Tail gas emission system for charcoal kiln

Abstract

The utility model provides a tail gas emission system for a charcoal kiln, which comprises a first tail gas emission pipe, a second tail gas emission pipe and a second charcoal kiln, one end of the second tail gas discharge pipe is communicated with a second charcoal kiln, and the other end of the second tail gas discharge pipe is communicated with the first tail gas discharge pipe; one end of each third tail gas exhaust pipe communicates with a third charcoal kiln, and the other end of each third tail gas exhaust pipe communicates with the second tail gas exhaust pipe in sequence; a tail gas inlet of the chimney is communicated with one end, far away from the first charcoal kiln, of the first tail gas discharge pipe, and the chimney is used for discharging tail gas discharged by the first charcoal kiln, the second charcoal kiln and the plurality of third charcoal kilns from tail gas outlets of the first tail gas discharge pipe through the first tail gas discharge pipe. The tail gas generated by the multiple charcoal kilns is discharged in a concentrated mode through one chimney, the tail gas discharging dispersity and the pollution risk to the atmospheric environment are reduced, and the concentrated treatment capacity of waste gas treatment facilities and the treatment efficiency of a factory on the tail gas discharged by the multiple charcoal kilns are improved.

Description

Technical Field

[0001] This application relates to the field of exhaust gas emission technology, and in particular to an exhaust gas emission system for a charcoal kiln. Background Technology

[0002] A charcoal kiln is a device or tool used for burning charcoal; it's also called an earthen kiln, similar to a brick kiln. Kilns come in many forms and structures, some dug on-site and built with soil, others constructed with bricks and cement. There are also single kilns and multi-unit kilns. Coal is produced by burning charcoal in the kiln. To ensure output, multiple kilns are typically used, each with its own chimney to exhaust the exhaust gases.

[0003] However, with the continuous strengthening of environmental protection policies and the increasing public concern about environmental pollution, the environmental protection requirements for factories by the government and society are becoming increasingly stringent. The setup of multiple chimneys corresponding to multiple charcoal kilns processing the same type of charcoal in a factory leads to increased dispersion of exhaust gas emissions, thereby increasing the impact of pollutants on the surrounding environment. This makes it non-compliant with the requirements of section 7.1 of the "Technical Specification for Prevention and Treatment of Waste Gas Pollution," and also hinders the unified treatment and testing of exhaust gases from multiple charcoal kilns, resulting in high costs for exhaust gas treatment and testing. Based on this, this application proposes an exhaust gas emission system for charcoal kilns. Utility Model Content

[0004] This application provides a tail gas emission system for a charcoal kiln to solve the technical problems described in the background art above.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0006] This application provides a tail gas emission system for a charcoal kiln, comprising:

[0007] The first exhaust pipe, one end of which is connected to the first charcoal kiln;

[0008] The second exhaust pipe has one end connected to the second charcoal kiln and the other end connected to the first exhaust pipe.

[0009] Multiple third exhaust pipes, one end of each of the multiple third exhaust pipes is connected to a third coal kiln, and the other end of each is sequentially connected to the second exhaust pipe;

[0010] The chimney has its exhaust gas inlet connected to the end of the first exhaust gas discharge pipe furthest from the first charcoal kiln, and is used to discharge the exhaust gas from the first charcoal kiln, the second charcoal kiln, and the plurality of third charcoal kilns through the first exhaust gas discharge pipe from its exhaust gas outlet.

[0011] Optionally, the diameter of the second exhaust pipe is larger than the diameter of the third exhaust pipe and smaller than the diameter of the first exhaust pipe.

[0012] Optionally, the second exhaust pipe includes a first pipe section, a second pipe section, and a third pipe section;

[0013] One end of the first pipe section is connected to the exhaust gas outlet of the second charcoal kiln, the other end of the first pipe section is connected to one end of the second pipe section, the other end of the second pipe section is connected to one end of the third pipe section, and the other end of the third pipe section is connected to the first exhaust gas discharge pipe.

[0014] The diameter of the second pipe section is larger than that of the first pipe section, and its diameter gradually increases as it approaches the third pipe section. Multiple third exhaust pipes are sequentially connected to the third pipe section.

[0015] Optionally, the length of the third pipe segment is 10 to 15 times the length of the second pipe segment.

[0016] Optionally, a maintenance platform is installed at a predetermined distance from the bottom of the chimney, and an exhaust gas detection port is opened on the side wall above the maintenance platform of the chimney. A flue gas content detection device is installed on the maintenance platform, and the inlet pipe of the flue gas content detection device extends into the chimney from the exhaust gas detection port.

[0017] Optionally, a flue gas recirculation duct is provided on the side wall of the lower section of the chimney, and a drainage hole is provided at its bottom.

[0018] Optionally, the exhaust outlets of the first charcoal kiln, the second charcoal kiln, and the plurality of third charcoal kilns are all connected to a first pipe. The end of each first pipe away from its corresponding charcoal kiln is connected to the air inlet of a dust collector, and the air outlet of each dust collector is connected to the end of its corresponding exhaust pipe away from the charcoal kiln.

[0019] Optionally, each of the dust collectors has its outlet connected to a second pipe, and the end of the second pipe away from the dust collector is connected to an induced draft fan. The outlet of the induced draft fan is connected to the end of its corresponding exhaust pipe away from the charcoal kiln.

[0020] Optionally, each of the second pipes is equipped with an electric butterfly valve.

[0021] The exhaust gas emission system for charcoal kilns provided in this application connects the exhaust gas outlet of the first charcoal kiln and the exhaust gas inlet of the chimney at both ends of the first exhaust gas emission pipe. The exhaust gas from the second charcoal kiln is discharged into the first exhaust gas emission pipe through the second exhaust gas emission pipe, while the exhaust gas from multiple third charcoal kilns is discharged into the second exhaust gas emission pipe through its corresponding third exhaust gas emission pipe and then into the first exhaust gas emission pipe through the second exhaust gas emission pipe. This achieves the goal of centralized treatment and emission of exhaust gas from the first, second, and multiple third charcoal kilns by a single chimney. Compared with the existing system where multiple charcoal kilns correspond to multiple chimneys, this application's centralized emission of exhaust gas from multiple charcoal kilns through a single chimney not only reduces the dispersion of exhaust gas emissions and the risk of atmospheric pollution, but also improves the centralized treatment capacity of waste gas treatment facilities, thereby improving the plant's treatment efficiency for exhaust gas emitted from multiple charcoal kilns. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A flowchart of a tail gas emission system for a charcoal kiln provided in an embodiment of this application;

[0024] Figure 2 A flowchart of a tail gas emission system for a charcoal kiln provided in another embodiment of this application;

[0025] Figure 3 A top view of a tail gas emission system for a charcoal kiln provided in an embodiment of this application;

[0026] Figure 4 This is a cross-sectional view of a tail gas emission system for a charcoal kiln provided in an embodiment of this application;

[0027] Figure 5 This is a cross-sectional view of a tail gas emission system for a charcoal kiln provided in another embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the structure of a chimney provided in one embodiment of this application.

[0029] In the diagram: 100, First exhaust pipe; 101, First charcoal kiln; 200, Second exhaust pipe; 201, Second charcoal kiln; 202, First pipe section; 203, Second pipe section; 204, Third pipe section; 300, Third exhaust pipe; 301, Third charcoal kiln; 400, Chimney; 401, Maintenance platform; 402, Exhaust gas detection port; 403, Flue gas recirculation flue port; 404, Drain hole; 500, Flue gas content detection device; 600, First pipeline; 700, Dust collector; 800, Second pipeline; 801, Electric butterfly valve; 900, Exhaust fan. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0031] refer to Figures 1 to 6 This application provides a tail gas emission system for a charcoal kiln, comprising:

[0032] The first exhaust pipe 100 has one end connected to the first charcoal kiln 101, which is used to introduce the exhaust gas generated during the production process of the first charcoal kiln 101 into it, providing a channel for the exhaust gas generated by the first charcoal kiln 101 to be discharged.

[0033] The second exhaust pipe 200 has one end connected to the second charcoal kiln 201 and the other end connected to the first exhaust pipe 100. The exhaust gas generated during the production process of the second charcoal kiln 201 is discharged into the first exhaust pipe 201 through the second exhaust pipe 200 connected to it.

[0034] Multiple third exhaust pipes 300 are provided, one end of which is connected to a third charcoal kiln 301, and the other end of which is connected to a second exhaust pipe 200 in sequence. The exhaust gas generated by the multiple third charcoal kilns 301 is discharged into the second exhaust pipe 200 through the corresponding third exhaust pipe 300, and then enters the first exhaust pipe 100 through the second exhaust pipe 200.

[0035] Chimney 400 has its exhaust gas inlet connected to the end of the first exhaust gas discharge pipe 100 furthest from the first charcoal kiln 101. It is used to discharge the exhaust gases from the first charcoal kiln 101, the second charcoal kiln 201, and multiple third charcoal kilns 301 through the exhaust gas discharge pipe 100 from its exhaust gas outlet. By using a single chimney 400 to simultaneously and uniformly discharge the exhaust gases generated during the production process of the first charcoal kiln 101, the second charcoal kiln 201, and multiple third charcoal kilns 301, it not only reduces the dispersion of exhaust gas emissions and the risk of atmospheric pollution, but also improves the centralized treatment capacity of the waste gas treatment facilities, ensuring that they not only meet environmental protection requirements but also comply with the requirements of section 7.1 of the "Technical Specification for Prevention and Treatment of Waste Gas Pollution". In addition, the first charcoal kiln 101, the second charcoal kiln 201 and the multiple third charcoal kilns 301 are all used to process the same type of charcoal material, and their structures can be referred to in the existing charcoal kilns. Therefore, this application will not describe in detail the structure of the first charcoal kiln 101, the second charcoal kiln 201 and the multiple third charcoal kilns 301.

[0036] The exhaust gas system for charcoal kilns provided in this application connects the exhaust gas outlet of the first charcoal kiln 101 and the exhaust gas inlet of the chimney 400 at both ends of the first exhaust gas outlet pipe 100. The exhaust gas from the second charcoal kiln 201 is discharged into the first exhaust gas outlet pipe 100 via the second exhaust gas outlet pipe 200. Meanwhile, the exhaust gas from multiple third charcoal kilns 301 is discharged into the second exhaust gas outlet pipe 200 via its corresponding third exhaust gas outlet pipe 300, and then into the first exhaust gas outlet pipe 100 via the second exhaust gas outlet pipe 200, thereby achieving… This invention achieves the goal of centrally treating the exhaust gases generated by the first charcoal kiln 101, the second charcoal kiln 201, and multiple third charcoal kilns 301 before discharging them through a single chimney 400. Compared with the existing method of multiple chimneys 400 corresponding to multiple charcoal kilns, this application uses a single chimney 400 to centrally discharge the exhaust gases generated by multiple charcoal kilns. This not only reduces the dispersion of exhaust gas emissions and the risk of air pollution, but also improves the centralized treatment capacity of the waste gas treatment facilities, thereby improving the efficiency of the factory in treating the exhaust gases emitted from multiple charcoal kilns.

[0037] In some embodiments, the diameter of the second exhaust pipe 200 in this application is larger than the diameter of the third exhaust pipe 300 and smaller than the diameter of the first exhaust pipe 100.

[0038] In the above embodiment, the exhaust gas from the second charcoal kiln 201 is discharged into the first exhaust gas discharge pipe 100 via the second exhaust gas discharge pipe 200 connected to it, while the exhaust gas from the multiple third charcoal kilns 301 is discharged into the first exhaust gas discharge pipe 100 sequentially via the multiple third exhaust gas discharge pipes 300 and the second exhaust gas discharge pipe 200 connected to it. That is to say, the exhaust gas from the multiple third charcoal kilns 301 must enter the second exhaust gas discharge pipe 200, and at the same time, the exhaust gas from the multiple second charcoal kilns 201 and the exhaust gas from the multiple third charcoal kilns 301 must enter the first exhaust gas discharge pipe 100. In addition, the first exhaust gas discharge pipe 100 must also accommodate the exhaust gas from the corresponding first charcoal kiln 101. That is, the exhaust gas flow rate of the first exhaust gas discharge pipe 100 is greater than the flow rate of the second exhaust gas discharge pipe 200, and the flow rate of the second exhaust gas discharge pipe 200 is greater than the flow rate of the third exhaust gas discharge pipe 300. Therefore, the diameter of the second exhaust pipe 200 in this application is larger than the diameter of the third exhaust pipe 300 and smaller than the diameter of the first exhaust pipe 100, which ensures the smooth operation of the exhaust gas emission process of the first charcoal kiln 101, the second charcoal kiln 201 and the multiple third charcoal kilns 301.

[0039] In some embodiments, reference Figure 4 The second exhaust pipe 200 in this application includes a first pipe section 202, a second pipe section 203, and a third pipe section 204. Specifically, one end of the first pipe section 202 is connected to the exhaust outlet of the second coal kiln 201, the other end of the first pipe section 202 is connected to one end of the second pipe section 203, the other end of the second pipe section 203 is connected to one end of the third pipe section 204, and the other end of the third pipe section 204 is connected to the first exhaust pipe 100. The diameter of the second pipe section 203 is larger than the diameter of the first pipe section 202, and its diameter gradually increases as it approaches the third pipe section 204. Multiple third exhaust pipes 300 are sequentially connected to the third pipe section 204.

[0040] In the above embodiment, the diameter of the second pipe section 203 is larger than that of the first pipe section 202, and its diameter gradually increases towards the third pipe section 204 because the first pipe section 202 carries the exhaust gas from the second charcoal kiln 201. The diameter of the second pipe section 203 gradually increases and connects to the third pipe section 204 because the third pipe section 204 carries the sum of the exhaust gas from the second charcoal kiln 201 and multiple third charcoal kilns 301. This results in the exhaust gas flow rate in the third pipe section 204 being greater than the flue gas flow rate in the first pipe section 202, thus ensuring the smoothness of the flue gas emission process. The specific values ​​of the pipe diameters of the first pipe section 202, the second pipe section 203, and the third pipe section 204 can be set according to actual needs, and this application does not impose specific limitations on them here.

[0041] In some embodiments, the length of the third pipe segment 204 in this application is 10 to 15 times the length of the second pipe segment 203. The second pipe segment 203 is provided so that the third pipe segment 204 can withstand the exhaust gas from the second charcoal kiln 201 and multiple third charcoal kilns 301. Since the third pipe segment 204 needs to accommodate the exhaust gas from the second charcoal kiln 201 and multiple third charcoal kilns 301, the greater length of the third pipe segment 204 than the second pipe segment 203 facilitates the connection of multiple third exhaust gas discharge pipes 300 to it. The specific values ​​of the lengths of the second pipe segment 203 and the third pipe segment 204 can be set according to actual needs; therefore, this application does not specifically limit them.

[0042] In some embodiments, reference Figure 6 In this application, a maintenance platform 401 is installed at a predetermined distance from the bottom of the chimney 400, and an exhaust gas detection port 402 is opened on the side wall above the maintenance platform 401. A flue gas content detection device 500 is installed on the maintenance platform 401, and the flue gas content detection device 500 extends into the chimney from the exhaust gas detection port 402.

[0043] In the above embodiments, the maintenance platform 401 facilitates maintenance and other operations on the chimney 400. Workers standing on the maintenance platform 401 extend the inlet pipe of the flue gas content detection device 500 into the chimney 400 through the exhaust gas detection port 402. This allows for the detection and analysis of the exhaust gases emitted from the first charcoal kiln 101, the second charcoal kiln 201, and multiple third charcoal kilns 301 within the chimney 400, providing real-time monitoring of the exhaust gas situation within the chimney 400. The flue gas content detection device 500 can specifically be a handheld flue gas detector, a laser scattering dust detector, a low-concentration automatic dust and flue gas comprehensive tester, or other special-purpose flue gas detection devices. The specific device can be configured according to actual needs, and this application does not impose any specific limitations on it.

[0044] In some embodiments, reference Figure 5 and Figure 6 In this application, a flue gas recirculation flue port 403 is provided on the side wall of the lower section of the chimney 400, and a drain hole 404 is provided at its bottom.

[0045] In the above embodiments, by setting up a flue gas recirculation duct inlet 403, part of the exhaust gas is reintroduced into the charcoal kiln to reduce the combustion temperature and oxygen concentration, thereby reducing NOx generation and improving the combustion efficiency and stability of the carbon materials in the charcoal kiln. Furthermore, since the exhaust gas generated during the production process of the first charcoal kiln 101, the second charcoal kiln 201, and multiple third charcoal kilns 301 is usually produced by the combustion of the carbon materials within them, resulting in a relatively high exhaust gas temperature and the presence of water vapor, the temperature of the exhaust gas gradually decreases as it diffuses, causing the water vapor in the exhaust gas to condense into water. The function of the drain hole 404 is to promptly discharge the condensed water from the exhaust gas, thus achieving gas-liquid separation.

[0046] In some embodiments, reference Figure 2 In this application, the exhaust gas outlets of the first charcoal kiln 101, the second charcoal kiln 201, and multiple third charcoal kilns 301 are all connected to a first pipe 600. The end of each first pipe 600 furthest from its corresponding charcoal kiln is connected to the inlet of a dust collector 700. The outlet of each dust collector 700 is connected to the end of its corresponding exhaust gas pipe furthest from the charcoal kiln. The dust collector 700 can be a bag filter or other type of dust collector, and its specific configuration can be determined according to actual needs; however, this application does not impose any specific limitations on it.

[0047] In the above embodiments, the dust collector 700 can remove dust from the exhaust gas outlets of the first charcoal kiln 101, the second charcoal kiln 201, and multiple third charcoal kilns 301, thereby removing particulate impurities from the exhaust gas emitted from the charcoal kilns. This not only prevents particulate impurities in the exhaust gas from clogging the pipes or adhering to the pipes and affecting the flow rate of the exhaust gas during the emission process, but also prevents particulate impurities in the exhaust gas from being emitted into the air and causing environmental pollution.

[0048] In some embodiments, reference Figure 2 and Figure 3 In this application, the outlet of each dust collector 700 is connected to a second pipe 800, and the end of the second pipe 800 away from the dust collector 700 is connected to an induced draft fan 900. The outlet of the induced draft fan 900 is connected to the end of its corresponding exhaust pipe away from the charcoal kiln. The specifications and model of the induced draft fan 900 can be set according to actual needs, and this application does not impose specific limitations on it.

[0049] In the above embodiments, the exhaust gas discharge power in the first charcoal kiln 101, the exhaust gas discharge power in the second charcoal kiln 201, and the exhaust gas discharge power in multiple third charcoal kilns 301 are provided by the induced draft fan 900, thereby ensuring that the exhaust gas discharge process of the charcoal kiln can proceed smoothly.

[0050] In some embodiments, reference Figure 2Each of the second pipes 800 in this application is equipped with an electric butterfly valve 801. The electric butterfly valve 801 can measure the flow rate of the exhaust gas discharged from the charcoal kiln after dust removal by the dust collector 700 and entering the induced draft fan 900, so as to grasp the flow rate of the exhaust gas discharged from the first charcoal kiln 101, the second charcoal kiln 201 and the multiple third charcoal kilns 301, thereby grasping the production status of the first charcoal kiln 101, the second charcoal kiln 201 and the multiple third charcoal kilns 301.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application 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 therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A tail gas emission system for a charcoal kiln, characterized in that, include: The first exhaust pipe (100) is connected to the first charcoal kiln (101) at one end. The second exhaust pipe (200) has one end connected to the second charcoal kiln (201) and the other end connected to the first exhaust pipe (100); Multiple third exhaust pipes (300), one end of each of the multiple third exhaust pipes (300) is connected to a third charcoal kiln (301), and the other end of each is connected to the second exhaust pipe (200) in sequence; Chimney (400), the exhaust gas inlet of which is connected to the end of the first exhaust gas discharge pipe (100) away from the first charcoal kiln (101), for discharging the exhaust gas discharged from the first charcoal kiln (101), the second charcoal kiln (201) and the plurality of third charcoal kilns (301) through the first exhaust gas discharge pipe (100) from its exhaust gas outlet.

2. The tail gas emission system for a charcoal kiln according to claim 1, characterized in that, The diameter of the second exhaust pipe (200) is larger than the diameter of the third exhaust pipe (300) and smaller than the diameter of the first exhaust pipe (100).

3. The exhaust gas system for a charcoal kiln according to claim 1, characterized in that, The second exhaust pipe (200) includes a first pipe section (202), a second pipe section (203) and a third pipe section (204); One end of the first pipe section (202) is connected to the exhaust gas outlet of the second charcoal kiln (201), the other end of the first pipe section (202) is connected to one end of the second pipe section (203), the other end of the second pipe section (203) is connected to one end of the third pipe section (204), and the other end of the third pipe section (204) is connected to the first exhaust gas discharge pipe (100). The diameter of the second pipe section (203) is larger than that of the first pipe section (202), and its diameter gradually increases as it approaches the third pipe section (204). Multiple third exhaust pipes (300) are sequentially connected to the third pipe section (204).

4. The tail gas emission system for a charcoal kiln according to claim 3, characterized in that, The length of the third pipe section (204) is 10 to 15 times the length of the second pipe section (203).

5. The exhaust gas emission system for a charcoal kiln according to claim 1, characterized in that, A maintenance platform (401) is installed at a predetermined distance from the bottom of the chimney (400), and an exhaust gas detection port (402) is opened on the side wall above the maintenance platform (401) of the chimney (400). A flue gas content detection device (500) is installed on the maintenance platform (401), and the flue gas content detection device (500) extends into the chimney (400) from the exhaust gas detection port (402).

6. The tail gas emission system for a charcoal kiln according to claim 1, characterized in that, The lower section of the chimney (400) has a flue gas recirculation flue port (403) on its side wall, and a drain hole (404) is provided at its bottom.

7. The exhaust gas emission system for a charcoal kiln according to any one of claims 1 to 6, characterized in that, The exhaust outlets of the first charcoal kiln (101), the second charcoal kiln (201) and the plurality of third charcoal kilns (301) are all connected to a first pipe (600). The end of each first pipe (600) away from its corresponding charcoal kiln is connected to the air inlet of a dust collector (700). The air outlet of each dust collector (700) is connected to the end of its corresponding exhaust pipe away from the charcoal kiln.

8. The tail gas emission system for a charcoal kiln according to claim 7, characterized in that, Each of the dust collectors (700) has an outlet connected to a second pipe (800), the end of the second pipe (800) away from the dust collector (700) is connected to an induced draft fan (900), and the outlet of the induced draft fan (900) is connected to the end of its corresponding exhaust pipe away from the charcoal kiln.

9. The tail gas emission system for a charcoal kiln according to claim 8, characterized in that, Each of the second pipes (800) is equipped with an electric butterfly valve (801).

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