An industrial formaldehyde production exhaust gas treatment device

Abstract

This application relates to the technical field of formaldehyde treatment equipment and discloses an industrial formaldehyde production tail gas treatment device, including a mounting frame fixedly installed in the middle of the inner cavity of a spray tower. The inner cavity of the mounting frame is provided with several sets of spray components. Each spray component includes a support frame fixedly installed at the bottom of the inner cavity of the mounting frame, and a first guide element is movably sleeved inside the support frame. Simultaneously, a second guide element extending to the bottom of the support frame is movably sleeved inside the first guide element. In this industrial formaldehyde production tail gas treatment device, regarding the arrangement of the spray components and their structures, during the operation of the spray tower, as formaldehyde tail gas accumulates at the bottom of the inner cavity, the gas pressure of the formaldehyde tail gas at the bottom of the inner cavity increases accordingly, forcing the second guide element to move upwards. This allows the formaldehyde tail gas to enter the gap formed between the first guide element and the support frame, thereby effectively increasing the contact time between the formaldehyde tail gas and water.

Description

Technical Field

[0001] This application relates to the field of formaldehyde treatment equipment technology, and in particular to an industrial formaldehyde production tail gas treatment equipment. Background Technology

[0002] Formaldehyde, as a chemical raw material, can be widely used in resin synthesis, plastic production, textile industry and anti-corrosion and disinfection, but it is also a toxic gas that can seriously endanger human health. Therefore, in the industrial production process of formaldehyde, it is crucial to effectively treat formaldehyde exhaust gas to prevent it from leaking out and causing harm.

[0003] Among them, water spray absorption is the most basic formaldehyde treatment process. It takes advantage of the fact that formaldehyde is easily soluble in water to make the exhaust gas containing formaldehyde come into contact with water to transfer the formaldehyde to the liquid phase. In order to further improve the removal rate of formaldehyde exhaust gas, chemical agents such as urea and sodium sulfite are often added to the water to react irreversibly with formaldehyde, thereby effectively improving the removal rate of formaldehyde in exhaust gas by water spray absorption.

[0004] However, in the existing water spray absorption method, the effective contact time between the aqueous solution containing chemical agents such as urea and sodium sulfite sprayed through the nozzle and the formaldehyde exhaust gas is relatively short. Furthermore, because the sprayed aqueous solution is relatively dispersed and difficult to form a water curtain, some formaldehyde gas cannot come into contact with the aqueous solution and be absorbed, which greatly reduces its removal rate of formaldehyde in the exhaust gas.

[0005] Therefore, there is an urgent need for a spray structure for formaldehyde exhaust gas treatment to solve the defects of the existing water spray absorption method in actual operation. Summary of the Invention

[0006] This application proposes an industrial formaldehyde production tail gas treatment device, which has the advantage of effectively extending the contact time between formaldehyde tail gas and aqueous solution, thereby achieving a higher formaldehyde removal rate in the tail gas. This addresses the problem in existing water spray absorption methods where the effective contact time between the aqueous solution containing chemical agents such as urea and sodium sulfite sprayed through nozzles and the formaldehyde tail gas is short, and because the sprayed aqueous solution is relatively dispersed and difficult to form a water curtain, some formaldehyde gas cannot come into contact with the aqueous solution and be absorbed, resulting in a low formaldehyde removal rate in the tail gas.

[0007] To achieve the above objectives, this application adopts the following technical solution: an industrial formaldehyde production tail gas treatment device, comprising a mounting frame fixedly installed in the middle of the inner cavity of a spray tower by bolts, wherein the inner cavity of the mounting frame is provided with several sets of spray components for contact between formaldehyde tail gas and water, and a first conveying pipe is provided in the spray components, one end of which is connected to a water conveying system, thereby conveying water to each set of spray components through the first conveying pipe. The spray components include a support frame fixedly installed at the bottom of the inner cavity of the mounting frame, and a first guide member is movably sleeved inside the support frame, the top end of the first guide member being fixed. The first connecting rod is equipped with several sets of first connecting rods arranged in a ring array. The outer surface of the first connecting rod is movably sleeved with a first elastic element and forms a transmission connection with the top of the inner cavity of the support frame. Initially, under the elastic force of the first elastic element, the bottom end of the first guide member contacts the bottom of the inner cavity of the support frame. Several sets of flow grooves arranged in a ring array extending to the bottom of the inner cavity and connected to the first conveying pipeline are opened inside the first guide member. Then, when water flows, under the pressure of the water, the first guide member can be forced to move upward and form a gap for water supply between it and the bottom of the inner cavity of the support frame.

[0008] Meanwhile, a second guide member is movably sleeved inside the first guide member, extending to the bottom of the support frame. Several sets of second connecting rods arranged in a ring array are fixedly installed at the top of the second guide member, and a second elastic member is movably sleeved on the outer surface of the second connecting rod to form a transmission connection with the top of the inner cavity of the support frame.

[0009] Furthermore, the flow channel includes a first flow channel and a second connecting channel. One end of the first flow channel extends to the bottom of the first guide member, and the other end of the first flow channel extends to the bottom of the inner cavity of the first guide member. One end of the second connecting channel extends to the top of the inner cavity of the first guide member, and the other end of the second connecting channel extends to the top of the outer surface of the first guide member. Thus, when the second guide member moves upward, it can force the first flow channel and the second connecting channel to communicate with each other to allow water to flow. Under the pressure of the water, the first guide member moves upward and forms a gap for water supply between it and the bottom of the inner cavity of the support frame.

[0010] Furthermore, a flow guide ring with an annular structure corresponding to the other end of the second connecting groove is fixedly installed on the top of the inner cavity of the support frame. The inner side of the flow guide ring is in sliding sealing contact with the top of the outer surface of the first flow guide. A connecting pipe is provided inside the support frame, with one end extending into the inside of the flow guide ring and the other end connected to the first conveying pipeline or another set of spray components. Thus, under the action of the flow guide ring and the connecting pipe, the water flowing in the first conveying pipeline can flow stably into each set of spray components.

[0011] Furthermore, a connecting rod is movably sleeved in the inner cavity of the second guide member, and a diversion plate is fixedly installed at the top of the connecting rod. The connecting rod is connected to the inner cavity of the diversion plate. The diversion plate is provided with a second delivery pipe with one end connected to the chemical agent delivery system. The chemical agent can then be delivered to each group of spray components through the second delivery pipe and dissolved in water to form a neutralizing agent that can absorb formaldehyde.

[0012] Furthermore, the connecting rod has a through hole connecting its inner cavity to the bottom of its outer surface, and the second guide has a third connecting groove connecting its inner cavity to the middle of its outer surface. Initially, the through hole is located directly above the third connecting groove. When the second guide moves upward under the gas pressure of formaldehyde exhaust gas, it can automatically connect the through hole and the third connecting groove to deliver the chemical agent to the water and form a neutralizing agent that can absorb formaldehyde, thereby further improving its formaldehyde removal rate in the exhaust gas.

[0013] Furthermore, the third connecting groove is equipped with a one-way control valve, which can effectively prevent the neutralizing agent or formaldehyde exhaust gas from flowing into the chemical agent delivery system through the connecting rod during the operation of the spraying component, thus preventing chemical agent pollution.

[0014] Furthermore, the bottom of the outer surface of the mounting frame is provided with a drain trough for discharging chemical wastewater after formaldehyde absorption, the bottom of which is flush with the bottom of the spray component.

[0015] The beneficial effects of this invention are as follows:

[0016] This application provides an industrial formaldehyde production tail gas treatment device. Regarding the arrangement of the spray components and their structures, during the operation of the spray tower, as formaldehyde tail gas accumulates at the bottom of the inner cavity, the pressure of the formaldehyde tail gas at the bottom of the inner cavity also increases, forcing the second guide component to move upwards. This allows the formaldehyde tail gas to enter the gap formed between the first guide component and the support frame, and to come into contact with the water flowing through it. This effectively increases the contact time between the formaldehyde tail gas and the water, resulting in a higher removal rate of formaldehyde from the tail gas. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a front view of the structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the spray component of the present invention;

[0021] Figure 4 This is a front view of the spray component of the present invention;

[0022] Figure 5 This is a schematic diagram of the support frame of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the first flow guide of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the second flow guide of the present invention.

[0025] In the diagram: 1-mounting bracket, 2-spraying component, 3-first conveying pipeline, 4-drainage plate, 5-second conveying pipeline, 6-drainage trough, 7-support frame, 8-guide ring, 9-connecting pipe, 10-first guide element, 11-first flow channel, 12-second connecting channel, 13-first connecting rod, 14-first elastic element, 15-second guide element, 16-third connecting channel, 17-second connecting rod, 18-second elastic element, 19-connecting rod, 20-through hole, 21-one-way control valve. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figure 1 , Figure 2 As shown, an industrial formaldehyde production exhaust gas treatment device includes a mounting frame 1 fixedly installed in the middle of the inner cavity of a spray tower by bolts. The inner cavity of the mounting frame 1 is provided with several sets of spray components 2 for contact between formaldehyde exhaust gas and water. Each spray component 2 has a first conveying pipe 3 connected at one end to a water conveying system, thereby allowing water to be conveyed to each set of spray components 2 via the first conveying pipe 3. Figure 3 , Figure 6 as well as Figure 7As shown, the spray component 2 includes a support frame 7 fixedly installed at the bottom of the inner cavity of the mounting frame 1, and a first guide member 10 is movably sleeved inside the support frame 7. Several sets of first connecting rods 13 arranged in a ring array are fixedly installed at the top of the first guide member 10. A first elastic member 14 is movably sleeved on the outer surface of the first connecting rod 13 and forms a transmission connection with the top of the inner cavity of the support frame 7. Initially, under the elastic force of the first elastic member 14, the bottom end of the first guide member 10 contacts the bottom of the inner cavity of the support frame 7. Several sets of flow grooves arranged in a ring array extending to the bottom of the inner cavity and connected to the first conveying pipe 3 are opened inside the first guide member 10. Then, when water flows, under the pressure of the water, the first guide member 10 can be forced to move upward and form a gap for water supply flow between it and the bottom of the inner cavity of the support frame 7.

[0028] Meanwhile, a second guide 15 extending to the bottom of the support frame 7 is movably sleeved inside the first guide 10. Several sets of second connecting rods 17 arranged in a ring array are fixedly installed at the top of the second guide 15. A second elastic member 18 is movably sleeved on the outer surface of the second connecting rod 17 to form a transmission connection with the top of the inner cavity of the support frame 7.

[0029] During the operation of the spray tower, as formaldehyde exhaust gas accumulates at the bottom of the inner cavity of the spray tower, the pressure of the formaldehyde exhaust gas at the bottom of the inner cavity will also increase, forcing the second guide component 15 to move upward, so that the formaldehyde exhaust gas enters the gap formed between the first guide component 10 and the support frame 7, and comes into contact with the water flowing in it, so as to effectively increase the contact time between the formaldehyde exhaust gas and the water, and thus make the removal rate of formaldehyde in the exhaust gas higher.

[0030] like Figure 3 , Figure 6 As shown, in this technical solution, the flow channel includes a first flow channel 11 and a second connecting channel 12. One end of the first flow channel 11 extends to the bottom of the first guide member 10, and the other end of the first flow channel 11 extends to the bottom of the inner cavity of the first guide member 10. One end of the second connecting channel 12 extends to the top of the inner cavity of the first guide member 10, and the other end of the second connecting channel 12 extends to the top of the outer surface of the first guide member 10. Thus, when the second guide member 15 moves upward, it can force the first flow channel 11 and the second connecting channel 12 to communicate with each other to allow water to flow. Under the pressure of the water, the first guide member 10 moves upward and forms a gap for water supply between it and the bottom of the inner cavity of the support frame 7.

[0031] like Figure 1 , Figure 3 , Figure 5 as well as Figure 6As shown, in this technical solution, a guide ring 8 with an annular structure and corresponding to the other end of the second connecting groove 12 is fixedly installed on the top of the inner cavity of the support frame 7. The inner side of the guide ring 8 is in sliding sealing contact with the top of the outer surface of the first guide member 10. A connecting pipe 9 is provided inside the support frame 7, with one end extending into the interior of the guide ring 8 and the other end connected to the first conveying pipeline 3 or another set of spray components 2. Thus, under the action of the guide ring 8 and the connecting pipe 9, the water flowing in the first conveying pipeline 3 can flow stably into each set of spray components 2.

[0032] like Figure 1 , Figure 3 as well as Figure 4 As shown, in this technical solution, a connecting rod 19 is movably sleeved in the inner cavity of the second guide member 15, and a diversion plate 4 is fixedly installed at the top of the connecting rod 19. The connecting rod 19 is connected to the inner cavity of the diversion plate 4. The diversion plate 4 is provided with a second conveying pipe 5, one end of which is connected to the chemical agent conveying system. The chemical agent can then be conveyed to each group of spray components 2 through the second conveying pipe 5 and mixed with water to form a neutralizing agent that can absorb formaldehyde.

[0033] like Figure 3 , Figure 4 as well as Figure 7 As shown, in this technical solution, the connecting rod 19 has a through hole 20 inside, connecting its inner cavity to the bottom of its outer surface. The second guide 15 has a third connecting groove 16 inside, connecting its inner cavity to the middle of its outer surface. Initially, the through hole 20 is located directly above the third connecting groove 16. When the second guide 15 moves upward under the gas pressure of formaldehyde exhaust gas, it can automatically connect the through hole 20 and the third connecting groove 16 to deliver the chemical agent to the water and form a neutralizing agent that can absorb formaldehyde, thereby further improving its formaldehyde removal rate in the exhaust gas.

[0034] like Figure 7 As shown, in this technical solution, the third connecting groove 16 is equipped with a one-way control valve 21, which can effectively prevent the neutralizing agent or formaldehyde exhaust gas from flowing into the chemical agent delivery system through the connecting rod 19 during the operation of the spray component 2, and causing chemical agent pollution.

[0035] like Figure 1 As shown, in this technical solution, the bottom of the outer surface of the mounting bracket 1 is provided with a drain trough 6, the bottom of which is flush with the bottom of the spray component 2, for discharging chemical wastewater after absorbing formaldehyde.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An industrial formaldehyde production tail gas treatment device, comprising a mounting frame (1) fixedly mounted in the middle of the inner cavity of a spray tower, a plurality of groups of spray members (2) are arranged in the inner cavity of the mounting frame (1), and a first conveying pipeline (3) in communication with a water conveying system is arranged in the spray members (2), characterized in that: The spraying member (2) comprises a support frame (7) fixedly installed at the bottom of the inner cavity of the mounting frame (1), a first flow guide member (10) movably sleeved in the inside of the support frame (7), a first connecting rod (13) fixedly installed at the top end of the first flow guide member (10), a first elastic member (14) movably sleeved at the outer surface of the first connecting rod (13) and in transmission connection with the top of the inner cavity of the support frame (7), and a flow-through groove (11) extending to the bottom of the inner cavity of the first flow guide member (10) and in communication with the first conveying pipeline (3) is formed in the inside of the first flow guide member (10). Meanwhile, a second flow guide member (15) extending to the bottom of the support frame (7) is movably sleeved in the inside of the first flow guide member (10), a second connecting rod (17) is fixedly installed at the top end of the second flow guide member (15), and a second elastic member (18) is movably sleeved at the outer surface of the second connecting rod (17) and in transmission connection with the top of the inner cavity of the support frame (7).

2. The industrial formaldehyde production off-gas treatment apparatus according to claim 1, characterized by, The flow-through groove (11) comprises a first flow-through groove (11) and a second flow-through groove (12), one end of the first flow-through groove (11) extends to the bottom of the first flow guide member (10), the other end of the first flow-through groove (11) extends to the bottom of the inner cavity of the first flow guide member (10), one end of the second flow-through groove (12) extends to the top of the inner cavity of the first flow guide member (10), and the other end of the second flow-through groove (12) extends to the top of the outer surface of the first flow guide member (10).

3. The industrial formaldehyde production off-gas treatment apparatus according to claim 2, characterized by, A flow guide ring (8) corresponding to the position of the other end of the second flow-through groove (12) is fixedly installed at the top of the inner cavity of the support frame (7), the inner side of the flow guide ring (8) is in sliding sealing contact with the top of the outer surface of the first flow guide member (10), and a communication pipeline (9) extending to the inside of the flow guide ring (8) at one end and in communication with the first conveying pipeline (3) or another set of spraying members (2) at the other end is arranged in the inside of the support frame (7).

4. The industrial formaldehyde production off-gas treatment apparatus according to claim 3, characterized by A communication rod (19) is movably sleeved in the inner cavity of the second flow guide member (15), a drainage disc (4) is fixedly installed at the top end of the communication rod (19), and the inner cavity of the communication rod (19) is in communication with the inner cavity of the drainage disc (4), and a second conveying pipeline (5) in communication with the chemical agent conveying system is arranged at one end of the drainage disc (4).

5. The industrial formaldehyde production off-gas treatment apparatus according to claim 4, characterized by A through hole (20) is formed in the inside of the communication rod (19) and in communication with the inner cavity and the bottom of the outer surface of the communication rod (19), a third communication groove (16) is formed in the inside of the second flow guide member (15) and in communication with the inner cavity and the middle of the outer surface of the second flow guide member (15), and at the initial time, the through hole (20) is located directly above the third communication groove (16).

6. The industrial formaldehyde production off-gas treatment apparatus according to claim 5, characterized by A one-way control valve (21) is arranged in the inside of the third communication groove (16).

7. The industrial formaldehyde production off-gas treatment apparatus according to claim 1, characterized by, A drainage groove (6) with the bottom of the inner cavity flush with the bottom end of the spraying member (2) is formed at the bottom of the outer surface of the mounting frame (1).

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