Up-suction type water jacket gasification furnace

Abstract

The utility model discloses an updraft water jacket gasification furnace which comprises a furnace body, a stirring device and a ventilation device, a water jacket structure is constructed by a steel plate cavity interlayer formed by the inner-layer steel plate furnace lining and the outer-layer steel plate furnace shell, and heat in the furnace can be effectively taken away by circulating water. Compared with a traditional mode of adopting castable for heat insulation, the additional weight of the furnace body due to increase of the castable is reduced, the requirement for a foundation supporting structure of the furnace body is lowered, installation and long-term stable operation of equipment are facilitated, and the reliability and safety of the equipment structure are improved on the whole. Water flows in the steel plate cavity interlayer, so that a relatively uniform heat dissipation effect can be achieved, and the phenomenon of local overheating is effectively avoided. Therefore, the pyrolysis gasification reaction in the furnace body can be more stable, the adverse effect of temperature fluctuation on the reaction process is reduced, and the operation stability and the treatment efficiency of the gasification furnace are further improved; meanwhile, the device is low in manufacturing cost, simple in structure and convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of stove technology, specifically to an upward suction water jacket gasifier. Background Technology

[0002] Pyrolysis gasification technology is widely used due to its advantages such as low investment, low dioxin pollutant content, and high volume reduction. The pyrolysis gasifier is the key equipment in pyrolysis gasification technology. Traditional pyrolysis gasifiers require the placement of castable refractory material inside to resist the high temperature inside the furnace and protect the furnace body and personnel on the outer wall. However, the cost of castable refractory material is high, and the furnace body after casting is large, which brings trouble to subsequent operation and maintenance. Utility Model Content

[0003] Therefore, this utility model provides an upward suction water jacket gasifier to solve the above-mentioned problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] According to a first aspect of the present invention, an upward suction water jacket gasifier includes a furnace body, a stirring device, and a ventilation device.

[0006] The furnace body includes an inner steel plate lining, an outer steel plate shell, a bottom support, and a top sealing plate. The internal space of the inner steel plate lining is the furnace cavity. The inner steel plate lining is fitted inside the outer steel plate shell, and the inner steel plate lining and the outer steel plate shell are spaced apart to form a steel plate cavity partition. The bottoms of both the inner and outer steel plate linings are connected to the top of the bottom support, and the tops of both the inner and outer steel plate linings are connected to the top sealing plate. A water inlet is provided at the bottom of the outer steel plate shell, and the water inlet communicates with the steel plate cavity partition. A water outlet is provided at the top of the outer steel plate shell, and the water outlet communicates with the steel plate cavity partition.

[0007] The furnace body has a feed inlet on one side of the top and a gas outlet on the other side of the top. Both the feed inlet and the gas outlet are connected to the furnace cavity.

[0008] The stirring device includes a drive motor and a stirring rod. The output end of the drive motor is connected to the stirring rod, and the stirring rod is inserted into the furnace cavity from the top sealing plate.

[0009] The ventilation device is provided at the bottom of the furnace body, and the ventilation device is connected to the bottom of the furnace cavity;

[0010] The feed inlet and the gas outlet are both arranged horizontally on the furnace body.

[0011] Furthermore, the ventilation device includes an annular air belt and steel pipes. The annular air belt is arranged around the furnace body and has several air outlets. Several air outlets of the steel pipes are connected to the bottom of the furnace cavity and are evenly arranged along the inner wall of the furnace cavity. Each air outlet of the annular air belt is connected to each air inlet of the steel pipe.

[0012] Furthermore, the annular air duct has two air inlets, which are arranged diagonally at 180°. The air inlets of the annular air duct and the air outlet of the air supply equipment are connected by flanges.

[0013] Furthermore, it also includes an emergency discharge device, which includes a pneumatic valve and a pressure gauge. The pneumatic valve is provided on the top sealing plate and is connected to the furnace cavity. The pressure gauge is provided on the furnace body and is used to monitor the pressure inside the furnace cavity. The pneumatic valve and the pressure gauge are electrically connected.

[0014] Furthermore, an explosion-proof opening is provided in the middle of the top sealing plate, the explosion-proof opening is connected to the furnace cavity, and an end cap is provided on the explosion-proof opening, the end cap being sealed and fastened to the explosion-proof opening.

[0015] Furthermore, the top sealing plate includes a steel plate layer and insulation cotton. The top of the inner steel plate furnace lining and the outer steel plate furnace shell are both connected to the bottom of the steel plate layer, and the upper surface of the steel plate layer is covered with insulation cotton.

[0016] Furthermore, the furnace body is equipped with thermocouples, which are evenly arranged on both sides of the furnace body.

[0017] Furthermore, the furnace body is equipped with a level gauge, which includes a first level gauge and a second level gauge. The first level gauge is used to monitor the full material condition in the furnace cavity, and the second level gauge is used to monitor the material shortage condition in the furnace cavity.

[0018] Furthermore, it also includes a manhole and support legs. The bottom of the bottom support is provided with four support legs, which are evenly distributed along the edge of the bottom support. A manhole is provided on the furnace body, and the manhole is connected to the furnace cavity.

[0019] Furthermore, it also includes reinforcing ribs, and multiple reinforcing ribs are provided in the hollow steel plate partition. The multiple reinforcing ribs divide the hollow steel plate partition into several regions, and multiple water passage holes are opened on the reinforcing ribs, and adjacent regions are connected through the water passage holes.

[0020] This invention has the following advantages: A water jacket structure is constructed by using a steel plate cavity partition formed by an inner steel plate lining and an outer steel plate shell, allowing circulating water to effectively remove heat from the furnace. This not only ensures the furnace maintains a stable operating state under high-temperature conditions, preventing structural deformation or damage due to overheating and extending the furnace's service life, but also reduces the additional weight added by the castable refractory compared to traditional methods, lowering the requirements for the furnace's foundation support structure. This facilitates equipment installation and long-term stable operation, improving the overall reliability and safety of the equipment structure. The flow of water within the steel plate cavity partition achieves a more uniform heat dissipation effect, effectively preventing localized overheating. This allows the pyrolysis and gasification reaction within the furnace to proceed in a more stable and suitable temperature field, reducing the adverse effects of temperature fluctuations on the reaction process, improving reaction consistency and repeatability, and thus enhancing the gasifier's operational stability and processing efficiency. Furthermore, the use of a water jacket structure instead of traditional castable refractory effectively reduces costs. Attached Figure Description

[0021] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0023] Figure 1 This is a schematic diagram of an upward suction water jacket gasifier provided for some embodiments of the present invention.

[0024] Figure 2 A cross-sectional view of an upward-suction water-jacketed gasifier provided for some embodiments of this utility model.

[0025] In the diagram: 1. Support leg; 2. Bottom support; 3. Annular air duct; 4. Manhole; 5. Thermocouple; 6. Lifting lug; 7. Feed inlet; 8. Pneumatic valve; 9. Furnace top door; 10. Water outlet; 11. Gas outlet; 12. Level gauge; 13. Water inlet; 14. Steel pipe; 15. Steel plate cavity partition; 151. Inner steel plate furnace lining; 152. Outer steel plate furnace shell; 153. Furnace cavity; 16. Reinforcing rib; 17. Steel plate layer; 18. Insulation cotton; 19. Top sealing plate; 20. Explosion-proof vent; 21. Pressure gauge; 22. Agitator. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Example 1

[0028] like Figures 1 to 2 As shown, an upward-suction water-jacketed gasifier according to the first aspect of this utility model includes a furnace body, a stirring device 22, and a ventilation device.

[0029] The furnace body consists of an inner steel plate furnace lining 151, an outer steel plate furnace shell 152, a bottom support 2, and a top sealing plate 19. The internal space of the inner steel plate furnace lining 151 is the furnace cavity 153. The inner steel plate furnace lining 151 is fitted into the outer steel plate furnace shell 152, and the inner steel plate furnace lining 151 and the outer steel plate furnace shell 152 are spaced apart to form a steel plate cavity partition 15. There is circulating water in the steel plate cavity partition 15, thus forming a sealed water jacket of the furnace body. The bottoms of the inner steel plate furnace lining 151 and the outer steel plate furnace shell 152 are both connected to the top of the bottom support 2, and the tops of the inner steel plate furnace lining 151 and the outer steel plate furnace shell 152 are both connected to the top sealing plate 19. The bottom of the outer steel plate furnace shell 152 is provided with a water inlet 13, which is connected to the steel plate cavity partition 15. The top of the outer steel plate furnace shell 152 is provided with a water outlet 10, which is connected to the steel plate cavity partition 15. The circulating water adopts the form of bottom inlet and top outlet, which is used to cool the temperature of the inner steel plate furnace lining 151.

[0030] The top side of the furnace body is provided with a feed inlet 7, which is fed horizontally. The other side of the top of the furnace body is provided with a gas outlet 11, which is vented horizontally. Both the feed inlet 7 and the gas outlet 11 are connected to the furnace cavity 153. The feed inlet 7 and the gas outlet 11 are arranged horizontally on the furnace body to facilitate the input of materials and the output of gas.

[0031] The stirring device 22 is located at the top of the furnace body. The stirring device 22 includes a drive motor and a stirring rod. The output end of the drive motor is connected to the stirring rod. The stirring rod is installed vertically from the furnace top door 9 of the top sealing plate 19 into the furnace cavity 153. The drive motor drives the stirring rod to rotate, which is used to flatten or mix the materials in the furnace cavity evenly and improve the pyrolysis gasification efficiency.

[0032] A ventilation device is installed at the bottom of the furnace body, and the ventilation device is connected to the bottom of the furnace cavity 153. This ventilation device includes an annular air duct 3 and steel pipes 14. The annular air duct 3 surrounds the furnace body and has several air outlets. The air outlets of the steel pipes 14 are connected to the bottom of the furnace cavity 153 and are evenly arranged along the inner wall of the furnace cavity 153. Each air outlet of the annular air duct 3 is connected to an air inlet of each steel pipe 14. This allows for a uniform and stable air supply to the furnace cavity. The annular air duct 3 has two air inlets, arranged diagonally at 180°. The air inlets of the annular air duct 3 and the air outlets of the air supply equipment are connected by flanges, thus ensuring a stable air supply to the furnace cavity and providing the necessary oxygen and other gaseous conditions for the pyrolysis and gasification reaction. The steel pipes 14 are arranged in two layers along the height of the furnace body.

[0033] Usage and working principle:

[0034] First, open the water inlet valve 13 at the bottom of the outer steel plate furnace shell 152 to allow circulating water to flow into the steel plate cavity partition 15. Then, slowly open the top outlet valve 10 and adjust the water flow to a suitable range to ensure that the circulating water can flow smoothly from bottom to top to cool the temperature of the inner steel plate furnace lining 151. Monitor the inlet and outlet water temperatures in real time to ensure stable cooling effect.

[0035] Turn on the drive motor of the stirring device 22, set an appropriate stirring speed according to the material characteristics and process requirements, so that the stirring rod rotates in the furnace cavity 153, and spreads or mixes the subsequently added materials evenly, thereby improving the pyrolysis gasification efficiency.

[0036] Start the air supply equipment to allow air or other reaction gases to enter the air inlet of the annular air belt 3 through the flange connection. The gas enters the steel pipe 14 through the air outlet of the annular air belt 3, and then enters the furnace evenly from the bottom of the furnace chamber 153. According to the progress and needs of the pyrolysis gasification reaction, the oxidation-reduction atmosphere and gas flow rate in the furnace are controlled by adjusting the air volume or air pressure of the air supply equipment to provide suitable gas conditions for the reaction.

[0037] The prepared materials are evenly added into the furnace cavity 153 through the horizontally arranged feed port 7. The feeding speed should be reasonably controlled according to the furnace's processing capacity, material characteristics, and reaction status to avoid material accumulation or incomplete reaction due to excessive feeding, or production efficiency being affected by excessively slow feeding.

[0038] During the operation of the gasifier, the temperature, pressure, and other parameters within the furnace chamber 153 are monitored in real time. Based on the monitoring data, process parameters such as the flow rate and temperature of the circulating water in the water jacket, the rotation speed of the stirring device, the air volume and pressure of the ventilation device, and the feed rate are adjusted promptly to maintain the pyrolysis gasification reaction under optimal conditions, ensuring stable gas quality and the safe and stable operation of the equipment. For example, if the furnace temperature is too high, the circulating water flow rate can be appropriately increased or the ventilation volume reduced; if the material is not mixed evenly, the stirring speed can be appropriately increased.

[0039] Optionally, both the inner steel plate furnace lining 151 and the outer steel plate furnace shell 152 are circular, and the inner steel plate furnace lining 151 and the outer steel plate furnace shell 152 are concentrically arranged.

[0040] Optionally, multiple reinforcing ribs 16 are provided in the steel plate cavity partition 15. The multiple reinforcing ribs 16 divide the steel plate cavity partition 15 into several areas. Several water passage holes are opened on the reinforcing ribs 16. Adjacent areas are connected through the water passage holes. The reinforcing ribs 16 strengthen the structural strength of the steel plate cavity partition 15 while facilitating the flow of water inside the water jacket. Preferably, the reinforcing ribs 16 are in the form of rings.

[0041] Optionally, the top sealing plate 19 includes a steel plate layer 17 and insulation cotton 18. The tops of the inner steel plate furnace lining 151 and the outer steel plate furnace shell 152 are connected to the bottom of the steel plate layer 17, and the upper surface of the steel plate layer 17 is covered with insulation cotton 18.

[0042] Optionally, the bottom support 2 is provided with four support legs 1, which are evenly distributed on the edge of the bottom support 2 to support the furnace body; at the same time, a manhole door 4 is opened on the furnace body, which is connected to the furnace cavity 153 to facilitate personnel to inspect and maintain the inside of the furnace cavity.

[0043] Example 2

[0044] like Figures 1 to 2 As shown, an upward-suction water-jacketed gasifier includes all the contents of Embodiment 1, plus an emergency discharge device. The emergency discharge device includes a pneumatic valve 8 and a pressure gauge 21. The top sealing plate 19 has a pneumatic valve 8, which is connected to the furnace chamber 153. The pressure gauge 21 is installed on the furnace body to monitor the pressure inside the furnace chamber 153. The pneumatic valve 8 and the pressure gauge 21 are electrically connected. When the pressure gauge 21 detects that the pressure inside the furnace chamber 153 is greater than a set critical value, the pneumatic valve 8 automatically opens to release pressure for emergency discharge of combustible gas. The pneumatic valve 8 has an electric positioner.

[0045] An explosion-proof opening 20 is provided in the middle of the top sealing plate 19, which communicates with the furnace cavity 153. An end cap is provided on the explosion-proof opening 20, and the end cap is sealed and fastened to the explosion-proof opening 20. When the pressure is too high, the top end cap springs open to release pressure. When the pressure is insufficient to lift the end cap, the end cap automatically resets. Preferably, the end cap is a gravity-reset type end cap, which is usually installed on one side of the explosion-proof opening via a hinge or similar connecting device. When the pressure inside the furnace is too high, the pressure will lift the end cap, thereby opening the explosion-proof opening to release pressure. Once the pressure drops to a level insufficient to overcome the weight of the end cap itself, the end cap will automatically fall back to its original position under gravity, resealing the explosion-proof opening.

[0046] Thermocouples 5 are installed on the furnace body and are evenly arranged on both sides of the furnace body. The insertion holes of thermocouples 5 need to be pre-embedded with steel pipes. One end of the pre-embedded steel pipe is welded to the inner steel plate furnace lining 151, and the other end is welded to the outer steel plate furnace shell 152, penetrating the water jacket layer.

[0047] The furnace body is equipped with a level gauge 12, which includes a first level gauge and a second level gauge. The first level gauge is used to monitor the full material condition in the furnace cavity 153, and the second level gauge is used to monitor the material shortage condition in the furnace cavity 153.

[0048] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0049] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

Claims

1. A top-suction water-jacketed gasifier, characterized in that, Includes furnace body, stirring device (22) and ventilation device; The furnace body includes an inner steel plate lining (151), an outer steel plate shell (152), a bottom support (2), and a top sealing plate (19). The internal space of the inner steel plate lining (151) is a furnace cavity (153). The inner steel plate lining (151) is fitted inside the outer steel plate shell (152), and the inner steel plate lining (151) and the outer steel plate shell (152) are spaced apart to form a steel plate cavity partition (15). The bottom of the inner steel plate furnace lining (151) and the top of the outer steel plate furnace shell (152) are connected to the top sealing plate (19). The bottom of the outer steel plate furnace shell (152) is provided with a water inlet (13), which is connected to the steel plate cavity partition (15). The top of the outer steel plate furnace shell (152) is provided with a water outlet (10), which is connected to the steel plate cavity partition (15). The furnace body has a feed inlet (7) on one side of the top and a gas outlet (11) on the other side of the top. Both the feed inlet (7) and the gas outlet (11) are connected to the furnace cavity (153). The stirring device (22) includes a drive motor and a stirring rod. The output end of the drive motor is connected to the stirring rod. The stirring rod is axially inserted into the furnace cavity (153) from the top sealing plate (19). The ventilation device is provided at the bottom of the furnace body, and the ventilation device is connected to the bottom of the furnace cavity (153); The feed inlet (7) and the gas outlet (11) are both arranged laterally on the furnace body.

2. The upward-suction water-jacketed gasifier according to claim 1, characterized in that, The ventilation device includes an annular air belt (3) and steel pipes (14). The annular air belt (3) is arranged around the furnace body. Several air outlets are opened on the annular air belt (3). Several air outlets of the steel pipes (14) are connected to the bottom of the furnace cavity (153) and are evenly arranged along the inner wall of the furnace cavity (153). The air outlet of each annular air belt (3) is connected to the air inlet of each steel pipe (14).

3. The upward-suction water-jacketed gasifier according to claim 2, characterized in that, The annular air duct (3) has two air inlets, which are arranged diagonally at 180°. The air inlets of the annular air duct (3) and the air outlet of the air supply equipment are connected by a flange.

4. The upward-suction water-jacketed gasifier according to claim 1, characterized in that, It also includes an emergency discharge device, which includes a pneumatic valve (8) and a pressure gauge (21). The pneumatic valve (8) is provided on the top sealing plate (19). The pneumatic valve (8) is connected to the furnace cavity (153). The pressure gauge (21) is provided on the furnace body. The pressure gauge (21) is used to monitor the pressure in the furnace cavity (153). The pneumatic valve (8) and the pressure gauge (21) are electrically connected.

5. The upward-suction water-jacketed gasifier according to claim 1, characterized in that, An explosion-proof opening (20) is provided in the middle of the top sealing plate (19). The explosion-proof opening (20) is connected to the furnace cavity (153). An end cap is provided on the explosion-proof opening (20), and the end cap is sealed and fastened to the explosion-proof opening (20).

6. The upward-suction water-jacketed gasifier according to claim 1, characterized in that, The top sealing plate (19) includes a steel plate layer (17) and insulation cotton (18). The top of the inner steel plate furnace lining (151) and the outer steel plate furnace shell (152) are connected to the bottom of the steel plate layer (17). The upper surface of the steel plate layer (17) is covered with insulation cotton (18).

7. The upward-suction water-jacketed gasifier according to claim 1, characterized in that, The furnace body is equipped with thermocouples (5), which are evenly arranged on both sides of the furnace body.

8. The upward-suction water-jacketed gasifier according to claim 1, characterized in that, The furnace body is equipped with a level gauge (12), which includes a first level gauge and a second level gauge. The first level gauge is used to monitor the full material condition in the furnace cavity (153), and the second level gauge is used to monitor the material shortage condition in the furnace cavity (153).

9. A top-suction water-jacketed gasifier according to claim 1, characterized in that, It also includes a manhole door (4) and support legs (1). The bottom of the bottom support (2) is provided with four support legs (1). The four support legs (1) are evenly distributed on the edge of the bottom support (2). A manhole door (4) is opened on the furnace body. The manhole door (4) is connected to the furnace cavity (153).

10. A top-suction water-jacketed gasifier according to claim 1, characterized in that, It also includes reinforcing ribs (16), and multiple reinforcing ribs (16) are provided in the steel plate cavity partition (15). The multiple reinforcing ribs (16) divide the steel plate cavity partition (15) into several regions. Multiple water passage holes are provided on the reinforcing ribs (16), and adjacent regions are connected through the water passage holes.

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