Coal tar tail gas alkali washing system

Abstract

The utility model belongs to the technical field of chemical equipment, and discloses a coal tar tail gas alkali washing system which comprises a primary filter tank, a secondary filter tank and a pump body, a cover plate covers the first-stage filter tank and the second-stage filter tank, the pump body is arranged on the cover plate, and a feed port of the pump body is formed in the second-stage filter tank; the first-stage filter tanks are symmetrically arranged on two sides of the second-stage filter tank, the first-stage filter tanks are connected with a discharge port of the circulating liquid alkali pipe, and a feed port of the second-stage filter tank is communicated with the discharge port of the first-stage filter tank. Through the arrangement of the first-stage filter tank and the second-stage filter tank, a circulating liquid caustic soda mixture is separated, impurities of the circulating liquid caustic soda mixture are precipitated in the first-stage filter tank, clean circulating liquid caustic soda enters the second-stage filter tank, operation of a pump body is smoother, and the problems that the circulating liquid caustic soda accumulates along with the impurities, the pump body is damaged, and the stability of a system is affected are solved; meanwhile, through secondary filtering, accumulation of impurities is reduced, and the problem that the work efficiency is reduced due to shutdown maintenance of the system caused by accumulation of the impurities is solved.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, specifically relating to a coal tar tail gas alkaline washing system. Background Technology

[0002] In the coal tar processing technology, exhaust gas is collected from various process equipment by a blower and then introduced into an alkaline scrubbing tower. The alkaline solution in the tower washes the exhaust gas to solve the problem of exhaust gas pollution. The alkaline solution in the tower is usually recycled. However, solid impurities are generated during the recycling process. As solid impurities accumulate, the solid content in the alkaline solution gradually increases, which can damage the pump and affect the stability of the system. Furthermore, as impurities accumulate, maintenance shutdowns are necessary, leading to reduced work efficiency. Summary of the Invention

[0003] Based on this, this application provides a coal tar tail gas alkaline washing system to solve the problem that solid impurities are generated in the alkaline solution during circulation. As solid impurities accumulate, the solid content in the alkaline solution gradually increases, which causes damage to the pump body and affects the stability of the system. Furthermore, as impurities accumulate, maintenance must be stopped, resulting in reduced work efficiency.

[0004] The technical solution to the above-mentioned technical problems in this application is as follows:

[0005] A coal tar tail gas alkaline washing system includes: a primary filter tank, a secondary filter tank, and a pump body; both the primary and secondary filter tanks are covered with cover plates, the pump body is mounted on the cover plates, and the inlet of the pump body is located inside the secondary filter tank; the primary filter tanks are symmetrically arranged on both sides of the secondary filter tank, the outlet of the primary filter tank is connected to the circulating liquid alkali pipe, and is used for the first filtration of the circulating liquid alkali; the inlet of the secondary filter tank is connected to the outlet of the primary filter tank.

[0006] Preferably, the discharge port of the primary filter tank is provided with a first filter screen, and the filter screen is provided with connecting plates around its perimeter. The connecting plates are detachably connected to the discharge port of the primary filter tank.

[0007] Preferably, one end of the primary filter tank is provided with an L-shaped grid groove, and at least one first slider is provided at both ends of the L-shaped grid groove. At least one first sliding groove is provided at opposite ends of the primary filter tank, and the first sliding groove is slidably connected to the first slider.

[0008] Preferably, a first guide wheel is provided on the side of the primary filter tank away from the discharge port of the primary filter tank, and a first driving member is provided on the cover plate. The first driving member is connected to a first annular rope of the first guide wheel and is used to drive the first guide wheel to rotate. A second annular rope is provided on the first guide wheel and is fixedly connected to the L-shaped grid groove and is used to drive the L-shaped grid groove to slide back and forth along the extension direction of the first slide groove.

[0009] Preferably, a second filter screen is provided in the secondary filter tank, which divides the secondary filter tank into a first tank and a second tank. The inlet of the first tank is connected to the outlet of the primary filter tank, and the second tank is connected to the inlet of the pump body.

[0010] Preferably, the mesh count of the second filter screen is greater than that of the first filter screen.

[0011] Preferably, the second filter screen is provided with second sliders on both sides, and the first filter groove is provided with second sliding grooves on opposite sides, and the second sliders are slidably connected to the second sliding grooves.

[0012] Preferably, a second guide wheel is provided on the side of the first groove away from the second filter screen, a second driving member is provided on the cover plate, the second driving member is connected to a third annular rope of the second guide wheel, and is used to drive the second guide wheel to rotate. A fourth annular rope is provided on the second guide wheel, and the fourth annular rope is fixedly connected to the second filter screen, and is used to drive the second filter screen to slide back and forth along the extension direction of the second groove.

[0013] Preferably, a stabilizing plate is provided on the lower end face of the second filter screen, and the stabilizing plate is provided with a plurality of water-permeable holes, wherein the mesh number of the water-permeable holes is not less than the mesh number of the second filter screen.

[0014] The technical solution adopted in this application can achieve the following beneficial effects:

[0015] By setting up primary and secondary filtration tanks, the circulating liquid alkali mixture is separated, allowing impurities to settle in the primary filtration tank and the cleaner circulating liquid alkali to enter the secondary filtration tank. This makes the pump operation smoother and solves the problem that the accumulation of impurities in the circulating liquid alkali can damage the pump and affect system stability. At the same time, secondary filtration reduces the accumulation of impurities, preventing system downtime for maintenance and reduced work efficiency caused by impurity buildup. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall coal tar tail gas alkaline washing system of this application.

[0017] Figure 2This is a partial schematic diagram of the coal tar tail gas alkaline washing system of this application. Figure 1 .

[0018] Figure 3 For the coal tar tail gas alkaline washing system of this application Figure 2 Top view.

[0019] Figure 4 This is a cross-sectional view of the coal tar tail gas alkaline washing system of this application.

[0020] Figure 5 This is a partial schematic diagram of the coal tar tail gas alkaline washing system of this application. Figure 2 .

[0021] Figure 6 This is a schematic diagram of the L-shaped grid trough of the coal tar tail gas alkaline washing system of this application.

[0022] Figure 7 This is a schematic diagram of the second filter screen in the coal tar tail gas alkaline washing system of this application.

[0023] In the diagram: circulating alkali pipe 100, primary filter tank 200, first filter screen 210, connecting plate 220, first drive component 230, L-shaped grid groove 240, first slider 241, first slide groove 242, first guide wheel 250, first annular rope 251, second annular rope 252, secondary filter tank 300, second filter screen 310, first tank body 311, second tank body 312, stabilizing plate 313, second slider 314, second slide groove 315, second drive component 320, second guide wheel 330, third annular rope 331, fourth annular rope 332, pump body 400, cover plate 410. Detailed Implementation

[0024] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0025] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," "top," "bottom," "end," "top," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Please see Figures 1 to 7 This application provides a coal tar tail gas alkaline washing system, including: a primary filter tank 200, a secondary filter tank 300, and a pump body 400; both the primary filter tank 200 and the secondary filter tank 300 are covered with cover plates 410, the pump body 400 is disposed on the cover plates 410, and the inlet of the pump body 400 is disposed inside the secondary filter tank 300; the primary filter tank 200 is symmetrically disposed on both sides of the secondary filter tank 300, the primary filter tank 200 is connected to the outlet of the circulating liquid alkali pipe 100 for the first filtration of circulating liquid alkali, and the inlet of the secondary filter tank 300 is connected to the outlet of the primary filter tank 200. The cover plate 410 includes five parts: a primary cover plate 410 on the top of the primary filter tank 200, two secondary cover plates 410 on the top of the secondary filter tank 300, and an auxiliary cover plate 410 not located around the perimeter. The primary cover plate 410 and the secondary cover plate 410 can be opened, and the auxiliary cover plate 410 is used to install auxiliary equipment.

[0028] Specifically, both the primary filter tank 200 and the secondary filter tank 300 are protected with corrosion-resistant and acid-alkali-resistant coatings, and all parts and equipment in this application are made of acid-alkali-resistant materials or treated with acid-alkali-resistant and corrosion-resistant materials; both the primary filter tank 200 and the secondary filter tank 300 are covered with cover plates 410 to form a sealed space, and the pump body 400 is mounted on the cover plate 410 and located on one side above the secondary filter tank 300. At the same time, the pump body 400 is close to the circulating alkali pipe 1. On one side of 00, the inlet of the pump body 400 extends through the cover plate 410 into the secondary filter tank 300, and the inlet of the pump body 400 is equipped with an intercepting filter screen; the primary filter tank 200 is symmetrically arranged on both sides of the secondary filter tank 300, and the outlet of the primary filter tank 200 coincides with the inlet of the secondary filter tank 300, and it is located at three-quarters of the side wall of the primary filter tank 200. The outlet of the circulating liquid alkali pipe 100 extends through the cover plate 410 into the bottom of the primary filter tank 200.

[0029] Furthermore, the circulating liquid alkali mixture enters the primary filter tank 200 from the outlet of the circulating liquid alkali pipe 100. With continuous injection, the liquid level of the circulating liquid alkali mixture gradually surpasses the outlet of the primary filter tank 200. Impurities in the circulating liquid alkali mixture settle to the bottom and fall into the primary filter tank 200. The circulating liquid alkali enters the secondary filter tank 300, and is filtered again at the inlet of the pump body 400. The secondary filtered circulating liquid alkali is extracted and transported to the tail gas alkali washing tower for further tail gas alkali washing.

[0030] The technical solution of the coal tar tail gas alkaline washing system adopted in this application can achieve the following beneficial effects:

[0031] By using a primary filter tank 200 and a secondary filter tank 300, the circulating liquid alkali mixture is separated, allowing impurities to settle in the primary filter tank 200, while the cleaner circulating liquid alkali enters the secondary filter tank 300. This makes the operation of the pump 400 smoother and solves the problem that the accumulation of impurities in the circulating liquid alkali can damage the pump 400 and affect system stability. At the same time, secondary filtration reduces the accumulation of impurities, solving the problem that the accumulation of impurities leads to system downtime for maintenance, thereby reducing work efficiency.

[0032] Based on the above scheme, in order to achieve cleaner filtration, the discharge port of the primary filter tank 200 is provided with a first filter screen 210, and connecting plates 220 are provided around the filter screen. The connecting plates 220 are detachably connected to the discharge port of the primary filter tank 200.

[0033] An embedded slot is provided in the outlet of the primary filter tank 200 (inlet of the secondary filter tank 300). Connecting plates 220 are provided around the first filter screen 210, and the connecting plates 220 are connected end to end to form a quadrilateral, which is the same size as the embedded slot in the outlet of the primary filter tank 200 (inlet of the secondary filter tank 300). By inserting the first filter screen 210 into the embedded slot from above, as the circulating liquid alkali mixture gradually accumulates, impurities remain in the primary filter tank 200, and the circulating liquid alkali passes through the first filter screen 210 into the secondary filter tank 300. By setting the first filter screen 210, the circulating liquid alkali filtered in the first filter is filtered again, thereby filtering out the impurities floating on the circulating liquid alkali, solving the problem of insufficient filtration effect in the first filtration, and making the filtered circulating liquid alkali cleaner.

[0034] In the above scheme, in order to facilitate cleaning, one end of the primary filter tank 200 is provided with an L-shaped grid groove 240, and at least one first slider 241 is provided at both ends of the L-shaped grid groove 240. At least one first sliding groove 242 is provided at opposite ends of the primary filter tank 200, and the first sliding groove 242 is slidably connected to the first slider 241.

[0035] Specifically, the L-shaped grid grooves 240 are all in the shape of a mesh plate, and three first sliders 241 are respectively arranged on both sides of the L-shaped grid grooves 240. The L-shaped grid grooves 240 are parallel to the first filter screen 210. Two first sliding grooves 242 are arranged on the two sides adjacent to the discharge port of the primary filter tank 200. Among the three first sliders 241, the two first sliders 241 away from the cover plate 410 are located in the first sliding grooves 242 away from the cover plate 410, and the one first slider 241 close to the cover plate 410 is located in the other first sliding groove 242. The bottom of the L-shaped grid grooves 240 extends into the lower part of the discharge port of the primary filter tank 200. By opening the cover plate 410, the L-shaped grid groove 240 slides within the first sliding groove 242, scraping the floating impurities on the top of the circulating liquid alkali mixture dispersed in the primary filter tank 200 to the side away from the primary filter tank 200, making manual cleaning more convenient. At the same time, when the L-shaped grid groove 240 is not sliding, it is in close contact with the discharge port side of the primary filter tank 200. The circulating liquid alkali mixture first undergoes primary filtration through the L-shaped grid groove 240, then secondary filtration through the first filter screen 210, and finally flows into the secondary filter tank 300, resulting in cleaner filtration and thus extending the service life and maintenance cycle of the pump body 400.

[0036] Based on the above scheme, for ease of operation, a first guide wheel 250 is provided on the side of the primary filter tank 200 away from the discharge port of the primary filter tank 200, and a first driving member 230 is provided on the cover plate 410. The first driving member 230 is connected to the first annular rope 251 of the first guide wheel 250 to drive the first guide wheel 250 to rotate. A second annular rope 252 is provided on the first guide wheel 250, and the second annular rope 252 is fixedly connected to the L-shaped grid groove 240 to drive the L-shaped grid groove 240 to slide back and forth along the extension direction of the first sliding groove 242.

[0037] Three first guide wheels 250 are provided on the side of the primary filter tank 200 away from the discharge port of the primary filter tank 200, and are respectively distributed at both ends and the middle of the side. The first drive component 230 is provided on the cover plate 410 (auxiliary cover plate 410). The first drive component 230 is, but is not limited to, a motor, a rotating wheel, etc. The first drive component 230 is connected to the first guide wheel 250 through the first annular rope 251. The first annular rope 251 is similar to a belt but is made of acid and alkali resistant and corrosion resistant material. Similarly, the first guide wheel 250 and the first slider 241 are also made of acid and alkali resistant and corrosion resistant material. The first guide wheel 250 is a coaxial double-wheel pulley, one of which is connected to the first drive component 230, and the other is connected to the L-shaped grid groove 240 through the second annular rope 252. The second annular rope 252 is annular, and the connection between the second annular rope 252 and the L-shaped grid groove 240 is fixed to the L-shaped grid groove 240 by a snap-fit. When the first guide wheel 250 rotates clockwise, it pulls the second annular rope 252 to rotate, thereby driving the L-shaped grid groove 240 to move away from the discharge port of the primary filter tank 200. Conversely, when the first guide wheel 250 rotates counterclockwise, it pulls the second annular rope 252 to rotate in the opposite direction, driving the L-shaped grid groove 240 to move closer to the discharge port of the primary filter tank 200.

[0038] Stop the flow of the pump body 400 and the circulating liquid alkali mixture, open the cover plate 410 (secondary cover plate 410), and activate the first drive component 230 to drive the first guide wheel 250 to rotate clockwise using the first annular rope 251. Simultaneously, the first guide wheel 250 causes the second annular rope 252 to move the L-shaped grid groove 240 away from the discharge port of the primary filter tank 200, causing floating impurities dispersed in the primary filter tank 200 to slide to one side. When one end of the L-shaped grid groove 240 contacts the primary filter tank 200, stop the first drive component 230, and manually remove and process the floating impurities. After processing, activate the first drive component 230 to rotate in the opposite direction, causing the first guide wheel 250 to rotate in the opposite direction, moving the L-shaped grid groove 240 closer to the discharge port of the primary filter tank 200. After resetting, stop the first drive component 230 and close the cover plate 410. This method is more convenient and solves the problems of difficult cleaning and maintenance and low work efficiency.

[0039] In one embodiment of this application, a second filter screen 310 is provided in the secondary filter tank 300. The second filter screen 310 divides the secondary filter tank 300 into a first tank body 311 and a second tank body 312. The inlet of the first tank body 311 is connected to the outlet of the primary filter tank 200, and the second tank body 312 is connected to the inlet of the pump body 400.

[0040] The second filter screen 310 is located in the middle of the secondary filter tank 300 and is perpendicular to the first filter screen 210. The first tank body 311 is located on the side with the inlet of the secondary filter tank 300 (outlet of the primary filter tank 200), and the second tank body 312 is located on the side away from the inlet of the secondary filter tank 300 (outlet of the primary filter tank 200) and is connected to the inlet of the pump body 400. The circulating liquid alkali enters the first tank body 311 from the outlet of the primary filter tank 200, then enters the second tank body 312 through the second filter screen 310, and is then pumped out by the pump body 400. By setting the second filter screen 310, the circulating liquid alkali is further purified, making it cleaner.

[0041] Furthermore, the mesh count of the second filter screen 310 is greater than that of the first filter screen 210. In simpler terms, the pore size of the second filter screen 310 is larger than that of the first filter screen 210. Initial filtration through the larger pore size of the first filter screen 210 prevents floating debris from accumulating and clogging it, thus preventing the circulating alkali solution from flowing into the secondary filtration tank 300. Then, the smaller mesh count of the second filter screen 310 provides further, finer filtration, resulting in a cleaner solution.

[0042] In a preferred embodiment of this application, for ease of cleaning and maintenance, a second slider 314 is provided on both sides of the second filter screen 310, and a second slide groove 315 is provided on the opposite sides of the first filter groove, with the second slider 314 slidably connected to the second slide groove 315.

[0043] A second guide wheel 330 is provided on the side of the first groove 311 away from the second filter screen 310. A second driving member 320 is provided on the cover plate 410. The second driving member 320 is connected to the second guide wheel 330 by a third annular rope 331 for driving the second guide wheel 330 to rotate. A fourth annular rope 332 is provided on the second guide wheel 330. The fourth annular rope 332 is fixedly connected to the second filter screen 310 for driving the second filter screen 310 to slide back and forth along the extension direction of the second slide groove 315.

[0044] Three second guide wheels 330 are provided on the side of the secondary filter tank 300 away from the feed inlet of the pump body 400, and are respectively distributed at both ends and the middle of this side. The second drive component 320 is provided on the cover plate 410 (auxiliary cover plate 410). The second drive component 320 is, but is not limited to, a motor, a rotating wheel, etc. The second drive component 320 is connected to the second guide wheels 330 through a third annular rope 331. The third annular rope 331 is similar to a belt but is made of acid and alkali resistant and corrosion resistant material. Similarly, the second guide wheels 330 and the second slider 314 are also made of acid and alkali resistant and corrosion resistant material. The second guide wheel 330 is a coaxial double-wheel pulley, one of which is connected to the second drive component 320, and the other two are connected to the second filter screen 310 through the fourth annular rope 332. The fourth annular rope 332 is annular, and the connection between the fourth annular rope 332 and the second filter screen 310 is fixed to the second filter screen 310 by a clamp. When the second guide wheel 330 rotates clockwise, it pulls the third annular rope 331 to rotate, thereby driving the second filter screen 310 to move away from the feed inlet of the pump body 400. Conversely, when the second guide wheel 330 rotates counterclockwise, it pulls the third annular rope 331 to rotate in the opposite direction, driving the second filter screen 310 to move closer to the feed inlet of the pump body 400.

[0045] Based on the above scheme, a stabilizing plate 313 is provided on the lower end face of the second filter screen 310. The stabilizing plate 313 is provided with a plurality of water-permeable holes, and the mesh number of the water-permeable holes is not less than the mesh number of the second filter screen 310.

[0046] Both the stabilizing plate 313 and the second filter screen 310 are made of acid and alkali resistant and corrosion resistant materials. The stabilizing plate 313 is vertically set at the bottom of the second filter screen 310. By setting the stabilizing plate 313, the problem of the second filter screen 310 deflecting when moving is solved.

[0047] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A coal tar tail gas alkaline scrubbing system, characterized in that, include: The system comprises a primary filter tank, a secondary filter tank, and a pump body. Both the primary and secondary filter tanks are covered with cover plates. The pump body is mounted on the cover plates, and its inlet is located inside the secondary filter tank. The primary filter tanks are symmetrically arranged on both sides of the secondary filter tank. The primary filter tank is connected to the outlet of the circulating alkali pipe for the first filtration of the circulating alkali. The inlet of the secondary filter tank is connected to the outlet of the primary filter tank.

2. The coal tar tail gas alkaline washing system as described in claim 1, characterized in that, The discharge port of the primary filter tank is equipped with a first filter screen, and connecting plates are provided around the filter screen. The connecting plates are detachably connected to the discharge port of the primary filter tank.

3. The coal tar tail gas alkaline washing system as described in claim 2, characterized in that, One end of the primary filter tank is provided with an L-shaped grid groove, and at least one first slider is provided at both ends of the L-shaped grid groove. At least one first sliding groove is provided at opposite ends of the primary filter tank, and the first sliding groove is slidably connected to the first slider.

4. The coal tar tail gas alkaline washing system as described in claim 3, characterized in that, A first guide wheel is provided on the side of the primary filter tank away from the discharge port of the primary filter tank. A first driving member is provided on the cover plate. The first driving member is connected to a first annular rope of the first guide wheel and is used to drive the first guide wheel to rotate. A second annular rope is provided on the first guide wheel and is fixedly connected to the L-shaped grid groove and is used to drive the L-shaped grid groove to slide back and forth along the extension direction of the first slide groove.

5. The coal tar tail gas alkaline washing system as described in claim 2, characterized in that, The secondary filter tank is equipped with a second filter screen, which divides the secondary filter tank into a first tank and a second tank. The inlet of the first tank is connected to the outlet of the primary filter tank, and the second tank is connected to the inlet of the pump body.

6. The coal tar tail gas alkaline washing system as described in claim 5, characterized in that, The mesh count of the second filter is greater than that of the first filter.

7. The coal tar tail gas alkaline washing system as described in claim 5, characterized in that, The second filter screen is provided with second sliders on both sides, and the first-stage filter tank is provided with second sliding grooves on opposite sides, and the second sliders are slidably connected to the second sliding grooves.

8. The coal tar tail gas alkaline washing system as described in claim 7, characterized in that, A second guide wheel is provided on the side of the first groove away from the second filter screen. A second driving member is provided on the cover plate. The second driving member is connected to a third annular rope of the second guide wheel and is used to drive the second guide wheel to rotate. A fourth annular rope is provided on the second guide wheel and is fixedly connected to the second filter screen and is used to drive the second filter screen to slide back and forth along the extension direction of the second groove.

9. The coal tar tail gas alkaline washing system as described in claim 5, characterized in that, The lower end face of the second filter screen is provided with a stabilizing plate, and the stabilizing plate is provided with a plurality of water-permeable holes, and the mesh number of the water-permeable holes is not less than the mesh number of the second filter screen.

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