Multi-component organic waste gas treatment system for silane-containing waste gas

Abstract

The utility model discloses a multi-component organic waste gas treatment system containing silane waste gas, which relates to the field of waste gas treatment, and comprises a silane waste gas pipeline and other waste gas pipelines, the silane waste gas pipeline is connected with a direct combustion type incineration device, and the direct combustion type incineration device sequentially comprises a combustion chamber, a heat exchanger, an ash bucket and a water seal tank from top to bottom. The bottom of the ash hopper is connected to the inner bottom of the water seal tank through a straight pipe, an air outlet is formed in the top of the water seal tank and sequentially connected with an air mixing box, a heat storage type incinerator, a spray tower, an induced draft fan and a chimney through pipelines, and other waste gas pipelines are connected to the air mixing box. According to the utility model, by combining the direct combustion type incineration process and the heat storage type incineration process, the efficient treatment of the multi-component waste gas containing the silane waste gas is realized, the treatment efficiency is high, the effect is good, the blockage of the heat storage body caused by the silane waste gas can be prevented, and the combustion energy consumption is greatly saved.

Description

Technical Field

[0001] The utility model relates to the field of waste gas treatment, in particular to a multi-component organic waste gas treatment system containing silane waste gas. Background Art

[0002] At present, incineration has been widely used as one of the means of treating organic waste gas. The incinerator structures generally used in the incineration method mainly include direct-fired incinerators and thermal storage incinerators. From the perspective of processing capacity and energy consumption, direct-fired incinerators generally operate at lower temperatures, and it is difficult to increase the furnace temperature to above 760°C, which will lead to incomplete oxidation and decomposition of organic matter. It cannot maintain high temperature when not ignited, and continuous ignition is required to maintain combustion, which leads to higher fuel consumption; while the thermal storage incinerator has a higher furnace heat, which can reach 800°C to 900°C, and is more efficient in treating organic waste gas. Moreover, under the action of the heat storage body, the fuel consumption is relatively small, so it has more advantages in treating large-scale industrial waste gas projects.

[0003] Currently in the field of battery production, due to the different types of waste gas generated during the production process in different plant areas, silane waste gas is generated during the production of polysilicon using the silane method, while other plant areas generate acid, alkali, organic and other waste gases. For the combustion treatment of these waste gases, if a regenerative incineration process is used, since the silane waste gas will carry a large amount of silicon powder, silicon dioxide and other dust during the combustion process, it is easy to cause blockage in the heat storage body, affecting the overall combustion efficiency and effect; however, if a single direct-fired incinerator is used, there is a problem of incomplete decomposition. At the same time, the waste gas treatment capacity of the direct-fired incinerator is limited, and it is only suitable for small-scale treatment needs, and cannot meet the requirements for the simultaneous treatment of silane waste gas and other organic waste gases such as acid and alkali waste gas.

[0004] Therefore, how to efficiently combine direct combustion and thermal storage incineration processes to treat multi-component waste gas containing silane waste gas is a problem that needs to be solved in this application. Summary of the Invention

[0005] The purpose of this utility model is to overcome the shortcomings of the above-mentioned technology and provide a multi-component organic waste gas treatment system containing silane waste gas. By combining direct-fired incineration and thermal storage incineration processes, efficient treatment of multi-component waste gas containing silane waste gas is achieved, with high treatment efficiency and good effect. It can prevent silane waste gas from causing blockage of the thermal storage body and greatly save combustion energy consumption.

[0006] In order to achieve the above-mentioned purpose of the utility model, the technical solution adopted by the utility model is:

[0007] and a tube connecting the discharging fan and the regulating female to form a direct-fired power supply. The tube connecting the discharging fan and the regulating female to form a direct-fired power supply. The tube connecting the discharging fan and the regulating female to form a direct-fired power supply.

[0008] A further improvement of the present invention is that the heat exchanger is a shell and tube heat exchanger.

[0009] A further improvement of the present invention is that an ultrasonic vibrator is provided on the outer wall of the heat exchanger, and the ultrasonic vibrator is activated when the dust generated during the combustion of the silane waste gas falls along the heat exchanger to prevent the dust from sticking to the wall and causing blockage.

[0010] A further improvement of the present utility model is that a filter plate is provided in the water seal box, the filter plate is located above the bottom end of the straight pipe, and the straight pipe is in a state of passing through the filter plate. The water seal box is provided with a water inlet, a water outlet and a slag discharge port. The water inlet and the water outlet are located above the filter plate, and the slag discharge port is located at the bottom of the water seal box. The waste gas containing dust enters the water seal box to achieve cooling of the waste gas and interception of the dust. The dust is mixed with water to achieve dust interception. After running for a period of time, the slag discharge port is opened to drain the dirty water, and new water is added through the water inlet and the water outlet.

[0011] A further improvement of the present invention is that the ash hopper is a conical structure that is wide at the top and narrow at the bottom.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model pre-combusts the silane waste gas, and the generated dust is intercepted by a water seal box, while cooling the waste gas. In addition, the burned silane waste gas exchanges heat with the combustion air and natural gas, preheating the combustion air and natural gas, improving the combustion effect of the waste gas and reducing energy consumption.

[0014] 2. Using a regenerative incinerator to treat other organic waste gases and pre-treated silane waste gases can treat waste gases more thoroughly, consume less energy, and be more adaptable to large-scale waste gas treatment compared to single direct-fired incineration.

[0015] 3. By directly burning the silane waste gas before the thermal storage incineration treatment, the blockage of the heat storage body by dust can be effectively prevented. At the same time, direct burning incineration is not easy to cause equipment blockage. Although the treatment effect of the waste gas will not be too thorough, the combination of subsequent thermal storage incineration treatment can achieve thorough incineration and clean treatment of the waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the present utility model.

[0017] In the figure: silane waste gas pipeline 1, other waste gas pipelines 2, combustion chamber 3, heat exchanger 4, ash hopper 5, water seal box 6, burner 7, first medium air inlet end 8, first medium air outlet end 9, second medium air inlet end 10, natural gas transmission pipeline 11, oxygen supplement fan 12, second medium air outlet end 13, straight pipe 14, air outlet 15, air mixing box 16, regenerative incinerator 17, spray tower 18, induced draft fan 19, chimney 20, ultrasonic vibrator 21, filter plate 22, water inlet 23, water outlet 24, slag discharge port 25, direct-fired incineration device 26. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0019] like Figure 1 As shown, a multi-component organic waste gas treatment system containing silane waste gas includes a silane waste gas pipeline 1 and other waste gas pipelines 2. The silane waste gas pipeline 1 is connected to a direct-fired incineration device 26. The direct-fired incineration device 26 includes a combustion chamber 3, a heat exchanger 4, an ash hopper 5 and a water seal box 6 from top to bottom. The combustion chamber 3 is connected to the silane waste gas pipeline 1, and a burner 7 is provided in the combustion chamber 3; the first medium air inlet end 8 of the heat exchanger 4 is connected to the combustion chamber 3, the first medium air outlet end 9 of the heat exchanger 4 is connected to the ash hopper 5, and the heat exchanger 4 is connected to the ash hopper 5. The second medium air inlet end 10 is respectively connected to the natural gas transmission pipeline 11 and the oxygen supplement fan 12, and the second medium air outlet end 13 of the heat exchanger 4 is connected to the combustion chamber 3 through a pipeline; the bottom of the ash hopper 5 is connected to the bottom of the water seal box 6 through a straight pipe 14, and the water level line in the water seal box 6 is higher than the bottom end of the straight pipe 14. The top of the water seal box 6 is provided with an air outlet 15, and the air outlet 15 is sequentially connected to the air mixing box 16, the thermal incinerator 17, the spray tower 18, the induced draft fan 19 and the chimney 20 through pipelines, and other exhaust gas pipelines 2 are connected to the air mixing box 16.

[0020] Specifically, the heat exchanger 4 is a shell-and-tube heat exchanger.

[0021] Specifically, an ultrasonic vibrator 21 is provided on the outer wall of the heat exchanger 4 , and the ultrasonic vibrator 21 is activated when the dust generated during the combustion of the silane waste gas falls along the heat exchanger 4 to prevent the dust from adhering to the wall and causing blockage.

[0022] Specifically, a layer of filter plate 22 is provided in the water seal box 6, and the filter plate 22 is located above the bottom end of the straight pipe 14. The straight pipe 14 is in a state of passing through the filter plate 22. A water inlet 23, a water outlet 24 and a slag discharge port 25 are provided on the water seal box 6. The water inlet 23 and the water outlet 24 are located above the filter plate 22, and the slag discharge port 25 is located at the bottom of the water seal box 6. The waste gas containing dust enters the water seal box 6 to cool the waste gas and intercept the dust. The dust is mixed with water to intercept the dust. After running for a period of time, the slag discharge port 25 is opened to drain the dirty water, and new water is added through the water inlet 23 and the water outlet 24.

[0023] Specifically, the ash hopper 5 is a conical structure that is wide at the top and narrow at the bottom.

[0024] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limiting the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A multi-component organic waste gas treatment system containing silane waste gas, comprising a silane waste gas pipeline and other waste gas pipelines, characterized in that: The silane waste gas pipeline is connected to the direct-fired incineration device, which includes a combustion chamber, a heat exchanger, an ash hopper and a water seal box from top to bottom. The combustion chamber is connected to the silane waste gas pipeline, and a burner is arranged in the combustion chamber; the first medium air inlet end of the heat exchanger is connected to the combustion chamber, the first medium air outlet end of the heat exchanger is connected to the ash hopper, the second medium air inlet end of the heat exchanger is respectively connected to the natural gas pipeline and the oxygen supplement fan, and the second medium air outlet end of the heat exchanger is connected to the combustion chamber through a pipeline; the bottom of the ash hopper is connected to the bottom of the water seal box through a straight pipe, the water level line in the water seal box is higher than the bottom end of the straight pipe, and the top of the water seal box is provided with an air outlet, and the air outlet is sequentially connected to a mixing box, a thermal incinerator, a spray tower, an induced draft fan and a chimney through a pipeline, and the other waste gas pipelines are connected to the mixing box.

2. A multi-component organic waste gas treatment system for silane-containing waste gas according to claim 1, characterized in that: The heat exchanger is a shell and tube heat exchanger.

3. The multi-component organic waste gas treatment system for silane-containing waste gas according to claim 1, characterized in that: An ultrasonic vibrator is arranged on the outer wall of the heat exchanger.

4. The multi-component organic waste gas treatment system for silane-containing waste gas according to claim 1, characterized in that: A filter plate is provided in the water seal box, and the filter plate is located above the bottom end of the straight pipe. The straight pipe is in a state of passing through the filter plate. The water seal box is provided with a water inlet, a water outlet and a slag discharge port. The water inlet and the water outlet are located above the filter plate, and the slag discharge port is located at the bottom of the water seal box.

5. The multi-component organic waste gas treatment system for silane-containing waste gas according to claim 1, characterized in that: The ash hopper is a conical structure that is wide at the top and narrow at the bottom.

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