Absorption device for liquid-phase mercury-free synthetic vinyl chloride tail gas

Abstract

The utility model discloses a device for absorbing liquid-phase mercury-free synthetic vinyl chloride tail gas, which comprises a separation component and an alkali washing component, the separation component comprises a jacket cooler, a water inlet pipe, a gas inlet pipe, a water outlet pipe, a lower temperature sensor, an upper temperature sensor, an inner sleeve body, a liquid outlet pipe and a collecting box, a water inlet pipe, a gas inlet pipe and a water outlet pipe are fixedly connected to the circumferential surface of the jacket cooler, and a lower temperature sensor and an upper temperature sensor are fixedly connected to the inner circumferential surface of the jacket cooler. 20-DEG C cooling water is injected into the outside of the jacket cooler, so that the tail gas is separated and recycled, the consumption of a working solution is reduced, then the rest gas is injected into the alkaline washing tower, and hydrogen chloride gas in the tail gas is removed through filtration of a filling layer and spray water, so that the purity of vinyl chloride is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vinyl chloride production, in particular to an absorption device for liquid-phase mercury-free synthetic vinyl chloride tail gas. Background Art

[0002] Vinyl chloride, also known as vinyl chloride, is an organic compound commonly used in the production of polyvinyl chloride resins. It is a colorless liquid with a strong sweet and pungent odor, and is produced industrially by the chlorination of ethylene. Vinyl chloride is volatile at room temperature and can form explosive mixtures in the air. The research on liquid-phase mercury-free synthesis of vinyl chloride aims to replace traditional mercury-containing catalysts to reduce environmental pollution and improve the safety of the production process.

[0003] However, the existing liquid phase synthesis of vinyl chloride process contains vinyl chloride working solution. If the residual hydrogen chloride gas is not separated, it will affect the purity of vinyl chloride and the consumption of working solution. Utility Model Content

[0004] The utility model aims to provide an absorption device for liquid-phase mercury-free synthetic vinyl chloride tail gas, injecting the tail gas into a jacket cooler, injecting 20-degree cooling water into the outside of the jacket cooler to separate and recover the tail gas, thereby reducing the consumption of working fluid, and then injecting the remaining gas into an alkali washing tower, filtering through a filling layer and spraying water to remove hydrogen chloride gas in the tail gas, thereby improving the purity of vinyl chloride.

[0005] In order to achieve the above-mentioned purpose, a device for absorbing liquid-phase mercury-free synthetic vinyl chloride tail gas is provided, comprising: a separation component and an alkali washing component, wherein the separation component comprises a jacket cooler, a water inlet pipe, an air inlet pipe, a water outlet pipe, a lower temperature sensor, an upper temperature sensor, an inner jacket body, a liquid outlet pipe and a collecting box, wherein the water inlet pipe, the air inlet pipe and the water outlet pipe are fixedly connected to the circumferential surface of the jacket cooler, the lower temperature sensor and the upper temperature sensor are fixedly connected to the inner circumferential surface of the jacket cooler, the inner jacket body is fixedly connected to the interior of the jacket cooler, the air inlet pipe penetrates the inner jacket body, and the jacket cooler is fixedly connected to the inner jacket body. The bottom of the cooler is fixedly connected with a liquid outlet pipe, and the bottom of the liquid outlet pipe is fixedly connected with a collecting box; the alkali washing assembly includes an alkali washing tower, an air outlet pipe, a circulating water pump, a lower filling layer, an upper filling layer, an annular water pipe, a spray head and a connecting water pipe, the top of the alkali washing tower is fixedly connected with an air outlet pipe, the circumferential surface of the alkali washing tower is fixedly connected with a circulating water pump, the interior of the alkali washing tower is fixedly connected with a lower filling layer and an upper filling layer, the interior of the alkali washing tower is provided with an annular water pipe, the bottom of the annular water pipe is fixedly connected with a spray head, and the top output end of the circulating water pump is fixedly connected with a connecting water pipe.

[0006] According to the device for absorbing liquid-phase mercury-free synthetic vinyl chloride tail gas, the ratio of the diameter to the height of the jacket cooler is 1:6, the ratio of the diameter to the height of the alkali washing tower is 1:9, the jacket cooler and the alkali washing tower are provided with a connecting pipe, the top of the connecting pipe is fixedly penetrated with the jacket cooler, the bottom of the connecting pipe is fixedly penetrated with the alkali washing tower, and is located below the lower filling layer. The connecting pipe facilitates the tail gas to continue to enter the alkali washing tower.

[0007] According to the device for absorbing liquid-phase mercury-free synthetic vinyl chloride tail gas, the thickness of the upper filling layer is 1000 mm, and the thickness of the lower filling layer is 900 mm, which is used to remove hydrogen chloride gas in the tail gas.

[0008] According to the device for absorbing tail gas of liquid-phase mercury-free synthetic vinyl chloride, the lower temperature sensor is located above the water inlet pipe, and the upper temperature sensor is located below the water outlet pipe, for monitoring the water temperature of the water inlet pipe and the water outlet pipe, so that the water temperature difference at both ends is maintained within 5 degrees, so that the residual working liquid can be fully separated from the tail gas.

[0009] According to the device for absorbing tail gas of liquid-phase mercury-free synthetic vinyl chloride, the number of the spray heads is multiple and evenly distributed on the annular water pipe, and is used for spraying water to remove hydrogen chloride gas in the tail gas.

[0010] According to the device for absorbing liquid-phase mercury-free synthetic vinyl chloride tail gas, the number of the annular water pipes is two, and they are respectively located above the upper filling layer and the lower filling layer, and the annular water pipe is fixedly connected to the circulating water pump through a connecting water pipe. The bottom of the alkali washing tower is filled with water, and the circulating water pump draws the bottom water and sprays it through the spray head, so that the hydrogen chloride gas in the tail gas is dissolved in the water to achieve the purpose of removal.

[0011] According to the device for absorbing liquid-phase mercury-free synthetic vinyl chloride tail gas, the air inlet pipe is located above the water inlet pipe, and the air inlet pipe and the water outlet pipe are relatively arranged on the left and right sides of the jacket cooler.

[0012] According to the device for absorbing liquid-phase mercury-free synthetic vinyl chloride tail gas, the connecting water pipe is fixedly connected to the alkali washing tower, and the input end of the circulating water pump is connected to the alkali washing tower through.

[0013] Compared with the prior art, the utility model has the following beneficial effects: by arranging a separation component, an alkali washing component and a connecting pipe, the tail gas is injected into a jacket cooler, and by injecting 20-degree cooling water into the outside of the jacket cooler, the tail gas is separated and recovered, thereby reducing the consumption of the working fluid, and then the remaining gas is injected into an alkali washing tower, and the hydrogen chloride gas in the tail gas is removed after being filtered through a filling layer and spray water, thereby improving the purity of vinyl chloride.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 This is a front view of a device for absorbing liquid-phase mercury-free synthetic vinyl chloride tail gas according to the utility model;

[0017] Figure 2 This is a cross-sectional view of a separation component of a device for absorbing liquid-phase mercury-free synthetic vinyl chloride tail gas according to the utility model;

[0018] Figure 3 It is a cross-sectional view of an alkali washing component of an absorption device for liquid-phase mercury-free synthetic vinyl chloride tail gas according to the utility model;

[0019] Figure 4 It is a front view of a device for absorbing liquid-phase mercury-free synthetic vinyl chloride tail gas according to the utility model.

[0020] In the figure: 1, separation component; 2, alkali cleaning component; 3, connecting pipe; 101, jacket cooler; 102, water inlet pipe; 103, air inlet pipe; 104, water outlet pipe; 105, lower temperature sensor; 106, upper temperature sensor; 107, inner jacket; 108, liquid outlet pipe; 109, collecting box; 201, alkali cleaning tower; 202, air outlet pipe; 203, circulating water pump; 204, lower filling layer; 205, upper filling layer; 206, annular water pipe; 207, sprinkler head; 208, connecting water pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4The utility model provides a technical solution: an absorption device for liquid-phase mercury-free synthetic vinyl chloride tail gas, comprising: a separation component 1 and an alkali washing component 2, the separation component 1 comprises a jacket cooler 101, a water inlet pipe 102, an air inlet pipe 103, a water outlet pipe 104, a lower temperature sensor 105, an upper temperature sensor 106, an inner sleeve 107, a liquid outlet pipe 108 and a collecting box 109, the water inlet pipe 102, the air inlet pipe 103 and the water outlet pipe 104 are fixedly connected on the circumferential surface of the jacket cooler 101, the air inlet pipe 103 is located above the water inlet pipe 102, the air inlet pipe 103 and the water outlet pipe 104 are relatively arranged on the left and right sides of the jacket cooler 101, and the jacket cooler A lower temperature sensor 105 and an upper temperature sensor 106 are fixedly connected to the inner circumferential surface of the cooler 101. The lower temperature sensor 105 is located above the water inlet pipe 102, and the upper temperature sensor 106 is located below the water outlet pipe 104, and is used to monitor the water temperature of the water inlet pipe 102 and the water outlet pipe 104, so that the water temperature difference at both ends is maintained within 5 degrees, so that the residual working fluid can be fully separated from the exhaust gas. An inner sleeve body 107 is fixedly connected to the inside of the jacket cooler 101, and the air inlet pipe 103 and the inner sleeve body 107 pass through. A liquid outlet pipe 108 is fixedly connected to the bottom of the jacket cooler 101, and a collecting box 109 is fixedly connected to the bottom of the liquid outlet pipe 108 for recovering the working fluid.

[0023] The alkali washing assembly 2 includes an alkali washing tower 201, an air outlet pipe 202, a circulating water pump 203, a lower filling layer 204, an upper filling layer 205, an annular water pipe 206, a spray head 207 and a connecting water pipe 208. The top of the alkali washing tower 201 is fixedly connected with the air outlet pipe 202, the circumferential surface of the alkali washing tower 201 is fixedly connected with the circulating water pump 203, and the interior of the alkali washing tower 201 is fixedly connected with the lower filling layer 204 and the upper filling layer 205. The thickness of the upper filling layer 205 is 1000mm, and the thickness of the lower filling layer 204 is 900mm, which is used to filter the tail gas and remove the hydrogen chloride gas. The alkali washing tower 201 is provided with an annular water pipe 206, two of which are respectively located above the upper filling layer 205 and the lower filling layer 204, the annular water pipe 206 is fixedly connected to the circulating water pump 203 through a connecting water pipe 208, a spray head 207 is fixedly connected to the bottom of the annular water pipe 206, a plurality of spray heads 207 are provided and are evenly distributed on the annular water pipe 206 for spraying water to remove hydrogen chloride gas in the tail gas, and a connecting water pipe 208 is fixedly connected to the top output end of the circulating water pump 203.

[0024] The ratio of the diameter to the height of the jacket cooler 101 is 1:6, and the ratio of the diameter to the height of the alkali washing tower 201 is 1:9. The jacket cooler 101 and the alkali washing tower 201 are provided with a connecting pipe 3, the top of the connecting pipe 3 is fixedly penetrated through the jacket cooler 101, the bottom of the connecting pipe 3 is fixedly penetrated through the alkali washing tower 201, and is located below the lower filling layer 204. The connecting water pipe 208 is fixedly connected to the alkali washing tower 201, and the input end of the circulating water pump 203 is connectedly penetrated through the alkali washing tower 201. The bottom of the alkali washing tower 201 is filled with water, and the circulating water pump 203 draws the bottom water and sprays it through the spray head 207, so that the hydrogen chloride gas in the tail gas is dissolved in the water to achieve the purpose of removal.

[0025] Working principle: exhaust gas is injected into the inner casing 107 from the air inlet pipe 103, and 20-degree cooling water is injected into the water inlet pipe 102. The cooling water cools the inner casing 107 and is discharged from the water outlet pipe 104. The lower temperature sensor 105 and the upper temperature sensor 106 monitor the water temperature of the water inlet pipe 102 and the water outlet pipe 104, so that the water temperature difference at both ends is maintained within 5 degrees, so that the residual working fluid can be fully separated from the exhaust gas. The remaining exhaust gas enters the alkali washing tower 201 from the connecting pipe 3, and the circulating water pump 203 is started to extract the bottom water and spray it through the spray head 207, so that the hydrogen chloride gas in the exhaust gas is dissolved in the water to achieve the purpose of removal. The lower filling layer 204 and the upper filling layer 205 also filter the exhaust gas to remove the hydrogen chloride gas. The filtered exhaust gas is discharged from the outlet pipe 202 and collected.

[0026] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An absorption device for liquid phase mercury-free synthetic vinyl chloride tail gas, characterized in that: include: A separation component (1) and an alkali washing component (2), wherein the separation component (1) comprises a jacket cooler (101), a water inlet pipe (102), an air inlet pipe (103), a water outlet pipe (104), a lower temperature sensor (105), an upper temperature sensor (106), an inner jacket (107), a liquid outlet pipe (108) and a collecting box (109); the water inlet pipe (102), the air inlet pipe (103) and the water outlet pipe (104) are fixedly connected on the circumferential surface of the jacket cooler (101); the lower temperature sensor (105) and the upper temperature sensor (106) are fixedly connected on the inner circumferential surface of the jacket cooler (101); the inner jacket (107) is fixedly connected inside the jacket cooler (101); the air inlet pipe (103) penetrates the inner jacket (107); the liquid outlet pipe (108) is fixedly connected at the bottom of the jacket cooler (101); The bottom of the liquid outlet pipe (108) is fixedly connected to a collecting box (109); the alkali washing assembly (2) comprises an alkali washing tower (201), an air outlet pipe (202), a circulating water pump (203), a lower filling layer (204), an upper filling layer (205), an annular water pipe (206), a spray head (207) and a connecting water pipe (208); the top of the alkali washing tower (201) is fixedly connected to the air outlet pipe (202); the circumferential surface of the alkali washing tower (201) is fixedly connected to the circulating water pump (203); the interior of the alkali washing tower (201) is fixedly connected to the lower filling layer (204) and the upper filling layer (205); an annular water pipe (206) is arranged inside the alkali washing tower (201); the bottom of the annular water pipe (206) is fixedly connected to the spray head (207); and the top output end of the circulating water pump (203) is fixedly connected to the connecting water pipe (208).

2. The device for absorbing liquid phase mercury-free synthetic vinyl chloride tail gas as claimed in claim 1, characterized in that: The air inlet pipe (103) is located above the water inlet pipe (102), and the air inlet pipe (103) and the water outlet pipe (104) are arranged on the left and right sides of the jacket cooler (101) relative to each other.

3. The device for absorbing liquid phase mercury-free synthetic vinyl chloride tail gas as claimed in claim 1, characterized in that: The lower temperature sensor (105) is located above the water inlet pipe (102), and the upper temperature sensor (106) is located below the water outlet pipe (104).

4. The device for absorbing liquid phase mercury-free synthetic vinyl chloride tail gas as claimed in claim 1, characterized in that: The ratio of the diameter to the height of the jacket cooler (101) is 1:6, and the ratio of the diameter to the height of the alkali washing tower (201) is 1:

9. The jacket cooler (101) and the alkali washing tower (201) are provided with a connecting pipe (3), the top of the connecting pipe (3) is fixedly penetrated by the jacket cooler (101), and the bottom of the connecting pipe (3) is fixedly penetrated by the alkali washing tower (201) and is located below the lower filling layer (204).

5. The device for absorbing liquid phase mercury-free synthetic vinyl chloride tail gas as claimed in claim 1, characterized in that: The thickness of the upper filling layer (205) is 1000 mm, and the thickness of the lower filling layer (204) is 900 mm.

6. The device for absorbing liquid-phase mercury-free synthetic vinyl chloride tail gas as claimed in claim 1, characterized in that: The annular water pipes (206) are provided in two numbers and are respectively located above the upper filling layer (205) and the lower filling layer (204). The annular water pipes (206) are fixedly connected to the circulating water pump (203) via a connecting water pipe (208).

7. The device for absorbing liquid phase mercury-free synthetic vinyl chloride tail gas as claimed in claim 1, characterized in that: The number of the spray heads (207) is multiple and evenly distributed on the annular water pipe (206).

8. The device for absorbing liquid-phase mercury-free synthetic vinyl chloride tail gas as claimed in claim 1, characterized in that: The connecting water pipe (208) is fixedly connected to the alkali washing tower (201), and the input end of the circulating water pump (203) is connected through the alkali washing tower (201).

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