Device and method for producing high-concentration and low-concentration hydrogen chloride organic solution
By using the first and second film absorbers in the production device of hydrogen chloride organic solution, combined with the control of hydrogen chloride flow and the number of cycles to solve the problem of low concentration fluctuations in the production of low -concentration hydrogen chloride organic solutions, realized efficient, can be efficient, can be available Controlling production process.
Patent Information
- Application Number
- CN202411543945.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-01-28
AI Technical Summary
In the production of low-concentration hydrogen chloride organic solutions, the prior art has problems such as large concentration fluctuations, poor uniformity, difficult production switching, and difficult indicators to control.
A device that includes the first and second -dimensional membrane absorbers, through controlling the flow of hydrogen chloride and the number of cycles to achieve the concentration control of low concentration of hydrogen chloride organic solution, and the diluted solution of the liquid organic object when needed to ensure that the indicators are in the appropriate range in the appropriate range Inside.
The concentration of low -concentration of hydrogen chloride organic solution is performed and the controllability of production indicators, while reducing the concentration fluctuations and temperature fluctuations of high -concentration of hydrogen chloride organic solution, which improves the flexibility and stability of production.
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Figure CN119367945A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of chemical equipment, in particular to a device for producing high-concentration and low-concentration hydrogen chloride organic solutions. Background Art
[0002] Hydrogen chloride organic solution has a wide range of applications in the pharmaceutical intermediates industry and is a raw material for the preparation of a variety of pharmaceutical intermediates. Various types of hydrogen chloride organic solutions can be obtained by dissolving hydrogen chloride gas in methanol, ethanol, ethyl acetate and other liquid organic matter. According to the needs of downstream customers, it is necessary to produce hydrogen chloride organic solutions of different concentrations. The concentration range of the main hydrogen chloride organic solution is concentrated between 10% and 36%. When the concentration is too high, hydrogen chloride gas is very easy to evaporate from the organic matter during transportation and storage. At present, there are two main methods for producing hydrogen chloride organic solution. The first is the direct method, that is, hydrogen chloride gas is passed into a container containing liquid organic matter, and hydrogen chloride gas is dissolved in the liquid organic matter by stirring or gas bubbling, thereby obtaining a hydrogen chloride organic solution. The second is the falling film absorption method, which uses a multi-stage falling film absorber in series to reversely absorb liquid organic matter and hydrogen chloride gas to obtain a hydrogen chloride organic solution.
[0003] Whether it is the straight-through method or the two-stage falling film absorber in series, the multi-stage falling film absorber in series and other production methods, they are more conducive to the production of high-concentration hydrogen chloride organic solution. When producing low-concentration hydrogen chloride organic solution, there are problems such as large fluctuation range of hydrogen chloride concentration, poor product uniformity, difficulty in production switching operation, and difficult control of indicators. Summary of the invention
[0004] In view of the above technical problems, the present invention provides a device for producing high and low concentration hydrogen chloride organic solutions.
[0005] In order to achieve the above object, the technical solution of the present invention is as follows: A device for producing high- and low-concentration hydrogen chloride organic solutions, comprising: first falling film absorber; A liquid organic matter storage tank, the outlet end of which is connected to the top liquid inlet of the first falling film absorber through a liquid organic matter delivery pump; The first falling film absorber hydrogen chloride gas switch valve has one end connected to the hydrogen chloride gas supply system and the other end connected to the bottom gas inlet of the first falling film absorber through the first falling film absorber hydrogen chloride gas flowmeter; A low-concentration hydrogen chloride organic solution storage tank, whose inlet end is connected to the first bottom liquid outlet of the first falling film absorber, whose first outlet end is connected to the user unit through the low-concentration hydrogen chloride organic solution finished product outlet switch valve, and whose second outlet end is connected to the top liquid return port of the first falling film absorber through the low-concentration hydrogen chloride organic solution circulation pump; a second falling film absorber; A low-concentration hydrogen chloride organic solution delivery pump, whose inlet end is connected to the second bottom liquid outlet of the first falling film absorber, and whose outlet end is connected to the top liquid inlet of the second falling film absorber through the switch valve between the first falling film absorber and the second falling film absorber and the low-concentration hydrogen chloride organic solution flowmeter in sequence; The second falling film absorber hydrogen chloride gas switch valve has one end connected to the hydrogen chloride gas supply system, and the other end connected to the bottom gas inlet of the second falling film absorber through the second falling film absorber hydrogen chloride gas flowmeter; The high concentration hydrogen chloride organic solution storage tank has an inlet end connected to the bottom liquid outlet of the second falling film absorber, a first outlet end connected to the user unit through a high concentration hydrogen chloride organic solution finished product outlet switch valve, and a second outlet end connected to the top liquid return port of the second falling film absorber through a high concentration hydrogen chloride organic solution circulation pump.
[0006] The present invention also includes: A tail gas absorption tower, the air inlet of which is connected to the top tail gas outlets of the first falling film absorber and the second falling film absorber through the first falling film absorber tail gas switch valve and the second falling film absorber tail gas switch valve respectively; The tail gas emission switch valve is arranged on the exhaust port of the tail gas absorption tower.
[0007] The present invention also provides a method for producing high-concentration and low-concentration hydrogen chloride organic solutions, including a method for producing a low-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of ≤20% and a method for producing a high-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of>20%. The method for producing a low-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of ≤20% comprises the following steps: A1. Close the switch valve between the first falling film absorber and the second falling film absorber and the low-concentration hydrogen chloride organic solution delivery pump; B1. Start the liquid organic matter delivery pump to allow the liquid organic matter to enter from the top of the first falling film absorber, open the hydrogen chloride gas switch valve of the first falling film absorber, use the hydrogen chloride gas flowmeter of the first falling film absorber for measurement, hydrogen chloride enters from the bottom of the first falling film absorber, the liquid organic matter and hydrogen chloride are reversely absorbed, and the temperature in the first falling film absorber is controlled within 0-10°C through the cooling water circulation pipeline of the first falling film absorber; C1, the hydrogen chloride organic solution flows into the low-concentration hydrogen chloride organic solution storage tank 6 from the bottom of the first falling film absorber 1, and the low-concentration hydrogen chloride organic solution circulation pump is turned on to allow the hydrogen chloride organic solution in the low-concentration hydrogen chloride organic solution storage tank to enter from the first falling film absorber again; D1. After the volume of the liquid organic matter reaches the specified amount, the liquid organic matter delivery pump is turned off. The specified volume is when the total volume of the hydrogen chloride organic solution formed after the liquid organic matter absorbs hydrogen chloride reaches within the range of 50%-85% of the volume of the low-concentration hydrogen chloride organic solution storage tank; E1. Determine the number of cycles of the low-concentration hydrogen chloride organic solution between the low-concentration hydrogen chloride organic solution storage tank 6 and the first falling film absorber 1 according to the solution detection result in the low-concentration hydrogen chloride organic solution storage tank; F1. After the solution test result in the low-concentration hydrogen chloride organic solution storage tank reaches the required index, the low-concentration hydrogen chloride organic solution circulation pump is turned off, the hydrogen chloride gas switch valve of the first falling film absorber is turned off, and the tail gas switch valve of the first falling film absorber is opened; G1. Open the outlet switch valve of the low-concentration hydrogen chloride organic solution finished product and go to the packaging process; Wherein, in step B1, the flow rate of hydrogen chloride gas in the first falling film absorber is 40-180m 3 / h, the flow rate of liquid organic matter is controlled at 0.5-3m 3 / h; The production method of the high-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of more than 20% comprises the following steps: A2. Close the switch valve between the first falling film absorber and the second falling film absorber and the low-concentration hydrogen chloride organic solution delivery pump; B2. Start the liquid organic matter delivery pump to allow the liquid organic matter to enter from the top of the first falling film absorber. Open the hydrogen chloride gas switch valve of the first falling film absorber. Use the hydrogen chloride gas flowmeter of the first falling film absorber for measurement. Hydrogen chloride enters from the bottom of the first falling film absorber. The liquid organic matter and hydrogen chloride are reversely absorbed. The temperature of the first falling film absorber is controlled within 0-10°C through the cooling water circulation pipeline of the first falling film absorber. C2, the hydrogen chloride organic solution flows into the low-concentration hydrogen chloride organic solution storage tank 6 from the bottom of the first falling film absorber 1, and the low-concentration hydrogen chloride organic solution circulation pump is turned on to allow the hydrogen chloride organic solution in the low-concentration hydrogen chloride organic solution storage tank to enter the first falling film absorber again; D2. After the volume of the liquid organic matter reaches the specified amount, the liquid organic matter delivery pump is turned off. The specified volume is when the total volume of the hydrogen chloride organic solution formed after the liquid organic matter absorbs hydrogen chloride reaches within the range of 50%-85% of the volume of the low-concentration hydrogen chloride organic solution storage tank; E2. Determine the number of cycles of the low-concentration hydrogen chloride organic solution between the low-concentration hydrogen chloride organic solution storage tank 6 and the first falling film absorber 1 according to the solution detection result in the low-concentration hydrogen chloride organic solution storage tank; F2. After the detection result of low-concentration hydrogen chloride organic solution reaches 18-20%, close the hydrogen chloride gas switch valve of the first falling film absorber, open the switch valve between the first falling film absorber and the second falling film absorber and the low-concentration hydrogen chloride organic solution delivery pump, open the hydrogen chloride gas switch valve of the second falling film absorber, so that hydrogen chloride and low-concentration hydrogen chloride organic solution are reversely absorbed, and control the temperature in the second falling film absorber within 10-15°C through the cooling water circulation pipeline of the second falling film absorber; G2, turn on the high concentration hydrogen chloride organic solution circulation pump, so that the hydrogen chloride organic solution in the high concentration hydrogen chloride organic solution storage tank enters from the second falling film absorber again, and at the same time, the low concentration hydrogen chloride organic solution enters the second falling film absorber at the same time; H2. According to the test result of the hydrogen chloride organic solution in the high concentration hydrogen chloride organic solution storage tank, determine the amount of the low concentration hydrogen chloride organic solution entering the second falling film absorber and the number of cycles of the hydrogen chloride organic solution in the high concentration hydrogen chloride organic solution storage tank; I2. After the test result of the hydrogen chloride organic solution in the high-concentration hydrogen chloride organic solution storage tank meets the standard, close the switch valve between the first falling film absorber and the second falling film absorber and the low-concentration hydrogen chloride organic solution delivery pump, close the high-concentration hydrogen chloride organic solution circulation pump, close the hydrogen chloride gas switch valve of the second falling film absorber, and open the tail gas switch valve of the first falling film absorber and the tail gas switch valve of the second falling film absorber; J2. Open the outlet switch valve of the finished product of high-concentration hydrogen chloride organic solution and go to the packaging process; The hydrogen chloride gas flow rate of the first falling film absorber in step B2 is 40-180m 3 / h, the flow rate of liquid organic matter is controlled at 0.5-3m 3 / h; The hydrogen chloride gas flow rate of the first falling film absorber in step F2 is 40-100m 3 / h, the flow rate of low concentration hydrogen chloride organic solution is controlled at 0.5-3m 3 / h.
[0008] Among them, in the production method of the low-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of ≤20%, when the low-concentration organic solution is produced, if the concentration of the low-concentration hydrogen chloride organic solution is greater than 20% due to operational errors, the liquid organic matter delivery pump is turned on, and the liquid organic matter is replenished according to the amount of liquid organic matter entering and the hydrogen chloride gas flow rate, and then steps B1-G1 are repeated.
[0009] The beneficial effects of the present invention are as follows: when it is necessary to produce a low-concentration hydrogen chloride organic solution, only the first falling film absorber is used for production. The concentration of the low-concentration hydrogen chloride organic solution can be controlled by controlling the hydrogen chloride flow entering the first falling film absorber and the number of cycles of the low-concentration hydrogen chloride organic solution circulating into the first falling film absorber, while ensuring the uniformity of the concentration; when an operational error causes the required low-concentration hydrogen chloride organic solution to have a high concentration, it can be diluted by adding liquid organic matter to the first falling film absorber, thereby ensuring that the index is within an appropriate range, thereby increasing the controllability of the production index of the low-concentration hydrogen chloride organic solution. When it is necessary to produce a high-concentration hydrogen chloride organic solution, the first falling film absorber and the second falling film absorber are used in series for production, the first falling film absorber uses liquid organic matter to absorb hydrogen chloride, and the second falling film absorber uses a low-concentration hydrogen chloride organic solution with a constant concentration range to absorb hydrogen chloride, thereby ensuring that the hydrogen chloride concentration in the final high-concentration hydrogen chloride organic solution has a small fluctuation range and good uniformity, and the temperature fluctuation range of the second falling film absorber is small and easy to control. On the whole, the present invention can flexibly switch to produce high and low concentration hydrogen chloride organic solutions with a small fluctuation range of hydrogen chloride concentration and good uniformity on a set of equipment, and the operation is simple, the production of high and low concentration hydrogen chloride organic solutions is easy to switch, and the indicators are well controlled. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The present invention is further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the present invention.
[0011] In the figure, 1-first falling film absorber, 2-second falling film absorber, 3-tail gas absorption tower, 4-liquid organic matter storage tank, 5-high concentration hydrogen chloride organic solution storage tank, 6-low concentration hydrogen chloride organic solution storage tank, 7-low concentration hydrogen chloride organic solution circulation pump, 8-first falling film absorber hydrogen chloride gas switch valve, 9-first falling film absorber hydrogen chloride gas flowmeter, 10-second falling film absorber hydrogen chloride gas switch valve, 11-second falling film absorber hydrogen chloride gas flowmeter, 12-switch valve between the first falling film absorber and the second falling film absorber, 13-low concentration hydrogen chloride organic solution finished product outlet switch valve, 14-liquid organic matter delivery pump, 15-tail gas discharge switch valve, 16-high concentration hydrogen chloride organic solution finished product outlet switch valve, 17-first falling film absorber tail gas switch valve, 18-second falling film absorber tail gas switch valve, 19-high concentration hydrogen chloride organic solution circulation pump, 20-low concentration hydrogen chloride organic solution delivery pump, 21-low concentration hydrogen chloride organic solution flowmeter; DETAILED DESCRIPTION
[0012] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.
[0013] Example 1 like Figure 1 As shown, a device for producing high and low concentration hydrogen chloride organic solution comprises: a first falling film absorber 1; a liquid organic matter storage tank 4, the outlet end of which is connected to the top liquid inlet of the first falling film absorber 1 through a liquid organic matter delivery pump 14; a first falling film absorber hydrogen chloride gas switch valve 8, one end of which is connected to the hydrogen chloride gas supply system, and the other end of which is connected to the bottom gas inlet of the first falling film absorber 1 through a first falling film absorber hydrogen chloride gas flowmeter 9; a low concentration hydrogen chloride organic solution storage tank 6, the inlet end of which is connected to the first bottom liquid outlet of the first falling film absorber 1, the first outlet end of which is connected to the user unit through a low concentration hydrogen chloride organic solution finished product outlet switch valve 13, and the second outlet end of which is connected to the top liquid return port of the first falling film absorber 1 through a low concentration hydrogen chloride organic solution circulation pump 7; a second falling film absorber 2; a low concentration hydrogen chloride organic solution storage tank 6 ... A solution delivery pump 20, whose inlet end is connected to the second bottom liquid outlet of the first falling film absorber 1, and whose outlet end is connected to the top liquid inlet of the second falling film absorber 2 through the switch valve 12 between the first falling film absorber and the second falling film absorber and the low concentration hydrogen chloride organic solution flow meter 21 in sequence; a second falling film absorber hydrogen chloride gas switch valve 10, whose one end is connected to the hydrogen chloride gas supply system, and the other end is connected to the bottom gas inlet of the second falling film absorber 2 through the second falling film absorber hydrogen chloride gas flow meter 11; a high concentration hydrogen chloride organic solution storage tank 5, whose inlet end is connected to the bottom liquid outlet of the second falling film absorber 2, whose first outlet end is connected to the user unit through the high concentration hydrogen chloride organic solution finished product outlet switch valve 16, and whose second outlet end is connected to the top liquid return port of the second falling film absorber 2 through the high concentration hydrogen chloride organic solution circulation pump 19.
[0014] The present invention also includes: a tail gas absorption tower 3, whose air inlet is connected to the top tail gas outlets of the first falling film absorber 1 and the second falling film absorber 2 through the first falling film absorber tail gas switch valve 17 and the second falling film absorber tail gas switch valve 18 respectively; a tail gas emission switch valve 15 is arranged on the exhaust port of the tail gas absorption tower 3.
[0015] The present invention also provides a method for producing high-concentration and low-concentration hydrogen chloride organic solutions, including a method for producing a low-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of ≤20% and a method for producing a high-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of>20%. The method for producing a low-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of ≤20% comprises the following steps: A1, close the switch valve 12 and the low-concentration hydrogen chloride organic solution delivery pump 20 between the first falling film absorber and the second falling film absorber; B1. Start the liquid organic matter delivery pump 14 to allow the liquid organic matter to enter from the top of the first falling film absorber 1. Open the first falling film absorber hydrogen chloride gas switch valve 8. Use the first falling film absorber hydrogen chloride gas flowmeter 9 to measure. Hydrogen chloride enters from the bottom of the first falling film absorber 1. The liquid organic matter and hydrogen chloride are reversely absorbed. The temperature in the first falling film absorber 1 is controlled to be 0° C. through the cooling water circulation pipeline of the first falling film absorber 1. C1, the hydrogen chloride organic solution flows into the low-concentration hydrogen chloride organic solution storage tank 6 from the bottom of the first falling film absorber 1, and the low-concentration hydrogen chloride organic solution circulation pump 7 is turned on to allow the hydrogen chloride organic solution in the low-concentration hydrogen chloride organic solution storage tank 6 to enter the first falling film absorber 1 again; D1. After the volume of the liquid organic matter reaches a specified amount, the liquid organic matter delivery pump 14 is turned off. The specified volume is when the total volume of the hydrogen chloride organic solution formed after the liquid organic matter absorbs hydrogen chloride reaches 50% of the volume of the low-concentration hydrogen chloride organic solution storage tank 6; E1. Determine the number of cycles of the low-concentration hydrogen chloride organic solution between the low-concentration hydrogen chloride organic solution storage tank 6 and the first falling film absorber 1 according to the solution detection result in the low-concentration hydrogen chloride organic solution storage tank 6; F1. After the solution test result in the low-concentration hydrogen chloride organic solution storage tank 6 reaches the required index, the low-concentration hydrogen chloride organic solution circulation pump 7 is turned off, the first falling film absorber hydrogen chloride gas switch valve 8 is turned off, and the first falling film absorber tail gas switch valve 17 is opened; G1, open the outlet switch valve 13 of the low-concentration hydrogen chloride organic solution finished product and go to the packaging process; Wherein, in step B1, the flow rate of hydrogen chloride gas in the first falling film absorber 1 is 40m 3 / h, the flow rate of liquid organic matter is controlled at 0.5m 3 / h; The production method of the high-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of more than 20% comprises the following steps: A2, closing the switch valve 12 and the low-concentration hydrogen chloride organic solution delivery pump 20 between the first falling film absorber and the second falling film absorber; B2. Start the liquid organic matter delivery pump 14 to allow the liquid organic matter to enter from the top of the first falling film absorber 1. Open the first falling film absorber hydrogen chloride gas switch valve 8. Use the first falling film absorber hydrogen chloride gas flowmeter 9 to measure. Hydrogen chloride enters from the bottom of the first falling film absorber 1. The liquid organic matter and hydrogen chloride are reversely absorbed. The temperature of the first falling film absorber 1 is controlled within 0-10° C. through the cooling water circulation pipeline of the first falling film absorber 1. C2, the hydrogen chloride organic solution flows into the low-concentration hydrogen chloride organic solution storage tank 6 from the bottom of the first falling film absorber 1, and the low-concentration hydrogen chloride organic solution circulation pump 7 is turned on to allow the hydrogen chloride organic solution in the low-concentration hydrogen chloride organic solution storage tank 6 to enter the first falling film absorber 1 again; D2. After the volume of the liquid organic matter reaches a specified amount, the liquid organic matter delivery pump 14 is turned off. The specified volume is when the total volume of the hydrogen chloride organic solution formed after the liquid organic matter absorbs hydrogen chloride reaches 50% of the volume of the low-concentration hydrogen chloride organic solution storage tank 6; E2. Determine the number of cycles of the low-concentration hydrogen chloride organic solution between the low-concentration hydrogen chloride organic solution storage tank 6 and the first falling film absorber 1 according to the solution detection result in the low-concentration hydrogen chloride organic solution storage tank 6; F2. After the detection result of the low-concentration hydrogen chloride organic solution reaches 18%, the hydrogen chloride gas switch valve 8 of the first falling film absorber is closed, the switch valve 12 between the first falling film absorber and the second falling film absorber and the low-concentration hydrogen chloride organic solution delivery pump 20 are opened, and the hydrogen chloride gas switch valve 10 of the second falling film absorber is opened to make hydrogen chloride and the low-concentration hydrogen chloride organic solution absorb in reverse, and the temperature in the second falling film absorber 2 is controlled to be 10°C through the cooling water circulation pipeline of the second falling film absorber 2; G2, turn on the high concentration hydrogen chloride organic solution circulation pump 19, so that the hydrogen chloride organic solution in the high concentration hydrogen chloride organic solution storage tank 5 enters the second falling film absorber 2 again, and at the same time, the low concentration hydrogen chloride organic solution enters the second falling film absorber 2 at the same time; H2, according to the detection result of the hydrogen chloride organic solution in the high concentration hydrogen chloride organic solution storage tank 5, determine the amount of the low concentration hydrogen chloride organic solution entering the second falling film absorber 2, and the number of cycles of the hydrogen chloride organic solution in the high concentration hydrogen chloride organic solution storage tank 5; I2. After the test result of the organic hydrogen chloride solution in the high-concentration organic hydrogen chloride solution storage tank 5 meets the standard, close the switch valve 12 between the first falling film absorber and the second falling film absorber and the low-concentration organic hydrogen chloride solution delivery pump 20, close the high-concentration organic hydrogen chloride solution circulation pump 19, close the hydrogen chloride gas switch valve 10 of the second falling film absorber, and open the tail gas switch valve 17 of the first falling film absorber and the tail gas switch valve 18 of the second falling film absorber; J2, open the high concentration hydrogen chloride organic solution finished product outlet switch valve 16, go to the packaging process; The hydrogen chloride gas flow rate of the first falling film absorber 1 in step B2 is 40m 3 / h, the flow rate of liquid organic matter is controlled at 0.5m 3 / h; The hydrogen chloride gas flow rate of the first falling film absorber 1 in step F2 is 40m 3 / h, the flow rate of low concentration hydrogen chloride organic solution is controlled at 0.5m 3 / h.
[0016] Among them, in the production method of the low-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of ≤20%, when the low-concentration organic solution is produced, if the concentration of the low-concentration hydrogen chloride organic solution is greater than 20% due to operational errors, the liquid organic matter delivery pump 14 is turned on, and the liquid organic matter is replenished according to the amount of liquid organic matter entering and the hydrogen chloride gas flow rate, and then steps B1-G1 are repeated.
[0017] Example 2 like Figure 1 As shown, a device for producing high and low concentration hydrogen chloride organic solution comprises: a first falling film absorber 1; a liquid organic matter storage tank 4, the outlet end of which is connected to the top liquid inlet of the first falling film absorber 1 through a liquid organic matter delivery pump 14; a first falling film absorber hydrogen chloride gas switch valve 8, one end of which is connected to the hydrogen chloride gas supply system, and the other end of which is connected to the bottom gas inlet of the first falling film absorber 1 through a first falling film absorber hydrogen chloride gas flowmeter 9; a low concentration hydrogen chloride organic solution storage tank 6, the inlet end of which is connected to the first bottom liquid outlet of the first falling film absorber 1, the first outlet end of which is connected to the user unit through a low concentration hydrogen chloride organic solution finished product outlet switch valve 13, and the second outlet end of which is connected to the top liquid return port of the first falling film absorber 1 through a low concentration hydrogen chloride organic solution circulation pump 7; a second falling film absorber 2; a low concentration hydrogen chloride organic solution storage tank 6 ... A solution delivery pump 20, whose inlet end is connected to the second bottom liquid outlet of the first falling film absorber 1, and whose outlet end is connected to the top liquid inlet of the second falling film absorber 2 through the switch valve 12 between the first falling film absorber and the second falling film absorber and the low concentration hydrogen chloride organic solution flow meter 21 in sequence; a second falling film absorber hydrogen chloride gas switch valve 10, whose one end is connected to the hydrogen chloride gas supply system, and the other end is connected to the bottom gas inlet of the second falling film absorber 2 through the second falling film absorber hydrogen chloride gas flow meter 11; a high concentration hydrogen chloride organic solution storage tank 5, whose inlet end is connected to the bottom liquid outlet of the second falling film absorber 2, whose first outlet end is connected to the user unit through the high concentration hydrogen chloride organic solution finished product outlet switch valve 16, and whose second outlet end is connected to the top liquid return port of the second falling film absorber 2 through the high concentration hydrogen chloride organic solution circulation pump 19.
[0018] The present invention also includes: a tail gas absorption tower 3, whose air inlet is connected to the top tail gas outlets of the first falling film absorber 1 and the second falling film absorber 2 through the first falling film absorber tail gas switch valve 17 and the second falling film absorber tail gas switch valve 18 respectively; a tail gas emission switch valve 15 is arranged on the exhaust port of the tail gas absorption tower 3.
[0019] The present invention also provides a method for producing high-concentration and low-concentration hydrogen chloride organic solutions, including a method for producing a low-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of ≤20% and a method for producing a high-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of>20%. The method for producing a low-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of ≤20% comprises the following steps: A1, close the switch valve 12 and the low-concentration hydrogen chloride organic solution delivery pump 20 between the first falling film absorber and the second falling film absorber; B1. Start the liquid organic matter delivery pump 14 to allow the liquid organic matter to enter from the top of the first falling film absorber 1. Open the first falling film absorber hydrogen chloride gas switch valve 8. Use the first falling film absorber hydrogen chloride gas flowmeter 9 to measure. Hydrogen chloride enters from the bottom of the first falling film absorber 1. The liquid organic matter and hydrogen chloride are reversely absorbed. The temperature in the first falling film absorber 1 is controlled within 0-10°C through the cooling water circulation pipeline of the first falling film absorber 1. C1, the hydrogen chloride organic solution flows into the low-concentration hydrogen chloride organic solution storage tank 6 from the bottom of the first falling film absorber 1, and the low-concentration hydrogen chloride organic solution circulation pump 7 is turned on to allow the hydrogen chloride organic solution in the low-concentration hydrogen chloride organic solution storage tank 6 to enter the first falling film absorber 1 again; D1. After the volume of the liquid organic matter reaches a specified amount, the liquid organic matter delivery pump 14 is turned off. The specified volume is when the total volume of the hydrogen chloride organic solution formed after the liquid organic matter absorbs hydrogen chloride reaches 85% of the volume of the low-concentration hydrogen chloride organic solution storage tank 6; E1. Determine the number of cycles of the low-concentration hydrogen chloride organic solution between the low-concentration hydrogen chloride organic solution storage tank 6 and the first falling film absorber 1 according to the solution detection result in the low-concentration hydrogen chloride organic solution storage tank 6; F1. After the solution test result in the low-concentration hydrogen chloride organic solution storage tank 6 reaches the required index, the low-concentration hydrogen chloride organic solution circulation pump 7 is turned off, the first falling film absorber hydrogen chloride gas switch valve 8 is turned off, and the first falling film absorber tail gas switch valve 17 is opened; G1, open the outlet switch valve 13 of the low-concentration hydrogen chloride organic solution finished product and go to the packaging process; Wherein, in step B1, the flow rate of hydrogen chloride gas in the first falling film absorber 1 is 180m 3 / h, the liquid organic matter flow rate is controlled at 3m 3 / h; The production method of the high-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of more than 20% comprises the following steps: A2, closing the switch valve 12 and the low-concentration hydrogen chloride organic solution delivery pump 20 between the first falling film absorber and the second falling film absorber; B2. Start the liquid organic matter delivery pump 14 to allow the liquid organic matter to enter from the top of the first falling film absorber 1. Open the first falling film absorber hydrogen chloride gas switch valve 8. Use the first falling film absorber hydrogen chloride gas flowmeter 9 to measure. Hydrogen chloride enters from the bottom of the first falling film absorber 1. The liquid organic matter and hydrogen chloride are reversely absorbed. The temperature of the first falling film absorber 1 is controlled within 0-10° C. through the cooling water circulation pipeline of the first falling film absorber 1. C2, the hydrogen chloride organic solution flows into the low-concentration hydrogen chloride organic solution storage tank 6 from the bottom of the first falling film absorber 1, and the low-concentration hydrogen chloride organic solution circulation pump 7 is turned on to allow the hydrogen chloride organic solution in the low-concentration hydrogen chloride organic solution storage tank 6 to enter the first falling film absorber 1 again; D2. After the volume of the liquid organic matter reaches a specified amount, the liquid organic matter delivery pump 14 is turned off. The specified volume is when the total volume of the hydrogen chloride organic solution formed after the liquid organic matter absorbs hydrogen chloride reaches 85% of the volume of the low-concentration hydrogen chloride organic solution storage tank 6; E2. Determine the number of cycles of the low-concentration hydrogen chloride organic solution between the low-concentration hydrogen chloride organic solution storage tank 6 and the first falling film absorber 1 according to the solution detection result in the low-concentration hydrogen chloride organic solution storage tank 6; F2. After the detection result of the low-concentration hydrogen chloride organic solution reaches 20%, the hydrogen chloride gas switch valve 8 of the first falling film absorber is closed, the switch valve 12 between the first falling film absorber and the second falling film absorber and the low-concentration hydrogen chloride organic solution delivery pump 20 are opened, and the hydrogen chloride gas switch valve 10 of the second falling film absorber is opened to make hydrogen chloride and the low-concentration hydrogen chloride organic solution absorb in reverse, and the temperature in the second falling film absorber 2 is controlled to be 15°C through the cooling water circulation pipeline of the second falling film absorber 2; G2, turn on the high concentration hydrogen chloride organic solution circulation pump 19, so that the hydrogen chloride organic solution in the high concentration hydrogen chloride organic solution storage tank 5 enters the second falling film absorber 2 again, and at the same time, the low concentration hydrogen chloride organic solution enters the second falling film absorber 2 at the same time; H2, according to the detection result of the hydrogen chloride organic solution in the high concentration hydrogen chloride organic solution storage tank 5, determine the amount of the low concentration hydrogen chloride organic solution entering the second falling film absorber 2, and the number of cycles of the hydrogen chloride organic solution in the high concentration hydrogen chloride organic solution storage tank 5; I2. After the test result of the organic hydrogen chloride solution in the high-concentration organic hydrogen chloride solution storage tank 5 meets the standard, close the switch valve 12 between the first falling film absorber and the second falling film absorber and the low-concentration organic hydrogen chloride solution delivery pump 20, close the high-concentration organic hydrogen chloride solution circulation pump 19, close the hydrogen chloride gas switch valve 10 of the second falling film absorber, and open the tail gas switch valve 17 of the first falling film absorber and the tail gas switch valve 18 of the second falling film absorber; J2, open the high concentration hydrogen chloride organic solution finished product outlet switch valve 16, go to the packaging process; The hydrogen chloride gas flow rate of the first falling film absorber 1 in step B2 is 180m 3 / h, the liquid organic matter flow rate is controlled at 3m 3 / h; The hydrogen chloride gas flow rate of the first falling film absorber 1 in step F2 is 100m 3 / h, the flow rate of low concentration hydrogen chloride organic solution is controlled at 3m 3 / h.
[0020] Among them, in the production method of the low-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of ≤20%, when the low-concentration organic solution is produced, if the concentration of the low-concentration hydrogen chloride organic solution is greater than 20% due to operational errors, the liquid organic matter delivery pump 14 is turned on, and the liquid organic matter is replenished according to the amount of liquid organic matter entering and the hydrogen chloride gas flow rate, and then steps B1-G1 are repeated.
[0021] Example 3 like Figure 1 As shown, a method for producing a low-concentration hydrogen chloride methanol organic solution (hydrogen chloride concentration ≤ 20%) comprises the following steps: a. Close the switch valve 12 and the low-concentration hydrogen chloride organic solution delivery pump 20 between the first falling film absorber and the second falling film absorber.
[0022] b. Start the liquid organic matter delivery pump 14 to allow the liquid organic matter methanol to enter from the top of the first falling film absorber 1; open the hydrogen chloride gas switch valve 8 of the first falling film absorber, use the hydrogen chloride flowmeter for measurement, hydrogen chloride enters from the bottom of the first falling film absorber 1, the liquid organic matter methanol and hydrogen chloride are reversely absorbed, and the temperature of the first falling film absorber 1 is controlled at 0°C through the cooling water circulation pipeline.
[0023] The hydrogen chloride gas flow rate of the first falling film absorber 1 is 80m 3 / h. The methanol flow rate is controlled at 1m 3 / h.
[0024] c. The hydrogen chloride organic solution flows into the low-concentration hydrogen chloride organic solution storage tank 6 from the bottom of the first falling film absorber 1, and the low-concentration hydrogen chloride organic solution circulation pump 7 is turned on to allow the hydrogen chloride methanol organic solution in the low-concentration hydrogen chloride organic solution storage tank 6 to enter from the first falling film absorber 1 again.
[0025] d. After the volume of methanol reaches 60% of the volume of the low-concentration hydrogen chloride organic solution storage tank 6, the liquid organic matter delivery pump 14 is turned off.
[0026] e. The low-concentration hydrogen chloride organic solution circulates three times between the low-concentration hydrogen chloride organic solution storage tank 6 and the first falling film absorber 1.
[0027] f. At this time, the detection result of hydrogen chloride concentration in the low-concentration hydrogen chloride organic solution is 15.3%. Close the low-concentration hydrogen chloride organic solution circulation pump 7, the first falling film absorber hydrogen chloride gas switch valve 8, open the first falling film absorber tail gas absorption switch valve 17, and the tail gas goes to the absorption tower for absorption treatment and then meets the emission standards.
[0028] g. Open the outlet switch valve 13 of the low-concentration hydrogen chloride organic solution finished product and go to the packaging process.
[0029] Two more batches were produced in the same manner as in Example 3, and the concentrations of hydrogen chloride in the obtained low-concentration hydrogen chloride organic solutions were 15.7% and 15.4%, respectively. The concentration fluctuation range of the three batches was small, and the uniformity was good.
[0030] Example 4 like Figure 1 As shown, a method for producing a low-concentration hydrogen chloride methanol organic solution (hydrogen chloride concentration ≤ 20%) comprises the following steps: a. Close the switch valve 12 and the low-concentration hydrogen chloride organic solution delivery pump 20 between the first falling film absorber and the second falling film absorber.
[0031] b. Start the liquid organic methanol delivery pump to allow the liquid organic methanol to enter from the top of the first falling film absorber 1; open the hydrogen chloride gas switch valve 8 of the first falling film absorber, use the hydrogen chloride flowmeter for measurement, hydrogen chloride enters from the bottom of the first falling film absorber 1, the liquid organic matter and hydrogen chloride are reversely absorbed, and the temperature of the first falling film absorber 1 is controlled at 0°C through the cooling water circulation pipeline.
[0032] The hydrogen chloride gas flow rate of the first falling film absorber 1 is 110m 3 / h. The methanol flow rate is controlled at 0.8m 3 / h.
[0033] c. The hydrogen chloride organic solution flows into the low-concentration hydrogen chloride organic solution storage tank 6 from the bottom of the first falling film absorber 1, and the low-concentration hydrogen chloride organic solution circulation pump 7 is turned on to allow the hydrogen chloride organic solution in the low-concentration hydrogen chloride organic solution storage tank 6 to enter the first falling film absorber 1 again.
[0034] d. After the volume of methanol reaches 60% of the volume of the low-concentration hydrogen chloride organic solution storage tank 6, the liquid organic matter delivery pump 14 is turned off.
[0035] e. The low-concentration hydrogen chloride organic solution circulates three times between the low-concentration hydrogen chloride organic solution storage tank 6 and the first falling film absorber 1.
[0036] f. At this time, the test result of the solution in the low-concentration hydrogen chloride organic solution storage tank 6 is 24.8%.
[0037] g. Close the hydrogen chloride inlet switch valve 8 of the first falling film absorber, open the liquid organic matter delivery 14, replenish the volume of methanol to 80% of the volume of the low-concentration organic solution storage tank 6, and close the liquid organic matter delivery pump 14.
[0038] h. Turn on the low-concentration hydrogen chloride organic solution circulation pump 7 to allow the hydrogen chloride methanol organic solution in the low-concentration hydrogen chloride organic solution storage tank 6 to enter the first falling film absorber 1 again.
[0039] i. The low-concentration hydrogen chloride organic solution circulates twice between the low-concentration hydrogen chloride organic solution storage tank 6 and the first falling film absorber 1.
[0040] j. At this time, the detection result of the low-concentration hydrogen chloride organic solution is 16.7%. The low-concentration hydrogen chloride organic solution circulation pump 7 is turned off, and the first falling film absorber tail gas absorption switch valve 17 is opened. The tail gas goes to the absorption tower for absorption treatment and then meets the emission standards.
[0041] k. Open the outlet switch valve 13 of the low-concentration hydrogen chloride organic solution finished product and go to the packaging process.
[0042] Two more batches were produced in the same manner as in Example 4, and the concentrations of hydrogen chloride in the obtained low-concentration hydrogen chloride organic solutions were 16.1% and 16.8%, respectively. The concentration fluctuation range of the three batches was small, and the uniformity was good.
[0043] Example 5 like Figure 1 As shown, a method for producing a high-concentration hydrogen chloride methanol organic solution (hydrogen chloride concentration>20%) comprises the following steps: a. Close the switch valve 12 and the low-concentration hydrogen chloride organic solution delivery pump 20 between the first falling film absorber and the second falling film absorber.
[0044] b. Start the liquid organic methanol delivery pump to allow the liquid organic methanol to enter from the top of the first falling film absorber 1; open the hydrogen chloride gas switch valve 8 of the first falling film absorber, use the hydrogen chloride flowmeter for measurement, hydrogen chloride enters from the bottom of the first falling film absorber 1, the liquid organic matter and hydrogen chloride are reversely absorbed, and the temperature of the first falling film absorber 1 is controlled at 0°C through the cooling water circulation pipeline.
[0045] The hydrogen chloride gas flow rate of the first falling film absorber 1 is 90m 3 / h. The methanol flow rate is controlled at 1m 3 / h.
[0046] c. The hydrogen chloride organic solution flows into the low-concentration hydrogen chloride organic solution storage tank 6 from the bottom of the first falling film absorber, and the low-concentration hydrogen chloride organic solution circulation pump 7 is turned on to allow the hydrogen chloride organic solution in the low-concentration hydrogen chloride organic solution storage tank 6 to enter from the first falling film absorber 1 again.
[0047] d. After the volume of methanol reaches 60% of the volume of the low-concentration hydrogen chloride organic solution storage tank 6, the liquid organic matter delivery pump 14 is turned off.
[0048] e. The low-concentration hydrogen chloride organic solution circulates three times between the low-concentration hydrogen chloride organic solution storage tank 6 and the first falling film absorber 1.
[0049] f. At this time, the solution test result in the low-concentration hydrogen chloride organic solution storage tank 6 is 18.5%. Close the hydrogen chloride gas switch valve 8 of the first falling film absorber, open the switch valve 12 between the first falling film absorber and the second falling film absorber and the low-concentration hydrogen chloride organic solution delivery pump 20, open the hydrogen chloride gas switch valve 10 of the second falling film absorber, and at this time the hydrogen chloride flow rate of the second falling film absorber 2 is 90m 3 / h, 18.5% low concentration hydrogen chloride organic solution enters the second falling film absorber 2 with a flow rate of 1m 3 / h, the second falling film absorption is controlled by a cooling water circulation pipeline, and the temperature is at 10℃.
[0050] g. Turn on the high concentration hydrogen chloride organic solution circulation pump 19 to allow the hydrogen chloride organic solution in the high concentration hydrogen chloride organic solution storage tank 5 to enter the second falling film absorber 2 again, and at the same time, the low concentration hydrogen chloride organic solution enters the second falling film absorber 2 at the same time.
[0051] h. When the concentration of the hydrogen chloride organic solution in the high-concentration hydrogen chloride organic solution storage tank 5 is detected to 36.1%, Close the switch valve 12 and the low concentration hydrogen chloride organic solution delivery pump 20 between the first falling film absorber and the second falling film absorber, close the high concentration hydrogen chloride organic solution circulation pump 19, close the hydrogen chloride gas switch valve 10 of the second falling film absorber, and open the first falling film absorber tail gas switch valve 17 and the second falling film absorber tail gas switch valve 18.
[0052] i. Open the outlet switch valve 16 of the high-concentration hydrogen chloride organic solution finished product and go to the packaging process.
[0053] Two more batches were produced in the same manner as in Example 5, and the concentrations of hydrogen chloride in the obtained high-concentration hydrogen chloride organic solutions were 36.4% and 35.8%, respectively. The concentration fluctuation range of the three batches was small, and the uniformity was good.
[0054] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.
Claims
1. A device for producing high and low concentration hydrogen chloride organic solutions, characterized in that: include: A first falling film absorber (1); A liquid organic matter storage tank (4), the outlet end of which is connected to the top liquid inlet of the first falling film absorber (1) via a liquid organic matter delivery pump (14); A first falling film absorber hydrogen chloride gas on-off valve (8), one end of which is connected to the hydrogen chloride gas supply system, and the other end of which is connected to the bottom gas inlet of the first falling film absorber (1) via a first falling film absorber hydrogen chloride gas flowmeter (9); A low-concentration hydrogen chloride organic solution storage tank (6), whose inlet end is connected to the first bottom liquid outlet of the first falling film absorber (1), whose first outlet end is connected to the user unit through a low-concentration hydrogen chloride organic solution finished product outlet switch valve (13), and whose second outlet end is connected to the top liquid return port of the first falling film absorber (1) through a low-concentration hydrogen chloride organic solution circulation pump (7); A second falling film absorber (2); A low-concentration hydrogen chloride organic solution delivery pump (20), the inlet end of which is connected to the second bottom liquid outlet of the first falling film absorber (1), and the outlet end of which is connected to the top liquid inlet of the second falling film absorber (2) via a switch valve (12) between the first falling film absorber and the second falling film absorber and a low-concentration hydrogen chloride organic solution flow meter (21); A second falling film absorber hydrogen chloride gas on-off valve (10), one end of which is connected to the hydrogen chloride gas supply system, and the other end of which is connected to the bottom gas inlet of the second falling film absorber (2) via a second falling film absorber hydrogen chloride gas flowmeter (11); The high-concentration hydrogen chloride organic solution storage tank (5) has an inlet end connected to the bottom liquid outlet of the second falling film absorber (2), a first outlet end connected to a user unit via a high-concentration hydrogen chloride organic solution finished product outlet switch valve (16), and a second outlet end connected to the top liquid return port of the second falling film absorber (2) via a high-concentration hydrogen chloride organic solution circulation pump (19).
2. The device for producing high and low concentration hydrogen chloride organic solutions according to claim 1, characterized in that: Also includes: A tail gas absorption tower (3), the gas inlet of which is connected to the top tail gas outlets of the first falling film absorber (1) and the second falling film absorber (2) through the first falling film absorber tail gas switch valve (17) and the second falling film absorber tail gas switch valve (18) respectively; The tail gas emission on-off valve (15) is arranged on the exhaust port of the tail gas absorption tower (3).
3. A method for producing high and low concentration hydrogen chloride organic solutions, characterized in that: Including the production method of low-concentration organic hydrogen chloride solution with a hydrogen chloride concentration of ≤20% and the production method of high-concentration organic hydrogen chloride solution with a hydrogen chloride concentration of >20%; The method for producing a low-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of ≤20% comprises the following steps: A1, closing the switch valve (12) between the first falling film absorber and the second falling film absorber and the low-concentration hydrogen chloride organic solution delivery pump (20); B1. Start the liquid organic matter delivery pump (14) to allow the liquid organic matter to enter from the top of the first falling film absorber (1), open the hydrogen chloride gas switch valve (8) of the first falling film absorber, use the hydrogen chloride gas flowmeter (9) of the first falling film absorber for measurement, hydrogen chloride enters from the bottom of the first falling film absorber (1), the liquid organic matter and hydrogen chloride are reversely absorbed, and the temperature in the first falling film absorber (1) is controlled within a range of 0-10° C. through the cooling water circulation pipeline of the first falling film absorber (1); C1, the hydrogen chloride organic solution flows from the bottom of the first falling film absorber (1) into the low-concentration hydrogen chloride organic solution storage tank (6), and the low-concentration hydrogen chloride organic solution circulation pump (7) is turned on to allow the hydrogen chloride organic solution in the low-concentration hydrogen chloride organic solution storage tank (6) to enter the first falling film absorber (1) again; D1. After the volume of the liquid organic matter reaches a specified amount, the liquid organic matter delivery pump (14) is turned off. The specified volume is when the total volume of the hydrogen chloride organic solution formed after the liquid organic matter absorbs hydrogen chloride reaches within a range of 50%-85% of the volume of the low-concentration hydrogen chloride organic solution storage tank (6); E1. Determine the number of cycles of the low-concentration hydrogen chloride organic solution between the low-concentration hydrogen chloride organic solution storage tank (6) and the first falling film absorber (1) based on the test result of the solution in the low-concentration hydrogen chloride organic solution storage tank (6); F1. After the test result of the solution in the low-concentration hydrogen chloride organic solution storage tank (6) reaches the required index, the low-concentration hydrogen chloride organic solution circulation pump (7) is turned off, the hydrogen chloride gas switch valve (8) of the first falling film absorber is turned off, and the tail gas switch valve (17) of the first falling film absorber is opened; G1, open the outlet switch valve (13) of the low-concentration hydrogen chloride organic solution finished product to go to the packaging process; In step B1, the flow rate of hydrogen chloride gas in the first falling film absorber (1) is 40-180 m3 / h, and the flow rate of liquid organic matter is controlled at 0.5-3 m 3 / h; The production method of the high-concentration hydrogen chloride organic solution with a hydrogen chloride concentration of more than 20% comprises the following steps: A2, closing the switch valve (12) between the first falling film absorber and the second falling film absorber and the low-concentration hydrogen chloride organic solution delivery pump (20); B2. Start the liquid organic matter delivery pump (14) to allow the liquid organic matter to enter from the top of the first falling film absorber (1). Open the hydrogen chloride gas switch valve (8) of the first falling film absorber. Use the hydrogen chloride gas flowmeter (9) of the first falling film absorber for measurement. Hydrogen chloride enters from the bottom of the first falling film absorber (1). The liquid organic matter and hydrogen chloride are reversely absorbed. The temperature of the first falling film absorber (1) is controlled within a range of 0-10° C. through the cooling water circulation pipeline of the first falling film absorber (1). C2, the hydrogen chloride organic solution flows from the bottom of the first falling film absorber (1) into the low-concentration hydrogen chloride organic solution storage tank (6), and the low-concentration hydrogen chloride organic solution circulation pump (7) is turned on to allow the hydrogen chloride organic solution in the low-concentration hydrogen chloride organic solution storage tank (6) to enter the first falling film absorber (1) again; D2. After the volume of the liquid organic matter reaches a specified amount, the liquid organic matter delivery pump (14) is turned off. The specified volume is when the total volume of the hydrogen chloride organic solution formed after the liquid organic matter absorbs hydrogen chloride reaches within a range of 50%-85% of the volume of the low-concentration hydrogen chloride organic solution storage tank (6); E2. Determine the number of cycles of the low-concentration hydrogen chloride organic solution between the low-concentration hydrogen chloride organic solution storage tank (6) and the first falling film absorber (1) based on the test result of the solution in the low-concentration hydrogen chloride organic solution storage tank (6); F2. After the detection result of the low-concentration hydrogen chloride organic solution reaches 18-20%, the hydrogen chloride gas switch valve (8) of the first falling film absorber is closed, the switch valve (12) between the first falling film absorber and the second falling film absorber and the low-concentration hydrogen chloride organic solution delivery pump (20) are opened, and the hydrogen chloride gas switch valve (10) of the second falling film absorber is opened to allow hydrogen chloride and the low-concentration hydrogen chloride organic solution to be reversely absorbed, and the temperature in the second falling film absorber (2) is controlled within 10-15° C. through the cooling water circulation pipeline of the second falling film absorber (2); G2, turning on the high concentration hydrogen chloride organic solution circulation pump (19), so that the hydrogen chloride organic solution in the high concentration hydrogen chloride organic solution storage tank (5) enters the second falling film absorber (2) again, and at the same time, the low concentration hydrogen chloride organic solution enters the second falling film absorber (2); H2, according to the detection result of the hydrogen chloride organic solution in the high concentration hydrogen chloride organic solution storage tank (5), determine the amount of the low concentration hydrogen chloride organic solution entering the second falling film absorber (2) and the number of cycles of the hydrogen chloride organic solution in the high concentration hydrogen chloride organic solution storage tank (5); I2. After the test result of the hydrogen chloride organic solution in the high-concentration hydrogen chloride organic solution storage tank (5) reaches the standard, the switch valve (12) between the first falling film absorber and the second falling film absorber and the low-concentration hydrogen chloride organic solution delivery pump (20) are closed, the high-concentration hydrogen chloride organic solution circulation pump (19) is closed, the hydrogen chloride gas switch valve (10) of the second falling film absorber is closed, and the tail gas switch valve (17) of the first falling film absorber and the tail gas switch valve (18) of the second falling film absorber are opened; J2, open the outlet switch valve (16) of the high concentration hydrogen chloride organic solution finished product to go to the packaging process; The hydrogen chloride gas flow rate of the first falling film absorber (1) in step B2 is 40-180m 3 / h, the flow rate of liquid organic matter is controlled at 0.5-3m 3 / h; The flow rate of hydrogen chloride gas in the first falling film absorber (1) in step F2 is 40-100m 3 / h, the flow rate of low concentration hydrogen chloride organic solution is controlled at 0.5-3m 3 / h.
4. A method for producing high and low concentration hydrogen chloride organic solutions according to claim 3, characterized in that: In the production method of a low-concentration hydrogen chloride organic solution having a hydrogen chloride concentration of ≤20%, when the low-concentration organic solution is produced, if the concentration of the low-concentration hydrogen chloride organic solution becomes greater than 20% due to an operational error, the liquid organic matter delivery pump (14) is turned on, and the liquid organic matter is replenished according to the amount of liquid organic matter entering and the flow rate of hydrogen chloride gas, and then steps B1-G1 are repeated.