Coal water slurry gasification wastewater blending combustion device

Abstract

The invention relates to the technical field of coal gasification, and discloses a coal water slurry gasification wastewater blending combustion device which comprises a furnace body, the furnace body comprises an ash storage bin located on the lower side, a reaction bin located in the middle and a blending bin located on the upper side, and the ash storage bin, the reaction bin and the blending bin are fixedly connected and vertically communicated; a coal adding pipe and a gas outlet pipe are fixedly installed on the surface of the mixing bin, a water distribution ring capable of sliding up and down is arranged in the mixing bin, a plurality of spraying holes are formed in the inner wall of a center hole of the water distribution ring, and a waste water jacket is fixedly installed on the surface of the reaction bin. The water distribution ring is arranged in the mixing bin, black / ash wastewater generated by coal water slurry gasification is added into a coal material of a reduction layer in the furnace through the water distribution ring, the wastewater is converted into water vapor, the water vapor is mixed with gas generated by coal dry distillation for a reduction reaction, and the wastewater is gradually evaporated before falling into a combustion layer, so that the contact time of the wastewater and the coal material of the reduction layer is prolonged in the process; the reduction reaction is more sufficient, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal gasification, and particularly relates to a device for co-firing water-coal slurry gasification wastewater. Background Art

[0002] Water-coal slurry gasification wastewater mainly comes from the washing black water of gasifiers, cyclone separators, and water washing towers. The black water is gradually concentrated through flash evaporation, and the solid content becomes larger and larger. In the settling tank, it is fully mixed and contacted with the flocculant. The solids settle to the bottom for sewage treatment, and the relatively clear ash water overflows into the ash water tank and is input into the system for recycling by the high-pressure ash water pump; the ash residue after being treated and filtered by the black / ash water system still contains about 30% - 50% of combustibles. Through co-firing treatment, this part of combustibles can be effectively utilized, and at the same time, pollution is reduced, which broadens and innovates the water-coal slurry pressurized gasification technology.

[0003] In the prior art, a patent document with the publication number CN107189820B discloses a composite gasification burner and process method for co-firing pulverized coal with high-concentration organic wastewater. By separately arranging the ignition gun of the burner outside, the pulverized coal feeding of the burner and the co-firing of wastewater are set as independent channels respectively, the ignition and start-up purge gas are in the same channel, the organic wastewater oxygen and the start-up oxygen are in the same channel, and the pulverized coal channel is arranged on the outer ring of the burner and other gasifier structure improvements are made to realize the co-firing process of organic wastewater in pulverized coal gasification. By co-firing an appropriate amount of organic wastewater, the pulverized coal can be sprayed alone or co-fired with the wastewater at the same time for combustion, which does not affect the operation of the original pulverized coal gasification combustion, solves the drawback of the single injection of pulverized coal by the burner, reduces the steam usage amount in the pulverized coal gasification process, and the burner can co-fire a certain proportion of wastewater according to the operating load when spraying pulverized coal, saving pulverized coal energy. At the same time, the steam formed by the high-concentration organic wastewater under high-temperature conditions and the steam and carbon dioxide generated by the combustion reaction further participate in the gasification reaction to generate syngas, realizing the sedimentation and recycling of organic wastewater.

[0004] In the process of the reduction reaction occurring in coal gasification equipment, the carbon dioxide generated by combustion reacts with coal to generate carbon monoxide and heat energy, and the coal and the co-fired water vapor react to generate hydrogen and heat energy. In the high-temperature environment inside the furnace, the co-fired wastewater quickly evaporates and rises, unable to fully contact with the coal, resulting in insufficient reduction reaction and reducing the coal gasification production efficiency. Based on this, the existing co-firing devices have the problem of insufficient contact between the incorporated wastewater and pulverized coal, seriously affecting the improvement of production efficiency and urgently needing to be solved. Summary of the Invention

[0005] The purpose of the present invention is to solve the drawback in the prior art that the existing co-firing devices have insufficient contact between the incorporated wastewater and pulverized coal, resulting in insufficient reduction reaction, and to propose a device for co-firing water-coal slurry gasification wastewater.

[0006] To achieve the above object, the present invention adopts the following technical solution: A device for co-firing coal water slurry gasification wastewater, comprising a furnace body, the furnace body includes an ash storage bin located at the lower side, a reaction bin located in the middle, and a mixing bin located at the upper side. The ash storage bin, the reaction bin, and the mixing bin are fixedly connected to each other and communicate vertically. A coal feeding pipe and an air outlet pipe are respectively fixedly installed on the surface of the mixing bin;

[0007] A water distribution ring that can slide up and down is arranged inside the mixing bin. A plurality of spraying holes are opened on the inner wall of the central hole of the water distribution ring. A wastewater jacket is fixedly installed on the surface of the reaction bin. A first water inlet pipe and a first water outlet pipe are respectively fixedly installed at the bottom of the wastewater jacket. A regulating component for driving the water distribution ring to act is arranged inside the wastewater jacket;

[0008] The regulating component includes a cylinder sleeve and a piston rod. The cylinder sleeve is fixedly installed on the inner top wall of the wastewater jacket. The piston rod is slidably installed inside the cylinder sleeve. The top end of the piston rod extends into the mixing bin and is fixedly connected to the water distribution ring. Flow guiding channels are arranged inside both the piston rod and the water distribution ring. A flow guiding inlet is opened on the surface of the piston rod. The flow guiding inlet is communicated with the plurality of spraying holes through the flow guiding channel. The lifting action of the water distribution ring is controlled by the regulating component, so that the water spraying action of the water distribution ring is controllable.

[0009] Preferably, the piston rod extends upward under the water pressure inside the wastewater jacket and pushes the water distribution ring upward. When the downward pressing force of the material in the mixing bin on the water distribution ring is greater than the upward acting force of the piston rod on the water distribution ring, the bottom end of the piston rod extends out of the lower port of the cylinder sleeve, and the inner cavity of the wastewater jacket is communicated with the flow guiding channel through the flow guiding inlet.

[0010] An overflow cover is fixedly installed at the upper end of the wastewater jacket. An overflow pipe is fixedly installed on the surface of the overflow cover. A pressure relief valve is fixedly installed at the upper end of the wastewater jacket. The pressure relief valve is communicated with the inner cavity of the wastewater jacket. The input pressure of the wastewater jacket is fixed, realizing the function of automatically controlling the opening and closing of the water distribution ring according to the amount of material above the water distribution ring.

[0011] Preferably, a driving motor is fixedly installed on the top wall of the mixing bin. The rotating shaft of the driving motor extends downward, and a cloth distributing disk is fixedly installed at the bottom end of the rotating shaft of the driving motor. A plurality of convex partitions are fixedly installed on the upper surface of the cloth distributing disk. A funnel-shaped partition cover is fixedly installed inside the mixing bin. The outlet end of the coal feeding pipe is communicated with the upper end of the partition cover. The lower port of the partition cover extends above the cloth distributing disk.

[0012] The upper opening of the water distribution ring is of a conical structure. The lower end of the water distribution ring extends into the reaction bin, and the lower end of the water distribution ring is in sliding contact with the inner wall of the reaction bin. As the water distribution ring moves up and down, the gap between the water distribution ring and the cloth distributing disk becomes smaller or larger, realizing the function of closed-loop control of feeding and wastewater co-firing.

[0013] Preferably, an air guide hood is fixedly installed inside the ash storage bin. A grate plate is arranged above the air guide hood. A gas supply pipe is fixedly installed on the surface of the ash storage bin and is communicated with the air guide hood. A plurality of air supply holes communicated with the inner cavity of the air guide hood are formed in the upper surface of the ash storage bin. A hydraulic motor is fixedly installed inside the air guide hood, and the rotating end of the hydraulic motor is fixedly connected with the grate plate. A ash discharge valve is fixedly installed at the bottom of the ash storage bin. Opening the ash discharge valve facilitates the periodic discharge of the furnace ash in the ash storage bin.

[0014] Preferably, the bottom end of the reaction chamber extends above the grate plate, and an ash discharge gap is reserved between the bottom end of the reaction chamber and the grate plate. A ash falling port is formed at a position far from the center on the upper surface of the grate plate. When the hydraulic motor drives the grate plate to rotate, the furnace ash above the grate plate falls into the lower side of the grate plate through the ash falling port. The materials in the reaction chamber and the mixing chamber fall downward, reducing the materials above the water distribution ring and the downward pressing force on the water distribution ring. The linkage piston rod moves upward, closing the diversion inlet and cutting off the injection of waste water into the reaction chamber.

[0015] Preferably, a boiler jacket is also fixedly installed on the surface of the reaction chamber. A second water inlet pipe and a second water outlet pipe are respectively fixedly installed on the surface of the boiler jacket. The waste water jacket and the boiler jacket are separately arranged to avoid waste water polluting the cooling water. Both the waste water jacket and the boiler jacket play a role in cooling the reaction chamber.

[0016] The present invention has the following beneficial effects:

[0017] 1. For the co-firing device proposed by the present invention, by arranging a water distribution ring in the mixing chamber, the black / gray waste water generated by water coal gasification is added to the coal material in the reduction layer of the furnace through the water distribution ring. The waste water is converted into water vapor and mixed with the gas generated by coal dry distillation to undergo a reduction reaction. The waste water is gradually evaporated before falling to the combustion layer. During this process, the contact time with the coal material in the reduction layer is prolonged, making the reduction reaction more complete, improving the production efficiency. The combustibles in the waste water participate in combustion, releasing heat energy, and the incombustible residues generated are discharged with the furnace ash, facilitating pollution control.

[0018] 2. For the co-firing device proposed by the present invention, by arranging a regulation component in the waste water jacket and using the regulation component to control the lifting action of the water distribution ring. When there is more coal material above the water distribution ring, the piston rod is pressed downward to open the diversion inlet. When there is less coal material above the water distribution ring, the piston rod moves upward to close the diversion inlet, thereby realizing the automatic control of the opening and closing of the water distribution ring according to the change of the coal material amount in the furnace.

[0019] 3. The blending device proposed in the present invention arranges a distribution disk in the blending bin, and utilizes the rotating centrifugal force of the distribution disk to input the coal in the separation cover into the upper side of the water distribution ring. When the distribution disk stops rotating, the coal falling from the separation cover decreases. As the combustion of coal in the furnace decreases, the coal on the upper side of the water distribution ring will gradually decrease. Since the lifting and lowering of the piston rod is controlled by the water pressure in the wastewater jacket, when the diversion inlet is closed, the water pressure in the wastewater jacket increases. By detecting the water pressure parameter in the wastewater jacket, when the water pressure parameter reaches a preset threshold, the drive motor is started in linkage to automatically feed the upper side of the water distribution ring. When the coal on the upper side of the water distribution ring increases, the water distribution ring is automatically opened, the diversion inlet is opened, the water pressure in the wastewater jacket is reduced, and the drive motor is stopped in linkage, thereby realizing the closed-loop control function of feeding and wastewater blending.

[0020] 4. In the process of using the blending device proposed in the present invention, the ash on the upper side of the grate plate falls from the ash outlet to the lower side of the grate plate, and the materials in the reaction chamber and the blending chamber fall downward, so that the material on the upper side of the water distribution ring is reduced, and the automatic closing of the diversion inlet is realized. The device can be used to control the opening and closing rhythm of the water distribution ring through the falling speed of the ash. Since different qualities of coal have different combustion speeds, the amount of ash produced is also different. This design provides conditions for the differentiated processing of different qualities of coal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The three-dimensional structure of the mixing and burning device proposed by the present invention is shown in FIG. Figure 1 ;

[0022] Figure 2 The three-dimensional structure of the mixing and burning device proposed by the present invention is shown in FIG. Figure 2 ;

[0023] Figure 3 The cross-sectional structure of the mixing device proposed by the present invention is shown in FIG. Figure 1 ;

[0024] Figure 4 The cross-sectional structure of the mixing device proposed by the present invention is shown in FIG. Figure 2 ;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the water distribution ring proposed by the present invention;

[0026] Figure 6 This is a schematic diagram of the front cross-section structure of the water distribution ring proposed in the present invention.

[0027] In the figure: 1 ash storage bin, 2 reaction bin, 3 blending bin, 4 coal feeding pipe, 5 gas outlet pipe, 6 water distribution ring, 7 spraying holes, 8 waste water jacket, 9 first water inlet pipe, 10 first water outlet pipe, 11 cylinder liner, 12 piston rod, 13 diversion inlet, 14 overflow hood, 15 overflow pipe, 16 driving motor, 17 cloth distributing plate, 18 partition hood, 19 air guiding hood, 20 gas supply pipe, 21 hydraulic motor, 22 ash discharging valve, 23 ash falling opening, 24 boiler jacket, 25 second water inlet pipe, 26 second water outlet pipe, 27 pressure relief valve, 28 grate plate. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0030] Refer to Figures 1-6 , a device for co-firing water slurry gasification wastewater, including a furnace body. The furnace body includes an ash storage bin 1 located on the lower side, a reaction bin 2 located in the middle, and a blending bin 3 located on the upper side. The ash storage bin 1, the reaction bin 2, and the blending bin 3 are fixedly connected to each other and communicate up and down. A coal feeding pipe 4 and a gas outlet pipe 5 are respectively fixedly installed on the surface of the blending bin 3.

[0031] A water distribution ring 6 that can slide up and down is arranged inside the blending bin 3. A plurality of spraying holes 7 are opened on the inner wall of the central hole of the water distribution ring 6. A waste water jacket 8 is fixedly installed on the surface of the reaction bin 2. A first water inlet pipe 9 and a first water outlet pipe 10 are respectively fixedly installed at the bottom of the waste water jacket 8. A boiler jacket 24 is also fixedly installed on the surface of the reaction bin 2. A second water inlet pipe 25 and a second water outlet pipe 26 are respectively fixedly installed on the surface of the boiler jacket 24.

[0032] Among them, the black / grey water generated by water slurry gasification is input into the waste water jacket 8 through the first water inlet pipe 9 and then discharged from the first water outlet pipe 10, realizing the cyclic input of waste water into the waste water jacket 8 to prevent precipitation, and inputting cooling water into the boiler jacket 24. Both the waste water jacket 8 and the boiler jacket 24 play a role in cooling the reaction bin 2.

[0033] Inside the wastewater jacket 8, a regulating component for driving the water replenishing ring 6 to act is provided. Specifically, the regulating component includes a cylinder liner 11 and a piston rod 12. The cylinder liner 11 is fixedly installed on the inner top wall of the wastewater jacket 8, the piston rod 12 is slidably installed inside the cylinder liner 11, the top end of the piston rod 12 extends into the blending bin 3 and is fixedly connected to the water distribution ring 6. Flow guiding channels are provided inside both the piston rod 12 and the water distribution ring 6. A flow guiding inlet 13 is formed on the surface of the piston rod 12, and the flow guiding inlet 13 is communicated with a plurality of spraying holes 7 through the flow guiding channel. For details, see Figure 5 , when the piston rod 12 slides and retracts into the cylinder liner 11, the inner wall of the cylinder liner 11 blocks the flow guiding inlet 13. When the lower end of the piston rod 12 extends out of the cylinder liner 11, the flow guiding inlet 13 is gradually opened.

[0034] Refer to Figure 6 , wastewater with a fixed pressure is input into the wastewater jacket 8. The piston rod 12 extends upward under the water pressure inside the wastewater jacket 8 and pushes the water distribution ring 6 to move upward. When the downward pressure force of the material in the blending bin 3 on the water distribution ring 6 is greater than the upward force of the piston rod 12 on the water distribution ring 6, the bottom end of the piston rod 12 extends out of the lower port of the cylinder liner 11. The inner cavity of the wastewater jacket 8 is communicated with the flow guiding channel through the flow guiding inlet 13, and the wastewater sprays out from the spraying holes 7 to wet the coal material passing through the water distribution ring 6.

[0035] An overflow cover 14 is fixedly installed at the upper end of the wastewater jacket 8. An overflow pipe 15 is fixedly installed on the surface of the overflow cover 14. A pressure relief valve 27 is fixedly installed at the upper end of the wastewater jacket 8. The pressure relief valve 27 is communicated with the inner cavity of the wastewater jacket 8. The steam or wastewater overflowing from the wastewater jacket 8 enters the overflow cover 14 and is discharged through the overflow pipe 15.

[0036] In this embodiment, see Figure 2 , a driving motor 16 is fixedly installed on the top wall of the blending bin 3. The rotating shaft of the driving motor 16 extends downward, and a cloth distributing plate 17 is fixedly installed at the bottom end of the rotating shaft of the driving motor 16. A plurality of convex partitions are fixedly installed on the upper surface of the cloth distributing plate 17. A funnel-shaped partition cover 18 is fixedly installed inside the blending bin 3. The outlet end of the coal feeding pipe 4 is communicated with the upper end of the partition cover 18. The lower port of the partition cover 18 extends to the upper side of the cloth distributing plate 17. A pressure sensor for controlling the start and stop of the driving motor 16 is arranged inside the wastewater jacket 8.

[0037] The upper opening of the water distribution ring 6 is of a conical structure. The lower end of the water distribution ring 6 extends into the reaction chamber 2, and the lower end of the water distribution ring 6 is in sliding contact with the inner wall of the reaction chamber 2. As the water distribution ring 6 moves up and down, the gap between the water distribution ring 6 and the cloth distributing plate 17 becomes smaller or larger.

[0038] As Figure 4 shown, the coal material is input into the partition cover 18 through the coal feeding pipe 4. The coal material enters the reaction chamber 2 through the gap between the water distribution ring 6 and the cloth distributing plate 17, and the reaction chamber 2 is filled with coal material.

[0039] Reference Figure 3 Inside the ash storage bin 1, an air guide cover 19 is fixedly installed. Above the air guide cover 19, a grate plate 28 is provided. On the surface of the ash storage bin 1, an air supply pipe 20 is fixedly installed. The air supply pipe 20 is communicated with the air guide cover 19. A plurality of air supply holes communicating with the inner cavity of the air guide cover 19 are opened on the upper surface of the ash storage bin 1.

[0040] Inside the air guide cover 19, a hydraulic motor 21 is fixedly installed. The rotating end of the hydraulic motor 21 is fixedly connected with the grate plate 28. At the bottom of the ash storage bin 1, an ash discharge valve 22 is fixedly installed.

[0041] During the use process, as Figure 4 shown, oxygen is input into the grate plate 28 through the air supply pipe 20. The coal material above the grate plate 28 undergoes an incomplete combustion reaction. Heat and gas are generated by combustion decomposition. The high-temperature gas passes through the coal material in the reduction layer. The moisture in the coal material in the reduction layer evaporates to generate water vapor. In the reduction layer, coal, gas, and water vapor undergo a reduction reaction to generate coal gas. The coal gas is discharged from the gas outlet pipe 5 for subsequent treatment. The furnace ash generated by the combustion of the coal material enters the ash storage bin 1.

[0042] Specifically, since the bottom end of the reaction chamber 2 extends above the grate plate 28, an ash discharge gap is reserved between the bottom end of the reaction chamber 2 and the grate plate 28. A ash falling port 23 is opened at a position far from the center on the upper surface of the grate plate 28. When the hydraulic motor 21 drives the grate plate 28 to rotate, the furnace ash above the grate plate 28 falls to the lower side of the grate plate 28 through the ash falling port 23. The materials in the reaction chamber 2 and the mixing chamber 3 fall downward, reducing the materials above the water distribution ring 6.

[0043] By arranging a regulation component in the waste water jacket 8 and using the regulation component to control the lifting action of the water distribution ring 6. When there is more coal material above the water distribution ring 6, the piston rod 12 is pressed down to open the diversion inlet 13, and the water distribution ring 6 sprays water on the coal material. When there is less coal material above the water distribution ring 6, the piston rod 12 moves upward to close the diversion inlet 13, so as to realize automatically controlling the opening and closing of the water distribution ring 6 according to the change of the coal material amount in the furnace.

[0044] By arranging a distribution disk 17 in the mixing bin 3 and utilizing the rotating centrifugal force of the distribution disk 17, the coal in the separation cover 18 can be input to the upper side of the water distribution ring 6. When the distribution disk 17 stops rotating, the coal falling from the separation cover 18 will also decrease. As the combustion of coal in the furnace decreases, the coal on the upper side of the water distribution ring 6 falls and gradually decreases. Since the lifting and lowering of the piston rod 12 is controlled by the water pressure in the wastewater jacket 8, and the input pressure of the first water inlet pipe 9 remains unchanged, when the diversion inlet 13 is closed, the water pressure in the wastewater jacket 8 increases, and the water pressure parameter in the wastewater jacket 8 is detected by the pressure sensor. When the water pressure parameter reaches the preset threshold, the drive motor 16 is linked to start, and the upper side of the water distribution ring 6 is automatically fed. When the coal on the upper side of the water distribution ring 6 increases, the water distribution ring 6 is automatically opened, the diversion inlet 13 is opened, the water pressure in the wastewater jacket 8 is reduced, and the linkage drive motor 16 is stopped, thereby realizing the closed-loop control function of feeding and wastewater blending.

[0045] During use, the grate plate 28 is in a non-rotating state, and the ash on the upper side of the grate plate 28 will slowly fall into the lower side of the grate plate 28 from the ash dropping port 23, and the materials in the reaction chamber 2 and the mixing chamber 3 will fall downward, reducing the material on the upper side of the water distribution ring 6, thereby achieving automatic closing of the diversion inlet 13. The device can be used to control the opening and closing rhythm of the water distribution ring 6 by the falling speed of the ash. Since different qualities of coal have different combustion speeds, the amount of ash produced is also different. This design provides conditions for differentiated processing of different qualities of coal.

[0046] The blending device proposed in the present invention has a water distribution ring 6 arranged in the blending bin 3. The black / ash wastewater generated by the gasification of the water-coal slurry is added to the coal material in the reduction layer of the furnace by the water distribution ring 6. The wastewater is converted into water vapor and mixed with the gas generated by the coal dry distillation to produce a reduction reaction. The wastewater is gradually evaporated before falling into the combustion layer. This process prolongs the contact time with the coal material in the reduction layer, making the reduction reaction more complete and improving the production efficiency. The combustibles in the wastewater participate in the combustion and release heat energy. The generated incombustible residues are discharged with the furnace ash, which provides convenience for pollution control. The treatment of the furnace ash refers to: Yin Hongfeng, Tang Yun, Ren Yun, et al. Basic Characteristics and Application Research of Texaco Gasifier Slag [J]. Coal Conversion, 2009, 32(4): 30-33.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for co-firing coal water slurry gasification wastewater, comprising a furnace body, characterized in that: The furnace body includes an ash storage bin (1) located at the lower side, a reaction bin (2) located in the middle, and a blending bin (3) located at the upper side. The ash storage bin (1), the reaction bin (2), and the blending bin (3) are fixedly connected to each other and communicate vertically. A coal feeding pipe (4) and an air outlet pipe (5) are fixedly installed on the surface of the blending bin (3) respectively; A water distribution ring (6) that can slide up and down is arranged inside the blending bin (3). A plurality of spraying holes (7) are formed in the inner wall of the central hole of the water distribution ring (6). A waste water jacket (8) is fixedly installed on the surface of the reaction bin (2). A first water inlet pipe (9) and a first water outlet pipe (10) are fixedly installed at the bottom of the waste water jacket (8) respectively. A regulating component for driving the water distribution ring (6) to act is arranged inside the waste water jacket (8); The regulating component includes a cylinder sleeve (11) and a piston rod (12). The cylinder sleeve (11) is fixedly installed on the inner top wall of the waste water jacket (8). The piston rod (12) is slidably installed inside the cylinder sleeve (11). The top end of the piston rod (12) extends into the blending bin (3) and is fixedly connected to the water distribution ring (6). Flow guiding channels are arranged inside both the piston rod (12) and the water distribution ring (6). A flow guiding inlet (13) is formed on the surface of the piston rod (12). The flow guiding inlet (13) is communicated with the plurality of spraying holes (7) through the flow guiding channel.

2. The water slurry gasification wastewater co-firing device according to claim 1, characterized in that: The piston rod (12) extends upward under the action of the water pressure inside the waste water jacket (8) and pushes the water distribution ring (6) to move upward. When the downward pressing force of the material in the blending bin (3) on the water distribution ring (6) is greater than the upward acting force of the piston rod (12) on the water distribution ring (6), the bottom end of the piston rod (12) extends out of the lower port of the cylinder sleeve (11), and the inner cavity of the waste water jacket (8) is communicated with the flow guiding channel through the flow guiding inlet (13).

3. A coal water slurry gasification wastewater co-firing device according to claim 2, characterized in that: An overflow cover (14) is fixedly installed at the upper end of the waste water jacket (8). An overflow pipe (15) is fixedly installed on the surface of the overflow cover (14). A pressure relief valve (27) is fixedly installed at the upper end of the waste water jacket (8). The pressure relief valve (27) is communicated with the inner cavity of the waste water jacket (8).

4. The water slurry gasification wastewater co-firing device according to claim 3, wherein: A driving motor (16) is fixedly installed on the top wall of the blending bin (3). The rotating shaft of the driving motor (16) extends downward, and a cloth distributing plate (17) is fixedly installed at the bottom end of the rotating shaft of the driving motor (16). A plurality of convex partitions are fixedly installed on the upper surface of the cloth distributing plate (17). A funnel-shaped partition cover (18) is fixedly installed inside the blending bin (3). The outlet end of the coal feeding pipe (4) is communicated with the upper end of the partition cover (18). The lower port of the partition cover (18) extends to the upper side of the cloth distributing plate (17).

5. The water slurry gasification wastewater co-firing device according to claim 4, characterized in that: The upper opening of the water distribution ring (6) is of a conical structure. The lower end of the water distribution ring (6) extends into the reaction bin (2), and the lower end of the water distribution ring (6) is in sliding contact with the inner wall of the reaction bin (2). As the water distribution ring (6) moves up and down, the gap between the water distribution ring (6) and the cloth distributing plate (17) becomes smaller or larger.

6. The water coal slurry gasification wastewater co-firing device according to claim 5, characterized in that: An air guiding hood (19) is fixedly installed inside the ash storage bin (1). A grate plate (28) is arranged on the upper side of the air guiding hood (19). A gas supply pipe (20) is fixedly installed on the surface of the ash storage bin (1). The gas supply pipe (20) is communicated with the air guiding hood (19). A plurality of air supply holes communicated with the inner cavity of the air guiding hood (19) are formed in the upper surface of the ash storage bin (1).

7. A coal water slurry gasification wastewater co-firing device according to claim 6, characterized in that: A hydraulic motor (21) is fixedly installed inside the air guiding hood (19). The rotating end of the hydraulic motor (21) is fixedly connected with the grate plate (28). A ash discharge valve (22) is fixedly installed at the bottom of the ash storage bin (1).

8. A water-coal slurry gasification wastewater co-firing device according to claim 7, characterized in that: The bottom end of the reaction chamber (2) extends to the upper side of the grate plate (28). A ash discharge gap is reserved between the bottom end of the reaction chamber (2) and the grate plate (28). A ash falling port (23) is formed in the upper surface of the grate plate (28) away from the center. When the hydraulic motor (21) drives the grate plate (28) to rotate, the furnace ash on the upper side of the grate plate (28) falls into the lower side of the grate plate (28) through the ash falling port (23). The materials in the reaction chamber (2) and the mixing chamber (3) fall downward, reducing the materials on the upper side of the water distribution ring (6).

9. The water coal slurry gasification wastewater co-firing device according to claim 8, characterized in that: A boiler jacket (24) is also fixedly installed on the surface of the reaction chamber (2). A second water inlet pipe (25) and a second water outlet pipe (26) are respectively fixedly installed on the surface of the boiler jacket (24).

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