Tail gas treatment device in chlorinated paraffin production process

Abstract

The utility model provides a tail gas treatment device in a chlorinated paraffin production process, which belongs to the technical field of tail gas treatment devices and comprises a spraying container, a liquid inlet pipe, a spraying component and a washing unit. The spraying container is provided with an air outlet. The liquid inlet pipe penetrates through the side wall of the spraying container and is fixedly connected with the spraying container. The spraying assembly is located in the spraying container and provided with a spraying head communicated with the interior of the liquid inlet pipe. The washing unit comprises a washing container, a breather pipe and a washing pipe. One end of the breather pipe is communicated with the spraying container, and the other end of the breather pipe is fixedly connected with the washing container and communicated with the washing container. The washing pipe penetrates through the side wall of the washing container and is fixedly connected with the washing container. The washing pipe is provided with a first vertical section located in the washing container. According to the tail gas treatment device in the chlorinated paraffin production process, the problem that the effect of removing hydrogen chloride in tail gas by spraying a sodium chloride solution to the tail gas is poor can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tail gas treatment devices, and more specifically relates to a tail gas treatment device in the production process of chlorinated paraffin. Background Art

[0002] The exhaust gas produced during chlorinated paraffin production contains hydrogen chloride. Currently, this is typically removed using a spray tower. As the exhaust gas passes through the spray tower, a sodium chloride solution is sprayed out. Upon contact with the exhaust gas, the spray liquid absorbs the hydrogen chloride in the exhaust gas, forming a mixture of sodium chloride and hydrochloric acid. However, due to the high velocity of the exhaust gas, the reaction between the exhaust gas and the spray liquid in the spray tower is incomplete. Therefore, simply spraying the sodium chloride solution onto the exhaust gas is ineffective in removing hydrogen chloride from the exhaust gas. Utility Model Content

[0003] The utility model aims to provide a tail gas treatment device in the production process of chlorinated paraffin, aiming to solve the problem of poor effect of removing hydrogen chloride in the tail gas by spraying sodium chloride solution into the tail gas alone.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: to provide an exhaust gas treatment device in the production process of chlorinated paraffin, comprising a spray container, a liquid inlet pipe, a spray assembly and a water washing unit. The top of the spray container is provided with an air outlet. The liquid inlet pipe penetrates the side wall of the spray container and is fixedly connected to the spray container. The spray assembly is located in the spray container, and the spray assembly has a spray head connected to the liquid inlet pipe. The water washing unit comprises a water washing container, a vent pipe and a water washing pipe. The water washing container is located below the spray container. One end of the vent pipe is connected to the inside of the spray container, and the connection point between the spray container and the vent pipe is located below the spray head. The other end of the vent pipe is fixedly connected to the top wall of the water washing container and is connected to the inside of the water washing container. The water washing pipe penetrates the side wall of the water washing container and is fixedly connected to the water washing container. The water washing pipe has a first vertical section that is vertically arranged and located in the water washing container. The port of the water washing pipe on the first vertical section is arranged downward.

[0005] In one possible implementation, the liquid inlet pipe has a second vertical section located within the spray container, and the end of the liquid inlet pipe located on the second vertical section is sealed. The spray assembly further includes a connecting pipe. One end of the connecting pipe is fixedly connected to the second vertical section and communicates with the interior of the second vertical section, and the other end is downwardly disposed and connected to the spray head.

[0006] In a possible implementation, there are multiple spray assemblies, and the multiple spray assemblies are evenly distributed around the second vertical segment.

[0007] In a possible implementation, the water washing unit further includes an annular member. The annular member is located in the water washing container and is sleeved and fixed on the lower end of the first vertical section.

[0008] In one possible implementation, the water washing unit further includes a liquid outlet pipe and a first switch valve. One end of the liquid outlet pipe is fixedly connected to the water washing container and communicates with the bottom of the water washing container. The first switch valve is provided at the other end of the liquid outlet pipe.

[0009] In one possible implementation, the exhaust gas treatment device in the chlorinated paraffin production process further includes a vent and multiple air inlet pipes. The vent is a circular ring structure with its axis vertically arranged. The vent is sleeved outside the spray container. The vent has an annular cavity arranged around the outside of the spray container. Multiple air inlet pipes are evenly distributed around the axis of the vent, one end of the air inlet pipe is fixedly connected to the vent and communicates with the annular cavity, and the other end is fixedly connected to the spray container and communicates with the inside of the spray container. Among them, the end of the vent pipe used to communicate with the spray container is fixedly connected to the vent and communicates with the annular cavity.

[0010] In a possible implementation, there are two water washing units, each of which further includes a second switch valve disposed on the ventilation pipe.

[0011] In one possible implementation, the exhaust gas treatment device for the chlorinated paraffin production process further includes a first three-way pipe and two third on-off valves. The first three-way pipe is located below the spray container and has a first branch pipe and two second branch pipes. The first branch pipe is fixedly connected to the bottom wall of the spray container and communicates with the interior of the spray container. The two second branch pipes are respectively fixedly connected to the two water washing containers and communicate with the interior of the two water washing containers. The two third on-off valves are respectively provided on the two second branch pipes.

[0012] In one possible implementation, the exhaust gas treatment device for the chlorinated paraffin production process further includes a second three-way pipe and two fourth on-off valves. The second three-way pipe includes a third branch pipe and two fourth branch pipes, each of which is fixedly connected to and communicates with one end of the two water wash pipes located outside the water wash container. The two fourth on-off valves are respectively provided on the two fourth branch pipes.

[0013] In a possible implementation, the tail gas treatment device in the chlorinated paraffin production process further includes a bracket, which is fixedly connected to the spray container, the vent, and the water washing container.

[0014] In the embodiment of the present application, the water washing container is filled with sodium chloride solution and the liquid level overflows the port of the water washing pipe on the first vertical section. The sodium chloride solution is introduced into the liquid inlet pipe and sprayed out through the spray head. The tail gas generated during the production of chlorinated paraffin is introduced into the water washing pipe, and the tail gas flows out through the first vertical section. At this time, the hydrogen chloride in the tail gas reacts with the sodium chloride solution in the water washing container. Subsequently, the tail gas enters the spray container through the vent pipe, and then the hydrogen chloride in the tail gas contacts and reacts with the sodium chloride solution sprayed out by the spray head. Finally, the tail gas flows out from the gas outlet. Since the hydrogen chloride in the tail gas can undergo a dual reaction with the sodium chloride solution in the water washing container and the sodium chloride solution sprayed out by the spray head, the hydrogen chloride in the tail gas can be removed as much as possible, thereby avoiding the problem of poor effect of removing hydrogen chloride in the tail gas by spraying sodium chloride solution on the tail gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic structural diagram of an exhaust gas treatment device in a chlorinated paraffin production process provided by an embodiment of the present utility model;

[0017] Figure 2 A schematic cross-sectional view of an exhaust gas treatment device for a chlorinated paraffin production process according to an embodiment of the present invention;

[0018] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of local A in FIG;

[0019] Figure 4 The present invention provides a schematic cross-sectional structural diagram of the connection of a water washing container, a water washing pipe and an annular member in an exhaust gas treatment device in a chlorinated paraffin production process provided by an embodiment of the present invention.

[0020] In the figure: 1. spray container; 11. air outlet; 2. liquid inlet pipe; 21. second vertical section; 3. spray assembly; 31. spray head; 32. connecting pipe; 41. water washing container; 42. vent pipe; 43. water washing pipe; 431. first vertical section; 44. annular member; 45. liquid outlet pipe; 46. first switch valve; 47. second switch valve; 5. vent member; 51. annular cavity; 6. air inlet pipe; 7. first three-way pipe; 71. first branch pipe; 72. second branch pipe; 8. third switch valve; 9. second three-way pipe; 91. third branch pipe; 92. fourth branch pipe; 10. fourth switch valve; 110. bracket. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] It should be further explained that the drawings and implementation methods of the present invention mainly describe the concept of the present invention. On the basis of this concept, some connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems, etc. The specific forms and settings may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above-mentioned specific forms and settings in a familiar manner.

[0023] When an element is referred to as being “fixed to” or “disposed on” another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] The directions or positional relationships indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, and "several" means one or more, unless otherwise specifically defined.

[0026] Please also refer to Figures 1 to 4The tail gas treatment device for the chlorinated paraffin production process provided by the present invention is now described. The tail gas treatment device for the chlorinated paraffin production process comprises a spray container 1, a liquid inlet pipe 2, a spray assembly 3 and a water washing unit. The top of the spray container 1 is provided with an air outlet 11. The liquid inlet pipe 2 penetrates the side wall of the spray container 1 and is fixedly connected to the spray container 1. The spray assembly 3 is located in the spray container 1, and the spray assembly 3 has a spray head 31 connected to the liquid inlet pipe 2. The water washing unit comprises a water washing container 41, a vent pipe 42 and a water washing pipe 43. The water washing container 41 is located below the spray container 1. One end of the vent pipe 42 is connected to the inside of the spray container 1, and the connection point between the spray container 1 and the vent pipe 42 is located below the spray head 31. The other end of the vent pipe 42 is fixedly connected to the top wall of the water washing container 41 and is connected to the inside of the water washing container 41. The water washing pipe 43 penetrates the side wall of the water washing container 41 and is fixedly connected to the water washing container 41. The water washing pipe 43 has a first vertical section 431 that is vertically arranged and located in the water washing container 41. The port of the water washing pipe 43 on the first vertical section 431 is arranged downward.

[0027] Compared to the prior art, the tail gas treatment device provided by the present invention during the production of chlorinated paraffin comprises a water washing container 41 containing sodium chloride solution, the liquid level of which overflows the port located on the first vertical section 431 of the water washing pipe 43. The sodium chloride solution is introduced into the liquid inlet pipe 2 and sprayed out through the spray head 31. The tail gas generated during the production of chlorinated paraffin is introduced into the water washing pipe 43, and the tail gas flows out through the first vertical section 431. At this time, the hydrogen chloride in the tail gas reacts with the sodium chloride solution in the water washing container 41. The tail gas then enters the spray container 1 through the vent pipe 42. The hydrogen chloride in the tail gas then contacts and reacts with the sodium chloride solution sprayed from the spray head 31, and finally the tail gas flows out through the gas outlet 11. Since the hydrogen chloride in the tail gas can undergo a dual reaction with the sodium chloride solution in the water washing container 41 and the sodium chloride solution sprayed from the spray head 31, the hydrogen chloride in the tail gas can be removed as much as possible, thereby avoiding the problem of poor removal of hydrogen chloride from the tail gas by simply spraying the sodium chloride solution on the tail gas.

[0028] In some embodiments, see Figure 2 and Figure 3 The liquid inlet pipe 2 has a second vertical section 21 located within the spray container 1. The end of the liquid inlet pipe 2 located on the second vertical section 21 is sealed. The spray assembly 3 also includes a connecting pipe 32. One end of the connecting pipe 32 is fixedly connected to the second vertical section 21 and communicates with the interior of the second vertical section 21. The other end of the connecting pipe 32 is downwardly disposed and connected to the spray head 31. The spray head 31 is connected to the interior of the second vertical section 21 and, therefore, to the interior of the liquid inlet pipe 2 through the connecting pipe 32.

[0029] In some embodiments, see Figure 3There are multiple spray assemblies 3, and the multiple spray assemblies 3 are evenly distributed around the second vertical section 21. In this way, the exhaust gas can fully contact with the spray liquid.

[0030] In some embodiments, see Figure 4 The water washing unit further includes an annular member 44. The annular member 44 is located within the water washing container 41 and is sleeved and fixed to the lower end of the first vertical section 431. After the exhaust gas exits the first vertical section 431, the annular member 44 blocks the exhaust gas, allowing it to disperse in all directions before escaping upwards to the liquid surface. This allows the exhaust gas to fully react with the solution within the water washing container 41.

[0031] In some embodiments, see Figure 1 The water washing unit further includes a liquid outlet pipe 45 and a first on-off valve 46. One end of the liquid outlet pipe 45 is fixedly connected to the water washing container 41 and communicates with the bottom of the water washing container 41. The first on-off valve 46 is located at the other end of the liquid outlet pipe 45. When the sodium chloride content in the solution in the water washing container 41 is low, the first on-off valve 46 is opened, allowing the solution in the water washing container 41 to flow out through the liquid outlet pipe 45, thereby replacing the solution in the water washing container 41.

[0032] In some embodiments, see Figure 1 and Figure 2 The exhaust gas treatment device in the chlorinated paraffin production process also includes a vent 5 and multiple air inlet pipes 6. The vent 5 is a circular ring structure with its axis vertically arranged. The vent 5 is mounted outside the spray container 1 and has an annular cavity 51 arranged around the outside of the spray container 1. The multiple air inlet pipes 6 are evenly distributed around the axis of the vent 5. One end of the air inlet pipe 6 is fixedly connected to the vent 5 and communicates with the annular cavity 51, and the other end is fixedly connected to the spray container 1 and communicates with the interior of the spray container 1. The end of the vent pipe 42 for communicating with the spray container 1 is fixedly connected to the vent 5 and communicates with the annular cavity 51. The vent pipe 42 is connected to the interior of the spray container 1 through the annular cavity 51 and the air inlet pipe 6. The exhaust gas enters the annular cavity 51 through the vent pipe 42 and then enters the spray container 1 through the multiple air inlet pipes 6. This allows the exhaust gas to enter the spray container 1 from multiple directions, allowing it to come into uniform contact with the spray liquid.

[0033] In some embodiments, see Figure 2There are two water washing units, each of which further includes a second on-off valve 47. The second on-off valve 47 is disposed on the vent pipe 42. Exhaust gas is introduced into the water washing pipe 43 of one of the water washing units. The second on-off valve 47 in the water washing unit is in an open state, and the exhaust gas enters the spray container 1 through the vent pipe 42 in the water washing unit. When the solution in the water washing container 41 of the water washing unit needs to be replaced, the second on-off valve 47 in the water washing unit is closed, and the second on-off valve 47 in the other water washing unit is switched from closed to open, allowing the exhaust gas to enter the spray container 1 through the vent pipe 42 in the other water washing unit. In this way, exhaust gas treatment can be carried out uninterruptedly.

[0034] In some embodiments, see Figure 2 The tail gas treatment device for the chlorinated paraffin production process also includes a first tee pipe 7 and two third on-off valves 8. The first tee pipe 7 is located below the spray container 1 and has a first branch pipe 71 and two second branch pipes 72. The first branch pipe 71 is fixedly connected to the bottom wall of the spray container 1 and communicates with the interior of the spray container 1. The two second branch pipes 72 are fixedly connected to the two water washing containers 41 and communicate with the interior of the two water washing containers 41. The two third on-off valves 8 are respectively provided on the two second branch pipes 72. When the second on-off valve 47 in one of the water washing units is closed and the first on-off valve 46 is opened, allowing the solution in the water washing container 41 of the water washing unit to flow out, the first on-off valve 46 is closed, and the third on-off valve 8 on the second branch pipe 72 connected to the water washing container 41 of the water washing unit is turned from closed to open. This allows the solution in the spray container 1 to flow into the water washing container 41 along the first branch pipe 71 and the second branch pipe 72. When the liquid level in the water washing container 41 reaches a certain height, the opened third on-off valve 8 is closed. Since a large amount of sodium chloride remains in the solution after the spray liquid in the spray container 1 contacts and reacts with the exhaust gas, it can enter the water washing container 41 and continue to react with the exhaust gas, thereby fully utilizing the sodium chloride solution.

[0035] In some embodiments, see Figure 1 The tail gas treatment device in the chlorinated paraffin production process also includes a second three-way pipe 9 and two fourth switch valves 10. The second three-way pipe 9 includes a third branch pipe 91 and two fourth branch pipes 92. The two fourth branch pipes 92 are respectively fixedly connected to and communicate with one end of the two water washing pipes 43 located outside the water washing container 41. The two fourth switch valves 10 are respectively arranged on the two fourth branch pipes 92. When one of the fourth switch valves 10 is in the closed state, the other fourth switch valve 10 is in the open state, and the tail gas enters the third branch pipe 91, and then follows the fourth branch pipe 92 where the fourth switch valve 10 is located to enter the water washing pipe 43 connected to the fourth branch pipe 92.

[0036] In some embodiments, see Figure 1 The tail gas treatment device in the chlorinated paraffin production process further includes a bracket 110. The bracket 110 is fixedly connected to the spray container 1, the vent 5 and the water washing container 41. In this way, the device can be made into a solid whole.

[0037] The above description is only a preferred embodiment of the present invention and is 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 tail gas treatment device in a chlorinated paraffin production process, characterized in that: include: A spray container having an air outlet on the top; a liquid inlet pipe, penetrating the side wall of the spray container and fixedly connected to the spray container; A spray assembly is located in the spray container, and the spray assembly has a spray head connected to the liquid inlet pipe; as well as The water washing unit includes a water washing container, a vent pipe and a water washing pipe; the water washing container is located below the spray container; one end of the vent pipe is connected to the spray container, and the connection between the spray container and the vent pipe is located below the spray head, and the other end of the vent pipe is fixedly connected to the top wall of the water washing container and connected to the water washing container; the water washing pipe penetrates the side wall of the water washing container and is fixedly connected to the water washing container, the water washing pipe has a first vertical section that is vertically arranged and located in the water washing container, and the port of the water washing pipe located on the first vertical section is arranged downward.

2. The tail gas treatment device in the chlorinated paraffin production process according to claim 1, characterized in that: The liquid inlet pipe has a second vertical section located in the spray container, and the end of the liquid inlet pipe located on the second vertical section is closed. The spray assembly further includes: A connecting pipe has one end fixedly connected to the second vertical section and communicated with the interior of the second vertical section, and the other end is downwardly arranged and connected to the sprinkler head.

3. The tail gas treatment device in the chlorinated paraffin production process according to claim 2, characterized in that: There are multiple spray assemblies, and the multiple spray assemblies are evenly distributed around the second vertical section.

4. The tail gas treatment device in the chlorinated paraffin production process according to claim 1, characterized in that: The water washing unit also includes: The annular member is located in the washing container and is sleeved and fixed on the lower end of the first vertical section.

5. The tail gas treatment device in the chlorinated paraffin production process according to claim 1, characterized in that: The water washing unit also includes: a liquid outlet pipe, one end of which is fixedly connected to the water washing container and communicated with the bottom of the water washing container; The first switch valve is arranged on the other end of the liquid outlet pipe.

6. The tail gas treatment device in the chlorinated paraffin production process according to claim 5, characterized in that: Also includes: The vent is in a circular ring structure with its axis vertically arranged, and the vent is sleeved outside the spray container, and the vent has an annular cavity arranged around the outside of the spray container; A plurality of air inlet pipes are evenly distributed around the axis of the ventilator, one end of the air inlet pipe is fixedly connected to the ventilator and communicates with the annular cavity, and the other end is fixedly connected to the spray container and communicates with the interior of the spray container; Wherein, one end of the vent pipe used for communicating with the spray container is fixedly connected to the vent member and communicated with the annular cavity.

7. The tail gas treatment device in the chlorinated paraffin production process according to claim 6, characterized in that: The number of the water washing units is two, and the water washing unit further comprises: The second switch valve is arranged on the vent pipe.

8. The tail gas treatment device in the chlorinated paraffin production process according to claim 6, further comprising: a first three-way pipe located below the spray container, the first three-way pipe comprising a first branch pipe and two second branch pipes, the first branch pipe being fixedly connected to the bottom wall of the spray container and communicating with the interior of the spray container, and the two second branch pipes being fixedly connected to the two washing containers and communicating with the interiors of the two washing containers, respectively; Two third switch valves are respectively arranged on the two second branch pipes.

9. The tail gas treatment device in the chlorinated paraffin production process according to claim 1, characterized in that: Also includes: A second three-way pipe includes a third branch pipe and two fourth branch pipes, wherein the two fourth branch pipes are respectively fixedly connected to and communicated with one end of the two water washing pipes located outside the water washing container; The two fourth switch valves are respectively arranged on the two fourth branch pipes.

10. The tail gas treatment device in the chlorinated paraffin production process according to claim 6, characterized in that: Also includes: The bracket is fixedly connected to the spray container, the vent and the water washing container.

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