Tower type device for producing dichlorotoluene through continuous chlorination

Abstract

The utility model discloses a tower-type device for producing dichlorotoluene through continuous chlorination, which belongs to the technical field of chemical engineering and is characterized by comprising a chlorination tower, a toluene feeding structure is arranged on the left side of the chlorination tower, a chlorine feeding structure is arranged on the left side of the toluene feeding structure, and a purification box is arranged on the right side of the chlorination tower. The inner wall of the purification box is in sliding connection with a purification mechanism, the inner wall of the purification mechanism is in bolted connection with a placement assembly, and the problems that an existing tower-type device for producing dichlorotoluene through continuous chlorination is prone to saturation failure in long-term use, tail gas contains a large amount of toxic and harmful gas, and if emission does not reach the standard, the tail gas cannot be purified are solved. The problems that combustible or poisonous gas is accumulated around the device, and once a fire source or other triggering factors occur, serious safety accidents such as explosion and fire disasters are likely to be caused, and the life safety of operators and the property safety of enterprises are threatened are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical industry, in particular to a tower-type continuous chlorination device for producing dichlorotoluene. Background Art

[0002] The tower-type continuous chlorination device for producing dichlorotoluene is an equipment system specifically used to continuously convert toluene into dichlorotoluene through a chlorination reaction. The device usually consists of a chlorination tower, a feeding system, a chlorine supply system, a cooling system, an exhaust gas treatment system, etc. The chlorination tower is the core component, in which the continuous chlorination reaction of toluene is carried out.

[0003] The traditional production process system for o-chlorotoluene and p-chlorotoluene is relatively backward, and the production equipment has not been improved. This results in high production costs, low synthesis rates, low production capacity and purity of o-chlorotoluene and p-chlorotoluene, which in turn affects economic benefits and restricts the application and development of downstream fine chemicals.

[0004] An existing patent (publication number: CN213943065U) discloses a production process system for o-chlorotoluene and p-chlorotoluene, comprising a tail gas absorption device, an o-chlorotoluene tower, and sequentially connected dryers, chlorination towers, distillation towers, toluene removal towers, dichlorotoluene removal towers, primary separation towers, crystallization towers, and p-chlorotoluene refining towers. This utility model has a reasonable design, high equipment utilization, relatively low energy consumption, a closed and controllable reaction environment, and is environmentally friendly and pollution-free. It can effectively improve the synthesis rate, production capacity, and purity of o-chlorotoluene and p-chlorotoluene, reduce production costs, thereby improving economic benefits and facilitating the application and development of downstream fine chemicals.

[0005] In response to the above problems, existing patents have provided solutions. However, the existing tower-type continuous chlorination device for producing dichlorotoluene is prone to saturation failure during long-term use. The tail gas contains a large amount of toxic and harmful gases. If the emission does not meet the standards, flammable or toxic gases will accumulate around the device. Once encountering a fire source or other triggering factors, it is easy to cause serious safety accidents such as explosions and fires, threatening the life safety of operators and the property safety of the company. In addition, substandard tail gas treatment means that there is an incomplete reaction during the reaction process, which will lead to an increase in the impurity content in the product.

[0006] Therefore, a device for producing dichlorotoluene by tower-type continuous chlorination is proposed. Utility Model Content

[0007] The purpose of the utility model is to provide a tower-type continuous chlorination device for producing dichlorotoluene, which can solve the problem that the existing tower-type continuous chlorination device for producing dichlorotoluene is prone to saturation failure during long-term use. The tail gas contains a large amount of toxic and harmful gases. If the emission does not meet the standards, accumulation of combustible or toxic gases will form around the device. Once encountering a fire source or other triggering factors, it is easy to cause serious safety accidents such as explosion and fire, threatening the life safety of operators and the property safety of enterprises. In addition, the failure of tail gas treatment to meet the standards means that there is an incomplete reaction in the reaction process, which will lead to the problem of increased impurity content in the product.

[0008] To achieve the above object, the utility model provides the following technical solution: a tower-type continuous chlorination device for producing dichlorotoluene, comprising a chlorination tower, a toluene feeding structure placed on the left side of the chlorination tower, a chlorine feeding structure placed on the left side of the toluene feeding structure, a purification box placed on the right side of the chlorination tower, a purification mechanism slidably connected to the inner wall of the purification box, a placement component bolted to the inner wall of the purification mechanism, a spraying component provided on the inner wall of the purification box, and a discharge pipe fixedly connected to the top of the purification box;

[0009] The purification mechanism includes an adsorbent, a slider and a placement rack. The side of the slider close to the placement rack is bolted to the placement rack, the surface of the slider is slidably connected to the inner wall of the purification box, the surface of the placement component is bolted to the inner wall of the placement rack, and the adsorbent is placed on the top of the placement component.

[0010] Preferably, a fixing block is bolted to the inner wall of the purification box, a connecting block is bolted to the left side of the fixing block, and the left side of the connecting block is bolted to the right side of the spray assembly.

[0011] Preferably, the spray assembly includes a connecting pipe, a connecting frame and an atomizing nozzle, the top of the atomizing nozzle is fixedly connected to the bottom of the connecting frame, the bottom of the connecting pipe is fixedly connected to the top of the connecting frame, the right side of the connecting frame is bolted to the left side of the connecting block, and the surface of the connecting pipe is fixedly connected to the inner wall of the purification box.

[0012] Preferably, a pump body is provided on the right side of the purification box, and the top of the pump body is fixedly connected to the bottom of the connecting pipe.

[0013] Preferably, the placement assembly includes a placement net and a mounting frame, the surface of the placement net is fixedly connected to the inner wall of the mounting frame, and the surface of the mounting frame is bolted to the inner wall of the placement frame.

[0014] Preferably, the top of the chlorination tower is fixedly connected to a transmission structure, the bottom of the transmission structure is fixedly connected to a fan structure, and the right side of the fan structure is fixedly connected to the left side of the purification box.

[0015] Preferably, a fixing assembly is bolted to the left side of the chlorination tower, a monitoring assembly is bolted to the top of the fixing assembly, and an alarm is bolted to the left side of the fixing assembly.

[0016] Preferably, the monitoring assembly includes a detection head, a gas monitor and a support block, the bottom of the support block is bolted to the top of the fixed assembly, the right side of the support block is bolted to the left side of the gas monitor, and the right side of the gas monitor is bolted to the left side of the detection head.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The present application sets a purification mechanism. When in use, the raw materials inside the toluene feeding structure are transported to the inside of the chlorination tower to ensure that toluene can stably and continuously enter the chlorination tower to participate in the chlorination reaction. Then, the chlorine inside the chlorine feeding structure is transported to the chlorination tower to undergo a continuous chlorination reaction with toluene in the chlorination tower to generate dichlorotoluene. The tail gas is transported to the inside of the purification box, so that the adsorbent on the inner wall of the placement rack is continuously adsorbed. After the adsorbent has been used for a certain period of time, the closed door of the purification box can be directly opened, and the slider is pulled on the inner wall of the purification box by the placement rack to slide, so that the adsorbent can be conveniently replaced. This avoids the situation where the tail gas cannot be effectively purified due to the failure of the adsorbent, ensures that the purification mechanism can always maintain good adsorption and purification capabilities, and provides an important guarantee for the compliance of tail gas emissions.

[0019] 2. The present application sets a spraying component, which sprays while the adsorbent is adsorbing. The function of spraying is to work in coordination with the adsorbent. The sprayed liquid (such as a specific purification liquid, etc.) can react chemically with the harmful substances in the tail gas to convert the harmful substances into harmless substances. At the same time, the droplets formed by the spraying can increase the contact area and reaction opportunity between the tail gas and the purification liquid, and work together with the adsorbent to greatly improve the purification effect of the entire purification box on the tail gas. The purification box is connected to the chlorination tower through a discharge pipe, and the tail gas discharged from the chlorination tower enters the purification box. The spraying component works in the purification box. When the tail gas enters the purification box, the spraying component starts to spray the purification liquid, and together with the adsorbent, the harmful substances in the tail gas are subjected to dual treatment, so that the harmful substances in the tail gas can be removed more quickly and thoroughly, effectively improving the possibility of meeting the tail gas emission standards and avoiding the excessive emission of harmful substances in the tail gas due to insufficient purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the overall structural diagram of the tower-type continuous chlorination device for producing dichlorotoluene of the present utility model;

[0021] Figure 2 This is a front view of the chlorination tower of the utility model;

[0022] Figure 3This is a structural diagram of the purification box of the utility model;

[0023] Figure 4 This is a structural diagram of the purification mechanism of the utility model;

[0024] Figure 5 A structural diagram showing the placement of components for this utility model;

[0025] Figure 6 This is a structural diagram of the spray assembly of the utility model;

[0026] Figure 7 This is a structural diagram of the monitoring component of the utility model.

[0027] In the figure, 1. chlorination tower; 2. purification mechanism; 201. adsorbent; 202. slider; 203. placement rack; 3. placement component; 301. placement net; 302. mounting rack; 4. spray component; 401. connecting pipe; 402. connecting rack; 403. atomizing nozzle; 5. monitoring component; 501. detection head; 502. gas monitor; 503. support block; 6. toluene feed structure; 7. chlorine feed structure; 8. purification box; 9. discharge pipe; 10. pump body; 11. transmission structure; 12. fan structure; 13. fixing component; 14. alarm; 15. fixing block; 16. connecting block. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-7 , this utility model provides a technical solution:

[0030] A tower-type continuous chlorination device for producing dichlorotoluene comprises a chlorination tower 1, a toluene feeding structure 6 is placed on the left side of the chlorination tower 1, a chlorine feeding structure 7 is placed on the left side of the toluene feeding structure 6, a purification box 8 is placed on the right side of the chlorination tower 1, a purification mechanism 2 is slidably connected to the inner wall of the purification box 8, a placement component 3 is bolted to the inner wall of the purification mechanism 2, a spraying component 4 is provided on the inner wall of the purification box 8, and a discharge pipe 9 is fixedly connected to the top of the purification box 8;

[0031] The purification mechanism 2 includes an adsorbent 201, a slider 202 and a placement rack 203. The slider 202 is bolted to the placement rack 203 on one side close to the placement rack 203. The surface of the slider 202 is slidably connected to the inner wall of the purification box 8. The surface of the placement component 3 is bolted to the inner wall of the placement rack 203. The adsorbent 201 is placed on the top of the placement component 3.

[0032] In the present embodiment: by purifying mechanism 2 is set, during use, the raw material inside the toluene feed structure 6 is transported to the inside of the chlorination tower 1, guarantee that toluene can stably and continuously enter the chlorination tower 1 and participate in chlorination reaction, then the chlorine inside the chlorine feed structure 7 is transported to the chlorination tower 1, carry out continuous chlorination reaction with toluene in the chlorination tower 1, to generate dichlorotoluene, tail gas can be transported to the inside of the purification box 8, the adsorbent 201 on the inner wall of the placement rack 203 is carried out the work of continuous adsorption, after adsorbent 201 has been used for a certain period of time, the closed door of the purification box 8 can be directly opened, the slide block 202 is pulled on the inner wall of the purification box 8 by the placement rack 203 to slide, the work of convenient type replacement of adsorbent 201 can be realized, so just avoided the situation that can't effectively purify tail gas because of adsorbent 201 failure, guaranteed that purifying mechanism 2 can keep good adsorption purification ability all the time, for the tail gas discharge standard provides important guarantee, by arranging spray assembly 4, The spraying assembly 4 sprays while the adsorbent 201 is adsorbing. The effect of spraying is that it can work in coordination with the adsorbent 201. The sprayed liquid (such as a specific purification liquid, etc.) can react chemically with the harmful substances in the tail gas to convert the harmful substances into harmless substances. At the same time, the droplets formed by spraying can increase the contact area and reaction opportunity between the tail gas and the purification liquid, and work together with the adsorbent 201 to greatly improve the purification effect of the entire purification box 8 on the tail gas. The purification box 8 is connected to the chlorination tower 1 through the discharge pipe 9. The tail gas discharged from the chlorination tower 1 enters the purification box 8. The spraying assembly 4 works in the purification box 8. After the tail gas enters the purification box 8, the spraying assembly 4 starts to spray the purification liquid, and together with the adsorbent 201, the harmful substances in the tail gas are subjected to dual treatment, so that the harmful substances in the tail gas can be removed more quickly and thoroughly, effectively improving the possibility of meeting the tail gas emission standards, and avoiding the harmful substances in the tail gas from exceeding the emission standards due to insufficient purification.

[0033] Specifically, such as Figure 6 As shown, a fixing block 15 is bolted to the inner wall of the purification box 8 , a connecting block 16 is bolted to the left side of the fixing block 15 , and the left side of the connecting block 16 is bolted to the right side of the spray assembly 4 .

[0034] Specifically, such as Figure 6As shown, the spray assembly 4 includes a connecting pipe 401, a connecting frame 402 and an atomizing nozzle 403. The top of the atomizing nozzle 403 is fixedly connected to the bottom of the connecting frame 402, the bottom of the connecting pipe 401 is fixedly connected to the top of the connecting frame 402, the right side of the connecting frame 402 is bolted to the left side of the connecting block 16, and the surface of the connecting pipe 401 is fixedly connected to the inner wall of the purification box 8.

[0035] Specifically, such as Figure 6 As shown, a pump body 10 is provided on the right side of the purification box 8 , and the top of the pump body 10 is fixedly connected to the bottom of the connecting pipe 401 .

[0036] In this embodiment: the fixed block 15 and the connecting block 16 provide stable installation support for the spray assembly 4. The spray assembly 4 composed of the connecting pipe 401, the connecting frame 402 and the atomizing nozzle 403 can evenly spray the purified liquid into a mist under the action of the pump body 10. The atomizing nozzle 403 forms tiny droplets of purified liquid, which greatly increases the contact area with the exhaust gas and improves the reaction efficiency. The pump body 10 provides power for the spraying of the purified liquid to ensure the intensity and uniformity of the spraying. On the whole, the spray assembly 4 can work in conjunction with the adsorbent 201 in the purification mechanism 2 to further improve the purification effect of the exhaust gas and provide a strong guarantee for the exhaust gas to meet the emission standards.

[0037] Specifically, such as Figure 5 As shown, the placement assembly 3 includes a placement net 301 and a mounting frame 302 . The surface of the placement net 301 is fixedly connected to the inner wall of the mounting frame 302 , and the surface of the mounting frame 302 is bolted to the inner wall of the placement frame 203 .

[0038] Specifically, such as Figure 2 As shown, the top of the chlorination tower 1 is fixedly connected to a transmission structure 11 , the bottom of the transmission structure 11 is fixedly connected to a fan structure 12 , and the right side of the fan structure 12 is fixedly connected to the left side of the purification box 8 .

[0039] In this embodiment: the placement component 3 composed of a placement net 301 and a mounting frame 302, the placement net 301 can stably carry the adsorbent 201 without hindering the full contact between the adsorbent 201 and the tail gas, the connection between the mounting frame 302 and the placement frame 203 ensures the firmness of the placement component 3, the transmission structure 11 and the fan structure 12 at the top of the chlorination tower 1 can promptly transport the tail gas generated by the chlorination reaction to the purification box 8 for treatment, ensuring that the tail gas will not accumulate around the chlorination tower 1, thereby improving the safety of the production environment and ensuring the timeliness and efficiency of the tail gas purification.

[0040] Specifically, such as Figure 1 、 Figure 2 、 Figure 7As shown, a fixing assembly 13 is bolted to the left side of the chlorination tower 1 , a monitoring assembly 5 is bolted to the top of the fixing assembly 13 , and an alarm 14 is bolted to the left side of the fixing assembly 13 .

[0041] Specifically, such as Figure 7 As shown, the monitoring component 5 includes a detection head 501, a gas monitor 502 and a support block 503. The bottom of the support block 503 is bolted to the top of the fixed component 13, the right side of the support block 503 is bolted to the left side of the gas monitor 502, and the right side of the gas monitor 502 is bolted to the left side of the detection head 501.

[0042] In this embodiment: the fixing assembly 13 provides a stable installation position for the monitoring assembly 5 and the alarm 14, the detection head 501 can accurately detect the gas composition around the chlorination tower 1, and the gas monitor 502 performs real-time analysis on the detected gas. Once a tail gas leak is found, the alarm 14 is immediately triggered to sound an alarm, which can promptly remind the operating personnel to take corresponding measures to avoid pollution to the environment due to excessive discharge of tail gas, while also ensuring the safety of the production process.

[0043] Working principle: During the use of the chlorination tower 1, the purification mechanism 2 is set up. When in use, the raw materials inside the toluene feeding structure 6 are transported to the inside of the chlorination tower 1 to ensure that toluene can stably and continuously enter the chlorination tower 1 to participate in the chlorination reaction. Then the chlorine inside the chlorine feeding structure 7 is transported to the chlorination tower 1, and a continuous chlorination reaction is carried out with toluene in the chlorination tower 1 to generate dichlorotoluene. The tail gas will be transported to the inside of the purification box 8, so that the adsorbent 201 on the inner wall of the placement rack 203 is continuously adsorbed. After the adsorbent 201 has been used for a certain period of time, the closed door of the purification box 8 can be directly opened, and the slider 202 is pulled by the placement rack 203 to slide on the inner wall of the purification box 8, so that the adsorbent 201 can be conveniently replaced. In this way, the situation that the tail gas cannot be effectively purified due to the failure of the adsorbent 201 is avoided, and it is ensured that the purification mechanism 2 can always maintain a good adsorption and purification capacity, which provides an important guarantee for the standard emission of tail gas. Sprinkle component 4, spray component 4 sprays while adsorbent 201 is adsorbing, the effect of spraying is that it can work in coordination with adsorbent 201, the sprayed liquid (such as specific purification liquid, etc.) can react chemically with the harmful substances in the tail gas, converting the harmful substances into harmless substances, and at the same time, the droplets formed by spraying can increase the contact area and reaction opportunity between the tail gas and the purification liquid, and work together with adsorbent 201, greatly improving the purification effect of the entire purification box 8 on the tail gas, the purification box 8 is connected to the chlorination tower 1 through the discharge pipe 9, the tail gas discharged from the chlorination tower 1 enters the purification box 8, the spray component 4 works in the purification box 8, after the tail gas enters the purification box 8, the spray component 4 starts to spray the purification liquid, and together with the adsorbent 201, the harmful substances in the tail gas are subjected to dual treatment, so that the harmful substances in the tail gas can be removed more quickly and thoroughly, effectively improving the possibility of tail gas emission meeting the standards, and avoiding the harmful substances in the tail gas from exceeding the standards due to not being fully purified.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for producing dichlorotoluene by tower-type continuous chlorination, comprising a chlorination tower (1), characterized in that: A toluene feeding structure (6) is placed on the left side of the chlorination tower (1), a chlorine feeding structure (7) is placed on the left side of the toluene feeding structure (6), a purification box (8) is placed on the right side of the chlorination tower (1), the inner wall of the purification box (8) is slidably connected to the purification mechanism (2), the inner wall of the purification mechanism (2) is bolted with a placement component (3), the inner wall of the purification box (8) is provided with a spraying component (4), and the top of the purification box (8) is fixedly connected to a discharge pipe (9); The purification mechanism (2) comprises an adsorbent (201), a slider (202) and a placement rack (203); the slider (202) is bolted to the placement rack (203) on one side close to the placement rack (203); the surface of the slider (202) is slidably connected to the inner wall of the purification box (8); the surface of the placement component (3) is bolted to the inner wall of the placement rack (203); and the adsorbent (201) is placed on the top of the placement component (3).

2. a device for producing dichlorotoluene by tower-type continuous chlorination according to claim 1, characterized in that: A fixing block (15) is bolted to the inner wall of the purification box (8), a connecting block (16) is bolted to the left side of the fixing block (15), and the left side of the connecting block (16) is bolted to the right side of the spray assembly (4).

3. A device for producing dichlorotoluene by tower-type continuous chlorination according to claim 2, characterized in that: The spray assembly (4) comprises a connecting pipe (401), a connecting frame (402) and an atomizing nozzle (403); the top of the atomizing nozzle (403) is fixedly connected to the bottom of the connecting frame (402); the bottom of the connecting pipe (401) is fixedly connected to the top of the connecting frame (402); the right side of the connecting frame (402) is bolted to the left side of the connecting block (16); and the surface of the connecting pipe (401) is fixedly connected to the inner wall of the purification box (8).

4. A device for producing dichlorotoluene by tower-type continuous chlorination according to claim 3, characterized in that: A pump body (10) is provided on the right side of the purification box (8), and the top of the pump body (10) is fixedly connected to the bottom of the connecting pipe (401).

5. A device for producing dichlorotoluene by tower-type continuous chlorination according to claim 1, characterized in that: The placement assembly (3) comprises a placement net (301) and a mounting frame (302), the surface of the placement net (301) is fixedly connected to the inner wall of the mounting frame (302), and the surface of the mounting frame (302) is bolted to the inner wall of the placement frame (203).

6. A device for producing dichlorotoluene by tower-type continuous chlorination according to claim 1, characterized in that: The top of the chlorination tower (1) is fixedly connected to a transmission structure (11), the bottom of the transmission structure (11) is fixedly connected to a fan structure (12), and the right side of the fan structure (12) is fixedly connected to the left side of the purification box (8).

7. A device for producing dichlorotoluene by tower-type continuous chlorination according to claim 1, characterized in that: A fixing assembly (13) is bolted to the left side of the chlorination tower (1), a monitoring assembly (5) is bolted to the top of the fixing assembly (13), and an alarm (14) is bolted to the left side of the fixing assembly (13).

8. A device for producing dichlorotoluene by tower-type continuous chlorination according to claim 7, characterized in that: The monitoring component (5) includes a detection head (501), a gas monitor (502) and a support block (503), wherein the bottom of the support block (503) is bolted to the top of the fixing component (13), the right side of the support block (503) is bolted to the left side of the gas monitor (502), and the right side of the gas monitor (502) is bolted to the left side of the detection head (501).

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