through the air inlet hole pre-opened on the air inlet base 24, and moves upward along the movable rod 23 to the exhaust pipe 21, and then enters the gas-water separator 25, separating the gas and liquid in the foam to obtain pure gas.

[0034] In the above embodiment, since part of the foam will break and become liquid again, and gradually accumulate at the bottom of the dust removal box 1, as the liquid level rises, in order to prevent the liquid level from submerging the air intake base 24, a floating base 241 is added to the bottom of the air intake base 24, so that the air intake base 24 is always above the liquid level and the foam is stably absorbed. In addition, when the air intake base 24 rises with the liquid level, the piston 22 at the upper end of the movable rod 23 ensures that the movable rod 23 is always in airtight connection with the exhaust pipe 21.

[0035] It should be noted that, when there is too much foam liquid at the bottom of the dust removal box 1 , a drainage pipeline is opened at the bottom of the dust removal box 1 to discharge the foam liquid to the outside.

[0036] In one embodiment of the present invention, Figure 2 , 4 As shown in Figures 5 and 6, the foam generating box 321 is a spherical shell structure, and the nozzle 323 is arranged at the geometric center of the foam generating box 321. The nozzle 323 is a spherical structure, and the outer surface of the nozzle 323 is provided with a spherical radiating nozzle. The foam outlet 322 is provided with a concave drainage groove 3221 at one end of the inner wall of the foam generating box 321, which is used to guide the foaming agent to the inside of the foam outlet 322, and the inner wall of the foam outlet 322 is provided with a strip protrusion 3222 for the foaming agent to generate foam. The top of the foam generating box 321 is provided with a nozzle 311 for spraying the foaming agent, and the spraying direction of the nozzle 311 is 360° horizontally. A pulse air pump 331 is provided on the air supply pipe 33.

[0037] Specifically, in the process of dust gas entering the foam dust removal mechanism 3 through the air supply pipe 33, the pulse air pump 331 on the air supply pipe 33 causes the nozzle 323 to spray pulse gas, which facilitates the foam outlet 322 to discharge tiny bubbles (on the contrary, if the nozzle 323 continues to spray gas, the air flow velocity remains unchanged, and there is no pulse gas at the foam outlet 322, it is easy to produce larger bubbles, and the larger bubbles are easier to break and have a smaller area. The bubbles are of different sizes, which affects the efficiency of dust absorption).

[0038] In the above embodiment, the spraying direction of the nozzle 311 on the top of the foam generating box 321 is 360° horizontally, so that the foaming agent gradually flows downward along the cross-section of the top wall of the foam generating box 321, and the nozzle 323 is located at the geometric center of the foam generating box 321, and a spherical radiating nozzle is arranged on the surface. Therefore, the force of the gas discharged from the nozzle 323 in any direction acts vertically on the inner wall of the foam generating box 321, so that the foaming agent flows more evenly along the inner wall of the foam generating box 321, and the gas is discharged more evenly from the foam outlet 322, thereby forming a larger and more sufficient amount of foam.

[0039] In one embodiment of the present invention, Figure 2 and Figure 6 As shown, a flow stopper rod 42 is provided at the air inlet end of the air supply pipe 33. The absorbent supply assembly 43 includes a floating block 431 and a liquid outlet nozzle 436, wherein the floating block 431 is movably arranged inside the primary filter box 41, and the liquid outlet nozzle 436 is arranged on the upper surface of the floating block 431, and the opening of the liquid outlet nozzle 436 corresponds to the flow stopper rod 42 up and down, and the edge of the floating block 431 is provided with a flow equalizing net plate 432, and the floating block 431 is penetrated by a guide rod 435 up and down.

[0040] Specifically, in the process of feeding the absorbent into the primary filter box 41 through the absorbent supply component 43, in order to prevent too little absorbent from affecting the absorption of dust, the specific process is: when there is too much absorbent and is about to submerge the air supply pipe 33 on the stop rod 42, the liquid outlet nozzle 436 continues to move upward due to the buoyancy of the floating block 431, and the stop rod 42 is inserted into the opening of the liquid outlet nozzle 436. The liquid outlet nozzle 436 is closed to stop feeding the absorbent. When the absorbent is gradually consumed, the liquid level drops, the floating block 431 drops, the liquid outlet nozzle 436 drops and leaves the stop rod 42, and the liquid outlet nozzle 436 continues to supply absorbent to the interior of the primary filter box 41 to maintain the volume of the absorption liquid inside the primary filter box 41, thereby maintaining the dust absorption efficiency of the primary filter box 41 unchanged.

[0041] In the above embodiment, the guide rod 435 moves up and down along the sliding sleeve 433 on the floating block 431, and the flow balancing mesh plate 432 makes the air flow flow upward evenly. In order to prevent the edge of the flow balancing mesh plate 432 from rubbing against the inner wall of the primary filter box 41, a protective plate 434 is provided at the edge of the flow balancing mesh plate 432.

[0042] In order to clearly explain the above embodiments, refer to Figure 1-6 The specific working principle of the chemical waste gas dust treatment device of the present invention is as follows: during the preparation period before the use of the device, the absorbent is connected to the liquid outlet nozzle 436 through a pipeline, and the absorbent is sent into the primary filter box 41. When the absorbent reaches a predetermined height, the liquid outlet nozzle 436 is closed to stop supplying the absorbent. When the absorbent is gradually consumed, the liquid outlet nozzle 436 is opened to continue supplying the absorbent into the primary filter box 41 to maintain the volume of the absorption liquid inside the primary filter box 41.

[0043] When removing dust from chemical exhaust gas, the dust gas is first sent into the jet disk 441 through the air inlet pipe 443, and the dust gas is sprayed vertically upward through the jet nozzle 442 on the jet disk 441. The dust gas floats upward through the absorbent, and most of the dust particles are adsorbed by the absorbent. A small number of dust particles that are not decomposed in time escape, and then the gas enters the air supply pipe 33.

[0044] The gas is then sent into the foam dust removal mechanism 3, at which time the gas is sent to the nozzle 323 through the air supply pipe 33, and the nozzle 323 discharges the gas to the inside of the foam generating box 321. At the same time, the foam agent supply component 31 sends the foam agent to the inner wall of the foam generating box 321 through the nozzle 311. As the gas inside the foam generating box 321 expands, the gas pushes the foam agent to leave the foam outlet 322 together. When the foam agent leaves the foam outlet 322, it generates bubbles under the action of surface tension and wraps the dust gas in the foam, which is discharged from the foam outlet 322 together. Then the foam gradually falls into the dust removal box 1. The large surface area of ​​the foam surface fully absorbs the fine dust particles. Finally, the foam is discharged along with the gas discharge mechanism 2 and enters the gas-water separator 25 for gas-liquid separation, thereby obtaining clean gas.

[0045] In summary, the chemical waste gas dust treatment device of the embodiment of the present invention passes the dust particles into the absorbent through the gas primary filtration mechanism for preliminary absorption. The unabsorbed escaped particles enter the foam dust removal mechanism, and the foam particles with a very large surface area wrap the dust therein. The dust particles are in full contact with the foam, and the dust is fully and thoroughly absorbed, thereby completely removing the organic dust particles.

[0046] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and deform the above embodiments within the scope of the present invention.

Claims

1. A chemical waste gas dust treatment device, characterized in that: It comprises a dust removal box (1), and a gas primary filtration mechanism (4), a foam dust removal mechanism (3) and a gas exhaust mechanism (2) arranged in the dust removal box (1), wherein: The gas primary filter mechanism (4) comprises a primary filter box (41), an absorbent supply assembly (43) and an air supply assembly (44), wherein the primary filter box (41) is arranged on one side of the dust removal box body (1) and is used for preliminary solution adsorption of waste gas dust, the air supply assembly (44) is arranged at the air inlet end of the primary filter box (41), the air supply assembly (44) comprises an air jet disc (441) arranged at the bottom of the primary filter box (41), the absorbent supply assembly (43) is arranged inside the primary filter box (41), the absorbent supply assembly (43) is used to replenish the absorbent for adsorbing dust, and the air outlet end of the primary filter box (41) is connected to the air inlet end of the gas discharge mechanism (2); The foam dust removal mechanism (3) is used to perform foam adsorption on the gas discharged from the gas primary filtering mechanism (4), and the foam dust removal mechanism (3) comprises a foam absorption component (32) arranged inside the dust removal box (1), and the foam absorption component (32) is connected to the gas outlet end of the gas primary filtering mechanism (4) by arranging an air supply pipe (33); The foam absorption component (32) comprises a foam generating box (321) arranged inside the dust removal box (1); a foam outlet (322) is provided on the surface of the foam generating box (321); a nozzle (323) is provided inside the foam generating box (321); the nozzle (323) is connected to the air outlet end of the air supply pipe (33); and the air inlet end of the air supply pipe (33) is connected to the air outlet end of the primary filter box (41); The foam generating box (321) is a spherical shell structure, the jet head (323) is arranged at the geometric center position of the foam generating box (321), the jet head (323) is a spherical structure, and a spherical radiating jet port is arranged on the outer surface of the jet head (323); An end of the foam outlet (322) facing the inner wall of the foam generating box (321) is provided with an inwardly concave drainage groove (3221), and the inner wall of the foam outlet (322) is provided with a strip-shaped protrusion (3222); A nozzle (311) for spraying foaming agent is arranged on the top of the foam generating box (321), and the spraying direction of the nozzle (311) is 360° horizontally; The gas exhaust mechanism (2) comprises an exhaust pipe (21), an air intake base (24) and a floating base (241), wherein the exhaust pipe (21) is arranged at the top air outlet end of the dust removal box (1), a movable rod (23) is slidably penetrated through the bottom of the exhaust pipe (21), a piston (22) is arranged at the top of the movable rod (23), the movable rod (23) and the exhaust pipe (21) are communicated with each other, the air intake base (24) is arranged at the bottom of the exhaust pipe (21), and the floating base (241) is arranged at the bottom of the air intake base (24).

2. The chemical waste gas dust treatment device according to claim 1, characterized in that: A steam-water separator (25) is provided at the gas outlet end of the exhaust pipe (21), and an exhaust pump (26) is provided between the exhaust pipe (21) and the steam-water separator (25).

3. The chemical waste gas dust treatment device according to claim 1, characterized in that: The air supply pipe (33) is provided with a pulse air pump (331).

4. The chemical waste gas dust treatment device according to claim 1, characterized in that: A flow-stop rod (42) is provided at the air inlet end of the air supply pipe (33).

5. The chemical waste gas dust treatment device according to claim 4, characterized in that: The absorbent supply assembly (43) comprises a floating block (431) and a liquid outlet nozzle (436), wherein the floating block (431) is movably arranged inside the primary filter box (41) up and down, and the liquid outlet nozzle (436) is arranged on the upper surface of the floating block (431), and the opening of the liquid outlet nozzle (436) corresponds to the stop rod (42) up and down.

6. The chemical waste gas dust treatment device according to claim 5, characterized in that: A flow-equalizing net plate (432) is provided at the edge of the floating block (431), and a guide rod (435) is provided through the upper and lower parts of the floating block (431).

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