Chlorinated hydrochloric acid refining device

Abstract

The utility model relates to a refining device of chlorinated hydrochloric acid, which comprises an adsorption assembly, a desorption assembly and a resin adsorption structure, the adsorption assembly and the desorption assembly are connected through the resin adsorption structure, and the resin adsorption structure comprises at least three resin towers which are connected with each other and contain NDA type acid-resistant adsorption resin, and selectively allows nitrogen or steam to enter; the adsorption assembly comprises a raw acid tank for the by-product hydrochloric acid to enter, an adsorption pump for guiding the by-product hydrochloric acid into two resin towers which are connected in series, a trap for blocking resin and a finished product tank for storing refined hydrochloric acid which are connected in sequence; the desorption assembly comprises a cooling assembly, a separation tank, a solvent tank and a wastewater tank; the cooling assembly is sequentially connected with the other resin tower and is used for cooling the organic matter steam into a mixed solution; the separation tank is used for separating acid wastewater and an organic solvent from the mixed solution; the solvent tank is used for storing the organic solvent; the utility model aims to solve the problem that the existing byproduct hydrochloric acid is difficult to treat or the treatment cost is high.

Description

Technical Field

[0001] The utility model relates to the technical field of refining devices, and particularly relates to a refining device for chlorinated hydrochloric acid. Background Art

[0002] Chlorinated toluene (o-chlorotoluene, p-chlorotoluene) is an important organic synthesis raw material, which is widely used in the production of dyes, pesticides, pharmaceuticals and other products.

[0003] The production of chlorinated toluene generally adopts the method of Lewis acid catalysis and liquid-phase chlorination of toluene, and the product is obtained through processes such as benzene dehydration, chlorination, water washing, alkali washing, and rectification. During the production process of o-chlorotoluene, a large amount of hydrogen chloride tail gas is generated. After being absorbed by water, about 1.0 m3 of by-product hydrochloric acid is produced per 1.0 ton of product. Since this part of by-product hydrochloric acid contains a certain concentration of benzene organic matter and has a yellowish color, the quality of hydrochloric acid is relatively low, which seriously affects the use and sales of by-product hydrochloric acid products, causes waste of resources, and also leads to the transfer of pollutants, restricting the sustainable development of enterprises. For by-product hydrochloric acid with high hydrochloric acid concentration and high organic pollutant concentration, conventional processes can hardly handle it. Generally, the adsorption method is selected to treat such by-product hydrochloric acid. The activated carbon adsorption technology has good treatment effect, but has disadvantages such as difficult regeneration, poor environment for adsorbent replacement, and high operation cost. Content of the Utility Model

[0004] Based on the above description, the utility model provides a refining device for chlorinated hydrochloric acid to solve the problem that the existing by-product hydrochloric acid is difficult to treat or has a high treatment cost.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A refining device for chlorinated hydrochloric acid includes an adsorption component, a desorption component, and a resin adsorption structure. The adsorption component and the desorption component are connected through the resin adsorption structure. The resin adsorption structure includes at least three resin towers connected to each other. Each resin tower contains NDA type acid-resistant adsorption resin and is selectively supplied with nitrogen or steam.

[0007] Among them, the adsorption component includes a raw acid tank for supplying by-product hydrochloric acid, an adsorption pump for introducing the by-product hydrochloric acid into two of the series-connected resin towers, a trap for blocking resin, and a finished product tank for storing refined hydrochloric acid. The desorption component includes another resin tower connected in sequence, a cooling component for cooling the organic matter steam passing through another resin tower to a mixed liquid, a separation tank for separating the mixed liquid into acid wastewater and organic solvent, a solvent tank for storing the organic solvent, and a wastewater tank for storing the acid wastewater.

[0008] On the basis of the above technical solutions, the present utility model can also be improved as follows:

[0009] Further, the resin adsorption structure further includes at least nine connecting pipes, and the nine connecting pipes are divided into three first connecting pipes, three second connecting pipes and three third connecting pipes. Each of the first connecting pipes and each of the second connecting pipes are respectively connected to the upper and lower ends of each resin tower; the three third connecting pipes are respectively connected to the first connecting pipe and the second connecting pipe of any two of the resin towers, and each of the third connecting pipes is provided with a cut-off valve;

[0010] The refined device for chlorinated hydrochloric acid further includes:

[0011] A total water inlet pipe, located above the three resin towers, and the total water inlet pipe is connected to the raw acid tank;

[0012] A total water outlet pipe, located below the three resin towers, and both ends thereof are respectively connected to the raw acid tank and the trap;

[0013] At least three water inlet branch pipes, one ends of the three water inlet branch pipes are all connected to the total water inlet pipe, and the other ends are respectively connected to the three first connecting pipes in one-to-one correspondence. Each of the water inlet branch pipes is provided with a water inlet valve; and,

[0014] At least three water outlet branch pipes, one ends of the three water outlet branch pipes are connected to the total water outlet pipe, and the other ends are respectively connected to the three second connecting pipes in one-to-one correspondence. Each of the water outlet branch pipes is provided with a water outlet valve.

[0015] Further, the refined device for chlorinated hydrochloric acid further includes:

[0016] A total air inlet pipe, located above the three resin towers, and one end thereof is used for steam to enter, and the other end is used for nitrogen to enter;

[0017] A total air outlet pipe, located below the three resin towers, and both ends thereof are respectively connected to the raw acid tank and the finished product tank, and the middle part of the total air outlet pipe is connected to the cooling assembly;

[0018] At least three air inlet branch pipes, both ends of each air inlet branch pipe are respectively connected to the air inlet branch pipe and each first connecting pipe, and each air inlet branch pipe is provided with an air inlet valve; and,

[0019] At least three air outlet branch pipes, both ends of each air outlet branch pipe are respectively connected to the total air outlet pipe and the lower ends of each second connecting pipe, and each air outlet branch pipe is provided with an air outlet valve.

[0020] Further, the refined device for chlorinated hydrochloric acid further includes a flow meter, and the flow meter is arranged between the adsorption pump and the resin adsorption structure and is close to the resin adsorption structure.

[0021] Further, the adsorption assembly further includes a fine filter, and the fine filter is respectively connected to the raw acid tank and the resin adsorption structure.

[0022] Further, the cooling assembly includes a condenser and a cooler connected to each other. The condenser is connected to the resin adsorption structure, and the cooler is connected to the separation tank.

[0023] Further, the refined device for chlorinated hydrochloric acid further includes a finished product pump, and the finished product pump is respectively connected to the finished product tank and the resin adsorption structure.

[0024] Further, the desorption assembly further includes a waste water pump connected to the waste water tank and a solvent pump connected to the solvent tank.

[0025] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0026] The by-product hydrochloric acid enters the raw acid tank for oil separation, and then is introduced into two series-connected resin towers through the adsorption pump. The two resin towers adsorb and enrich the organic matters dissolved in the by-product hydrochloric acid to obtain refined hydrochloric acid, and the refined hydrochloric acid is then stored in the finished product tank. And the trap is used to intercept resin or other mechanical impurities from entering the finished product tank. The adsorption-saturated resin can restore its adsorption performance through steam, with high adsorption efficiency, no introduction of new pollutants, and no secondary pollution.

[0027] First, nitrogen is filled into another resin tower, and the residual hydrochloric acid in another resin tower is pressed back into the raw acid tank. Then, steam is filled. The steam passes through the resin tower, so that the organic matters adsorbed in the resin are desorbed from the resin to obtain organic matter steam. The organic matter steam passes through the cooling assembly to obtain a mixed solution of hydrochloric acid and organic solvent. The mixed solution enters the separator and is automatically stratified to obtain acid waste water and organic solvent. The organic solvent enters the solvent tank for collection, and the acid waste water enters the waste water tank for collection. By switching the adsorption of organic matters in the by-product hydrochloric acid by two of the resin towers and the desorption of organic matters of the resin by one resin tower, the continuous operation of the entire adsorption process of the by-product hydrochloric acid is maintained, and the content of organic matters such as toluene and chlorotoluene in the refined hydrochloric acid is controlled to be lower than 5.0 mg / L. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of a refined device for chlorinated hydrochloric acid provided by an embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of the operation process of a refined device for chlorinated hydrochloric acid provided by an embodiment of the present invention.

[0030] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0031] 1. Adsorption assembly; 11. Raw acid tank; 12. Adsorption pump; 13. Trapper; 14. Product tank; 15. Fine filter; 2. Desorption assembly; 21. Cooling assembly; 211. Condenser; 212. Cooler; 22. Separation tank; 23. Solvent tank; 24. Wastewater tank; 3. Resin adsorption structure; 31. Resin tower; 311. First resin tower; 312. Second resin tower; 313. Third resin tower; 32. Connecting pipe; 321. First connecting pipe; 322. Second connecting pipe; 323. Third connecting pipe; 3231. Cut-off valve; 41. Inlet main pipe; 42. Outlet main pipe; 43. Inlet branch pipe; 431. Inlet valve; 44. Outlet branch pipe; 441. Outlet valve; 51. Inlet gas main pipe; 52. Outlet gas main pipe; 53. Inlet gas branch pipe; 531. Inlet gas valve; 54. Outlet gas branch pipe; 541. Outlet gas valve; 6. Flowmeter; 7. Product pump; 8. Wastewater pump; 9. Solvent pump. Detailed implementation manners

[0032] For the convenience of understanding the present application, the present application will be described more comprehensively below with reference to the relevant attached drawings. Embodiments of the present application are shown in the attached drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of the present application in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0034] It can be understood that spatial relationship terms such as "under", "below", "lower", "beneath", "above", "upper", etc. can be used herein to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that in addition to the orientation shown in the figure, spatial relationship terms also include different orientations of the device during use and operation. For example, if the device in the attached drawing is flipped, the element or feature described as "under other elements" or "beneath it" or "under it" will be oriented "above" other elements or features. Therefore, the exemplary terms "under" and "below" can include both the upper and lower orientations. In addition, the device can also include other orientations (such as rotating 90 degrees or other orientations), and the spatial description terms used herein are accordingly interpreted.

[0035] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediate element. In the following embodiments, "connection", if there is a transfer of electrical signals or data between the connected circuits, modules, units, etc., should be understood as "electrical connection", "communication connection", etc.

[0036] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprises / include" or "has" etc. specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0037] Please refer to Figure 1 and Figure 2 , the present utility model provides a refining device for hydrochloric acid chloride, including an adsorption assembly 1, a desorption assembly 2 and a resin adsorption structure 3. The adsorption assembly 1 and the desorption assembly 2 are connected through the resin adsorption structure 3. The resin adsorption structure 3 includes at least three resin towers 31 connected to each other. Each of the resin towers 31 contains an NDA type acid-resistant adsorption resin and is selectively supplied with nitrogen or steam. Among them, the adsorption assembly 1 includes a raw acid tank 11 for supplying by-product hydrochloric acid, an adsorption pump 12 for introducing the by-product hydrochloric acid into two of the serially connected resin towers 31, a trap 13 for blocking the resin, and a finished product tank 14 for storing refined hydrochloric acid. The desorption assembly 2 includes another resin tower 31 connected in sequence, a cooling assembly 21 for cooling the organic matter steam passing through the other resin tower 31 to a mixed liquid, a separation tank 22 for separating the mixed liquid into acid wastewater and organic solvent, a solvent tank 23 for storing the organic solvent, and a wastewater tank 24 for storing the acid wastewater.

[0038] The by-product hydrochloric acid enters the raw acid tank 11 for oil separation, and then is introduced into two of the serially connected resin towers 31 through the adsorption pump 12. The two resin towers 31 adsorb and enrich the organic matter dissolved in the by-product hydrochloric acid to obtain refined hydrochloric acid, and the refined hydrochloric acid is then stored in the finished product tank 14. And the trap 13 is used to intercept the resin or other mechanical impurities from entering the finished product tank 14. The adsorption-saturated resin can restore its adsorption performance through steam, with high adsorption efficiency, no introduction of new pollutants, and no secondary pollution.

[0039] Nitrogen is first filled into another resin tower 31, and the residual hydrochloric acid in the other resin tower 31 is pressed back into the original acid tank 11. Then, steam is filled. The steam passes through the resin tower 31, so that the organic matter adsorbed in the resin is desorbed from the resin to obtain organic matter steam. The organic matter steam passes through the cooling assembly 21 to obtain a mixed solution of hydrochloric acid and organic solvent. The mixed solution enters the separator and is automatically stratified to obtain acid wastewater and organic solvent. The organic solvent enters the solvent tank 23 for collection, and the acid wastewater enters the wastewater tank 24 for collection. By switching the adsorption of organic matter in the by-product hydrochloric acid by two of the resin towers 31 and the desorption of organic matter from the resin by one of the resin towers 31, the continuous operation of the entire adsorption process of the by-product hydrochloric acid is maintained, and the content of organic matters such as toluene and chlorotoluene in the refined hydrochloric acid is controlled to be lower than 5.0 mg / L.

[0040] It should be noted that the NDA type acid-resistant adsorption resin is a high molecular polymer with a three-dimensional network structure, having a relatively high specific surface area and excellent pore structure, and capable of adsorbing organic matters such as benzene and chlorobenzene in the by-product hydrochloric acid to the resin surface through the van der Waals force between molecules. The NDA type acid-resistant adsorption resin has the performance of selectively adsorbing benzene series organic matters, with high adsorption efficiency and easy regeneration. No new pollutants are introduced during the whole process of refining and treating the by-product hydrochloric acid, and no secondary pollution is generated. The acidity of the refined hydrochloric acid obtained after adsorption remains basically unchanged. It can be sold externally for treatment to realize resource recovery and utilization. The NDA type resin has strong acid and alkali resistance, high mechanical strength, good heat resistance, and long service life.

[0041] In this embodiment, the three resin towers 31 are divided into a first resin tower 311, a second resin tower 312, and a third resin tower 313.

[0042] Specifically, the resin adsorption structure 3 further includes at least nine connecting pipes 32. The nine connecting pipes 32 are divided into three first connecting pipes 321, three second connecting pipes 322, and three third connecting pipes 323. Each of the first connecting pipes 321 and each of the second connecting pipes 322 are respectively connected to the upper and lower ends of each resin tower 31; the three third connecting pipes 323 are respectively connected to the first connecting pipe 321 and the second connecting pipe 322 of any two resin towers 31, and a cut-off valve 3231 is provided on each of the third connecting pipes 323. In this embodiment, the two ends of the three third connecting pipes 323 are respectively connected to the second connecting pipe 322 of the first resin tower 311 and the first connecting pipe 321 of the second resin tower 312, the second connecting pipe 322 of the second resin tower 312 and the first connecting pipe 321 of the third resin tower 313, and the second connecting pipe 322 of the third resin tower 313 and the first connecting pipe 321 of the first resin tower 311, so that by selectively opening different cut-off valves 3231, the corresponding two resin towers 31 are connected in series.

[0043] In addition, the refining device for hydrochloric acid chloride further includes: a main inlet pipe 41, a main outlet pipe 42, at least three inlet branch pipes 43 and at least three outlet branch pipes 44. The main inlet pipe 41 is located above the three resin towers 31, and the main inlet pipe 41 is connected to the raw acid tank 11. The main outlet pipe 42 is located below the three resin towers 31, and both ends thereof are respectively connected to the raw acid tank 11 and the trap 13. One ends of the three inlet branch pipes 43 are all connected to the main inlet pipe 41, and the other ends are respectively connected to the three first connecting pipes 321 in one-to-one correspondence. Each inlet branch pipe 43 is provided with an inlet valve 431. One ends of the three outlet branch pipes 44 are connected to the main outlet pipe 42, and the other ends are respectively connected to the three second connecting pipes 322 in one-to-one correspondence. Each outlet branch pipe 44 is provided with an outlet valve 441.

[0044] In this embodiment, the three inlet branch pipes 43 are divided into a first inlet branch pipe, a second inlet branch pipe, and a third inlet branch pipe corresponding to the first resin tower 311, the second resin tower 312, and the third resin tower 313 respectively. The three outlet branch pipes 44 are divided into a first outlet branch pipe, a second outlet branch pipe, and a third outlet branch pipe corresponding to the first resin tower 311, the second resin tower 312, and the third resin tower 313 respectively.

[0045] Taking the series adsorption of the first resin tower 311 and the second resin tower 312 and the desorption of the third resin tower 313 as an example. Open the inlet valve 431 of the first inlet branch pipe, the cut-off valve 3231 of the third connecting pipe 323 connecting the first resin tower 311 and the second resin tower 312, and the outlet valve 441 of the second outlet branch pipe, so that the by-product hydrochloric acid is sequentially introduced from the raw acid tank 11 into the first resin tower 311 and the second resin tower 312 to obtain refined hydrochloric acid and then enter the finished product tank 14 through the trap 13.

[0046] More specifically, the refining device for the hydrochloric acid chloride further includes an intake main pipe 51, an exhaust main pipe 52, at least three intake branch pipes 53, and at least three exhaust branch pipes 54. The exhaust main pipe 52 is located above the three resin towers 31, and one end thereof is for steam to enter, and the other end is for nitrogen to enter; the exhaust main pipe 52 is located below the three resin towers 31, and both ends thereof are respectively connected to the raw acid tank 11 and the finished product tank 14, and the middle part of the exhaust main pipe 52 is connected to the cooling assembly 21; both ends of each intake branch pipe 53 are respectively connected to the intake branch pipe 53 and each first connecting pipe 321, and each intake branch pipe 53 is provided with an intake valve 531; both ends of each exhaust branch pipe 54 are respectively connected to the exhaust main pipe 52 and the lower ends of each second connecting pipe 322, and each exhaust branch pipe 54 is provided with an exhaust valve 541.

[0047] In this embodiment, the three intake branch pipes 53 are divided into a first intake branch pipe, a second intake branch pipe, and a third intake branch pipe corresponding to the first resin tower 311, the second resin tower 312, and the third resin tower 313 respectively, and the three exhaust branch pipes 54 are divided into a first exhaust branch pipe, a second exhaust branch pipe, and a third exhaust branch pipe corresponding to the first resin tower 311, the second resin tower 312, and the third resin tower 313 respectively. Open the intake valve 531 of the third intake branch pipe and the exhaust valve 541 of the third exhaust branch pipe, nitrogen enters the third resin tower 313, and the residual hydrochloric acid in the third resin tower 313 is pressed out to the exhaust main pipe 52, and then flows from the exhaust main pipe 52 into the raw acid tank 11. Then stop filling nitrogen, and fill steam into the intake main pipe 51. The steam pressure is stabilized at 0.3 - 0.4 MPa, and the steam purges the third resin tower 313 at a high temperature so that the organic matter adsorbed in the resin is desorbed from the resin. The desorbed organic matter steam becomes a mixed liquid after passing through the cooling assembly 21.

[0048] It should be noted that two intake cut-off valves are respectively provided at both ends of the intake main pipe 51 for steam and nitrogen to enter the gum tower respectively. Exhaust cut-off valves are provided at both ends and the middle part of the exhaust main pipe 52.

[0049] In this embodiment, the refining device for the hydrochloric acid chloride further includes a flow meter 6, and the flow meter 6 is arranged between the adsorption pump 12 and the resin adsorption structure 3 and is close to the resin adsorption structure 3. The refining device for the hydrochloric acid chloride further includes a controller, and the controller is electrically connected to the flow meter 6 and the adsorption pump 12 to control the adsorption flow rate to be about 7.5 m 3 / h.

[0050] In this embodiment, the adsorption assembly 1 further includes a fine filter 15, and the fine filter 15 is respectively connected to the raw acid tank 11 and the resin adsorption structure 3. Thus, the by-product hydrochloric acid after oil separation from the raw acid tank 11 enters the resin tower 31 after passing through the fine filter 15.

[0051] In this embodiment, the cooling assembly 21 includes a condenser 211 and a cooler 212 which are connected. The condenser 211 is connected to the resin adsorption structure 3, and the cooler 212 is connected to the separation tank 22. The condenser 211 liquefies the organic vapor into a high-temperature mixed liquid, and the cooler 212 is used to cool down the high-temperature mixed liquid. In addition, after the desorption of the third resin tower 313 is completed, nitrogen is used to purge the resin in the third resin tower 313 to cool it down, and the hot gas blown out is cooled by the condenser 211 and then discharged to the tail gas main pipe.

[0052] Further, in this embodiment, the refining device for chlorinated hydrochloric acid further includes a finished product pump 7, and the finished product pump 7 is respectively connected to the finished product tank 14 and the resin adsorption structure 3. The finished product pump 7 is used to discharge the refined hydrochloric acid in the finished product tank 14 for recycling, keep the refined hydrochloric acid in the finished product pipe within a set liquid level range, and can also pump the refined hydrochloric acid into the resin tower 31 after desorption through the finished product pump 7 to play a role in moisturizing.

[0053] In this embodiment, the desorption assembly 2 further includes a waste water pump 8 connected to the waste water tank 24 and a solvent pump 9 connected to the separation tank 22. The waste water pump 8 is used to send the acid waste water, that is, dilute hydrochloric acid, in the waste water pump 8 for production reuse to replace part of the water for absorbing hydrogen chloride to produce by-product hydrochloric acid. The solvent pump 9 is regularly sent out of the device for recovery.

[0054] It should be noted that in the present utility model, the number of the raw acid tank 11, the adsorption pump 12, the fine filter 15, and the waste water pump 8 is not limited. In this embodiment, they are all set to two. Among them, the two raw acid tanks 11 are arranged in series, and the rest are arranged in parallel to play a role of standby.

[0055] In summary, the first resin tower 311 and the second resin tower 312 adsorb, and the third resin tower 313 desorbs. The by-product hydrochloric acid sequentially enters the two original acid tanks 11, and then through the adsorption pump 12. The by-product hydrochloric acid in the original acid tank 11 sequentially flows through the fine filter 15, the first resin tower 311 and the second resin tower 312 to obtain refined hydrochloric acid. The refined hydrochloric acid then flows through the trap 13 and into the finished product pipe. At the same time, nitrogen is filled into the third resin tower 313 so that the remaining solution in the third resin tower 313 is pressed into the original acid pipe, and then steam is filled for purging so that the steam takes away the organic matter of the resin to become organic vapor. The organic vapor flows through the condenser 211 and the cooler 212 to obtain a mixed liquid. The mixed liquid enters the separation tank 22 and is separated into acid wastewater and organic solvent, and then enters the wastewater tank 24 and the solvent tank 23 respectively, and is recycled through the wastewater pump 8 and the organic solvent respectively; then nitrogen is filled into the third resin tower 313 again for purging so that the resin in the third resin tower 313 cools down. The hot air blown out is cooled by the condenser 211 and then discharged to the tail gas main pipe for subsequent tail gas treatment. Finally, after the cooling is completed, the refined hydrochloric acid is pumped into the third resin tower 313 through the finished product pump 7. Such is a cycle period.

[0056] Thus, after the cumulative amount of by-product hydrochloric acid processed in a cycle period reaches the setting, the second resin tower 312 and the third resin tower 313 are switched to be in series for adsorption, and the first resin tower 311 desorbs; then the third resin tower 313 and the first resin tower 311 are in series, and the second resin tower 312 desorbs. In this way, the cycle is repeated to ensure the continuous operation of the entire adsorption process.

[0057] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A refining device for hydrochloric acid chloride, characterized in that, It includes an adsorption component, a desorption component and a resin adsorption structure. The adsorption component and the desorption component are connected through the resin adsorption structure. The resin adsorption structure includes at least three resin towers connected to each other. Each resin tower contains NDA type acid-resistant adsorption resin and is selectively supplied with nitrogen or steam. Among them, the adsorption component includes a raw acid tank for supplying by-product hydrochloric acid, an adsorption pump for introducing the by-product hydrochloric acid into two of the serially connected resin towers, a trap for blocking the resin, and a finished product tank for storing refined hydrochloric acid, which are connected in sequence. The desorption component includes another resin tower connected in sequence, a cooling component for cooling the organic vapor passing through another resin tower to a mixed liquid, a separation tank for separating the mixed liquid into acid wastewater and organic solvent, a solvent tank for storing the organic solvent, and a wastewater tank for storing the acid wastewater.

2. The refining device for hydrochloric acid chloride according to claim 1, characterized in that, The resin adsorption structure further includes at least nine connecting pipes. The nine connecting pipes are divided into three first connecting pipes, three second connecting pipes and three third connecting pipes. Each of the first connecting pipes and each of the second connecting pipes are respectively connected to the upper and lower ends of each resin tower. The three third connecting pipes are respectively connected to the first connecting pipe and the second connecting pipe of any two resin towers, and each third connecting pipe is provided with a cut-off valve. The refining device for chlorinated hydrochloric acid further includes: A main water inlet pipe, located above the three resin towers, and the main water inlet pipe is connected to the raw acid tank. A main water outlet pipe, located below the three resin towers, and both ends thereof are respectively connected to the raw acid tank and the trap. At least three water inlet branch pipes, one end of each of the three water inlet branch pipes is connected to the main water inlet pipe, and the other end is correspondingly connected to one of the three first connecting pipes. Each water inlet branch pipe is provided with a water inlet valve. And, At least three water outlet branch pipes, one end of each of the three water outlet branch pipes is connected to the main water outlet pipe, and the other end is correspondingly connected to one of the three second connecting pipes. Each water outlet branch pipe is provided with a water outlet valve.

3. The refining apparatus for hydrochloric acid chloride according to claim 2, wherein The refining device for chlorinated hydrochloric acid further includes: A main air inlet pipe, located above the three resin towers, one end of which is used for supplying steam and the other end is used for supplying nitrogen. A main air outlet pipe, located below the three resin towers, both ends of which are respectively connected to the raw acid tank and the finished product tank, and the middle part of the main air outlet pipe is connected to the cooling component. And, At least three air inlet branch pipes, both ends of each air inlet branch pipe are respectively connected to the air inlet branch pipe and each of the first connecting pipes, and each air inlet branch pipe is provided with an air inlet valve. And, At least three air outlet branch pipes, both ends of each air outlet branch pipe are respectively connected to the main air outlet pipe and the lower ends of each of the second connecting pipes, and each air outlet branch pipe is provided with an air outlet valve.

4. The refining device for hydrochloric acid chloride according to claim 1, characterized in that, The refining device for chlorinated hydrochloric acid further includes a flow meter, which is arranged between the adsorption pump and the resin adsorption structure and is close to the resin adsorption structure.

5. The refining device for hydrochloric acid chloride according to claim 1, characterized in that, The adsorption component further includes a fine filter, which is respectively connected to the raw acid tank and the resin adsorption structure.

6. The refining device for hydrochloric acid chloride according to claim 1, characterized in that, The cooling assembly includes a condenser and a cooler connected to each other. The condenser is connected to the resin adsorption structure, and the cooler is connected to the separation tank.

7. The refining device for hydrochloric acid chloride according to claim 1, wherein The refined device for hydrochloric acid chloride further includes a product pump, which is respectively connected to the product tank and the resin adsorption structure.

8. The refining device for hydrochloric acid chloride according to claim 1, wherein The desorption assembly further includes a waste water pump connected to the waste water tank and a solvent pump connected to the solvent tank.

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