Clean coal combustion device

Abstract

The utility model relates to briquetting coal combustion device technical field, concretely relates to a kind of clean briquetting coal combustion device, including the furnace body with combustion chamber, the coal adding opening being set in the upper end of furnace body, the smoke outlet being set in the side of furnace body and the supporting plate being set in furnace body, the supporting plate is in the form of mesh or perforated plate structure, further including the first air inlet and the second air inlet being set in the both sides of furnace body, two groups of air supply mechanism being set in furnace body and being respectively connected with the first air inlet and the second air inlet, the inclined air duct being set in furnace body and being connected in the first air inlet, annular air duct being set in furnace body and being connected with the second air inlet, the first air inlet and the second air inlet are located below supporting plate, the inclined air duct is inclined upward and towards the middle part of supporting plate, multiple air outlets are annularly arranged on the annular air duct.The present combustion device makes briquetting coal burn fully, and the flue gas is discharged for dust removal, desulfurization and denitrification, to meet environmental protection requirements.

Description

Technical Field

[0001] This utility model relates to the technical field of briquette combustion devices, specifically to a clean briquette combustion device. Background Technology

[0002] Clean coal, as an environmentally friendly alternative to bulk coal, boasts advantages such as high fixed carbon content, low sulfur and ash content, and strong combustion stability. However, its typical blocky structure presents significant design incompatibility issues with traditional combustion devices, making it difficult for existing technologies to fully realize the environmental and energy efficiency potential of clean coal. Traditional combustion devices are prone to accumulating within the combustion chamber, leading to oxygen deficiency in the bottom coal seam, incomplete combustion, low thermal efficiency, and the generation of black smoke and unburned slag.

[0003] Moreover, the optimal combustion temperature range for clean coal has strict requirements. Too low a temperature can easily cause the coal to coke, while too high a temperature can burn out the equipment components. However, existing equipment lacks targeted temperature control measures, resulting in large temperature fluctuations in the combustion chamber, which affects the stability of combustion efficiency and shortens the overall service life of the equipment.

[0004] In terms of flue gas treatment, existing combustion devices often fail to meet current air pollutant emission standards for sulfur dioxide and nitrogen oxides, resulting in poor environmental performance. These issues collectively restrict the widespread application of clean coal in industrial heating and residential heating scenarios, necessitating a combustion device specifically designed for the lumpy characteristics of clean coal to address the aforementioned challenges in adaptability, efficiency, environmental protection, and operation and maintenance. Summary of the Invention

[0005] To address the technical problem of incomplete combustion of briquettes in existing combustion devices, resulting in exhaust gas emissions that fail to meet environmental standards, this invention provides a clean briquette combustion device that ensures complete combustion of briquettes and removes dust, sulfur, and nitrification from the exhaust gas, thus meeting environmental protection requirements.

[0006] The technical solution adopted by this utility model is to provide a clean coal combustion device, including a furnace body with a combustion chamber, a coal feeding port located at the upper end of the furnace body, a flue gas outlet located on one side of the furnace body, and a support plate located inside the furnace body. The support plate is a mesh plate or perforated plate structure. It also includes a first air inlet and a second air inlet located on both sides of the furnace body, two sets of air supply mechanisms located on the furnace body and respectively connected to the first air inlet and the second air inlet, an inclined air guide pipe located inside the furnace body and connected to the first air inlet, and an annular air guide pipe located inside the furnace body and connected to the second air inlet. The first air inlet and the second air inlet are located below the support plate. The inclined air guide pipe is inclined upward and faces the middle of the support plate. The annular air guide pipe has multiple air outlets arranged in a ring below the support plate.

[0007] The air supply mechanism includes a blower, an air supply pipe disposed between the blower outlet and the first air inlet, a flow sensor and a flow regulating valve disposed on the air supply pipe, and the blower is fixed to the outer wall of the furnace body and is on the same side as the connected first air inlet or second air inlet.

[0008] The inner wall of the furnace is provided with a refractory material layer.

[0009] The furnace body is equipped with an electric heating wire and a temperature sensor on its inner wall. The electric heating wire is spirally wound around the middle of the furnace body.

[0010] It also includes a cyclone dust collector and a desulfurization and denitrification mechanism connected to the flue gas outlet. The input end of the cyclone dust collector is connected to the flue gas outlet, and the output end is connected to the input end of the desulfurization and denitrification mechanism.

[0011] The cyclone dust collector is provided with a dust collection mechanism at its lower end. The dust collection mechanism includes a support frame, a weighing sensor located on the upper end of the support frame, and a dust collection hopper located on the upper end of the weighing sensor. The upper end of the dust collection hopper is connected to the dust discharge port at the lower end of the cyclone dust collector.

[0012] The desulfurization and denitrification mechanism includes a shell with an upper chamber and a lower chamber. The upper chamber is filled with adsorbent material and communicates with the lower chamber. The lower chamber is filled with catalytic material and is provided with an exhaust port.

[0013] An observation window is provided in the middle of the front side of the furnace body.

[0014] The beneficial effects of this utility model are that it provides a clean coal combustion device, which adopts two air supply methods. The first air inlet guides the airflow to the middle of the support plate through an inclined air guide pipe, which is the position where coal briquettes tend to accumulate, ensuring that the accumulated coal briquettes can be thoroughly blown through. The second air inlet guides the air through an annular air guide pipe, and delivers air through multiple air outlets arrayed on the annular air guide pipe to achieve uniform air supply, effectively ensuring the complete combustion of coal briquettes and improving coal briquette combustion efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention.

[0016] In the attached diagram, 1 is the furnace body, 2 is the coal feeding port, 3 is the support plate, 4 is the inclined air guide pipe, 5 is the annular air guide pipe, 6 is the blower, 7 is the air supply pipe, 8 is the flow sensor, 9 is the flow regulating valve, 10 is the refractory material layer, 11 is the electric heating wire, 12 is the temperature sensor, 13 is the cyclone dust collector, 14 is the desulfurization and denitrification mechanism, 15 is the weighing sensor, 16 is the ash hopper, 17 is the shell, 18 is the upper chamber, 19 is the lower chamber, and 20 is the observation window. Detailed Implementation

[0017] like Figure 1-2 As shown, this utility model provides a clean coal combustion device, including a furnace body 1 with a combustion chamber, a coal feeding port 2 located at the upper end of the furnace body 1, a flue gas outlet located on one side of the furnace body 1, and a support plate 3 located inside the furnace body 1. The support plate 3 has a mesh plate or perforated plate structure. It also includes a first air inlet and a second air inlet located on both sides of the furnace body 1, two sets of air supply mechanisms located on the furnace body 1 and respectively connected to the first air inlet and the second air inlet, an inclined air guide pipe 4 located inside the furnace body 1 and connected to the first air inlet, and an annular air guide pipe 5 located inside the furnace body 1 and connected to the second air inlet. The first air inlet and the second air inlet are located below the support plate 3. The inclined air guide pipe 4 is inclined upward and faces the middle of the support plate 3. The annular air guide pipe 5 has multiple air outlets arranged in a ring and is located below the support plate 3.

[0018] The furnace body 1 is a metal shell with a combustion chamber inside. The coal feeding port 2 at the top of the furnace body 1 is used to add briquettes into the combustion chamber. The briquettes fall onto the support plate 3 and are ignited by an ignition gun or other ignition methods. The support plate 3 adopts a permeable structure, such as a mesh plate or perforated plate, and is made of alumina ceramic. An air cavity is formed below the support plate 3. The first air inlet and the second air inlet are located in the air cavity. The coal ash or slag after combustion falls through the mesh of the support plate 3. The furnace body 1 is provided with an ash outlet at the bottom and a hopper is placed in the ash outlet. The coal ash or slag falls into the hopper.

[0019] To ensure more complete combustion of briquettes, this device adopts two air supply methods. The first air inlet and the second air inlet are located on different sides of the furnace body 1 to facilitate the installation of the air supply mechanism. The two sets of air supply mechanisms supply air to the first air inlet and the second air inlet respectively. The first air inlet is located at one end inside the furnace body 1 and is guided by the inclined air guide pipe 4 to concentrate the airflow to the middle of the support plate 3, which is the position where briquettes are easy to accumulate. This ensures that the accumulated briquettes can be thoroughly blown through, ensuring sufficient oxygen supply to the coal bed, significantly improving the briquette combustion rate, reducing black smoke emissions, and improving combustion uniformity.

[0020] The second air inlet is located at one end inside the furnace body 1 and is guided by an annular air guide pipe 5. Multiple air outlets are arranged in an array on the annular air guide pipe 5. The air outlets face upward and supply air evenly. Together with the mesh support plate 3, the airflow and flame can form a strong turbulent mixture, which enhances combustion, greatly improves oxygen utilization, and further ensures the complete combustion of coal briquettes.

[0021] The annular air guide duct 5 is a ring-shaped air supply duct. The annular air guide duct 5 is installed on the inner wall of the furnace body 1 and below the support plate 3 by means of a bracket. The specific structure of the bracket is not limited, as long as it can fix the annular air guide duct 5.

[0022] like Figure 1-2As shown, the air supply mechanism includes a blower 6, an air supply pipe 7 disposed between the air outlet of the blower 6 and the first air inlet, a flow sensor 8 and a flow regulating valve 9 disposed on the air supply pipe 7, and the blower 6 is fixed to the outer wall of the furnace body 1 and is on the same side as the first air inlet or the second air inlet connected thereto.

[0023] Blower 6 supplies air to the first or second air inlet through air supply pipe 7. Flow sensor 8 and flow regulating valve 9 are installed sequentially along the air supply direction on air supply pipe 7. Flow sensor 8 can monitor air volume and air velocity, and flow regulating valve 9 can adjust the flow rate. According to the combustion status of briquettes in furnace 1, the air volume can be adjusted in real time to reduce heat loss, ensure that the thermal efficiency of the device remains stable at a high level, and make it more convenient to use.

[0024] like Figure 1-2 As shown, the inner wall of the furnace body 1 is provided with a refractory material layer 10.

[0025] The refractory material layer 10 is made of high-alumina refractory castable. The refractory material layer 10 is made by attaching the refractory material to the inner wall of the furnace body 1 through casting or other means, thereby improving the refractory performance of the furnace body 1 and greatly extending the service life of the equipment.

[0026] like Figure 1-2 As shown, an electric heating wire 11 and a temperature sensor 12 are provided on the inner wall of the furnace body 1. The electric heating wire 11 is spirally wrapped around the middle of the furnace body 1.

[0027] The electric heating wire 11 is fixed to the inner wall of the furnace body 1 and embedded in the refractory material layer 10. The fixing position corresponds to the briquette combustion position above the support plate 3. The electric heating wire 11 is made of nickel-chromium alloy and is fixed to the inner wall of the furnace body 1 by a bracket. The bracket structure is not limited, as long as it can fix the electric heating wire 11. The outer wall of the furnace body 1 has a wire hole for the electric heating wire 11 for easy installation.

[0028] Temperature sensor 12 is also fixed on the inner wall of furnace body 1. The refractory material layer 10 has a corresponding clearance for temperature sensor 12. This design can monitor the temperature inside furnace body 1 in real time through temperature sensor 12 and work together with electric heating wire 11 to accurately maintain the combustion temperature in the optimal combustion range of clean coal, avoiding coal coking and device burnout. According to the temperature inside furnace body 1, the electric heating wire 11 can be selectively turned on to maintain the combustion chamber temperature inside furnace body 1 at 800-1000℃.

[0029] like Figure 1-2 As shown, it also includes a cyclone dust collector 13 and a desulfurization and denitrification mechanism 14 connected to the flue gas outlet. The input end of the cyclone dust collector 13 is connected to the flue gas outlet, and the output end is connected to the input end of the desulfurization and denitrification mechanism 14.

[0030] The flue gas discharged from the exhaust port is dusted by the cyclone dust collector 13, and then desulfurized and denitrified by the desulfurization and denitrification mechanism 14 before being discharged. The combination of the cyclone dust collector 13 and the desulfurization and denitrification mechanism 14 realizes the integrated treatment of dust removal, desulfurization and denitrification of flue gas, which meets the current environmental protection emission standards.

[0031] like Figure 1-2 As shown, the cyclone dust collector 13 is provided with a dust collection mechanism at its lower end. The dust collection mechanism includes a support frame, a weighing sensor 15 disposed on the upper end of the support frame, and a dust collection hopper 16 disposed on the upper end of the weighing sensor 15. The upper end of the dust collection hopper 16 is connected to the dust discharge port at the lower end of the cyclone dust collector 13.

[0032] The cyclone dust collector 13 is an existing device purchased from the market. Particulate matter in the flue gas is separated under centrifugal force and falls into the ash hopper 16 at the bottom. The weighing sensor 15 can monitor the weight change of the ash hopper 16. When the weight reaches the threshold, an alarm will remind the staff to open the outlet of the ash hopper 16 for cleaning. It is easy to use.

[0033] The ash hopper 16 is conical. The upper opening of the ash hopper 16 is connected to the ash discharge port at the lower end of the cyclone dust collector 13. The outer wall of the ash hopper 16 is supported and fixed to the upper end of the weighing sensor 15 by a fixing plate. The lower end of the support frame is fixed to the load-bearing frame. The support frame is not shown in the figure. The specific structure is not limited, as long as it can achieve the supporting function.

[0034] like Figure 1-2 As shown, the desulfurization and denitrification mechanism 14 includes a shell 17 having an upper chamber 18 and a lower chamber 19. The upper chamber 18 is filled with adsorbent material and communicates with the lower chamber 19. The lower chamber 19 is filled with catalytic material and is provided with an exhaust port.

[0035] The casing 17 is divided into two chambers, an upper chamber 18 and a lower chamber 19, which are connected. Flue gas enters through the lower chamber 19, which is the adsorption chamber. This chamber is filled with adsorbent material, such as calcium hydroxide granules, to adsorb sulfur dioxide from the flue gas. After adsorption, the flue gas enters the upper chamber 18, which is the catalytic chamber. This chamber is filled with a vanadium-titanium catalyst to catalytically reduce nitrogen oxides in the flue gas to nitrogen gas. Finally, the flue gas is discharged from the upper chamber 18. This design effectively ensures that flue gas emissions meet environmental protection requirements by removing harmful substances from the flue gas through adsorption and catalysis.

[0036] like Figure 1-2 As shown, an observation window 20 is provided in the middle of the front side of the furnace body 1.

[0037] An opening is provided in the middle of the front end face of the furnace body 1, and an observation window 20 is sealed and installed at the opening. The observation window 20 is made of a metal frame and high-temperature resistant quartz glass, which has a long service life. The metal frame is installed by hinges and can be opened and closed for easy observation.

Claims

1. A clean coal combustion device, comprising a furnace body (1) with a combustion chamber, a coal feeding port (2) located at the upper end of the furnace body (1), a flue gas outlet located on one side of the furnace body (1), and a support plate (3) located inside the furnace body (1), wherein the support plate (3) is a mesh plate or perforated plate structure, characterized in that: It also includes a first air inlet and a second air inlet on both sides of the furnace body (1), two sets of air supply mechanisms on the furnace body (1) and respectively connected to the first air inlet and the second air inlet, an inclined air guide pipe (4) inside the furnace body (1) and connected to the first air inlet, and an annular air guide pipe (5) inside the furnace body (1) and connected to the second air inlet. The first air inlet and the second air inlet are located below the support plate (3). The inclined air guide pipe (4) is inclined upward and faces the middle of the support plate (3). The annular air guide pipe (5) has multiple air outlets arranged in a ring and is located below the support plate (3).

2. The clean coal combustion device according to claim 1, characterized in that: The air supply mechanism includes a blower (6), an air supply pipe (7) set between the air outlet of the blower (6) and the first air inlet, a flow sensor (8) and a flow regulating valve (9) set on the air supply pipe (7). The blower (6) is fixed to the outer wall of the furnace body (1) and is on the same side as the first air inlet or the second air inlet connected thereto.

3. The clean coal combustion device according to claim 1, characterized in that: The inner wall of the furnace body (1) is provided with a refractory material layer (10).

4. The clean coal combustion device according to claim 1, characterized in that: The inner wall of the furnace body (1) is provided with an electric heating wire (11) and a temperature sensor (12), and the electric heating wire (11) is spirally wrapped around the middle of the furnace body (1).

5. A clean coal combustion device according to claim 1, characterized in that: It also includes a cyclone dust collector (13) connected to the flue gas outlet and a desulfurization and denitrification mechanism (14), wherein the input end of the cyclone dust collector (13) is connected to the flue gas outlet and the output end is connected to the input end of the desulfurization and denitrification mechanism (14).

6. A clean coal combustion device according to claim 5, characterized in that: The cyclone dust collector (13) is provided with a dust collection mechanism at its lower end. The dust collection mechanism includes a support frame, a weighing sensor (15) provided at the upper end of the support frame, and a dust collection hopper (16) provided at the upper end of the weighing sensor (15). The upper end of the dust collection hopper (16) corresponds to the dust discharge port at the lower end of the cyclone dust collector (13).

7. A clean coal combustion device according to claim 5, characterized in that: The desulfurization and denitrification mechanism (14) includes a shell (17) having an upper chamber (18) and a lower chamber (19). The upper chamber (18) is filled with adsorbent material and communicates with the lower chamber (19). The lower chamber (19) is filled with catalytic material and is provided with an exhaust port.

8. A clean coal combustion device according to claim 1, characterized in that: An observation window (20) is provided in the middle of the front side of the furnace body (1).

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