Organosilicon high boiler conversion off-gas treatment apparatus

Abstract

The utility model discloses an organic silicon high boiler conversion tail gas treatment equipment, including tail gas water scrubbing tower, water washing circulating tank and water washing circulating pump, the middle part of tail gas water scrubbing tower is provided with tail gas pipeline, is provided with water distributor in tail gas water scrubbing tower inside, and the bottom of tail gas water scrubbing tower is provided with water washing circulating tank, and water washing circulating tank is connected with water washing buffer tank through pipeline, and water washing buffer tank is connected with water washing circulating pump through pipeline, and water washing circulating pump is connected with water distributor in tail gas water scrubbing tower through pipeline, and water washing circulating pump is connected with sewage treatment system through blowdown pipeline. Compared with prior art, the utility model discloses tail gas treatment equipment simple and easy to operate, and the organic silicon high boiler conversion tail gas is handled separately, solves the influence of tail gas entrainment hydrogen chloride to system tail gas main pipeline, and is suitable for industrial production.

Description

Technical Field

[0001] This utility model relates to the field of organosilicon high-boiling-point conversion technology, and in particular to an organosilicon high-boiling-point conversion tail gas treatment device. Background Technology

[0002] The production of organosilicon generates a large amount of difficult-to-handle high-boiling-point substances, which are highly irritating. These high-boiling-point substances are flammable, explosive, and volatile; when exposed to air, they will burn and react with water vapor to form a strong acid mist. Therefore, appropriate measures must be taken to treat these high-boiling-point substances to reduce environmental pollution and generate economic benefits. Currently, the treatment of organosilicon high-boiling-point substances mainly utilizes tri-n-butylamine and HCl to generate active catalytic centers. Under the action of these catalytic centers, the high-boiling-point substances react with HCl, decomposing them into usable organosilicon products.

[0003] Currently, both domestically and internationally, the common practice is to combine the high-boiling-point conversion tail gas with the tail gas from the organosilicon distillation process and then uniformly transport it to the tail gas incineration process for unified incineration treatment. However, the tail gas produced in the high-boiling-point conversion process has a high HCl content, which is highly corrosive to the tail gas transport pipelines and incineration equipment and cannot be burned. This increases the risk of equipment and pipeline damage and also leads to HCl emissions, which is detrimental to environmental protection.

[0004] Therefore, there is an urgent need for a process to solve the above problems, to separately treat the exhaust gas from the conversion of high-boiling-point organosilicon compounds, thereby reducing environmental pressure and equipment damage rate, and creating economic benefits. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a device for treating the tail gas of organosilicon high-boiling-point conversion.

[0006] To achieve this technical objective, the present invention adopts the following solution: A device for treating the tail gas from the conversion of high-boiling-point organosilicon compounds includes a tail gas scrubbing tower, a water scrubbing circulation tank, and a water scrubbing circulation pump. A tail gas pipeline is located in the middle of the tail gas scrubbing tower, and a water distributor is installed inside the tower. A water scrubbing circulation tank is located at the bottom of the tower, and is connected to a water scrubbing buffer tank via a pipeline. The buffer tank is connected to the water scrubbing circulation pump via a pipeline, and the pump is connected to the water distributor inside the tower via a pipeline. The pump is also connected to a wastewater treatment system via a sewage discharge pipeline.

[0007] Furthermore, water supply lines are installed on both the water washing circulation tank and the water washing buffer tank.

[0008] Furthermore, water distributors are installed at the top and middle of the exhaust gas washing tower, and both water distributors are connected to the water washing circulation pump.

[0009] Furthermore, a venting pipeline is installed at the top of the exhaust gas scrubbing tower, and the venting pipeline is equipped with a nitrogen protection pipeline.

[0010] Furthermore, the exhaust gas scrubbing tower is equipped with baffles inside, and has operating handholes and operator manholes on its surface.

[0011] Furthermore, the exhaust gas scrubbing tower has a three-section tower structure, and the three sections can be detachably connected.

[0012] Furthermore, two sets of parallel exhaust gas scrubbing towers and scrubbing circulation tanks are set up. Both scrubbing circulation tanks are connected to the scrubbing buffer tanks, and the scrubbing buffer tanks are connected to the two exhaust gas scrubbing towers respectively through the scrubbing circulation pumps.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) Taking advantage of the fact that the high-boiling-point conversion tail gas contains a large amount of HCl, and HCl is easily soluble in water, the entire set of fiberglass equipment and lined pipes can be used to treat the tail gas in a harmless manner without the risk of equipment damage or environmental risks, which is suitable for industrial production.

[0014] (2) The tail gas scrubbing tower contains two absorber water distributors and multiple baffles, as well as operating handholes and manholes, for contact absorption of the tail gas from the conversion of high-boiling-point organosilicon and for equipment cleaning. Furthermore, the tail gas scrubbing tower is disassembled and installed in sections, which is beneficial for maintenance work; at the same time, the top of the tail gas scrubbing tower is equipped with nitrogen protection for tail gas venting to prevent organosilicon tail gas from leaking out and causing safety accidents.

[0015] (3) By setting up a water washing buffer tank and a water washing circulation tank, the water washing buffer tank prevents the organosilicon hydrolysate generated by the reaction of high-boiling organosilicon tail gas with water in the tail gas circulation tank from directly contacting the inlet pipeline of the tail gas water washing pump, causing pipeline blockage and thus equipment damage. At the same time, the series and parallel design of the water washing tank extends the equipment maintenance cycle and service life, and can also cope with the situation of increased tail gas flow. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the tail gas treatment equipment for the conversion of high-boiling-point organic silicon compounds in an embodiment of this utility model.

[0017] The following are marked in the diagram: 1. Tail gas scrubbing tower; 2. Scrubbing circulation tank; 3. Scrubbing circulation pump; 4. Scrubbing buffer tank; 5. Baffle plate; 6. Water distributor; 7. Vent line; 8. Tail gas line; 9. Sewage line; 10. Water supply line. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0019] Please see Figure 1 This utility model provides a tail gas treatment device for the conversion of high-boiling-point organosilicon compounds, including a tail gas washing tower 1, a water washing circulation tank 2, a water washing circulation pump 3, and a water washing buffer tank 4. The tail gas washing tower 1 is used for the absorption of tail gas by water. A tail gas pipeline 8 is installed in the middle of the tail gas washing tower 1, which is connected to the tail gas from the conversion of high-boiling-point organosilicon compounds. A water washing circulation tank 2 is installed at the bottom of the tail gas washing tower 1 to collect the water after absorbing the tail gas. A venting pipeline 7 is installed at the top of the tail gas washing tower 1 to ensure the safety of venting during the process. The water washing circulation tank 2 is connected to the water washing buffer tank 4 through a pipeline. Both the water washing circulation tank 2 and the water washing buffer tank 4 are equipped with water supply pipelines 10. The water collected in the water washing circulation tank 2 enters the water washing buffer tank 4 to prevent the organosilicon hydrolysate generated by the reaction of the high-boiling-point organosilicon tail gas and water in the water washing circulation tank 2 from directly contacting the inlet pipeline of the water washing circulation pump 3, causing pipeline blockage and thus equipment damage. The washing buffer tank 4 is connected to the washing circulation pump 3 via a pipeline, and the washing circulation pump 3 is connected to the exhaust gas washing tower 1 via a pipeline. A water distributor 6 is installed at the top of the exhaust gas washing tower 1, and the water distributor 6 is connected to the outlet pipeline of the washing circulation pump 3. The washing circulation pump 3 is also connected to the sewage treatment system via a sewage discharge pipeline 9.

[0020] In one specific embodiment, water distributors 6 are provided at the top and middle of the exhaust gas washing tower 1 to improve the absorption effect of the exhaust gas. The water washing circulation pump 3 sends water from the water washing buffer tank 4 to the middle and top of the exhaust gas washing tower 1, and sprays it into the exhaust gas washing tower 1 through the water distributors 6. The water washing circulation tank 2 collects the water after absorbing the exhaust gas and then returns it to the water washing buffer tank 4 to achieve circulation.

[0021] In one specific embodiment, the exhaust gas scrubbing tower 1 is provided with multiple baffles 5 inside, which helps to improve the contact absorption of water with the high boiling point of organosilicon conversion exhaust gas. The exhaust gas scrubbing tower 1 is provided with five operating hand holes and two operating manholes for equipment cleaning and maintenance.

[0022] In one specific embodiment, the exhaust gas scrubbing tower 1 has a three-section tower structure, and the three sections are detachably connected to avoid the inconvenience caused by a one-piece tower equipment for equipment maintenance and replacement. The first section of the tower is connected to the water scrubbing circulation tank 2, the second section is the middle tower, and the third section connects the middle tower to the top of the tower. The top of the tower is equipped with a vent pipeline 7, which is equipped with a nitrogen protection pipeline to ensure the safety of venting during the process.

[0023] In one specific embodiment, two sets of parallel tail gas scrubbing towers 1 and scrubbing circulation tanks 2 are simultaneously provided. Both scrubbing circulation tanks 2 are connected to scrubbing buffer tanks 4, and the scrubbing buffer tanks 4 are connected to the two tail gas scrubbing towers 1 respectively through scrubbing circulation pumps 3. The purpose is to realize the switching and cleaning work of the entire tail gas scrubbing system, and at the same time, to deal with the tail gas treatment work when the entire organosilicon distillation system enters the tail gas scrubbing system and the tail gas volume increases.

[0024] The working process of this utility model's organosilicon high-boiling-point substance conversion tail gas treatment equipment is as follows: The high-boiling-point organic silicon conversion exhaust gas is delivered to the middle of the exhaust gas scrubbing tower 1 via exhaust gas pipeline 8. Water is added to the scrubbing circulation tank 2 and the scrubbing buffer tank 4. The scrubbing circulation pump 3 is started, sending the water in the scrubbing buffer tank 4 to the top and middle of the exhaust gas scrubbing tower 1. The water is then sprayed onto the exhaust gas through the water distributor 6. The water after absorbing the exhaust gas enters the scrubbing circulation tank 2 and then returns to the scrubbing buffer tank 4 through the pipeline. Water is periodically added to the scrubbing circulation tank 2 and the scrubbing buffer tank 4 via the water supply pipeline 10, and the water after absorbing the exhaust gas is discharged through the drain pipeline 9 to change the water in the system and prevent the water from becoming saturated with hydrogen chloride and unable to absorb the exhaust gas.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. If these modifications and variations fall within the scope of the claims of this utility model and their equivalents, they should be considered to be within the protection scope of this utility model.

Claims

1. A device for treating tail gas from the conversion of high-boiling-point organosilicon compounds, comprising a tail gas scrubbing tower (1), a scrubbing circulation tank (2), and a scrubbing circulation pump (3), characterized in that, A tail gas pipeline (8) is installed in the middle of the tail gas water washing tower (1). A water distributor (6) is installed inside the tail gas water washing tower (1). A water washing circulation tank (2) is installed at the bottom of the tail gas water washing tower (1). The water washing circulation tank (2) is connected to a water washing buffer tank (4) through a pipeline. The water washing buffer tank (4) is connected to a water washing circulation pump (3) through a pipeline. The water washing circulation pump (3) is connected to the water distributor (6) inside the tail gas water washing tower (1) through a pipeline. The water washing circulation pump (3) is also connected to the sewage treatment system through a sewage discharge pipeline (9).

2. The organosilicon high-boiling-point conversion tail gas treatment equipment according to claim 1, characterized in that, Water supply lines (10) are installed on both the water washing circulation tank (2) and the water washing buffer tank (4).

3. The organosilicon high-boiling-point substance conversion tail gas treatment equipment according to claim 1, characterized in that, Water distributors (6) are installed at the top and middle of the exhaust gas washing tower (1), and both water distributors (6) are connected to the water washing circulation pump (3).

4. The organosilicon high-boiling-point conversion tail gas treatment equipment according to claim 1, characterized in that, The top of the exhaust gas scrubbing tower (1) is equipped with a venting pipeline (7), and the venting pipeline (7) is equipped with a nitrogen protection pipeline.

5. The organosilicon high-boiling-point substance conversion tail gas treatment equipment according to claim 1, characterized in that, The exhaust gas scrubbing tower (1) is equipped with baffles (5) inside, and has an operating hand hole and an operating manhole.

6. The organosilicon high-boiling-point substance conversion tail gas treatment equipment according to claim 1, characterized in that, The exhaust gas washing tower (1) has a three-section tower structure, and the three sections can be detachably connected.

7. The organosilicon high-boiling-point substance conversion tail gas treatment equipment according to claim 1, characterized in that, Two sets of parallel tail gas washing towers (1) and washing circulation tanks (2) are set up. Both washing circulation tanks (2) are connected to washing buffer tanks (4). The washing buffer tanks (4) are connected to the two tail gas washing towers (1) respectively through washing circulation pumps (3).

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