Sulfur-containing and salt-containing tail gas treatment system

Abstract

The invention relates to the technical field of tail gas treatment, and discloses a sulfur-containing and salt-containing tail gas treatment system, which comprises a tail gas collection module, which is responsible for collecting tail gas containing a large amount of sulfur-containing or salt-containing substances, and centralizing and conveying the tail gas to a subsequent treatment module; the neutralization corrosion inhibitor pre-filming module is used for treating sulfur-containing substances in the tail gas, and a layer of protective film is formed on the inner wall of the pipeline by injecting a neutralization corrosion inhibitor, so that the pipeline is prevented from being corroded by the sulfur-containing substances; the demineralized water spraying module is used for dissolving salt-containing substances on the equipment and spraying demineralized water. According to the sulfur-containing and salt-containing tail gas treatment system, through the synergistic effect of the tail gas collection module, the neutralization corrosion inhibitor pre-filming module, the demineralized water spraying module and the sewage settling separation module, sulfur-containing and salt-containing substances in tail gas are effectively removed, and corrosion of the substances to pipelines and blockage of equipment are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment, in particular to a sulfur- and salt-containing tail gas treatment system. Background Art

[0002] Exhaust gas treatment technology refers to a series of technical means for purifying and treating exhaust gas emitted by automobiles, factories, etc. By adopting physical, chemical and other methods, it can effectively remove harmful substances in exhaust gas, such as particulate matter, nitrogen oxides and sulfur oxides, to reduce pollution to the environment. The application of exhaust gas treatment technology helps to achieve the goals of energy conservation and emission reduction, protect the environment, and promote sustainable development. At the same time, with the continuous advancement of technology, exhaust gas treatment technology is also constantly updated and improved to meet increasingly stringent environmental protection requirements.

[0003] In the chemical production process, the tower top distillate or tail gas often contains a large amount of sulfur-containing or salt-containing substances. These substances change from gas to liquid during the cooling process, which not only causes pipeline corrosion, but also the salt-containing substances will accumulate in the equipment, causing equipment blockage and vibration, further aggravating the corrosion of the equipment and causing serious impact on production. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a sulfur-containing and salt-containing tail gas treatment system, which has the advantages of good stability and practicality to solve the above problems.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sulfur-containing and salt-containing tail gas treatment system, comprising: a tail gas collection module, which is responsible for collecting tail gas containing a large amount of sulfur-containing or salt-containing substances, concentrating and transporting them to a subsequent treatment module; a neutralization and corrosion inhibitor pre-filming module, which treats the sulfur-containing substances in the tail gas, and forms a protective film on the inner wall of the pipeline by injecting a neutralization and corrosion inhibitor to prevent the corrosion of the pipeline by the sulfur-containing substances; a desalted water spraying module is used to dissolve the salt-containing substances on the equipment, and dissolve the salt attached to the running parts of the equipment by spraying desalted water, and at the same time, desulfurization treatment is carried out by utilizing the characteristic that the sulfur-containing substances are soluble in water; a sewage sedimentation and separation module, which sediments and separates the sewage after the desalted water spraying treatment, and separates the sulfur and salt substances in the sewage for subsequent treatment.

[0008] Preferably, it also includes an acidic water stripping module, which processes the sewage after sedimentation separation to remove harmful substances such as sulfur and salt therein to meet environmental protection and safety requirements; and an exhaust gas monitoring and control module, which monitors the concentration of sulfur-containing and salt-containing substances in the exhaust gas in real time, and automatically adjusts the injection amount of the neutralizing corrosion inhibitor and the spraying amount of the desalted water according to the monitoring results.

[0009] Preferably, the exhaust gas collection module is composed of an exhaust gas collection pipe and an exhaust gas collection tank, the neutralization corrosion inhibitor pre-filming module is composed of a corrosion inhibitor storage tank, a corrosion inhibitor injection pump, and a corrosion inhibitor injector, the desalted water spray module is composed of a desalted water storage tank, a desalted water spray pump, and a spray head, and the sewage sedimentation and separation module is composed of a sedimentation tank and a separator.

[0010] Preferably, the acidic water stripping module is composed of a stripping tower, a condenser, and a reboiler, and the tail gas monitoring and control module is composed of a tail gas analyzer, a sensor, and a control system.

[0011] Preferably, an energy recovery module is also included, which is responsible for recovering heat energy or pressure energy from the processing process and converting it into a usable energy form.

[0012] Preferably, the energy recovery module further includes an energy storage device, and the energy storage device is used to store the recovered thermal energy or electrical energy.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the present invention provides a sulfur-containing and salt-containing tail gas treatment system, which has the following beneficial effects:

[0015] This is a sulfur-containing and salt-containing tail gas treatment system. Firstly, the system effectively removes sulfur-containing and salt-containing substances in the tail gas through the synergistic effect of the tail gas collection module, the neutralization and corrosion inhibitor pre-film module, the desalted water spray module and the sewage sedimentation and separation module, avoiding the corrosion of these substances to the pipeline and the blockage of the equipment, ensuring the continuous and stable operation of the production. Secondly, the introduction of the acid water stripping module and the tail gas monitoring and control module further improves the efficiency and safety of the tail gas treatment. The acid water stripping module can efficiently remove harmful substances in the sewage to meet the environmental protection and safety requirements; the tail gas monitoring and control module can monitor the tail gas composition in real time, automatically adjust the treatment parameters, and ensure that the tail gas treatment effect reaches the best state. In addition, the addition of the energy recovery module realizes the recovery and utilization of heat energy or pressure energy in the treatment process, reduces the production cost, and improves the economy and environmental protection of the system.

[0016] In summary, the sulfur- and salt-containing tail gas treatment system of the present invention not only solves the problem of tail gas treatment in chemical production, but also achieves the goals of energy conservation, emission reduction and environmental protection, and provides strong support for the sustainable development of enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a system diagram of a sulfur- and salt-containing tail gas treatment system of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0019] See also Figure 1 A sulfur-containing and salt-containing tail gas treatment system includes a tail gas collection module, which is responsible for collecting tail gas containing a large amount of sulfur-containing or salt-containing substances, concentrating and transporting them to a subsequent treatment module; a neutralization corrosion inhibitor pre-filming module, which processes the sulfur-containing substances in the tail gas, and forms a protective film on the inner wall of the pipeline by injecting a neutralization corrosion inhibitor to prevent the corrosion of the pipeline by the sulfur-containing substances; the desalted water spraying module is used to dissolve the salt-containing substances on the equipment, and dissolve the salt attached to the running parts of the equipment by spraying desalted water, and at the same time utilizes the sulfur-containing substances dissolved in water to dissolve the salt-containing substances on the equipment. Characteristics for desulfurization treatment; sewage sedimentation and separation module, the sewage sedimentation and separation module sediments and separates the sewage after desalted water spray treatment, separates the sulfur and salt substances in the sewage, and facilitates subsequent treatment, and also includes an acidic water stripping module, the acidic water stripping module processes the sewage after sedimentation and separation, removes harmful substances such as sulfur and salt therein, so that it meets the requirements of environmental protection and safety, and an exhaust gas monitoring and control module, the exhaust gas monitoring and control module monitors the concentration of sulfur and salt substances in the exhaust gas in real time, and automatically adjusts the injection amount of the neutralizing corrosion inhibitor and the spraying amount of the desalted water according to the monitoring results;

[0020] The sulfur-containing and salt-containing tail gas treatment system of the present invention, when implemented, firstly collects the generated sulfur-containing and salt-containing tail gas through the tail gas collection module and transports it to the treatment system. Subsequently, the neutralization corrosion inhibitor pre-filming module injects the neutralization corrosion inhibitor to form a protective film to prevent sulfur-containing substances from corroding the pipeline. Then, the desalted water spraying module starts to work, sprays the desalted water to dissolve the salt on the equipment, and uses the property of sulfur-containing substances being soluble in water to perform desulfurization treatment. The treated sewage enters the sewage sedimentation and separation module, and sulfur, salt and other harmful substances are separated through sedimentation and separation. Subsequently, the acidic water stripping module further processes the separated sewage to remove the harmful substances therein and ensure that the sewage meets the environmental protection and safety standards. During the entire treatment process, the tail gas monitoring and control module monitors the tail gas components in real time, and automatically adjusts the treatment parameters according to the monitoring results to ensure the best tail gas treatment effect.

[0021] The tail gas collection module is composed of a tail gas collection pipeline and a tail gas collection tank, the neutralization corrosion inhibitor pre-filming module is composed of a corrosion inhibitor storage tank, a corrosion inhibitor injection pump, and a corrosion inhibitor injector, the desalted water spray module is composed of a desalted water storage tank, a desalted water spray pump, and a spray head, the sewage sedimentation and separation module is composed of a sedimentation tank and a separator, the acidic water stripping module is composed of a stripping tower, a condenser, and a reboiler, and the tail gas monitoring and control module is composed of a tail gas analyzer, a sensor, and a control system;

[0022] During the exhaust gas collection stage, the exhaust gas collection pipeline guides the sulfur-containing and salt-containing exhaust gas into the exhaust gas collection tank in preparation for subsequent treatment. Subsequently, the neutralization corrosion inhibitor pre-filming module starts working, and the corrosion inhibitor in the corrosion inhibitor storage tank is transported to the ejector through the injection pump and sprayed onto the inner wall of the exhaust pipe to form a protective film to effectively prevent corrosion. Next, the desalted water spraying module is started, and the desalted water in the desalted water storage tank is pressurized by the spray pump and evenly sprayed onto the surface of the equipment through the spray head to dissolve the salt and desulfurize. The treated sewage enters the sewage sedimentation and separation module, and solid-liquid separation is carried out in the sedimentation tank. Finally, the acidic water stripping module uses a stripping tower, a condenser and a reboiler to deeply treat the sewage and remove harmful substances. The entire treatment process is monitored and adjusted in real time by the exhaust gas monitoring and control module to ensure the best treatment effect.

[0023] It also includes an energy recovery module, which is responsible for recovering heat energy or pressure energy from the treatment process and converting it into a usable energy form. The energy recovery module also includes an energy storage device, which is used to store the recovered heat energy or electrical energy. The energy recovery module is a key part of the system. It can recover heat energy or pressure energy from the exhaust gas treatment process and convert it into a usable form such as electrical energy or heat energy through a conversion device. At the same time, the equipped energy storage device can store the recovered energy, achieve efficient utilization and conservation of energy, reduce system energy consumption, and improve economic benefits.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sulfur-containing and salt-containing tail gas treatment system, comprising: Tail gas collection module, which is responsible for collecting tail gas containing a large amount of sulfur-containing or salt-containing substances, concentrating them and transporting them to the subsequent processing module; neutralization corrosion inhibitor pre-filming module, which processes the sulfur-containing substances in the tail gas, and forms a protective film on the inner wall of the pipeline by injecting neutralization corrosion inhibitor to prevent the corrosion of the pipeline by sulfur-containing substances; the desalted water spraying module is used to dissolve the salt-containing substances on the equipment, and dissolve the salt attached to the running parts of the equipment by spraying desalted water, and at the same time, desulfurization is carried out by utilizing the property of sulfur-containing substances being soluble in water; The sewage sedimentation and separation module performs sedimentation and separation on the sewage after the desalted water spray treatment, and separates the sulfur and salt substances in the sewage for subsequent treatment.

2. A sulfur-containing and salt-containing tail gas treatment system according to claim 1, characterized in that: It also includes an acidic water stripping module, which processes the sewage after sedimentation and separation to remove harmful substances such as sulfur and salt therein to meet environmental protection and safety requirements, and an exhaust gas monitoring and control module, which monitors the concentration of sulfur-containing and salt-containing substances in the exhaust gas in real time, and automatically adjusts the injection amount of the neutralizing corrosion inhibitor and the spraying amount of the desalted water according to the monitoring results.

3. A sulfur-containing and salt-containing tail gas treatment system according to claim 1, characterized in that: The tail gas collection module consists of a tail gas collection pipeline and a tail gas collection tank; the neutralization corrosion inhibitor pre-filming module consists of a corrosion inhibitor storage tank, a corrosion inhibitor injection pump, and a corrosion inhibitor injector; the desalted water spray module consists of a desalted water storage tank, a desalted water spray pump, and a spray head; and the sewage sedimentation and separation module consists of a sedimentation tank and a separator.

4. A sulfur-containing and salt-containing tail gas treatment system according to claim 1, characterized in that: The acidic water stripping module is composed of a stripping tower, a condenser, and a reboiler, and the tail gas monitoring and control module is composed of a tail gas analyzer, a sensor, and a control system.

5. A sulfur-containing and salt-containing tail gas treatment system according to claim 1, characterized in that: Also included is an energy recovery module responsible for recovering heat or pressure energy from the process and converting it into a usable energy form.

6. A sulfur-containing and salt-containing tail gas treatment system according to claim 1, characterized in that: The energy recovery module also includes an energy storage device, which is used to store the recovered thermal energy or electrical energy.

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