Decomposition furnace capable of purifying flue gas

Abstract

The utility model discloses a decomposing furnace capable of purifying flue gas, which relates to the technical field of decomposing furnaces, and comprises a decomposing furnace main body, an air inlet pipeline and a purifying mechanism, the middle part of the outer wall of the decomposing furnace main body is connected with the air inlet pipeline, and the top end of the outer wall of the decomposing furnace main body is in butt joint with a smoke exhaust pipeline. When the decomposing furnace capable of purifying the flue gas is used, atomized limestone slurry is sprayed to the flue gas through the purifying mechanism, fine particles in the flue gas are blocked through the filter screen disc and are prevented from being discharged along with the flue gas, then the flue gas is purified, and harmful substances in the flue gas are prevented from being discharged into the atmosphere without being treated; and the cleaning scraping rod rotates to rub with the bottom end of the filter screen disc, so that impurities blocked at the bottom end of the filter screen disc are scraped off, the filter screen disc is prevented from being quickly blocked by the impurities to influence the filtering effect, and when the decomposing furnace is used, the effects of conveniently purifying flue gas and preventing the filter screen disc from being quickly blocked are achieved.

Description

Technical Field

[0001] This utility model relates to the field of decomposition furnace technology, specifically a decomposition furnace capable of purifying flue gas. Background Technology

[0002] Cement calcination is a key step in the cement production process, referring to the process of processing various raw materials into cement clinker through chemical reactions at high temperatures. The decomposition furnace is a heating device that can heat materials and cause them to undergo physical or chemical changes. In the cement production process, the main function of the decomposition furnace is to preheat and decompose the raw materials, so that most of the carbonate decomposition reaction is completed before entering the rotary kiln, thereby improving production efficiency and thermal efficiency and reducing the heat load of the rotary kiln.

[0003] According to the CN220750785U decomposition furnace patent, this patent includes an inlet pipe, a vortex chamber, a constriction section, and a decomposition chamber. An air inlet pipe is connected to the side wall of the decomposition chamber. The vortex chamber is partially conical, with its smaller diameter end sealed to the inlet pipe. One end of the constriction section is connected to the larger diameter end of the vortex chamber, and the other end is connected to the end of the decomposition chamber. The neck of the constriction section has a smaller cross-sectional area than both the larger diameter ends of the decomposition chamber and the vortex chamber. Pulverized coal injection pipes are inserted into the side walls of the vortex chamber and the decomposition chamber. Due to the presence of the constriction section, this decomposition furnace can prevent the airflow formed in the vortex chamber and the decomposition chamber from flowing back into the vortex chamber. Especially when a feeding chamber is provided, it can better ensure the separation between the vortex chamber and the decomposition chamber, allowing the pulverized coal to react fully in the vortex chamber and the raw material fed from the feeding chamber to be fully decomposed in the decomposition chamber. This improves the overall power consumption and yield of the decomposition furnace.

[0004] However, during the use of the decomposition furnace, a large amount of flue gas is generated due to the combustion of fuel and the decomposition of raw materials. This flue gas contains a variety of harmful substances. However, the aforementioned patent does not include a flue gas treatment component, which results in the flue gas being directly emitted into the atmosphere without treatment, which will harm the environment and human health, thereby affecting the use of the decomposition furnace. Utility Model Content

[0005] The purpose of this invention is to provide a decomposition furnace capable of purifying flue gas, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a decomposition furnace capable of purifying flue gas, comprising a decomposition furnace body, an air inlet duct, and a purification mechanism. The air inlet duct is connected to the middle of the outer wall of the decomposition furnace body, and an exhaust duct is connected to the top of the outer wall of the decomposition furnace body. The purification mechanism includes a treatment tank, a storage tank, a high-pressure water pump, an output duct, a conveying duct, a spray seat, an atomizing nozzle, a demister, an end cap, a discharge duct, a support ring, a filter screen, a support base, a rotating column, a transmission plate, and a cleaning scraper. The treatment tank is connected to the side of the exhaust duct away from the decomposition furnace body. A storage tank is welded to the bottom of the outer wall of the treatment tank, and a high-pressure water pump is connected to the middle of the outer wall of the storage tank via a support plate. An output duct is connected to the bottom input end of the high-pressure water pump, and a conveying duct is connected to the top of the outer wall of the conveying duct. An atomizing nozzle is connected to the bottom of the outer wall of the spray seat, and a demister is installed in the middle of the inner wall of the treatment tank.

[0007] Preferably, the storage tank has an end cap connected to the top of its outer wall, and a discharge pipe is connected to the middle of the top of the end cap. The processing tank has a support ring welded to the top of its inner wall, and a filter screen is connected to the top of the outer wall of the support ring.

[0008] Preferably, the atomizing nozzles are arranged in a cross shape, and both the output pipe and the delivery pipe are L-shaped. The bottom of the outer wall of the output pipe is connected to the storage tank, and the top of the outer wall of the delivery pipe is connected to the processing tank.

[0009] Preferably, the support ring has an "O" shaped structure, a support seat is welded to the top of the outer wall of the discharge pipe, and a rotating column is connected inside the support seat, and the support seat has a "U" shaped structure.

[0010] Preferably, the support base has a movable hole in the middle, into which the rotating column extends. The top of the outer wall of the rotating column is connected to a transmission plate, and the bottom of the outer wall of the rotating column is connected to a cleaning scraper.

[0011] Preferably, the transmission plate is hexagonal, and the rotating column and the cleaning scraper have an "L" shaped structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: When the decomposition furnace for purifying flue gas is used, the atomized limestone slurry is sprayed onto the flue gas through the purification mechanism, and then the fine particles in the flue gas are blocked by the filter screen to prevent them from being discharged with the flue gas, thereby purifying the flue gas and preventing harmful substances in the flue gas from being discharged into the atmosphere without treatment; and the cleaning scraper rotates and rubs against the bottom of the filter screen, thereby scraping off the impurities blocked at the bottom of the filter screen, preventing the filter screen from being quickly blocked by impurities and affecting the filtration effect. Thus, when the decomposition furnace is used, it plays a role in facilitating the purification of flue gas and preventing the filter screen from being quickly blocked. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of this utility model;

[0015] Figure 3 This is a three-dimensional cross-sectional view of the processing tank of this utility model;

[0016] Figure 4 This is a three-dimensional structural diagram of the jet seat of this utility model;

[0017] Figure 5 This is a three-dimensional structural diagram of the transmission plate of this utility model;

[0018] Figure 6 This is a schematic diagram of the three-dimensional cross-sectional structure of the support ring of this utility model.

[0019] In the diagram: 1. Main body of the decomposition furnace; 2. Air inlet duct; 3. Smoke exhaust duct; 4. Purification mechanism; 401. Processing tank; 402. Storage tank; 403. High-pressure water pump; 404. Output duct; 405. Conveying duct; 406. Spray seat; 407. Atomizing nozzle; 408. Demister; 409. End cap; 410. Discharge duct; 411. Support ring; 412. Filter screen; 413. Support base; 414. Rotating column; 415. Transmission plate; 416. Cleaning scraper. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-6This utility model provides a technical solution: a decomposition furnace capable of purifying flue gas, comprising a decomposition furnace body 1, an air inlet pipe 2, and a purification mechanism 4. The air inlet pipe 2 is connected to the middle of the outer wall of the decomposition furnace body 1, and an exhaust pipe 3 is connected to the top of the outer wall of the decomposition furnace body 1. The purification mechanism 4 includes a processing tank 401, a storage tank 402, a high-pressure water pump 403, an output pipe 404, a conveying pipe 405, a spray seat 406, an atomizing nozzle 407, a demister 408, an end cap 409, a discharge pipe 410, a support ring 411, a filter screen 412, a support base 413, and a rotating column. 414, transmission plate 415 and cleaning scraper 416, a processing tank 401 is connected to the side of the exhaust pipe 3 away from the decomposition furnace body 1, a storage tank 402 is welded to the bottom of the outer wall of the processing tank 401, and a high-pressure water pump 403 is connected to the middle of the outer wall of the storage tank 402 through a support plate, an output pipe 404 is connected to the bottom input end of the high-pressure water pump 403, and a conveying pipe 405 is connected to the top of the high-pressure water pump 403, and a spray seat 406 is connected to the top of the outer wall of the conveying pipe 405, and an atomizing nozzle 407 is connected to the bottom of the outer wall of the spray seat 406. An atomizing nozzle 407 is installed in the middle of the inner wall of the processing tank 401. The system includes a demister 408; an end cap 409 is connected to the top of the outer wall of the storage tank 402, and a discharge pipe 410 is connected to the middle of the top of the end cap 409; a support ring 411 is welded to the top of the inner wall of the treatment tank 401, and a filter screen 412 is connected to the top of the outer wall of the support ring 411; atomizing nozzles 407 are arranged in a "+" shape; both the output pipe 404 and the conveying pipe 405 are "L" shaped; the bottom of the outer wall of the output pipe 404 is connected to the storage tank 402, and the top of the outer wall of the conveying pipe 405 is connected to the treatment tank 401; the support ring 411 is "O" shaped, and the discharge pipe 410... A support base 413 is welded to the top of the outer wall, and a rotating column 414 is connected inside the support base 413. The support base 413 has a "U" shaped structure. An movable hole is opened in the middle of the support base 413, and the rotating column 414 extends into it. A transmission plate 415 is connected to the top of the outer wall of the rotating column 414, and a cleaning scraper 416 is connected to the bottom of the outer wall of the rotating column 414. The transmission plate 415 is hexagonal, and the rotating column 414 and the cleaning scraper 416 have an "L" shaped structure. An movable opening is opened in the middle of the filter screen 412, and the bottom of the rotating column 414 extends into it. The storage tank 402 contains slurry.

[0022] In practical implementation, during the operation of the decomposition furnace, in order to purify the flue gas generated during the operation of the decomposition furnace, after the flue gas generated by the decomposition furnace body 1 is introduced into the treatment tank 401 through the flue gas exhaust pipe 3, the high-pressure water pump 403 is first started because its bottom input end is connected to the output pipe 404 and its top output end is connected to the conveying pipe 405. Then, the slurry containing limestone in the storage tank 402 is discharged through the output pipe 404, and then the slurry is introduced into the spray seat 406 through the conveying pipe 405. Since the spray seat 406 is connected to the atomizing nozzle 407, the slurry is atomized and sprayed out through the atomizing nozzle 407, so that the atomized limestone slurry reacts with the incoming flue gas. During the spraying operation, the limestone slurry absorbs harmful substances such as sulfur dioxide in the flue gas, generating calcium sulfite and calcium sulfate, which purifies the flue gas. The flue gas then continues to rise and comes into contact with the demister 408, which removes the limestone slurry carried in the flue gas. Since the top of the support ring 411 is connected to the filter screen 412, the flue gas is filtered through the filter screen 412 to block fine particles in the flue gas and prevent them from being discharged with the flue gas. The flue gas is then discharged through the discharge pipe 410 at the top of the end cover 409, thus purifying the flue gas and preventing harmful substances in the flue gas from being discharged into the atmosphere without treatment, thereby preventing them from harming the environment and human health.

[0023] Because the top of the rotating column 414 is connected to the transmission plate 415, when the external airflow passes through the transmission plate 415, it will generate a thrust on the transmission plate 415, causing the transmission plate 415 to drive the rotating column 414 to rotate. At this time, the support base 413 assists the rotating column 414 in rotating. Since the bottom end of the rotating column 414 is connected to the cleaning scraper 416, the rotation of the rotating column 414 will drive the cleaning scraper 416 to rotate together. At this time, the outer wall of the cleaning scraper 416 will rub against the bottom end of the filter screen 412, thereby scraping off the impurities blocked at the bottom end of the filter screen 412, preventing the filter screen 412 from being quickly blocked by impurities and affecting the filtration effect. Afterwards, only the end cover 409 needs to be removed to expose the top of the inner wall of the treatment tank 401, and then maintenance and cleaning can be carried out. Thus, when the decomposition furnace is used, it plays a role in facilitating the purification of flue gas and preventing the filter screen 412 from being quickly blocked.

[0024] In summary, when using this decomposition furnace capable of purifying flue gas, hot air is first introduced into the furnace body 1 through the air inlet pipe 2, thereby preheating and decomposing the raw materials inside the furnace body 1, so that most of the carbonate decomposition reaction is completed before entering the rotary kiln. The flue gas during the operation is then discharged from the decomposition furnace through the exhaust pipe 3. This is existing technology and will not be elaborated on here. The purification mechanism 4 sprays atomized limestone slurry onto the flue gas, and then the filter screen 412 blocks fine particles in the flue gas, preventing them from being discharged with the flue gas, thereby purifying the flue gas and preventing harmful substances in the flue gas from being discharged into the atmosphere without treatment. Furthermore, the cleaning scraper 416 rotates and rubs against the bottom of the filter screen 412, thereby scraping off the impurities blocked at the bottom of the filter screen 412, preventing the filter screen 412 from being quickly blocked by impurities and affecting the filtration effect. The contents not described in detail in this description are existing technologies known to those skilled in the art.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A decomposition furnace capable of purifying flue gas, comprising a decomposition furnace body (1), an air inlet duct (2), and a purification mechanism (4), wherein the air inlet duct (2) is connected to the middle of the outer wall of the decomposition furnace body (1), and an exhaust duct (3) is connected to the top of the outer wall of the decomposition furnace body (1), characterized in that: The purification mechanism (4) includes a processing tank (401), a storage tank (402), a high-pressure water pump (403), an output pipe (404), a conveying pipe (405), a spray seat (406), an atomizing nozzle (407), a demister (408), an end cap (409), an exhaust pipe (410), a support ring (411), a filter screen (412), a support base (413), a rotating column (414), a transmission plate (415), and a cleaning scraper (416). The exhaust pipe (3) is connected to the processing tank (401) on the side away from the decomposition furnace body (1). The bottom of the outer wall of the treatment tank (401) is welded to a storage tank (402), and a high-pressure water pump (403) is connected to the middle of the outer wall of the storage tank (402) via a support plate. The bottom input end of the high-pressure water pump (403) is connected to an output pipe (404), and the top input end of the high-pressure water pump (403) is connected to a conveying pipe (405). The top of the outer wall of the conveying pipe (405) is connected to a spray seat (406), and the bottom of the outer wall of the spray seat (406) is connected to an atomizing nozzle (407). A demister (408) is installed in the middle of the inner wall of the treatment tank (401).

2. A decomposition furnace capable of cleaning flue gas according to claim 1, characterized in that: The storage tank (402) has an end cap (409) connected to the top of its outer wall, and a discharge pipe (410) is connected to the middle of the top of the end cap (409). The processing tank (401) has a support ring (411) welded to the top of its inner wall, and a filter screen (412) is connected to the top of the outer wall of the support ring (411).

3. A decomposition furnace capable of cleaning flue gas according to claim 2, characterized in that: The atomizing nozzles (407) are arranged in a "+" shape, and the output pipe (404) and the conveying pipe (405) are both in an "L" shape. The bottom of the outer wall of the output pipe (404) is connected to the storage tank (402), and the top of the outer wall of the conveying pipe (405) is connected to the processing tank (401).

4. A decomposition furnace capable of cleaning flue gas according to claim 3, characterized in that: The support ring (411) has an "O" shaped structure. The top of the outer wall of the discharge pipe (410) is welded with a support seat (413), and a rotating column (414) is connected inside the support seat (413). The support seat (413) has a "U" shaped structure.

5. A decomposition furnace capable of cleaning flue gas according to claim 4, characterized in that: The support base (413) has a movable hole in the middle, and the rotating column (414) extends into it. The top of the outer wall of the rotating column (414) is connected to a transmission plate (415), and the bottom of the outer wall of the rotating column (414) is connected to a cleaning scraper (416).

6. A decomposition furnace capable of cleaning flue gas according to claim 5, characterized in that: The transmission plate (415) is hexagonal, and the rotating column (414) and the cleaning scraper (416) have an "L" shaped structure.

Images