Staged combustion decomposing furnace structure for reducing ammonia escape

Abstract

The utility model relates to the technical field of decomposing furnaces, and discloses a staged combustion decomposing furnace structure capable of reducing ammonia escape, which comprises a decomposing furnace body, a support, a reaction chamber and an ammonia water storage tank, a primary combustor and a secondary combustor are fixedly arranged on the decomposing furnace body at an interval, the reaction chamber and the ammonia water storage tank are both fixedly arranged on the support, and the secondary combustor is fixedly arranged on the support. The gas outlet end of the decomposition furnace body is fixedly communicated with a gas guide pipe extending into the reaction chamber, the end part of the gas guide pipe is provided with a gas distribution assembly, the ammonia water storage tank is fixedly provided with an infusion pump, the inlet end of the infusion pump is fixedly communicated with a liquid guide pipe extending into the ammonia water storage tank, and the outlet end of the infusion pump is fixedly communicated with a liquid guide pipe. According to the flue gas denitrification device, ammonia water can be uniformly mixed with flue gas so as to achieve a sufficient reaction effect, the utilization rate of the ammonia water serving as a denitrification reducing agent is improved, and the ammonia escape and flue gas treatment cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of decomposition furnace technology, and more specifically, to a staged combustion decomposition furnace structure that reduces ammonia escape. Background Technology

[0002] A decomposition furnace is a thermal equipment that simultaneously performs fuel combustion, heat exchange, and decomposition reactions. There are many types and forms of decomposition furnaces. The basic principle is to simultaneously feed preheated raw materials, a certain amount of fuel, and an appropriate amount of hot gas into the decomposition furnace. The raw materials are in a suspended or boiling state in the furnace, and the fuel undergoes flameless combustion. At the same time, the heat transfer and calcium carbonate decomposition process are completed at high speed. The staged combustion decomposition furnace is a key piece of equipment in the cement clinker calcination system.

[0003] In existing staged combustion decomposition furnaces, the poor dispersion of the discharged flue gas makes it difficult for ammonia water, used as a denitrification reducing agent, to mix evenly with the flue gas and react fully. This results in reduced ammonia water utilization, ammonia escape, and high flue gas treatment costs. Therefore, this invention designs a staged combustion decomposition furnace structure to reduce ammonia escape and solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a staged combustion decomposition furnace structure that reduces ammonia slip, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A staged combustion decomposition furnace structure for reducing ammonia slip includes a furnace body, a support frame, a reaction chamber, and an ammonia storage tank. A primary burner and a secondary burner are fixedly installed at intervals on the furnace body. The reaction chamber and the ammonia storage tank are both fixedly mounted on the support frame. A gas guide pipe extending into the reaction chamber is fixedly connected to the gas outlet of the furnace body. A gas distribution assembly is provided at the end of the gas guide pipe. A liquid pump is fixedly installed on the ammonia storage tank. The inlet of the liquid pump is fixedly connected to a liquid inlet pipe extending into the ammonia storage tank. The outlet of the liquid pump... A liquid guide tube is fixedly connected to the end of the liquid guide tube. A lower liquid distribution tube is fixedly connected to the bottom side of the liquid guide tube, and an upper liquid distribution tube is fixedly connected to the top side of the liquid guide tube. Both the lower and upper liquid distribution tubes extend into the reaction chamber. Several spray nozzles are fixedly connected to the bottom of both the lower and upper liquid distribution tubes. Several air-blocking inclined plates are fixedly installed in the reaction chamber between the lower and upper liquid distribution tubes. An air-blocking plate is fixedly installed above the bottom side of the air-blocking inclined plates in the reaction chamber. Several air vents are opened on the surface of both the air-blocking inclined plates and the air-blocking plate.

[0007] As a preferred embodiment of the present invention, the gas distribution assembly includes two gas distribution pipes and a gas diffuser. The two gas distribution pipes are symmetrically and fixedly connected to the ends of the air guide pipes, and the gas diffuser is fixedly connected to the ends of the gas distribution pipes.

[0008] As a preferred embodiment of this utility model, the upper end of the reaction chamber is fixedly connected to an exhaust pipe, and one end of the exhaust pipe is fixedly connected to an outlet connector.

[0009] As a preferred embodiment of this utility model, a filter assembly is provided above the upper liquid separator in the reaction chamber. The filter assembly includes a particulate filter layer and an activated carbon adsorption filter layer, which are fixedly installed in the reaction chamber from bottom to top.

[0010] As a preferred embodiment of this utility model, the bottom end of the reaction chamber is fixedly connected to a drain pipe, a switch valve a is fixedly installed on the drain pipe, and a drain connector is fixedly connected to the bottom end of the drain pipe.

[0011] As a preferred embodiment of this utility model, the upper end of the ammonia storage tank is fixedly connected to an inlet pipe, and a switch valve b is fixedly installed on the inlet pipe, with an inlet connector fixedly connected to the upper end of the switch valve b.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention allows flue gas from the decomposition furnace to diffuse into the furnace through a gas guide pipe and a gas distribution assembly. A liquid pump draws ammonia from the ammonia storage tank into the lower and upper distribution pipes, whereby the ammonia is atomized and sprayed out through its respective nozzles. Some of the flue gas passes through the air vents and the baffle plate and baffle plate. The baffle plate and baffle plate work together to effectively slow down the flow of flue gas, thereby improving the dispersion of the flue gas and promoting uniform mixing of ammonia with the flue gas for a full reaction. This increases the utilization rate of ammonia as a denitrification reducing agent and helps reduce ammonia escape and flue gas treatment costs. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a staged combustion decomposition furnace structure for reducing ammonia slip according to the present invention.

[0015] Figure 2 This is a cross-sectional schematic diagram of a staged combustion decomposition furnace structure for reducing ammonia slip according to the present invention.

[0016] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;

[0017] Figure 4 for Figure 2 A magnified structural diagram of part B.

[0018] In the diagram: 1. Decomposition furnace body; 101. Primary burner; 102. Secondary burner; 2. Support frame; 3. Reaction chamber; 301. Air baffle plate; 302. Air baffle plate; 303. Vent hole; 304. Exhaust pipe; 305. Gas outlet connector; 306. Sewage pipe; 307. Switch valve a; 308. Sewage connector; 4. Ammonia water storage tank; 401. Liquid inlet pipe; 402. Switch valve b; 403. Liquid inlet connector; 5. Gas guide pipe; 501. Gas distribution assembly; 5011. Gas distribution pipe; 5012. Gas diffuser; 6. Liquid pump; 601. Liquid inlet pipe; 7. Liquid guide pipe; 701. Lower liquid distribution pipe; 702. Upper liquid distribution pipe; 703. Spray nozzle; 8. Filter assembly; 801. Particulate filter layer; 802. Activated carbon adsorption filter layer. Detailed Implementation

[0019] 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.

[0020] like Figures 1 to 4As shown, this utility model provides a staged combustion decomposition furnace structure to reduce ammonia slip, including a decomposition furnace body 1, a support 2, a reaction chamber 3, and an ammonia storage tank 4. A primary burner 101 and a secondary burner 102 are fixedly installed at intervals on the decomposition furnace body 1. The primary burner 101 and the secondary burner 102 are used in conjunction to achieve staged combustion. The reaction chamber 3 and the ammonia storage tank 4 are both fixedly installed on the support 2. A gas guide pipe 5 extending into the reaction chamber 3 is fixedly connected to the gas outlet end of the decomposition furnace body 1. A gas distribution component 501 is provided at the end of the gas duct 5. The flue gas in the decomposition furnace body 1 diffuses into the decomposition furnace body 1 through the gas duct 5 and the gas distribution component 501. A liquid pump 6 is fixedly installed on the ammonia water storage tank 4. The inlet end of the liquid pump 6 is fixedly connected to a liquid inlet pipe 601 extending into the ammonia water storage tank 4. The outlet end of the liquid pump 6 is fixedly connected to a liquid guide pipe 7. The bottom side of the liquid guide pipe 7 is fixedly connected to a lower liquid distributor pipe 701, and the top side of the liquid guide pipe 7 is fixedly connected to an upper liquid distributor pipe 702. The liquid pump 6 can be used to pump ammonia... Ammonia water in water storage tank 4 is pumped into lower distribution pipe 701 and upper distribution pipe 702. Both lower distribution pipe 701 and upper distribution pipe 702 extend into reaction chamber 3. Several spray nozzles 703 are fixedly connected to the bottom of both lower distribution pipe 701 and upper distribution pipe 702, allowing the ammonia water in each pipe to be atomized and sprayed out through their respective nozzles 703. Several baffles 301 are fixedly installed between lower distribution pipe 701 and upper distribution pipe 702 within reaction chamber 3. An air-blocking plate 302 is fixedly installed above the bottom side of the air-blocking inclined plate 301. Several ventilation holes 303 are opened on the surface of both the air-blocking inclined plate 301 and the air-blocking plate 302, so that some flue gas can pass through the air-blocking inclined plate 301 and the air-blocking plate 302 through the ventilation holes 303. The air-blocking inclined plate 301 and the air-blocking plate 302 work together to effectively slow down the flow of flue gas, thereby changing the flow path of the flue gas and promoting the uniform mixing of ammonia water with the flue gas to achieve a full reaction effect.

[0021] Among them, such as Figure 2 As shown, the gas distribution assembly 501 includes two gas distribution pipes 5011 and a gas diffusion hood 5012. The two gas distribution pipes 5011 are symmetrically and fixedly connected to the ends of the gas guide pipe 5, and the gas diffusion hood 5012 is fixedly connected to the ends of the gas distribution pipes 5011. The two gas distribution pipes 5011 and the gas diffusion hood 5012 can disperse and guide the flue gas in the gas guide pipe 5 into the decomposition furnace body 1, so that the gas distribution assembly 501 can have a good diffusion effect on the flue gas.

[0022] Among them, such as Figure 2 As shown, an exhaust pipe 304 is fixedly connected to the upper end of the reaction chamber 3, and an exhaust connector 305 is fixedly connected to one end of the exhaust pipe 304, which can be connected to the corresponding pipeline.

[0023] Among them, such as Figure 4As shown, a filter assembly 8 is provided above the upper liquid separator 702 in the reaction chamber 3. The filter assembly 8 includes a particulate filter layer 801 and an activated carbon adsorption filter layer 802. The particulate filter layer 801 and the activated carbon adsorption filter layer 802 are fixedly installed in the reaction chamber 3 from bottom to top. The particulate filter layer 801 can filter out particulate impurities in the gas obtained after the reaction treatment. The gas is finally discharged after being adsorbed and purified by the activated carbon adsorption filter layer 802.

[0024] Among them, such as Figure 2 As shown, a drain pipe 306 is fixedly connected to the bottom of the reaction chamber 3. A switch valve a307 is fixedly installed on the drain pipe 306. A drain connector 308 is fixedly connected to the bottom of the drain pipe 306, which can connect the liquid inlet pipe 401 to the corresponding pipeline.

[0025] Among them, such as Figure 1 As shown, the upper end of the ammonia storage tank 4 is fixedly connected to an inlet pipe 401, a switch valve b402 is fixedly installed on the inlet pipe 401, and an inlet connector 403 is fixedly connected to the upper end of the inlet pipe 401, which can connect the inlet pipe 401 to the ammonia supply pipeline.

[0026] The working principle of this utility model:

[0027] During operation, the flue gas in the decomposition furnace body 1 diffuses into the decomposition furnace body 1 through the gas guide pipe 5 and the gas distribution component 501. The ammonia water in the ammonia water storage tank 4 is pumped to the lower distribution pipe 701 and the upper distribution pipe 702 by the liquid pump 6, so that the ammonia water in the lower distribution pipe 701 and the upper distribution pipe 702 can be atomized and sprayed out through their respective spray nozzles 703. Some of the flue gas can pass through the air vent 303 and the baffle plate 301 and the baffle plate 302. The baffle plate 301 and the baffle plate 302 work together to effectively slow down the flow of flue gas, thereby improving the dispersion of flue gas flow and promoting the uniform mixing of ammonia water with flue gas to achieve a full reaction effect. This improves the utilization rate of ammonia water as a denitrification reducing agent. The particulate impurities in the gas obtained after reaction treatment can be filtered out through the particulate filter layer 801. The gas is finally discharged after being purified by the activated carbon adsorption filter layer 802.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A staged combustion de-composition furnace configuration for reducing ammonia slip, characterized by: Including decomposition furnace body (1), support (2), reaction chamber (3) and ammonia water storage tank (4); The first and second combustors (101 and 102) are fixedly arranged on the decomposition furnace body (1) at intervals, the reaction chamber (3) and the ammonia water storage tank (4) are fixedly installed on the support (2), the gas outlet end of the decomposition furnace body (1) is fixedly connected with a gas guide pipe (5) extending into the reaction chamber (3), the end of the gas guide pipe (5) is provided with a gas distribution assembly (501), the ammonia water storage tank (4) is fixedly installed with a liquid pumping pump (6), the inlet end of the liquid pumping pump (6) is fixedly connected with a liquid guide pipe (601) extending into the ammonia water storage tank (4). The outlet end of the liquid pumping pump (6) is fixedly connected with a liquid guide pipe (7), the bottom side of the liquid guide pipe (7) is fixedly connected with a lower liquid distribution pipe (701), the top side of the liquid guide pipe (7) is fixedly connected with an upper liquid distribution pipe (702), the lower liquid distribution pipe (701) and the upper liquid distribution pipe (702) extend into the reaction chamber (3), the bottom of the lower liquid distribution pipe (701) and the upper liquid distribution pipe (702) are fixedly connected with a plurality of spray nozzles (703), a plurality of gas blocking inclined plates (301) are fixedly installed in the reaction chamber (3) between the lower liquid distribution pipe (701) and the upper liquid distribution pipe (702), a gas blocking flat plate (302) is fixedly installed above the bottom side of the gas blocking inclined plate (301) in the reaction chamber (3), a plurality of gas permeation holes (303) are formed in the surfaces of the gas blocking inclined plate (301) and the gas blocking flat plate (302).

2. A staged combustion de-composition furnace structure for reducing ammonia slip as claimed in claim 1, wherein: The gas distribution assembly (501) comprises two gas distribution pipes (5011) and a gas distribution cover (5012), the two gas distribution pipes (5011) are fixedly and symmetrically connected with the end of the gas guide pipe (5), and the gas distribution cover (5012) is fixedly connected with the end of the gas distribution pipe (5011).

3. A staged combustion de-composition furnace structure for reducing ammonia slip as claimed in claim 1, wherein: The upper end of the reaction chamber (3) is fixedly connected with an exhaust pipe (304), and one end of the exhaust pipe (304) is fixedly connected with an air outlet joint (305).

4. A staged combustion de-composition furnace structure for reducing ammonia slip as claimed in claim 1, wherein: A filter assembly (8) is arranged above the upper liquid distribution pipe (702) in the reaction chamber (3), the filter assembly (8) comprises a particle filter layer (801) and an activated carbon adsorption filter layer (802), and the particle filter layer (801) and the activated carbon adsorption filter layer (802) are fixedly installed in the reaction chamber (3) in sequence from bottom to top.

5. A staged combustion de-composition furnace structure for reducing ammonia slip as claimed in claim 1, wherein: The bottom end of the reaction chamber (3) is fixedly connected with a blowdown pipe (306), a switch valve a (307) is fixedly arranged on the blowdown pipe (306), and the bottom end of the blowdown pipe (306) is fixedly connected with a blowdown joint (308).

6. A staged combustion de-composition furnace structure for reducing ammonia slip as claimed in claim 1, wherein: The upper end of the ammonia water storage tank (4) is fixedly connected with a liquid inlet pipe (401), a switch valve b (402) is fixedly arranged on the liquid inlet pipe (401), and the upper end of the liquid inlet pipe (401) is fixedly connected with a liquid inlet joint (403).

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