A tail gas treatment furnace containing tar coal powder

Abstract

A tail gas treatment furnace containing tarry coal powder, involving the technical field of tail gas treatment equipment, solves the technical deficiencies of the existing equipment that the carbonized tail gas delivery pipeline is easily blocked and dust particles are easily deposited in the downstream boiler. The adopted technical solution includes: a furnace body, a heat storage body is provided in the middle of its inner cavity, and a plurality of Venturi-type channels and tail gas straight channels are provided through the heat storage body, which are connected to the gas collecting chamber and the mixing chamber. The two ends of the furnace body are provided with an air inlet pipe and an air outlet pipe respectively connected to the gas collecting chamber and the mixing chamber. The furnace body is provided with a combustion-supporting gas pipeline extending from the gas collecting chamber to the throat of the Venturi-type pipeline and a burner extending from the heat storage body to the Venturi-type pipeline. The present invention removes tar and coal powder in the Venturi-type pipeline by oxidation of combustion-supporting gas, and further heats the tail gas by oxidation heat release and heat storage body, thereby reducing a large number of dust particles from entering the downstream process, avoiding the clogging of the pipeline due to condensation of tar in the tail gas, and realizing the safe, stable and long-term operation of the activated carbon preparation device.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment equipment in activated carbon production, and more specifically to a tail gas treatment device capable of pre-treating part of tar and coal powder in the tail gas before the tail gas is sent into an incinerator for incineration. Background Art

[0002] During the preparation of activated carbon, the exhaust gas from the carbonization furnace contains a large amount of combustible gas. If it is directly discharged, it will not only cause air pollution, but also cause waste of combustible gas. The usual practice is to introduce these combustible carbonization exhaust gases into an incinerator for combustion to utilize the heat energy generated by the combustion, consume the combustible gas in it, and then discharge the exhaust gas.

[0003] The combustible components contained in the carbonized tail gas mainly include tar and coal powder, which are gasified at about 300°C. The transportation pipeline for introducing the carbonized tail gas into the subsequent incinerator is relatively long. During the tail gas transportation process, if the temperature drops below the boiling point of tar, the tar in the tail gas will condense in the pipeline. At the same time, the coal powder will constantly meet the low-temperature pipeline and condense on the pipe wall, which will eventually cause the pipeline to be blocked quickly. In addition, the coal powder in the carbonized tail gas cannot be completely burned after entering the incinerator, causing a large amount of dust particles to enter the subsequent process. After a period of time, the coal powder will be deposited in the waste heat boiler, which will eventually cause the boiler to be unable to operate and there is a risk of explosion. Summary of the invention

[0004] In summary, the purpose of the present invention is to provide a method for pre-oxidizing part of the tar and coal powder in the carbonized exhaust gas before it enters the incinerator, and to increase the conveying temperature of the exhaust gas, thereby solving the problems existing in the prior art of blockage of the conveying pipeline, incomplete incineration of coal powder, and a large amount of deposited dust particles in the subsequent process.

[0005] In order to solve the technical deficiencies proposed by the present invention, the technical solution adopted is a tail gas treatment furnace containing tar coal powder, characterized in that it includes:

[0006] The furnace body is provided with a heat storage body which divides its inner cavity into a gas collecting chamber and a mixing chamber, and the two ends of the furnace body are provided with an air inlet pipe and an air outlet pipe which are respectively connected to the gas collecting chamber and the mixing chamber and are used for inputting and discharging carbonized tail gas;

[0007] A plurality of Venturi-type channels are provided through the heat storage body and are used to introduce part of the carbonized tail gas in the gas collecting chamber into the mixing chamber through the heat storage body;

[0008] A plurality of combustion-supporting gas pipelines are arranged on the furnace body and extend to the throat of the Venturi-type channel through the gas collecting chamber respectively, so as to introduce the combustion-supporting gas;

[0009] A plurality of burners are arranged on the furnace body and extend to the venturi-type passages through the heat storage bodies respectively, and are used to heat the heat storage bodies and oxidize the tar and coal powder in the carbonized tail gas in the venturi-type passages through the combustion-supporting gas;

[0010] A plurality of tail gas straight channels are arranged through the heat storage body and evenly distributed around the Venturi type channel, and are used to introduce the remaining carbonized tail gas in the gas collecting chamber into the mixing chamber through the heat storage body.

[0011] Furthermore, the furnace body is a vertical structure, the gas collecting chamber is located at the upper end of its inner cavity, the mixing chamber is located at the lower end of its inner cavity, and the Venturi-type channel and the exhaust gas straight channel are both vertically evenly distributed on the heat storage body.

[0012] Furthermore, the processing furnace also includes:

[0013] A waste collection chamber is provided at the lower end of the mixing chamber and is connected thereto, and is a funnel-shaped structure for collecting ash and slag settled in the mixing chamber;

[0014] The waste discharge port is arranged at the bottom of the furnace body and is connected with the waste collection chamber, and is used for draining the collected ash and slag.

[0015] Furthermore, the waste outlet is provided with an openable and closable waste cover plate or waste valve.

[0016] Furthermore, the Venturi-type channel includes a contraction section, a throat and a diffusion section, the contraction section is connected to the air collecting chamber, the diffusion section is connected to the mixing chamber, and the throat is close to one side of the contraction section.

[0017] Furthermore, the combustion-supporting gas pipelines extend axially to the throat through the gas collecting chamber and the contraction section in a one-to-one correspondence, and the ends thereof extending to the throat are in a contracted and gathered tip structure.

[0018] Furthermore, the burners are detachably connected to the side walls of the furnace body, and radially extend to the diffusion section in the middle of the Venturi-type channel through the heat storage bodies in a one-to-one correspondence.

[0019] Furthermore, the processing furnace also includes:

[0020] A maintenance entrance is provided at one end of the furnace body and communicates with the gas collecting chamber;

[0021] The inlet cover is installed on the inspection inlet in an openable and closable manner to block the gas collecting chamber, and the combustion-aiding gas pipeline is fixedly arranged on the main body through the inlet cover.

[0022] Furthermore, the exhaust gas straight channel is a cylindrical channel, and its inner diameter and number are based on the exhaust gas throughput per unit time being greater than the exhaust gas throughput of the Venturi channel.

[0023] Furthermore, the Venturi-type channel and the exhaust gas straight channel are both made of the material of the heat storage body by die-casting or extrusion molding.

[0024] The present invention utilizes a burner to heat the heat storage body, and utilizes a combustion-supporting gas pipeline extending from a gas collecting chamber to the throat of a venturi-type channel to introduce a combustion-supporting gas into the venturi-type channel. When the combustion-supporting gas flows through the throat at high speed, a certain negative pressure will be formed at the entrance, thereby prompting part of the carbonized tail gas in the gas collecting chamber to be sucked into the venturi-type channel at high speed and fully mixed with the introduced combustion-supporting gas. The heat storage body itself is heated by the burner, and the high temperature will prompt the combustion-supporting gas entering through the combustion-supporting gas pipeline to undergo an oxidation reaction with the tar and coal powder in the carbonized tail gas, thereby oxidizing the tar and coal powder in the part of the combustible carbonized tail gas. A part of the heat generated by the oxidation continues to heat the heat storage body, and a part of it is introduced into the mixing chamber through the venturi-type channel to continue to heat the carbonized tail gas mixed in the mixing chamber and discharged through the tail gas straight channel and the venturi-type channel. The carbonized tail gas mixed in the mixing chamber is further heated and introduced into the incinerator of the subsequent process through the gas outlet pipeline for combustion.

[0025] The beneficial effects of the present invention are:

[0026] 1. The treatment furnace of the present invention can oxidize the tar and coal powder in the carbonized tail gas in the Venturi type channel through the combustion-supporting gas introduced by the combustion-supporting gas pipeline, so that before the carbonized tail gas is introduced into the incinerator of the subsequent process, part of the tar and coal powder in the carbonized tail gas is oxidized and removed, which significantly reduces the amount of dust particles entering the subsequent process, avoids the deposition of coal powder in the subsequent waste heat boiler, prevents the occurrence of abnormal accidents such as boiler failure and explosion caused by coal powder deposition, and improves the safety and reliability of carbonized tail gas treatment.

[0027] 2. The treatment furnace of the present invention can continue to heat the heat storage body through the Venturi-type channel by utilizing the heat generated by the oxidation reaction between the combustion-supporting gas and the tar and pulverized coal in the carbonized tail gas in the channel, thereby promoting the oxidation reaction and increasing the temperature of the carbonized tail gas in the tail gas straight channel. The heat generated by the oxidation reaction and the temperature of the heat storage body itself can be combined to continue to heat the mixed carbonized tail gas in the mixing chamber, thereby increasing the temperature of the carbonized tail gas discharged through the outlet pipe, effectively solving the problem of pipeline blockage caused by the condensation of tar and pulverized coal in the pipeline due to the low temperature of the carbonized tail gas, and ensuring the continuity and reliability of the carbonized tail gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the processing furnace of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some specific embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 It is a schematic diagram of the overall structure of the treatment furnace of the present invention;

[0030] Figure 2 It is a schematic diagram of the overall structure of the treatment furnace of the present invention;

[0031] Figure 3 It is a cross-sectional view of the overall structure of the processing furnace of the present invention.

[0032] In the figure: 1. furnace body, 11. gas collecting chamber, 12. mixing chamber, 13. waste collecting chamber, 14. waste outlet, 15. waste outlet cover, 16. first fixing hole, 17. burner fixing tube, 171. third connecting flange, 18. maintenance entrance, 19. entrance cover, 2. heat storage body, 21. Venturi channel, 211. throat, 212. contraction section, 213. diffusion section, 22. exhaust gas straight channel, 23. first fixed channel, 3. combustion-supporting gas pipeline, 31. first connecting flange, 4. burner, 41. flame nozzle, 42. automatic ignition control device, 43. mixing pressure regulating device, 44. gas connector, 45. oxygen connector, 46. second connecting flange, 5. air inlet pipeline, 6. air outlet pipeline. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiment of the treatment furnace of the present invention to clearly and completely describe the technical solution of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0034] It should be understood that in the description of the present invention, the orientations or positional relationships indicated by the terms "two ends", "around", "upper end", "lower end", "one side", "top", "bottom" and "side wall" are based on the orientations and positional relationships shown in the accompanying drawings, and are only for the convenience of describing the structure and operation of the processing furnace of the present invention, rather than indicating or implying that the referred to parts must have a specific orientation or operate in a specific orientation, and therefore cannot be understood as a limitation of this patent.

[0035] The purpose of the present invention is to provide a tail gas treatment furnace containing tar and coal powder, which can oxidize and treat part of the tar and coal powder in the carbonized tail gas in advance, and increase the temperature of the discharged tail gas, so as to reduce a large amount of dust particles entering the subsequent process, so as to solve the problem of boiler failure and explosion caused by the deposition of coal powder in the subsequent waste heat boiler in the prior art, and also solve the problem of tar and coal powder in the tail gas condensing in the pipeline and blocking the pipeline.

[0036] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] Reference Figures 1 to 3 As shown, a tail gas treatment furnace containing tar coal powder of the present invention includes a furnace body 1, a heat storage body 2, a venturi-type channel 21, a combustion gas pipeline 3, a burner 4 and a tail gas straight channel 22.

[0038] Specifically, the furnace body 1 is a kettle structure with an airtight inner cavity, and the heat storage body 2 is fixedly connected to the middle of the inner cavity and divides the inner cavity into a gas collecting chamber 11 and a mixing chamber 12. An air inlet pipe 5 and an air outlet pipe 6 are provided at both ends of the furnace body 1, which are connected to the gas collecting chamber 11 and the mixing chamber 12 respectively and are used to input and discharge carbonized tail gas.

[0039] The air inlet pipe 5 is connected to the carbonization furnace of the previous process to introduce the carbonized tail gas into the gas collecting chamber 11, and the air outlet pipe 6 is connected to the incinerator of the subsequent process to introduce the high-temperature carbonized tail gas mixed in the mixing chamber 12 into the incinerator.

[0040] Specifically, a plurality of the Venturi-type channels 21 are all opened through the heat storage body 2 to guide part of the carbonized tail gas in the gas collecting chamber 11 into the mixing chamber 12 through the heat storage body 2 .

[0041] Specifically, the number of the combustion-supporting gas pipelines 3 is consistent with the number of the Venturi-type channels 21, and all are fixedly connected to one end of the gas collecting chamber 11 of the furnace body 1, and one end of the combustion-supporting gas pipeline 3 extends to the throat 211 of the Venturi-type channel 21 through the gas collecting chamber 11, so as to introduce the combustion-supporting gas into the Venturi-type channel 21.

[0042] Specifically, the number of the burners 4 is consistent with the number of the Venturi-type channels 21, and they are all fixedly connected to the side wall of the furnace body 1. The burners 4 extend to the Venturi-type channels 21 through the heat storage body 2 respectively, and are used to heat the heat storage body 2 and oxidize the tar and coal powder in the carbonized tail gas in the Venturi-type channel 21 through the combustion-supporting gas.

[0043] Specifically, the plurality of exhaust gas straight channels 22 are all disposed through the heat storage body 2 and evenly distributed around the Venturi channel 21 , and are used to introduce the remaining carbonized exhaust gas in the gas collecting chamber 11 into the mixing chamber 12 through the heat storage body 2 .

[0044] In actual use, the burner 4 is first turned on, and the flame nozzle 41 (such as Figure 2 The flame ejected from the heat storage body 2 is heated to a set temperature and then the burner 4 is turned off. Then, the combustible carbonized tail gas containing tar and coal powder generated in the carbonization furnace is introduced into the gas collecting chamber 11 through the air intake pipe 5, and the external combustion-supporting gas is directly introduced into the throat 211 of the Venturi-type channel 21 (as shown in FIG. Figure 3 shown).

[0045] When the combustion-supporting gas passes through the throat 211 with the smallest inner diameter of the Venturi-type channel 21 at a high speed, a certain negative pressure will be formed at its entrance to accelerate the suction of part of the combustible carbonized exhaust gas in the gas collecting chamber 11 into the Venturi-type channel 21, and the sucked carbonized exhaust gas and the introduced combustion-supporting gas will be fully mixed under the guidance of the Venturi-type channel 21, and the high temperature of the heat storage body 2 heated to a specified temperature will cause the combustion-supporting gas to undergo an oxidation reaction with the tar and coal powder in the carbonized exhaust gas, thereby oxidizing and removing the tar and coal powder in the carbonized exhaust gas sucked into the Venturi-type channel 21, greatly reducing the content of tar and coal powder in the carbonized exhaust gas entering the mixing chamber 12.

[0046] At the same time, part of the heat generated during the oxidation of tar and coal powder by the combustion-supporting gas continues to heat the heat storage body 2 to promote the oxidation reaction, and the other part is introduced into the mixing chamber 12 through the bottom of the Venturi channel 21 with the carbonized exhaust gas to provide it with additional heat energy.

[0047] In addition, the remaining combustible carbonized tail gas in the gas collecting chamber 11 enters the mixing chamber 12 through the tail gas straight channel 22 evenly distributed around the venturi-type channel 21 and mixes with the carbonized tail gas discharged through the venturi-type channel 21 after oxidation treatment. The remaining carbonized tail gas will also be heated by the heat storage body 2 during the process of passing through the tail gas straight channel 22, and after entering the mixing chamber 12 and mixing with the high-temperature tail gas discharged from the venturi-type channel 21, the mixed tail gas will be further heated and heated, so that the temperature of the mixed carbonized tail gas discharged through the gas outlet pipe 6 is significantly higher than the temperature of the carbonized tail gas entering the gas collecting chamber 11.

[0048] The temperature of the carbonized tail gas introduced into the incinerator through the gas outlet pipe 6 of the treatment furnace of the present invention is higher than that of the carbonized tail gas introduced into the incinerator in the prior art, and the content of tar and coal powder therein is also significantly reduced.

[0049] After adopting the above technical solution, the processing furnace of the present invention has the following beneficial effects.

[0050] Firstly, the treatment furnace of the present invention can oxidize the tar and pulverized coal in the carbonized exhaust gas in the Venturi-type channel 21 through the combustion-supporting gas introduced through the combustion-supporting gas pipeline 3, thereby oxidizing part of the tar and pulverized coal in the carbonized exhaust gas before the carbonized exhaust gas is introduced into the incinerator of the subsequent process, significantly reducing the amount of dust particles entering the subsequent process, avoiding the deposition of pulverized coal in the subsequent waste heat boiler, preventing the occurrence of abnormal accidents such as boiler failure and explosion due to pulverized coal deposition, and improving the safety and reliability of carbonized exhaust gas treatment.

[0051] In addition, the treatment furnace of the present invention can continue to heat the heat storage body 2 through the Venturi-type channel 21 by utilizing the heat generated by the oxidation reaction between the combustion-supporting gas and the tar and pulverized coal in the carbonized exhaust gas in the channel, thereby promoting the oxidation reaction and increasing the heat of the carbonized exhaust gas in the exhaust gas straight channel 22. The heat of the carbonized exhaust gas mixed in the mixing chamber 12 is continued to be heated by combining the temperature of the heat storage body 2 itself and the heat generated by the oxidation reaction, thereby increasing the temperature of the carbonized exhaust gas discharged through the exhaust outlet pipe 6, effectively solving the problem of pipeline blockage caused by the condensation of tar and pulverized coal in the pipeline due to the low temperature of the carbonized exhaust gas, and ensuring the continuity and reliability of the carbonized exhaust gas treatment.

[0052] As a further improved technical solution adopted by the present invention to solve the technical problem proposed by it, it also includes the following technical features.

[0053] Further, see Figures 1 to 3 As shown, the furnace body 1 described in the present invention is a vertical structure, the heat storage body 2 is axially fixedly connected to the middle position of the inner cavity of the furnace body 1, the gas collecting chamber 11 is located at the upper end of the inner cavity of the furnace body 1, and the mixing chamber 12 is located at the lower end of the inner cavity of the furnace body 1, and the Venturi channel 21 and the exhaust gas straight channel 22 are both vertically evenly distributed on the heat storage body 2.

[0054] Preferably, the number of the Venturi-type channels 21 is set to three, which are evenly distributed on the heat storage body 2 with the axis of the furnace body 1 as the center, and the exhaust gas straight channels 22 are evenly distributed around the Venturi-type channels 21 .

[0055] The treatment furnace of the present invention is configured as a vertical structure, which is conducive to the downward sedimentation of the carbonized tail gas oxidation product (i.e., ash) in the Venturi channel 21, and prevents the ash from adhering to the inner wall of the Venturi channel 21 and blocking the flow of the tail gas.

[0056] Further, see Figure 2 and Figure 3 As shown, the processing furnace of the present invention further includes a waste collecting chamber 13 and a waste discharge port 14.

[0057] Specifically, the waste collection chamber 13 is disposed at the lower end of the mixing chamber 12 and is in communication therewith, and is a funnel-shaped structure for collecting oxidation products (ie, ash) settled in the mixing chamber 12 .

[0058] Specifically, the waste outlet 14 is disposed at the bottom of the furnace body 1 and communicated with the waste collecting chamber 13 for draining the collected ash.

[0059] Preferably, refer to Figures 1 to 3 As shown, a detachable waste discharge cover plate 15 is fixedly connected to the waste discharge port 14 through a screw thread seal. In actual use, the waste discharge cover plate 15 is sealed on the waste discharge port 14 to ensure the airtightness of the inner cavity of the furnace body 1. After a period of use, when the oxidation products (i.e., ash) settled in the waste collection chamber 13 are sufficient, the waste discharge cover plate 15 can be removed and the ash collected in the waste collection chamber 13 can be discharged. The structure is simple, the waste discharge is convenient, and it is convenient for later maintenance.

[0060] This embodiment only exemplifies a specific structure equipped with a waste discharge cover plate 15 . In other embodiments, a waste discharge valve can also be installed on the waste discharge port 14 to perform manual or automatic waste discharge.

[0061] Further, see Figure 3 As shown, the Venturi-type channel 21 of the processing furnace of the present invention includes a contraction section 212, a throat 211 and a diffusion section 213. The contraction section 212 is connected to the gas collecting chamber 11, the diffusion section 213 is connected to the mixing chamber 12, and the throat 211 is close to one side of the contraction section 212.

[0062] The structure of the venturi-type channel 21 has an excellent flow-guiding and flow-stabilizing effect on the incoming fluid. The combustion-supporting gas entering through the combustion-supporting gas pipeline 3 can form a negative pressure at the throat 211 and promote the carbonized tail gas in the gas collecting chamber 11 to accelerate through the contraction section 212 to flow into the diffusion section 213, and the diffusion section 213 is used to fully mix the inhaled carbonized tail gas with the introduced combustion-supporting gas, thereby ensuring the oxidation removal effect of tar and coal powder in the carbonized tail gas. At the same time, the throat 211 of the venturi-type channel 21 of the present invention is closer to the contraction section 212 than the diffusion section 213. This structural design can increase the relative length of the diffusion section 213, further ensuring the sufficient degree of mixing between the carbonized tail gas and the combustion-supporting gas in the venturi-type channel 21.

[0063] Further, see Figure 2As shown, the combustion gas pipelines 3 described in the treatment furnace of the present invention are all straight-through pipe structures, which are respectively vertically inserted and fixedly connected to the top of the furnace body 1. The upper end of the combustion gas pipeline 3 is outside the top of the furnace body 1, and the end thereof is provided with a first connecting flange 31 for connecting to an external combustion gas source pipeline. The lower end of the combustion gas pipeline 3 passes through the gas collecting chamber 11 and the contraction section 212 downwardly and axially extends to the throat 211 of the Venturi-type channel 21 in a one-to-one correspondence, and the ends of the combustion gas pipeline 3 extending to the throat 211 are all in a contracted and gathered tip structure.

[0064] The lower ends of the combustion-supporting gas pipelines 3 of the treatment furnace of the present invention extend axially to the throat 211 of the Venturi-type channel 21, and the pointed structure design at the lower ends ensures that they will not block the throat 211 of the Venturi-type channel 21. This structural design is beneficial to the suction of carbonized exhaust gas in the gas collecting chamber 11, and avoids the lower end of the combustion-supporting gas pipeline 3 from blocking the contraction section 212 and the throat 211.

[0065] Preferably, refer to Figures 2 to 3 As shown, the number of burners 4 of the treatment furnace of the present invention is consistent with the number of Venturi-type channels 21, that is, three, and is a type of nozzle-type pulverized coal burner, including a horizontally arranged flame nozzle 41, the tail end of which is provided with an automatic ignition control device 42, and a mixing pressure regulating device 43 is connected to the lower part, and a gas connector 44 and an oxygen connector 45 are connected to the bottom of the mixing pressure regulating device 43, and a second connecting flange 46 is radially fixedly connected to the flame nozzle 41.

[0066] Further, see Figure 1 to Figure 2 As shown, the burner 4 of the treatment furnace of the present invention is detachably fixed and plugged into the side wall of the furnace body 1, and one end of the flame nozzle 41 of the burner 4 radially extends to the diffusion section 213 in the middle of the Venturi channel 21 through the heat storage body 2 respectively.

[0067] Preferably, refer to Figure 2 and Figure 3 As shown, three first fixing holes 16 are provided on the side wall of the furnace body 1 of the present invention, which are radially corresponding to the outside of the three Venturi-type channels 21, and three first fixing channels 23 are horizontally provided on the heat storage body 2, whose two ends are respectively connected with the first fixing holes 16 and the Venturi-type channels 21, and three burner fixing tubes 17 are radially fixedly connected to the side wall of the furnace body 1, and are inserted into the Venturi-type channels 21 through the first fixing holes 16 and the first fixing channels 23, respectively, and a third connecting flange 171 is fixedly provided at the end of each burner fixing tube 17 located outside the furnace body 1.

[0068] During actual assembly, the flame nozzle 41 of the burner 4 is detachably fixed and inserted into the burner fixing tube 17 through the second connecting flange 46 and the third connecting flange 171, and is connected to the gas through the gas connector 44 and the oxygen through the oxygen connector 45. During actual use, the gas and oxygen are introduced into the flame nozzle 41 according to a certain proportion and pressure through the mixing pressure regulating device 43, and the mixed gas is ignited through the automatic ignition control device 42, and the flame is ejected from the end of the flame nozzle 41 into the venturi-type channel 21 to heat the heat storage body 2.

[0069] The treatment furnace of the present invention removably connects the burner 4 to the side wall of the furnace body 1, and radially connects the flame nozzle 41 of the burner 4 to the Venturi-type channel 21, which can facilitate the subsequent maintenance of the burner 4 and is beneficial to the uniform heating of the heat storage body 2. The Venturi-type channel 21 can also be used to guide the ash produced by combustion into the mixing chamber 12 and the waste collection chamber 13 for discharge.

[0070] Further, see Figure 2 and Figure 3 As shown, the processing furnace of the present invention further includes an inspection entrance 18 and an entrance cover 19.

[0071] Specifically, the inspection entrance 18 is opened at the upper end of the furnace body 1 and is connected to the gas collecting chamber 11. The inlet cover 19 is fixedly installed on the inspection entrance 18 by a screw through a threaded seal that can be opened and closed to block the gas collecting chamber 11. The combustion-supporting gas pipeline 3 is fixedly installed on the body of the inlet cover 19.

[0072] The inlet cover 19 and the inspection inlet 18 provided in the treatment furnace of the present invention can facilitate maintenance personnel to enter and dredge the Venturi channel 21 and the exhaust straight channel 22 on the heat storage body 2 and perform later inspection and maintenance. The structure is simple, easy to use, and convenient for maintenance. At the same time, the treatment furnace of the present invention sets the combustion-supporting gas pipeline 3 on the openable and closable inlet cover 19, which is convenient for aligning the combustion-supporting gas pipeline 3 with the Venturi channel 21, and is also conducive to the later inspection and maintenance of the combustion-supporting gas pipeline 3.

[0073] Further, see Figure 2 and Figure 3 As shown, the exhaust gas straight channel 22 of the treatment furnace of the present invention is a cylindrical channel, and its inner diameter and number are based on the exhaust gas flow rate per unit time being greater than the exhaust gas flow rate of the Venturi channel 21.

[0074] Designing the exhaust gas straight channel 22 as a cylindrical channel is conducive to the passage of carbonized exhaust gas and can improve the overall structural strength of the thermal storage body 2. The inner diameter and number of the exhaust gas straight channel 22 can ensure that the amount of carbonized exhaust gas passing through the exhaust gas straight channel 22 per unit time is always greater than the amount of carbonized exhaust gas passing through the venturi-type channel 21, so as to control the removal amount of tar and coal powder in the carbonized exhaust gas, and prevent the problems of incomplete combustion of coal powder and pipeline blockage in the subsequent incinerator due to insufficient removal. At the same time, it can also prevent the problem of insufficient combustible gas content in the subsequent incinerator due to excessive removal.

[0075] Furthermore, the Venturi channel 21 and the exhaust gas straight channel 22 of the treatment furnace of the present invention are both made of the material of the heat storage body 2 by die casting or extrusion molding.

[0076] Preferably, the material of the heat storage body 2 is a refractory, high-strength ceramic heat storage body 2.

[0077] The Venturi channel 21 and the exhaust gas straight channel 22 of the treatment furnace of the present invention are both made of the material of the heat storage body 2 by die casting or extrusion molding, which can not only ensure the structural strength of the heat storage body 2 but also improve the heating efficiency of the heat storage body 2.

[0078] The above embodiment is only for the purpose of clearly describing a specific implementation of the present invention, and is not intended to limit the implementation of the present invention. For those skilled in the art, based on the present invention, it is possible to deduce and summarize other adjustments or changes to the furnace body 1, the heat storage body 2, the venturi-type channel 21, the combustion gas pipeline 3, the burner 4, the exhaust gas straight channel 22, the waste collection chamber 13, the waste outlet 14, the waste outlet cover 15, the waste outlet valve, the maintenance entrance 18, the entrance cover 19, etc., which will not be listed one by one here. Any modification, replacement or improvement made within the spirit and principle of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A tail gas treatment furnace containing tar coal powder, characterized in that: Included are: A furnace body (1) is provided with a heat storage body (2) whose inner cavity is divided into a gas collecting chamber (11) and a mixing chamber (12), and an air inlet pipe (5) and an air outlet pipe (6) are provided at both ends of the furnace body, which are respectively connected to the gas collecting chamber (11) and the mixing chamber (12) and are used for inputting and discharging carbonized tail gas; A plurality of Venturi-type channels (21) are provided through the heat storage body (2) and are used to guide part of the carbonized tail gas in the gas collection chamber (11) into the mixing chamber (12) through the heat storage body (2); A plurality of combustion-supporting gas pipelines (3) are arranged on the furnace body (1), and extend through the gas collecting chamber (11) to the throat (211) of the Venturi-type channel (21) respectively, for introducing the combustion-supporting gas; A plurality of burners (4) are arranged on the furnace body (1) and extend to the corresponding venturi-type passages (21) through the heat storage body (2) respectively, and are used to heat the heat storage body (2) and oxidize tar and coal powder in the carbonized tail gas in the venturi-type passage (21) through the combustion-supporting gas; A plurality of exhaust gas straight channels (22) are provided through the heat storage body (2) and are evenly distributed around the venturi-type channel (21), and are used to guide the remaining carbonized exhaust gas in the gas collection chamber (11) into the mixing chamber (12) through the heat storage body (2).

2. A tail gas treatment furnace containing tar coal powder according to claim 1, characterized in that: The furnace body (1) is a vertical structure, the gas collecting chamber (11) is located at the upper end of its inner cavity, the mixing chamber (12) is located at the lower end of its inner cavity, and the Venturi-type channel (21) and the exhaust gas straight channel (22) are both vertically evenly distributed on the heat storage body (2).

3. A tail gas treatment furnace containing tar coal powder according to claim 2, characterized in that: Also included are: A waste collection chamber (13) is disposed at the lower end of the mixing chamber (12) and is in communication therewith, and is a funnel-shaped structure for collecting ash and slag settled in the mixing chamber (12); A waste discharge port (14) is provided at the bottom of the furnace body (1) and is connected to the waste collection chamber (13) for draining the collected ash.

4. A tail gas treatment furnace containing tar coal powder according to claim 3, characterized in that: The waste discharge port (14) is provided with an openable and closable waste discharge cover plate (15) or a waste discharge valve.

5. The tail gas treatment furnace containing tar coal powder according to claim 1, characterized in that: The Venturi-type passage (21) comprises a contraction section (212), a throat (211) and a diffusion section (213); the contraction section (212) is connected to the air collecting chamber (11); the diffusion section (213) is connected to the mixing chamber (12); and the throat (211) is close to one side of the contraction section (212).

6. A tail gas treatment furnace containing tar coal powder according to claim 5, characterized in that: The combustion-supporting gas pipeline (3) extends axially to the throat (211) through the gas collecting chamber (11) and the contraction section (212) in a one-to-one correspondence, and the end portion thereof extending to the throat (211) presents a contracted and gathered tip structure.

7. A tail gas treatment furnace containing tarry coal powder according to claim 5, characterized in that: The burners (4) are detachably connected to the side wall of the furnace body (1), and radially extend one by one through the heat storage body (2) to the diffusion section (213) in the middle of the Venturi channel (21).

8. The tail gas treatment furnace containing tar coal powder according to claim 1, characterized in that: Also included are: A maintenance entrance (18) is provided at one end of the furnace body (1) and is in communication with the gas collecting chamber (11); The inlet cover (19) is installed on the inspection inlet (18) in an openable and closable manner to seal the gas collecting chamber (11), and the combustion-supporting gas pipeline (3) is fixedly installed on the body thereof through the inlet cover (19).

9. The tail gas treatment furnace containing tar coal powder according to claim 1, characterized in that: The exhaust gas straight channel (22) is a cylindrical channel, and its inner diameter and number are based on the exhaust gas flow rate per unit time being greater than the exhaust gas flow rate of the Venturi channel (21).

10. The tail gas treatment furnace containing tar coal powder according to claim 1, characterized in that: The Venturi-type channel (21) and the exhaust gas straight channel (22) are both made of the material of the heat storage body (2) by die-casting or extrusion molding.

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