Gas-liquid separation system of HCL falling film absorber

Abstract

The invention relates to the technical field of gas-liquid separation systems of HCL falling film absorbers, and discloses a gas-liquid separation system of an HCL falling film absorber, which comprises a gas inlet and pretreatment section, a gas-liquid distributor, a falling film absorption section, a gas-liquid separation section, a hydrogen-chlorine separator, a condensation and cooling module, a control module and a safety device, the air inlet and pretreatment section comprises an air inlet and a pretreatment section; the falling film absorption section comprises a falling film pipe, a pump, a circulating pipe and a liquid storage tank; the gas-liquid separation section comprises a separator and a liquid recovery pipe; the condensation and cooling module comprises a condenser and a cooling device, the control module comprises a sensor, an actuator, a controller and a human-computer interface, and the safety device comprises a pressure relief valve, an emergency cut-off valve and a safety shower; through the system, the absorption efficiency of the falling film absorber on HCL can be improved, the energy consumption is reduced, and the influence on the environment is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of gas-liquid separation system of HCL falling film absorber, in particular to a gas-liquid separation system of HCL falling film absorber. Background Art

[0002] HCL is a colorless gas with a pungent odor, which is widely used in the fields of chemical industry, electric power, metallurgy, etc. In the industrial production process, the emission and treatment of HCL is an important link. HCL is an irritating, corrosive and asphyxiating gas. If it is directly discharged without gas-liquid separation, it may cause safety accidents such as gas leakage and fire, posing a threat to the safety of personnel and equipment, and seriously polluting the environment, affecting human health and ecological balance, and causing waste of resources and increasing production costs.

[0003] When using traditional falling film absorbers, the gas-liquid contact is not sufficient. The gas and absorption liquid usually flow in a co-current manner, and there are relatively few opportunities for gas-liquid contact, resulting in low absorption efficiency. In addition, the size of the circulation volume directly affects the gas-liquid contact time and the liquid film thickness. Too much or too little circulation volume may reduce the absorption efficiency, thereby affecting the absorption effect.

[0004] For this purpose, we propose a gas-liquid separation system of HCL falling film absorber. Summary of the invention

[0005] The purpose of the present invention is to improve the absorption efficiency of HCL by a falling film absorber, reduce energy consumption and reduce the impact on the environment. The present application provides a gas-liquid separation system for a HCL falling film absorber.

[0006] The technical solution adopted by the present invention is as follows: A gas-liquid separation system of an HCL falling film absorber, the gas-liquid separation system comprising an air inlet and a pretreatment section, a gas-liquid distributor, a falling film absorption section, a gas-liquid separation section, a hydrogen-chlorine separator, a condensation and cooling module, a control module and a safety device; The air inlet and pretreatment section include an air inlet and a pretreatment section; the falling film absorption section includes a falling film tube, a pump, a circulation tube and a liquid storage tank; the gas-liquid separation section includes a separator and a liquid recovery tube; the condensation and cooling module includes a condenser and a cooling device, the control module includes a sensor, an actuator, a controller and a human-machine interface, and the safety device includes a pressure relief valve, an emergency shut-off valve and a safety shower.

[0007] In a preferred embodiment of the invention, the air inlet is the entrance of the system, which is used to receive the gas flow containing HCL, and a filtering device is installed at the air inlet to remove solid particles and impurities in the gas to prevent them from causing damage to subsequent modules; the pretreatment section is located after the air inlet, and is used for preliminary treatment of heating, cooling and dehumidification of the gas to optimize the physical state of the gas and pretreat it for subsequent absorption and separation processes.

[0008] In a preferred embodiment of the invention, the gas-liquid distributor is located at the top of the absorber, and is used to evenly guide the gas and liquid to various parts of the absorber.

[0009] In a preferred embodiment of the invention, the falling film tube is made of corrosion-resistant materials such as stainless steel or graphite, and is filled with absorption liquid. When the gas passes through the falling film tube, the absorption liquid flows down along the tube wall in the form of a thin film, and fully contacts and reacts with the gas. The cooperation of the pump, the circulation pipe and the liquid storage tank can drive the absorption liquid to circulate in the falling film tube to continuously absorb HCL in the gas.

[0010] In a preferred embodiment of the invention, the gas-liquid separation section is located after the falling film absorption section, and is used to completely separate the absorbed gas and liquid.

[0011] In a preferred embodiment of the invention, the hydrogen-chlorine separator is used to separate hydrogen and chlorine from the main gas flow for subsequent treatment or utilization.

[0012] In a preferred embodiment of the invention, the condenser is used to condense water vapor in the gas into liquid for subsequent treatment or recovery, and the condenser is usually cooled by cooling water or refrigerant.

[0013] In a preferred embodiment of the invention, the cooling device comprises a cooling tower, a heat exchanger and a cooling fan, and the cooling device is used to reduce the temperature of each module of the system to prevent overheating and damage.

[0014] In a preferred embodiment of the invention, the control module is used to monitor and adjust various temperature, pressure and flow parameters of the system.

[0015] In a preferred embodiment of the invention, the safety device is used to protect the safety of personnel and equipment when the system pressure is too high or other emergency situations occur.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, when gas-liquid separation is carried out, the absorption liquid is formed into a thin film to increase the contact area and improve the absorption efficiency. The absorption liquid is driven to circulate in the falling film tube through the cooperation of the pump, the circulation pipe and the liquid storage tank to continuously absorb the HCL in the gas, thereby ensuring the high efficiency and continuity of the absorption process and improving the absorption efficiency of the falling film absorber for HCL.

[0017] 2. In the present invention, when gas-liquid separation is performed, the heat in the gas can be quickly taken away by the circulation of the cooling medium, so that the water vapor can be quickly condensed into liquid, thereby improving the condensation efficiency. In addition, the use of the cooling medium can ensure that the condenser operates within a stable temperature range, thereby maintaining the stability of the system operation; using environmentally friendly media such as cooling water for cooling can not only reduce energy consumption, but also reduce the impact on the environment.

[0018] 3. In the present invention, the gas can be heated, cooled and dehumidified through the air inlet and the pretreatment section to improve its physical state, making the pretreated gas easier to absorb and separate, and reducing the impact of impurities and adverse physical states on the system, thereby improving the overall processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a system diagram of gas-liquid separation of the HCL falling film absorber in the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The following will be combined Figure 1 A gas-liquid separation system of an HCL falling film absorber according to an embodiment of the present invention is described in detail. Example

[0022] Reference Figure 1, a gas-liquid separation system of an HCL falling film absorber, the gas-liquid separation system comprises an air inlet and a pretreatment section, a gas-liquid distributor, a falling film absorption section, a gas-liquid separation section, a hydrogen-chlorine separator, a condensation and cooling module, a control module and a safety device; the air inlet and the pretreatment section comprise an air inlet and a pretreatment section; the air inlet is the entrance of the system, which is used to receive a gas flow containing HCL, and a filtering device is installed at the air inlet to remove solid particles and impurities in the gas to prevent them from causing damage to subsequent modules; the pretreatment section is located after the air inlet, and is used for preliminary treatment of heating, cooling and dehumidifying the gas to optimize the physical state of the gas and pretreat it for subsequent absorption and separation processes; specifically, the gas can be heated, cooled and dehumidified through the air inlet and the pretreatment section to improve its physical state, so that the pretreated gas is easier to absorb and separate, and the influence of impurities and adverse physical states on the system is reduced, thereby improving the overall processing efficiency.

[0023] Reference Figure 1 The gas-liquid distributor is located at the top of the absorber and is used to evenly guide the gas and liquid to various parts of the absorber. Specifically, the gas-liquid distributor can make the surface of the packing completely wet, thereby increasing the gas-liquid contact area, which helps to improve the absorption efficiency and improve the efficient and continuous absorption of corrosive gases such as HCl. The gas-liquid distributor also helps to optimize the overall performance of the absorber, reduce resistance, and improve heat transfer efficiency, thereby extending the life of the equipment. The falling film absorption section includes a falling film tube, a pump, a circulation tube, and a liquid storage tank. The falling film tube is made of corrosion-resistant materials such as stainless steel or graphite, and the falling film tube is The inner part is filled with absorption liquid. When the gas passes through the falling film tube, the absorption liquid flows down along the tube wall in the form of a thin film, fully contacts and reacts with the gas. The cooperation of the pump, the circulation pipe and the liquid storage tank can drive the absorption liquid to circulate in the falling film tube to continuously absorb HCL in the gas. Specifically, when the gas-liquid separation is carried out, the absorption liquid forms a thin film to increase the contact area and improve the absorption efficiency. The absorption liquid is driven to circulate in the falling film tube through the cooperation of the pump, the circulation pipe and the liquid storage tank to continuously absorb HCL in the gas, thereby ensuring the high efficiency and continuity of the absorption process and improving the absorption efficiency of the falling film absorber for HCL.

[0024] Reference Figure 1 The gas-liquid separation section includes a separator and a liquid recovery pipe; the gas-liquid separation section is located after the falling film absorption section, and is used to completely separate the absorbed gas and liquid; specifically, through effective gas-liquid separation, the impurity interference in the subsequent processing steps can be reduced, and the processing efficiency and stability of the overall system can be improved; the design of the liquid recovery pipe helps to recover valuable liquids, realize resource reuse, reduce costs, and protect subsequent equipment from liquid erosion or gas shock, thereby extending the service life of the equipment.

[0025] Reference Figure 1The hydrogen-chlorine separator is used to separate hydrogen and chlorine from the main gas flow for subsequent treatment or utilization; specifically, the hydrogen-chlorine separator is connected to the mixed gas collection port and is installed inside the gas-liquid separation section of the HCL falling film absorber. The hydrogen-chlorine separator can effectively separate HCL, hydrogen and chlorine, reducing impurity interference during subsequent treatment and optimizing the processing efficiency and stability of the overall system.

[0026] Reference Figure 1 The condensation and cooling module includes a condenser and a cooling device. The condenser is used to condense the water vapor in the gas into liquid for subsequent treatment or recovery, and the condenser is usually cooled by cooling water or refrigerant. The cooling device includes a cooling tower, a heat exchanger and a cooling fan, and the cooling device is used to reduce the temperature of each module of the system to prevent overheating and damage; specifically, when gas-liquid separation is performed, the heat in the gas can be quickly taken away by the circulation of the cooling medium, so that the water vapor can be quickly condensed into liquid, thereby improving the condensation efficiency, and the use of the cooling medium can ensure that the condenser operates within a stable temperature range, thereby maintaining the stability of the system operation; using environmentally friendly media such as cooling water for cooling can not only reduce energy consumption, but also reduce the impact on the environment.

[0027] Reference Figure 1 The control module includes sensors, actuators, controllers and human-machine interfaces. The safety devices include pressure relief valves, emergency shut-off valves and safety showers. Specifically, when the system pressure is too high, the pressure relief valve automatically opens to release excess pressure and protect the system from damage. When encountering emergencies such as system leakage or abnormal pressure increase, the emergency shut-off valve can quickly cut off the gas source to prevent the accident from expanding. In addition, the safety shower can provide emergency flushing for operators whose skin or eyes come into contact with harmful substances such as hydrogen chloride to reduce injuries.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas-liquid separation system of an HCL falling film absorber, characterized in that: The gas-liquid separation system includes an air inlet and pretreatment section, a gas-liquid distributor, a falling film absorption section, a gas-liquid separation section, a hydrogen-chlorine separator, a condensation and cooling module, a control module and a safety device; The air inlet and pretreatment section include an air inlet and a pretreatment section; the falling film absorption section includes a falling film tube, a pump, a circulation tube and a liquid storage tank; the gas-liquid separation section includes a separator and a liquid recovery tube; the condensation and cooling module includes a condenser and a cooling device, the control module includes a sensor, an actuator, a controller and a human-machine interface, and the safety device includes a pressure relief valve, an emergency shut-off valve and a safety shower.

2. The gas-liquid separation system of the HCL falling film absorber according to claim 1, characterized in that: The air inlet is the entrance of the system, which is used to receive the gas flow containing HCL, and a filtering device is installed at the air inlet to remove solid particles and impurities in the gas to prevent them from causing damage to subsequent modules; the pretreatment section is located after the air inlet, and is used for preliminary treatment of heating, cooling and dehumidification of the gas to optimize the physical state of the gas and pre-treat it for subsequent absorption and separation processes.

3. The gas-liquid separation system of the HCL falling film absorber according to claim 1, characterized in that: The gas-liquid distributor is located at the top of the absorber and is used to evenly guide the gas and liquid to various parts of the absorber.

4. The gas-liquid separation system of the HCL falling film absorber according to claim 1, characterized in that: The falling film tube is made of corrosion-resistant materials such as stainless steel or graphite, and is filled with absorption liquid. When the gas passes through the falling film tube, the absorption liquid flows down along the tube wall in the form of a thin film, and fully contacts and reacts with the gas. The cooperation of the pump, the circulation pipe and the liquid storage tank can drive the absorption liquid to circulate in the falling film tube to continuously absorb HCL in the gas.

5. The gas-liquid separation system of the HCL falling film absorber according to claim 1, characterized in that: The gas-liquid separation section is located after the falling film absorption section and is used to completely separate the absorbed gas and liquid.

6. The gas-liquid separation system of the HCL falling film absorber according to claim 1, characterized in that: The hydrogen-chlorine separator is used to separate hydrogen and chlorine from the main gas flow for subsequent treatment or utilization.

7. The gas-liquid separation system of the HCL falling film absorber according to claim 1, characterized in that: The condenser is used to condense water vapor in the gas into liquid for subsequent treatment or recovery, and the condenser is usually cooled by cooling water or refrigerant.

8. The gas-liquid separation system of the HCL falling film absorber according to claim 1, characterized in that: The cooling device includes a cooling tower, a heat exchanger and a cooling fan, and the cooling device is used to reduce the temperature of each module of the system to prevent overheating and damage.

9. The gas-liquid separation system of the HCL falling film absorber according to claim 1, characterized in that: The control module is used to monitor and adjust various temperature, pressure and flow parameters of the system.

10. The gas-liquid separation system of the HCL falling film absorber according to claim 1, characterized in that: The safety device is used to protect the safety of personnel and equipment when the system pressure is too high or other emergency situations occur.

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