A device for treating nitrochlorobenzene tail gas

Abstract

The present application relates to a nitrochlorobenzene tail gas treatment device, which comprises a treatment box, a feed pipe for feeding the nitrochlorobenzene tail gas into the treatment box, and a neutralization pipe for feeding a sodium hydroxide solution into the treatment box. The present application has the effect of reducing the pollution caused by the nitrochlorobenzene tail gas emission.

Description

Technical Field

[0001] The present application relates to the field of tail gas treatment, and in particular to a device for treating nitrochlorobenzene tail gas. Background Art

[0002] Nitrochlorobenzene is an organic compound commonly used in dyes, pesticides, medicines and other fields. Nitrochlorobenzene is toxic to a certain extent and can irritate and damage the human body. Even long-term exposure to nitrochlorobenzene tail gas can lead to chronic poisoning, which has adverse effects on the liver, kidneys and nervous system. The direct emission of nitrochlorobenzene tail gas will also pollute the environment and have a negative impact on air quality. In addition, nitrochlorobenzene also has a strong pungent odor. Long-term exposure to the odor will also have a negative impact on human comfort. In summary, the treatment of nitrochlorobenzene tail gas is extremely important, and a nitrochlorobenzene tail gas treatment device is urgently needed to reduce the harm of nitrochlorobenzene tail gas to human health and the environment. Summary of the invention

[0003] In order to reduce the pollution caused by nitrochlorobenzene tail gas emissions, the present application provides a nitrochlorobenzene tail gas treatment device.

[0004] The present application provides a nitrochlorobenzene tail gas treatment device, which adopts the following technical solution:

[0005] A device for treating nitrochlorobenzene tail gas comprises a treatment box, a feeding pipe for feeding nitrochlorobenzene tail gas into the treatment box, and a neutralization pipe for feeding sodium hydroxide solution into the treatment box.

[0006] By adopting the above technical scheme, nitrochlorobenzene is an organic compound in gaseous state, sodium hydroxide is alkaline in liquid state, nitrochlorobenzene is used as raw material, sodium hydroxide is used as acid-binding agent, and the reaction produces sodium nitrophenolate, which is then acidified to form nitrophenol. Other production includes water and sodium hydroxide. Nitrophenol has a higher density than water and is slightly soluble in water. Nitrophenol can be used as an indicator, a bactericide and can also be used in organic synthesis. Through the hydrolysis reaction of nitrochlorobenzene and sodium hydroxide, the content of nitrochlorobenzene in the tail gas is reduced, and the pollution of tail gas emissions is reduced. There is an acidification process in the equipment, and finally sodium nitrophenolate and sodium chloride solution are formed.

[0007] Optionally, an adjustment component for adjusting the sodium hydroxide solution delivery rate is provided in the neutralization tube, the adjustment component includes a rotating ring, a plurality of adjustment plates and a driving member, the neutralization tube includes an annular tube, an annular groove is provided on the annular tube, the rotating ring is rotatably connected to the annular groove, a plurality of adjustment plates are provided on the rotating ring, the adjustment plate is located in the annular groove, the adjustment plate abuts against the inner side wall of the annular tube, and the driving member is used to drive the rotating ring to rotate.

[0008] By adopting the above technical solution, the content of sodium hydroxide solution entering the treatment box is controlled by the adjustment component. When it is necessary to add sodium hydroxide solution, the staff can use the driving member, the driving member drives the rotating ring to rotate, and the rotating ring drives the adjustment plate to move in the annular tube to transport the sodium hydroxide solution between adjacent annular plates to the treatment box. When the staff needs to stop adding sodium hydroxide, the staff turns off the driving member, the rotating ring stops rotating, and the sodium hydroxide solution is blocked by the adjustment plate, so that the sodium hydroxide solution cannot enter the treatment box. The adjustment plate is also convenient for driving the transportation of the sodium hydroxide solution.

[0009] Optionally, the driving member includes a propeller, a worm wheel, a worm and a connecting rod. The propeller is rotatably connected to the feed pipe, the rotation axis of the propeller is parallel to the rotation axis of the feed pipe, one end of the worm is arranged on the propeller, the worm wheel is rotatably connected to the feed pipe, the worm wheel is meshed with the worm, one end of the connecting rod is connected to the worm wheel, and the other end of the connecting rod passes through the feed pipe and is arranged on the rotating ring.

[0010] By adopting the above technical scheme, when the tail gas of nitrochlorobenzene enters the feed pipe, the tail gas drives the propeller to rotate, the rotation of the propeller drives the worm to rotate, the worm drives the worm wheel to rotate, the worm wheel drives the connecting rod to rotate, the connecting rod drives the rotating ring to rotate, the rotating ring drives the adjustment plate to move in the annular tube, and drives the sodium hydroxide solution to be sent into the treatment box. The worm gear has a self-locking effect to prevent the sodium hydroxide solution from entering the treatment box before the nitrochlorobenzene tail gas enters the feed pipe. In addition, the driving component can control the ratio between the volume of the nitrochlorobenzene tail gas and the sodium hydroxide liquid, thereby reducing the mismatch between the ratio of nitrochlorobenzene and sodium hydroxide.

[0011] Optionally, the driving member further includes a plurality of guide blades, and the length direction of the guide blades is perpendicular to the blade surface of the propeller.

[0012] By adopting the above technical solution, the guide vane makes it easier for the exhaust gas to drive the propeller to rotate, thereby improving the sensitivity of the bolt propeller and the reliability of the adjustment component.

[0013] Optionally, a discharge pipe is provided on the lower end surface of the processing box, and a control component for controlling the discharge of the discharge pipe is provided on the discharge pipe, and the control component includes a mounting block, a sliding plate and a driving member, the mounting block is provided on the discharge pipe, and a sliding cavity extending in a direction perpendicular to the length of the discharge pipe is opened inside the mounting block, the sliding cavity is connected to the discharge pipe, the sliding plate is slidably connected in the sliding cavity, a connecting hole is opened on the sliding plate, and the driving member is used to drive the sliding plate to slide along the length direction of the sliding cavity.

[0014] By adopting the above technical scheme, after the reaction of nitrochlorobenzene tail gas and sodium hydroxide liquid in the treatment box is completed, the liquid in the treatment box needs to be collected for subsequent treatment. Since the density of nitrophenol is greater than that of water, nitrophenol is located at the bottom and can be discharged from the discharge pipe. When there is too much liquid in the treatment box, the staff can drive the driving member, and the driving member drives the connecting hole to connect with the discharge pipe, and nitrophenol flows out of the discharge pipe for collection. When the liquid level in the treatment box is lowered, the staff can drive the driving member to move the sliding plate, and the connecting hole of the sliding plate is misaligned with the discharge pipe to block the discharge pipe. The control component has a simple structure and is easy for the staff to operate.

[0015] Optionally, the driving member includes a floating plate and two connecting blocks, the floating plate is slidably connected in the processing box along the vertical direction, the connecting block is arranged on the floating plate, the two connecting blocks are respectively located on both sides of the sliding plate, and the connecting block is provided with a guiding inclined surface for facilitating pushing the sliding plate to slide along the length direction of the sliding cavity, and the two connecting blocks have different heights.

[0016] By adopting the above technical scheme, when the liquid level in the processing box gradually rises, the floating plate drives the two connecting blocks to move, and the guiding slope of the connecting block below the floating plate touches the sliding block, and then the liquid level rises, and the guiding slope of the connecting block below the floating plate causes the sliding block to slide in the sliding groove until the connecting hole is connected with the discharge pipe, and then nitrophenol flows out from the discharge pipe, and the liquid level in the processing box gradually decreases, and the floating plate drives the two connecting blocks to move downward, and then the connecting block below the floating plate moves away from the sliding block, and the connecting block above the floating plate gradually approaches the sliding block, and the liquid level gradually decreases, and the guiding slope of the connecting block below the floating plate causes the sliding block to slide in the sliding groove until the sliding block blocks the discharge pipe, and the driving member is driven by the height of the liquid level in the processing box, so that the driving member can better control the opening and closing of the discharge pipe, and the driving member has a simple structure and is easy to implement.

[0017] Optionally, a discharge port is provided on the processing box, the height of the discharge port is higher than the connection between the discharge pipe and the processing box, and a blocking plate for controlling the closing or opening of the discharge port is provided on the processing box, and the blocking plate is arranged on the floating plate.

[0018] By adopting the above technical solution, if the processing box only discharges nitrophenol located in the lower layer, as time goes by, sodium chloride solution will remain in the processing box. The sodium chloride solution needs to be discharged at the same time as the nitrophenol. Since the density of the sodium chloride solution is lower than that of the nitrophenol, the height of the discharge port is also higher than the height of the discharge pipe. When the liquid level in the processing box gradually rises, the floating plate drives the blocking plate to move upward, and the blocking plate blocks all the discharge ports. The sodium chloride solution flows out from the discharge port, and the staff can collect the sodium chloride solution through the discharge port for later purification treatment.

[0019] Optionally, the processing box is also provided with a switch assembly for controlling the feeding of the feed pipe, and the switch assembly includes an electromagnetic control valve, a control block and two control switches. The electromagnetic control valve is arranged on the feed pipe, the control block is arranged on the driving rod, and the control switch is arranged on the processing box. The two control switches are distributed in the vertical direction, and the control block is located between the two control switches.

[0020] By adopting the above technical scheme, as the nitrochlorobenzene tail gas and sodium hydroxide solution are continuously injected into the treatment box, the liquid level in the treatment box gradually rises, the floating plate gradually rises, and the floating plate drives the control block to gradually rise. The control block contacts the control switch located above the control block, and the control switch closes the electromagnetic control valve. The feed pipe is closed by the battery control valve, and the nitrochlorobenzene tail gas cannot continue to enter the feed pipe. The propeller of the driving part cannot rotate, causing the adjustment plate on the rotating ring to stop, blocking the annular tube, and sodium hydroxide cannot enter the treatment box. At this time, the connecting block will connect the connecting hole of the sliding plate with the discharge pipe, and nitrophenol will flow out of the discharge pipe. At this time, the discharge port is not blocked by the blocking plate, and the sodium chloride solution flows out of the discharge port, causing the liquid level in the treatment box to gradually drop, and the floating plate also drops accordingly. The floating plate drives the control block to drop, and the control block contacts the switch located below the control block. The control switch turns on the electromagnetic control switch, and the feed pipe is turned on again. The nitrochlorobenzene tail gas continues to The nitrochlorobenzene tail gas reacts with the sodium hydroxide to produce nitrophenol and sodium chloride solution. The liquid level in the treatment box gradually rises. In the process of the liquid level in the treatment box dropping, the connecting block above the sliding plate abuts against the sliding plate. The guiding inclined surface of the connecting block above the sliding plate misaligns the connecting hole of the sliding plate with the discharge pipe. Nitrochlorobenzene can no longer flow out of the discharge pipe. In the process of the liquid level in the treatment box dropping, the floating plate is driven down, and the blocking plate blocks the discharge port. The switch assembly is used to keep the liquid level in the treatment box always within a safe range, periodically add nitrochlorobenzene tail gas and sodium hydroxide solution, and periodically discharge nitrophenol and sodium chloride solution, which reduces the staff's reliance on experience to release or open the treatment box and reduces the situation where the staff is contaminated.

[0021] Optionally, a heat recovery component is provided on the processing box, and the heat recovery component includes a plurality of heat conductive plates, a heat conductive cover and a heat conductive pipe. The heat conductive plates are passed through the lower end surface of the processing box, the heat conductive cover is provided on the lower end surface of the processing box and covers the plurality of heat conductive plates, and the heat conductive pipe is provided on the heat conductive cover and is connected to the heat conductive cover.

[0022] By adopting the above technical solution, since there is still a large amount of heat in the exhaust gas, the hydrolysis reaction will absorb part of the heat, while most of the heat will exist inside the treatment box. The heat conducting plate can transfer the heat in the treatment box to the heat conducting cover outside the treatment box, and then the heat in the heat conducting cover is transmitted through the heat conducting pipe for reuse, so that the heat of the exhaust gas can be utilized as much as possible, reducing energy consumption.

[0023] Optionally, the bottom of the processing box is inclined, and the discharge pipe is arranged at the lowest point of the processing box.

[0024] By adopting the above technical solution, nitrophenol and sodium chloride solution are not easy to mix, but the discharge from the discharge pipe at the reaction point of nitrochlorobenzene and sodium hydroxide is impure. The processing box is tilted, so that the nitrochlorobenzene at the bottom has higher purity, thereby improving the purity of nitrochlorobenzene.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The tail gas of nitrochlorobenzene and the sodium hydroxide solution complete the hydrolysis reaction in the treatment box, reducing the tail gas pollution of nitrochlorobenzene;

[0027] 2. The regulating component facilitates the synchronous regulation of nitrochlorobenzene and sodium hydroxide solution into the processing box;

[0028] 3. The control component is convenient for controlling the opening and closing of the discharge pipe and the discharge port, so as to maintain the height of the liquid level in the processing box;

[0029] 4. The heat recovery component facilitates the reuse of exhaust gas heat and reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a device for treating nitrochlorobenzene tail gas.

[0031] Figure 2 yes Figure 1 Cross-sectional view of the feed pipe and the neutralizing pipe to illustrate the structure of the regulating assembly.

[0032] Figure 3 yes Figure 1 A cross-sectional view of the center discharge pipe showing the structure of the control assembly.

[0033] Figure 4 yes Figure 1 A cross-section of the process box showing the heat recovery components.

[0034] Figure numerals: 1, processing box; 11, discharge port; 2, feed pipe; 3, neutralization pipe; 31, first straight pipe; 32, second straight pipe; 33, annular pipe; 331, annular groove; 4, discharge pipe; 5, adjustment component; 51, rotating ring; 52, adjustment plate; 53, driving member; 531, propeller; 532, worm gear; 533, worm; 534, connecting rod; 535, guide plate; 6, control component; 61, mounting block; 611, through hole; 612, sliding cavity; 613, matching groove; 62, sliding plate; 621, connecting hole; 63, sliding bar; 64, Driving member; 641, floating plate; 642, connecting block; 643, blocking plate; 644, first fixed rod; 645, second fixed rod; 646, guiding slope; 651, first vertical rod; 652, first horizontal rod; 653, second vertical rod; 654, second horizontal rod; 655, third vertical rod; 656, fourth vertical rod; 657, third horizontal rod; 658, fourth horizontal rod; 7, switch assembly; 71, solenoid control valve; 72, control block; 73, control switch; 8, heat recovery assembly; 81, heat conduction plate; 82, heat conduction cover; 83, heat conduction pipe. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-4 This application is described in further detail.

[0036] The present application embodiment discloses a device for treating nitrochlorobenzene tail gas. Figure 1 and Figure 2 A device for treating nitrochlorobenzene tail gas comprises a treatment box 1, a feed pipe 2, a neutralization pipe 3, a discharge pipe 4, an adjustment component 5, a control component 6, a switch component 7 and a heat recovery component 8. The lower end surface of the treatment box 1 is inclined, one end of the feed pipe 2 penetrates into the upper end surface of the treatment box 1, the feed pipe 2 is fixedly arranged on the treatment box 1, the neutralization pipe 3 is horizontally arranged, one end of the neutralization pipe 3 is fixedly arranged on the side wall of the treatment box 1, the discharge pipe 4 is fixedly arranged at the lowest point of the lower end surface of the treatment box 1, the discharge pipe 4 is connected with the inside of the treatment box 1, a discharge port 11 is provided on the side wall of the treatment box 1 away from the neutralization pipe 3, and the length direction of the discharge port 11 extends in the horizontal direction, the adjustment component 5 is used to synchronously adjust the rate of nitrochlorobenzene in the feed pipe 2 and the rate of sodium hydroxide solution in the neutralization pipe 3, the control component 6 is used to control the opening and closing of the discharge pipe 4 and the discharge port 11, the switch component 7 is used to close or open the adjustment component 5, and the heat recovery component 8 is used to recover the waste heat in the treatment box 1.

[0037] refer to Figure 1 and Figure 2The adjusting assembly 5 includes a rotating ring 51, four adjusting plates 52 and a driving member 53. The driving member 53 includes a propeller 531, a worm gear 532, a worm 533, a connecting rod 534 and a plurality of guide plates 535. The rotating axis of the propeller 531 is parallel to the length direction of the feeding pipe 2. The propeller 531 is rotatably connected to the feeding pipe 2. The length direction of the worm 533 is parallel to the rotating axis of the propeller 531. The worm 533 is coaxially arranged with the propeller 531. One end of the worm 533 is fixedly arranged on the propeller 531. The worm gear 532 is horizontally arranged. 532 is rotatably connected to the feed pipe 2, the worm gear 532 is meshed with the worm 533, the connecting rod 534 is vertically arranged, the connecting rod 534 is rotatably connected to the feed pipe 2, the upper end of the connecting rod 534 is fixedly arranged on the lower end face of the worm gear 532, the lower end face of the connecting rod 534 passes through the feed pipe 2, the length direction of the guide plate 535 is perpendicular to the blade of the propeller 531, the guide plate 535 is fixedly arranged on the side wall of the feed pipe 2, the guide plate 535 is located on the side of the propeller 531 away from the processing box 1, and a plurality of guide plates 535 are evenly distributed circumferentially along the axis of the feed pipe 2.

[0038] refer to Figure 2 The neutralizing tube 3 includes a first straight tube 31, a second straight tube 32 and an annular tube 33. The first straight tube 31 is horizontally arranged, the second straight tube 32 is horizontally arranged, the length direction of the first straight tube 31 is perpendicular to the horizontal direction of the second straight tube 32, the annular tube 33 is horizontally arranged, the annular tube 33 is located between the first straight tube 31 and the second straight tube 32, the annular tube 33 is coaxially arranged with the connecting rod 534, the annular tube 33 is tangent to and connected with the first straight tube 31, the annular tube 33 is tangent to and connected with the second straight tube 32, and the second straight tube 32 is back One end of the annular tube 33 is fixedly set on the side wall of the processing box 1, the second straight tube 32 is connected to the inside of the processing box 1, the annular ring is provided with an annular groove 331, the rotating ring 51 is horizontally arranged, the rotating ring 51 is rotatably connected in the annular groove 331, the adjusting plate 52 is vertically arranged, the adjusting plate 52 abuts against the inner wall of the annular tube 33, the four adjusting plates 52 are evenly distributed along the circumference of the axis of the annular tube 33, the adjusting plate 52 is fixedly set on the rotating ring 51, and the lower end face of the connecting rod 534 is fixedly set on the rotating ring 51.

[0039] refer to Figure 1 and Figure 3The control assembly 6 includes a mounting block 61, a sliding plate 62, two sliding bars 63 and a driving member 64. The driving member 64 includes a floating plate 641, two connecting blocks 642, a blocking plate 643, a first fixing rod 644 and a second fixing rod 645. The mounting block 61 is fixedly arranged on the discharge pipe 4. A through hole 611 is provided on the mounting block 61. The through hole 611 is connected to the discharge pipe 4. The mounting block 61 is provided with a sliding cavity 612. The length direction of the sliding cavity 612 is horizontally arranged. The sliding cavity 612 is connected to the through hole 611. A matching groove 613 is provided on the mounting block 61 and passes through the sliding cavity 612 in the length direction. The matching groove 613 is connected with the through hole 611. The side wall of the sliding plate 62 is waist-shaped. The sliding plate 62 is horizontally arranged in the length direction. The sliding plate 62 is slidably connected in the sliding cavity 612 in the horizontal direction. A connecting hole 621 is provided on the side wall of the sliding plate 62. The connecting hole 621 is used to connect with the through hole 611. The sliding bar 63 is horizontally arranged in the length direction. The sliding bar 63 is fixedly arranged on the opposite side walls of the sliding plate 62 respectively.

[0040] refer to Figure 1 and Figure 4 , the floating plate 641 is horizontally arranged, and the floating plate 641 is slidably connected to the inner wall of the processing box 1 in the vertical direction. The first fixed rod 644 includes a first vertical rod 651, a first horizontal rod 652, a second vertical rod 653, a second horizontal rod 654 and a third vertical rod 655. The first vertical rod 651 is vertically arranged, and the lower end surface of the first vertical rod 651 is fixedly arranged on the upper end surface of the floating plate 641. The first vertical rod 651 passes through the upper end surface of the processing box 1. The first horizontal rod 652 is horizontally arranged, and one end of the first horizontal rod 652 is fixedly arranged on the upper end surface of the first vertical rod 651. The second vertical rod 653 is vertically arranged, and the upper end surface of the second vertical rod 653 is fixedly arranged on the other end of the first horizontal rod 652. The second horizontal rod 654 is horizontally arranged, and the second horizontal rod 655 54 is fixed on the side wall of the second vertical rod 653, the third vertical rod 655 is vertically arranged, the upper end surface of the third vertical rod 655 is fixed on the end of the second horizontal rod 654 away from the second vertical rod 653, and the two connecting blocks 642 are respectively fixed on the lower end surface of the second vertical rod 653 and the lower end surface of the third vertical rod 655. The height of the connecting block 642 located on the lower end surface of the second vertical rod 653 is lower than that of the connecting block 642 located on the lower end surface of the third vertical rod 655. A guiding inclined surface 646 is provided between the upper end surface of the connecting block 642 located on the lower end surface of the second vertical rod 653 and the side wall facing the sliding bar 63, and a guiding inclined surface 646 is provided between the lower end surface of the connecting block 642 located on the lower end surface of the third vertical rod 655 and the side wall facing the sliding bar 63.

[0041] Refer to Figures 1 and Figure 4, the blocking plate 643 is vertically arranged, and the blocking plate 643 is slidably connected in the vertical direction to the outer wall of the processing box 1 where the discharge port 11 is opened. The second fixed rod 645 includes a fourth vertical rod 656, a third horizontal rod and a fourth horizontal rod 658. The fourth vertical rod 656 is vertically arranged, and the lower end surface of the fourth vertical rod 656 is fixedly arranged on the upper end surface of the floating plate 641. The third horizontal rod 657 is horizontally arranged, and one end of the third horizontal rod 657 is fixedly arranged on the upper end surface of the fourth vertical rod 656. The fourth horizontal rod 658 is horizontally arranged, and the length direction of the fourth horizontal rod 658 is perpendicular to the length direction of the third horizontal rod 657. One end of the fourth horizontal rod 658 is fixedly arranged on one end of the third horizontal rod 657 away from the third vertical rod 655, and the other end of the fourth horizontal rod 658 is fixedly arranged on the side wall of the blocking plate 643 facing the processing box 1.

[0042] refer to Figure 3 and Figure 4 The switch assembly 7 includes an electromagnetic control valve 71, a control block 72 and two control switches 73. The electromagnetic control valve 71 is fixedly arranged on the feed pipe 2. The electromagnetic control valve 71 is located on the side of the guide plate 535 away from the propeller 531. The control block 72 is fixedly arranged on the side wall of the second vertical rod 653 away from the second horizontal rod 654. The control switch 73 is fixedly arranged on the outer wall of the processing box 1. The two control switches 73 are distributed in the vertical direction, and the control block 72 is located between the two control switches 73.

[0043] refer to Figure 1 and Figure 4 The heat recovery component 8 includes a plurality of heat conducting plates 81, a heat conducting cover 82 and a heat conducting pipe 83. The length direction of the heat conducting plate 81 is parallel to the inclination direction of the lower end surface of the processing box 1. The guide plate is vertically arranged. The upper end of the guide plate is located in the processing box 1. The lower end surface of the guide plate passes through the lower end surface of the processing box 1. The plurality of guide plates are evenly distributed along the width direction of the processing box 1. The heat conducting cover 82 is fixedly arranged on the lower end surface of the processing box 1. The plurality of guide plates are located in the space formed by the lower end surface of the processing box 1 and the heat conducting cover 82. One end of the heat conducting pipe 83 is fixedly arranged on the heat conducting cover 82, and the heat conducting pipe 83 is connected with the inside of the heat conducting cover 82.

[0044] The implementation principle of a nitrochlorobenzene tail gas treatment device in an embodiment of the present application is as follows: when the treatment box 1 starts working, the tail of nitrochlorobenzene enters the feed pipe 2, and the tail gas of nitrochlorobenzene advances in a spiral shape under the guidance of the guide plate when circulating in the feed pipe 2. The nitrochlorobenzene tail gas hits the propeller 531 blades and then enters the treatment box 1. The rotation of the propeller 531 blades drives the worm 533 to rotate, and the worm 533 drives the worm gear 532 to rotate. The worm gear 532 drives the connecting rod 534 to rotate, and the connecting rod 534 drives the rotating ring 51 to rotate. The rotating ring 51 drives the adjusting plate 52 to move in the annular tube 33, and the sodium hydroxide liquid in the neutralization tube 3 is sent into the treatment box 1. The sodium hydroxide solution and the nitrochlorobenzene tail gas undergo a hydrolysis reaction, and the final product produces a sodium chloride solution and nitrophenol. The nitrophenol is oily and has a density greater than that of the sodium chloride solution to form a layer.

[0045] As the reaction products of nitrochlorobenzene and sodium hydroxide solution gradually increase in the treatment box 1, the liquid level in the treatment box 1 gradually rises, and the floating plate 641 rises with the rise of the liquid level until the control block 72 abuts against the control switch 73 located above the control block 72. The control switch 73 starts the electromagnetic control valve 71, and the feed pipe 2 is closed, so that the nitrochlorobenzene tail gas cannot enter the treatment box 1, the propeller 531 stops rotating, the regulating plate 52 cannot move, the sodium hydroxide solution cannot enter the treatment box 1, and the liquid level in the treatment box 1 stops rising. The floating plate 641 carries the first A fixed rod 644 and a second fixed rod 645 rise, and the wire slope of the connecting block 642 located on the second vertical rod 653 drives the sliding bar 63 to move, and the sliding bar 63 drives the sliding plate 62 to move in the sliding groove. The connecting hole 621, the through hole 611 and the discharge pipe 4 of the sliding plate 62 are connected, and the nitrophenol located below the processing box 1 flows out from the discharge pipe 4. The blocking plate 643 rises with the second fixed rod 645. The blocking plate 643 cannot block the discharge port 11, and the sodium chloride solution located above the processing box 1 flows out from the discharge port 11. At this time, the liquid level in the processing box 1 gradually decreases.

[0046] As the liquid level in the processing box 1 gradually drops, the floating plate 641 drops with the liquid level, and the first fixed rod 644 drops with the floating plate 641. The guide slope 646 of the connecting block 642 fixed on the third vertical rod 655 abuts against the sliding bar 63. The sliding bar 63 drives the sliding plate 62 to move in the sliding groove. The connecting hole 621 of the sliding plate 62 is misaligned with the through hole 611, and nitrophenol cannot flow out of the discharge pipe 4. The second fixed rod 645 drops with the floating plate 641, and the blocking plate 643 blocks the discharge port 11, so that the sodium chloride solution cannot flow out of the discharge port 11. At this time, the control block 72 on the second vertical rod 653 is lower than the control switch 73 below the control block 72. The control switch 73 closes the battery control valve, and the discharge port 11 is opened. The nitrochlorobenzene tail gas is then introduced into the processing box 1, and the above steps are repeated.

[0047] There is a large amount of heat in the nitrochlorobenzene tail gas. When the nitrochlorobenzene tail gas enters the treatment box 1, the heat is brought into the treatment box 1, causing the temperature in the treatment box 1 to rise. Then the heat is transferred to the heat conductive cover 82 through the heat conductive plate 81, and the heat in the heat conductive cover 82 is transferred to the place where heating is required through the heat conductive pipe 83.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A treatment device for nitrochlorobenzene tail gas, characterized in that: The invention comprises a treatment box (1), a feed pipe (2) for feeding nitrochlorobenzene tail gas into the treatment box (1), and a neutralization pipe (3) for feeding sodium hydroxide solution into the treatment box (1). The neutralization pipe (3) is provided with an adjustment component (5) for adjusting the delivery rate of the sodium hydroxide solution. The adjustment component (5) comprises a rotating ring (51), a plurality of adjustment plates (52), and a driving member (53). The neutralization pipe (3) comprises an annular pipe (33). An annular groove (331) is provided on the annular pipe (33). The rotating ring (51) is rotatably connected to the annular groove (331). The plurality of adjustment plates (52) are provided on the rotating ring (51). The adjustment plates (52) are located in the annular groove (331). The adjustment plates (52) abut against the annular groove (331). The inner wall of the driving member (53) is used to drive the rotating ring (51) to rotate; the driving member (53) comprises a propeller (531), a worm wheel (532), a worm (533) and a connecting rod (534); the propeller (531) is rotatably connected to the inside of the feeding pipe (2); the rotation axis of the propeller (531) is parallel to the rotation axis of the feeding pipe (2); one end of the worm (533) is arranged on the propeller (531); the worm wheel (532) is rotatably connected to the inside of the feeding pipe (2); the worm wheel (532) is meshed with the worm (533); one end of the connecting rod (534) is connected to the worm wheel (532); the other end of the connecting rod (534) passes through the feeding pipe (2) and is arranged on the rotating ring (51).

2. A nitrochlorobenzene tail gas treatment device according to claim 1, characterized in that: The driving member (53) further comprises a plurality of guide blades (535), wherein the length direction of the guide blades (535) is perpendicular to the propeller surface of the propeller (531).

3. A nitrochlorobenzene tail gas treatment device according to claim 1, characterized in that: The upper and lower end surfaces of the processing box (1) are provided with a discharge pipe (4), and the discharge pipe (4) is provided with a control component (6) for controlling the discharge of the discharge pipe (4). The control component (6) comprises a mounting block (61), a sliding plate (62) and a driving member (64). The mounting block (61) is provided on the discharge pipe (4), and a sliding cavity (612) perpendicular to the length direction of the discharge pipe (4) is provided inside the mounting block (61), and the sliding cavity (612) is communicated with the discharge pipe (4), and the sliding plate (62) is slidably connected in the sliding cavity (612), and a connecting hole (621) is provided on the sliding plate (62), and the driving member (64) is used to drive the sliding plate (62) to slide along the length direction of the sliding cavity (612).

4. A nitrochlorobenzene tail gas treatment device according to claim 3, characterized in that: The driving member (64) comprises a floating plate (641) and two connecting blocks (642); the floating plate (641) is connected to the processing box (1) by sliding in the vertical direction; the connecting blocks (642) are arranged on the floating plate (641); the two connecting blocks (642) are respectively located on both sides of the sliding plate (62); the connecting blocks (642) are provided with guiding inclined surfaces (646) for facilitating the sliding plate (62) to slide along the length direction of the sliding cavity (612); and the two connecting blocks (642) have different heights.

5. A nitrochlorobenzene tail gas treatment device according to claim 4, characterized in that: The processing box (1) is provided with a discharge port (11), the height of the discharge port (11) is higher than the connection between the discharge pipe (4) and the processing box (1), and the processing box (1) is provided with a blocking plate (643) for controlling the closing or opening of the discharge port (11), and the blocking plate (643) is arranged on the floating plate (641).

6. A nitrochlorobenzene tail gas treatment device according to claim 5, characterized in that: The processing box (1) is also provided with a switch assembly (7) for controlling the feeding of the feed pipe (2), the switch assembly (7) comprising an electromagnetic control valve (71), a control block (72) and two control switches (73), the electromagnetic control valve (71) being provided on the feed pipe (2), the control block (72) being provided on the floating plate (641), and the control switch (73) being provided on the processing box (1), the two control switches (73) being distributed in a vertical direction, and the control block (72) being located between the two control switches (73).

7. The device for treating nitrochlorobenzene tail gas according to claim 1, characterized in that: The processing box (1) is provided with a heat recovery component (8), the heat recovery component (8) comprising a plurality of heat conducting plates (81), a heat conducting cover (82) and a heat conducting pipe (83), the heat conducting plates (81) being arranged on the lower end surface of the processing box (1), the heat conducting cover (82) being arranged on the lower end surface of the processing box (1) and covering the plurality of heat conducting plates (81), and the heat conducting pipe (83) being arranged on the heat conducting cover (82) and communicating with the heat conducting cover (82).

8. The device for treating nitrochlorobenzene tail gas according to claim 3, characterized in that: The bottom of the processing box (1) is arranged at an inclination, and the discharge pipe (4) is arranged at the lowest point of the processing box (1).

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