A waste heat boiler gasifier

Abstract

This utility model discloses a waste boiler gasifier, relating to the technical field of coal slurry gasification equipment. It includes a gasification chamber for performing a coal-water gasification reaction. A waste boiler connecting pipe extends from the lower end of the gasification chamber, connecting the gasification chamber and the waste boiler chamber, which receives the syngas generated in the gasification chamber. A cooling pipe wall is located outside the gasification chamber, with a first water-cooling pipe and a second water-cooling pipe extending inside. The second water-cooling pipe extends into the waste boiler connecting pipe, and the first and second water-cooling pipes are used to cool the syngas. A water spray pipe is installed inside the waste boiler connecting pipe to spray water mist onto the waste boiler connecting pipe for dust suppression of the syngas. Existing waste boiler coal gasifiers have ash accumulation in the upper slag inlet section, affecting the output of waste boiler steam. This application solves the technical problem that opening water spray holes on the waste boiler wall easily leads to uneven heating of the waste boiler wall surface, and the stress generated by the temperature difference causes deformation of the waste boiler water-cooled wall.

Description

Technical Field

[0001] This utility model relates to the technical field of coal slurry gasification equipment, and in particular to a waste boiler gasification furnace. Background Technology

[0002] Waste boiler gasification technology has become one of the mainstream technologies for clean coal gas production. The main raw materials in the coal gasification reaction are dry coal powder or coal-water slurry and gasifying agent. The raw materials are mixed in the gasification chamber, and the mixture is burned and gasified through the burner at the top of the gasification chamber. After the coal slurry gasification reaction is completed, the gasification chamber transports the syngas generated by the reaction to the waste boiler chamber. The waste boiler chamber recovers the heat carried by the syngas. However, during the transportation of syngas, overheated ash is easy to adhere to the inner wall of the waste boiler chamber, thus affecting the progress of the coal slurry gasification reaction and heat recovery process. The current method of flying into the waste boiler chamber is to open several water spray holes on its inner wall to spray water mist into the syngas in the waste boiler chamber. However, in actual production, the temperature of the area with water spray holes on the side wall of the waste boiler chamber is lower, and the side wall of the waste boiler chamber is prone to deformation due to uneven heating.

[0003] In summary, developing a waste boiler gasifier that can settle ash particles in syngas without affecting the waste boiler wall structure is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a waste boiler gasifier that solves the technical problem that during the transfer of syngas, ash particles carried by the gas adhere to the side wall of the waste boiler chamber, affecting the reaction rate of the waste boiler gasifier.

[0005] To achieve the above objectives, this utility model provides a waste boiler gasification furnace, comprising:

[0006] The gasification chamber is used for the water-coal gasification reaction. A waste boiler pipe extends from the lower end of the gasification chamber and enters into the waste boiler chamber to connect the gasification chamber and the waste boiler chamber. The waste boiler chamber is used to receive the syngas generated by the gasification chamber.

[0007] The cooling pipe wall is located outside the gasification chamber. A first water-cooled pipe and a second water-cooled pipe extend inside the cooling pipe wall, and the second water-cooled pipe extends into the waste heat boiler inlet. The first water-cooled pipe and the second water-cooled pipe are used to cool the syngas. A water spray pipe is provided inside the waste heat boiler inlet to spray water mist onto the waste heat boiler inlet to reduce dust in the syngas.

[0008] Preferably, the first water-cooled pipe, the second water-cooled pipe, and the spray pipe are all parallel to the axis of the gasification chamber. Adjacent first water-cooled pipes and second water-cooled pipes are connected by U-shaped elbows. A liquid distribution ring is provided above the waste boiler pipe, and the liquid distribution ring is connected to each spray pipe.

[0009] Preferably, a water spray tank and a coolant outlet tank are provided at the connection between the gasification chamber and the waste heat boiler inlet pipe. The water spray tank is connected to each water spray pipe to supply dust suppression liquid to the water spray pipe. The coolant outlet tank is connected to the first water cooling pipe and the second water cooling pipe to supply coolant to the first water cooling pipe and the second water cooling pipe. A coolant collection tank is provided at the end of the gasification chamber away from the waste heat boiler inlet pipe. The coolant collection tank is used to collect the coolant after heat absorption.

[0010] Preferably, both the gasification chamber and the waste heat chamber are located within the inner cavity of the housing shell, and the end of the housing shell facing away from the gasification chamber is provided with a discharge port for outputting the syngas generated by the reaction.

[0011] Preferably, an exhaust pipe extends from the end of the waste heat boiler chamber away from the gasification chamber, a water bath is provided above the discharge port, the water bath stores dust-suppressing liquid, the exhaust pipe extends into the water bath, and a gas supply pipe is connected to the top of the water bath, extending into the discharge port.

[0012] Preferably, a fixed cover plate is provided on the outer periphery of the waste boiler connector, the fixed cover plate abuts against the port of the waste boiler chamber, and the fixed cover plate is used to limit the depth of the waste boiler connector extending into the waste boiler chamber.

[0013] Preferably, a baffle is provided vertically on the edge of the fixed cover plate away from the waste pot pipe. The baffle, the fixed cover plate, and the side wall of the waste pot pipe form a receiving groove. The receiving groove is filled with refractory fiber, which is used to seal the gap between the waste pot pipe and the waste pot chamber.

[0014] Preferably, the sidewall of the water spray pipe is evenly provided with a number of water spray holes, the length of the section of the water spray pipe with water spray holes is 0.7 to 0.9 times the length of the waste boiler connecting pipe, and the diameter of the water spray holes is 2 to 10 mm.

[0015] Preferably, a pressure valve is provided on the outer wall of the housing, and the pressure valve fills the inner cavity of the housing with high-pressure gas. The high-pressure gas is used to balance the pressure difference between the inside and outside of the cooling pipe wall and the waste boiler pipe.

[0016] Preferably, the upper end of the gasification chamber is provided with a burner for carrying out coal slurry gasification reaction. The end connecting the gasification chamber to the waste boiler pipe and the end connecting the waste boiler chamber to the exhaust pipe are provided with a tapering section, and the tapering direction of the tapering section is away from the burner. The diameter to length ratio of the waste boiler pipe is in the range of 0.25 to 1.

[0017] Compared to the aforementioned background technology, the waste heat boiler gasifier provided by this utility model includes a gasification chamber for carrying out a water-coal gasification reaction. A waste heat boiler pipe is provided at the lower port of the gasification chamber, and a waste heat boiler chamber is located below the gasification chamber. When the upper port of the waste heat boiler chamber is connected to the lower port of the gasification chamber, the waste heat boiler pipe extends into the waste heat boiler chamber. The gasification chamber transports the syngas generated by the reaction to the waste heat boiler chamber through the waste heat boiler pipe. A cooling pipe wall is provided on the outer periphery of the gasification chamber for cooling the syngas generated by the reaction. A first cooling pipe wall is provided inside the cooling pipe wall. The first and second water-cooled pipes are filled with circulating coolant to absorb the waste heat of the syngas. The second water-cooled pipe extends into the waste heat boiler inlet pipe to further cool the syngas before it enters the waste heat boiler chamber. In addition, several water spray pipes are installed inside the waste heat boiler inlet pipe. Each water spray pipe sprays water mist into the inner cavity of the waste heat boiler inlet pipe. The water mist adsorbs ash particles in the syngas, causing the ash particles to agglomerate and preventing them from adhering to the outer wall of the waste heat boiler chamber, which would affect the water-coal gasification reaction. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of the waste boiler gasification furnace provided in an embodiment of the present utility model;

[0020] Figure 2 A cross-sectional view AA provided for an embodiment of this utility model;

[0021] Figure 3 This is a BB cross-sectional view provided for an embodiment of the present utility model;

[0022] Figure 4 This is a partial enlarged view of region C provided in an embodiment of the present utility model;

[0023] Figure 5 This is a structural diagram of the water spray pipe provided in an embodiment of the present utility model.

[0024] Among them, 1-gasification chamber; 2-waste boiler chamber; 21-exhaust pipe; 3-waste boiler connection pipe; 31-water spray pipe; 32-dust-suppressing liquid inlet pipe; 33-water spray hole; 41-first water-cooling pipe; 42-second water-cooling pipe; 43-coolant inlet pipe; 44-coolant outlet pipe; 5-containment shell; 51-discharge port; 6-water bath; 61-gas transmission pipe; 7-fixed cover plate; 71-baffle; 72-refractory fiber; 8-burner. Detailed Implementation

[0025] 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.

[0026] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] This utility model provides a waste boiler gasification furnace; please refer to the appendix to the instruction manual. Figure 1 To be continued Figure 3 This application includes a gasification chamber 1 for carrying out a water-coal gasification reaction. A waste heat boiler connector 3 is provided at the lower end of the gasification chamber 1, coaxially arranged with the gasification chamber 1 and communicating with its inner cavity. A waste heat boiler chamber 2 is provided below the gasification chamber 1, used to recover the heat carried by the syngas. When the lower end of the gasification chamber 1 and the upper end of the waste heat boiler chamber 2 are connected, the waste heat boiler connector 3 extends into the waste heat boiler chamber 2. Furthermore, a cooling pipe wall is provided on the outer periphery of the gasification chamber 1, and a first water-cooling pipe 41 and a second water-cooling pipe 42 are provided within the cooling pipe wall. Cooling liquid circulates within the first water-cooling pipe 41 and the second water-cooling pipe 42. The first water-cooling pipe 41 is only distributed on the outer periphery of the gasification chamber 1, while the second water-cooling pipe 42 extends from the outer periphery of the gasification chamber 1 into the waste heat boiler connector 3. 42 allows the coolant to flow through the waste boiler inlet pipe 3, providing secondary cooling for the syngas about to enter the waste boiler chamber 2. In addition, a water spray pipe 31 is installed inside the waste boiler inlet pipe 3, which extends into the waste boiler chamber 2 along with the waste boiler inlet pipe 3. After the gasification chamber 1 delivers the syngas to the mounting plate, the water spray pipe 31 sprays dust-suppressing liquid into the inner cavity of the waste boiler inlet pipe 3. Because the second water cooling pipe 42 provides secondary cooling for the syngas, the temperature of the ash and slag in the syngas decreases, reducing the adhesion of the ash and slag. The ash and slag float in the syngas. When the dust-suppressing liquid spray is injected into the syngas, the dust-suppressing liquid adsorbs the floating ash and slag. When the ash and slag agglomerate to a certain size, the ash and slag fall to the bottom of the waste boiler chamber 2, completing the dust suppression operation for the syngas and preventing the ash and slag from flowing with the syngas in the waste boiler chamber 2 and adhering to the inner wall of the waste boiler.

[0028] Preferably, the first water-cooling pipe 41, the second water-cooling pipe 42, and the water spray pipe 31 are all parallel to the axis of the gasifier, and the three are evenly arranged around the outer periphery of the axis of the gasifier. The ports of adjacent first water-cooling pipes 41 and second water-cooling pipes 42 are connected by U-shaped elbows. Furthermore, a liquid distribution ring is provided inside the waste heat boiler pipe 3. The liquid distribution ring is located at the connection between the gasification chamber 1 and the waste heat boiler pipe 3. The liquid distribution ring is coaxially arranged with the gasification chamber 1. Furthermore, each water spray pipe 31 is connected to the liquid distribution ring, and the water spray pipe 31 is located on the side of the liquid distribution ring away from the gasification chamber 1. If each water spray pipe 31 adopts the same connection method as the first water cooling pipe 41 and the second water cooling pipe 42, and the ports of adjacent water spray pipes 31 are connected by a U-shaped pipe, the dust-suppressing liquid flows through each water spray pipe 31 in this way. During the process, the water pressure of the dust-suppressing liquid is released sequentially through the water spraying process. When the dust-suppressing liquid flows to the water spray pipe 31 that is far away from the dust-suppressing liquid inlet, the spraying range and spraying volume of the water spray pipe 31 are lower than those of the water spray pipe 31 that is close to the inlet. This results in a decrease in the dust suppression effect in some areas inside the waste chamber pipe 3, causing ash and slag to adhere to the inner wall of the waste boiler chamber 2.

[0029] When the dust-suppressing liquid is sprayed through the water spray pipe 31, the dust-suppressing liquid is pre-filled in the distribution ring. After the distribution ring is completely filled, the continuously supplied dust-suppressing liquid overflows into each water spray pipe 31. Then, the water pressure causes the dust-suppressing liquid to be sprayed out from the water spray pipe 31. Since each dust-suppressing liquid is diverted from the distribution ring, the water pressure in each water spray pipe 31 is equal, so that each water spray pipe 31 is evenly sprayed with dust-suppressing liquid water mist onto the waste boiler connector 3, ensuring the stability of the dust suppression effect of this application.

[0030] Furthermore, a coolant output pipe 44 is provided at the upper end of the gasification chamber 1, and a coolant input pipe 43 and a dust-suppressing liquid input pipe 32 are provided at the connection between the gasification chamber 1 and the waste boiler chamber 2. The coolant input pipe 43 is connected to the coolant outlet tank (not shown in the figure), and the coolant output pipe 44 is connected to the coolant collection tank (not shown in the figure). During the synthesis gas cooling process, the coolant outlet tank delivers coolant to the first water-cooling pipe 41 and the second water-cooling pipe 42 through the coolant output pipe 44. After the coolant completes the circulation, the first water-cooling pipe 41 and the second water-cooling pipe 42 converge at the coolant output pipe 44. The coolant output pipe 44 delivers the heat-absorbing coolant to the coolant collection tank. In addition, the spray tank (not shown in the figure) delivers dust-suppressing liquid to the liquid distribution ring through the dust-suppressing liquid input pipe 32.

[0031] Please refer to the instruction manual appendix. Figure 5Each water spray pipe 31 has a plurality of water spray holes 33 evenly distributed on its sidewall. Preferably, the length of the section of the water spray pipe 31 with the water spray holes 33 is 0.7 to 0.9 times the length of the waste heat boiler connecting pipe 3, and the diameter of each water spray hole 33 is 2 to 10 mm. The diameter and length of the waste heat boiler connecting pipe 3 are 0.25 to 1 mm. Furthermore, each water spray hole 33 extends into the inner cavity and outer periphery of the waste heat boiler connecting pipe 3, so that the water spray pipe 31 can also spray dust-suppressing liquid onto the outer periphery of the waste heat boiler connecting pipe 3. After the syngas is transported into the waste heat boiler chamber 2, Syngas forms an airflow in the waste boiler chamber 2. Since the upper end of the waste boiler pipe 3 connected to the waste boiler chamber 2 is tapered, that is, the distance between the waste boiler chamber 2 and the waste boiler pipe 3 gradually approaches the gasification chamber 1, the airflow formed by syngas flows faster through this gap area. Compared with other areas of the waste boiler chamber 2, more syngas flows through this area. The ash residue in the syngas that has not been dusted will accumulate in the gap. Therefore, the water spray pipe 31 is set to spray dust-suppressing liquid to the outer periphery of the waste boiler pipe 3 to further improve the dust suppression effect of this application.

[0032] Please continue to refer to the instruction manual appendix. Figure 1 An inner cavity for housing 5 is provided around the outer periphery of the gasification chamber 1 and the waste boiler chamber 2, and is spaced apart from the gasification chamber 1 and the waste boiler chamber 2. A pressure valve is provided on the side wall of the housing 5. The operator delivers high-pressure gas to the inner cavity of the housing 5 through the pressure valve. The high-pressure gas fills the gap between the housing 5 and the gasification chamber 1 and the waste boiler chamber 2. High-pressure steam is used to balance the pressure difference between the cooling pipe wall and the inside and outside of the waste boiler pipe 3, so as to avoid deformation and damage to the cooling pipe wall and the waste boiler pipe 3 due to excessive pressure difference.

[0033] In addition, an exhaust pipe 21 extends from the end of the waste heat boiler chamber 2 away from the gasification chamber 1, and a discharge port 51 is provided at the end of the housing 5 away from the gasification chamber 1. A water bath 6 is provided above the discharge port 51, and the water bath 6 is filled with dust-suppressing liquid. The exhaust pipe 21 passes through the top plate of the water bath 6 and extends its port to a position close to the bottom plate of the water bath 6. Furthermore, a gas supply pipe 61 is provided on the top plate of the water bath 6, and the gas supply pipe 61 communicates with the inner cavity of the water bath 6. It should be noted that the dust-suppressing liquid does not completely fill the water bath 6, that is, there is a storage cavity above the dust-suppressing liquid. When the syngas enters the water bath 6 through the exhaust pipe 21, the syngas floats up and enters the storage cavity. During the process of the syngas floating up, it passes through the dust-suppressing liquid, and the dust-suppressing liquid removes the ash and slag in the syngas. This application uses water spray pipe 31 for dust suppression and water bath 6 for secondary purification to ensure that the ash and slag contained in the produced syngas are within an acceptable range. The syngas after washing is discharged from the discharge port 51 through the gas supply pipe 61.

[0034] Please refer to the instruction manual appendix. Figure 1 and 4A fixed cover plate 7 is provided on the outer rear of the waste pot pipe 3. The fixed cover plate 7 is circular and coaxially arranged with the waste pot pipe 3. The fixed baffle 71 is used to limit the extension length of the waste pot pipe 3. Furthermore, a baffle 71 is provided vertically on the side edge of the fixed baffle 71 away from the waste pot pipe 3. The extension direction of the baffle 71 is the end close to the discharge port 51. The baffle 71, the fixed cover plate 7 and the side wall of the waste pot pipe 3 form a receiving groove. The receiving groove is filled with refractory fiber 72. The refractory fiber 72 is used to seal the docking gap between the waste pot chamber 2 and the waste pot pipe 3 to prevent the ash and slag airflow from impacting the docking gap.

[0035] Preferably, a burner 8 is provided at the end of the gasification chamber 1 away from the waste boiler inlet pipe 3. The burner 8 is used for the gasification reaction of coal slurry. In addition, a tapering section is provided at the end of the gasification chamber 1 connected to the waste gas chamber and the end of the waste boiler inlet pipe 3 connected to the outlet 51. The tapering direction of the tapering section is away from the burner 8. The tapering section facilitates the accumulation of syngas and accelerates the exhaust rate.

[0036] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0037] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A waste boiler gasification furnace, characterized in that, include: Gasification chamber (1), the gasification chamber (1) is used for water-coal gasification reaction, the lower port of the gasification chamber (1) is extended with waste boiler pipe (3), the waste boiler pipe (3) extends into the waste boiler chamber (2) to connect the gasification chamber (1) and the waste boiler chamber (2), the waste boiler chamber (2) is used to receive the synthesis gas generated by the gasification chamber (1); The cooling pipe wall is located outside the gasification chamber (1). A first water-cooling pipe (41) and a second water-cooling pipe (42) extend inside the cooling pipe wall. The second water-cooling pipe (42) extends into the waste boiler connector (3). The first water-cooling pipe (41) and the second water-cooling pipe (42) are used to cool the synthesis gas. A water spray pipe (31) is provided inside the waste boiler connector (3). The water spray pipe (31) sprays water mist onto the waste boiler connector (3) to reduce dust in the synthesis gas.

2. The waste boiler gasification furnace according to claim 1, characterized in that, The first water-cooled pipe (41), the second water-cooled pipe (42), and the spray pipe (31) are all parallel to the axis of the gasification chamber (1). Adjacent first water-cooled pipes (41) and second water-cooled pipes (42) are connected by U-shaped elbows. A liquid distribution ring is provided above the waste pot pipe (3), and the liquid distribution ring is connected to each of the spray pipes (31).

3. The waste boiler gasification furnace according to claim 2, characterized in that, The gasification chamber (1) is connected to the waste boiler pipe (3) with a water spray tank and a coolant outlet tank. The water spray tank is connected to each of the water spray pipes (31) to supply dust-suppressing liquid to the water spray pipes (31). The coolant outlet tank is connected to the first water cooling pipe (41) and the second water cooling pipe (42) to supply coolant to the first water cooling pipe (41) and the second water cooling pipe (42). The gasification chamber (1) is provided with a coolant collection tank at the end away from the waste boiler pipe (3). The coolant collection tank is used to collect the coolant after heat absorption.

4. The waste boiler gasification furnace according to claim 2, characterized in that, The gasification chamber (1) and the waste pot chamber (2) are both located in the inner cavity of the container shell (5). The container shell (5) has a discharge port (51) at one end away from the gasification chamber (1). The discharge port (51) is used to output the synthesis gas generated by the reaction.

5. The waste boiler gasification furnace according to claim 4, characterized in that, The waste boiler chamber (2) has an exhaust pipe (21) extending from the end opposite to the gasification chamber (1). A water bath (6) is provided above the discharge port (51). The water bath (6) stores dust-suppressing liquid. The exhaust pipe (21) extends into the water bath (6). The top of the water bath (6) is connected to a gas supply pipe (61), which extends into the discharge port (51).

6. The waste boiler gasification furnace according to claim 1, characterized in that, The outer periphery of the waste pot connector (3) is provided with a fixed cover plate (7), which abuts against the port of the waste pot chamber (2). The fixed cover plate (7) is used to limit the depth of the waste pot connector (3) extending into the waste pot chamber (2).

7. The waste boiler gasification furnace according to claim 6, characterized in that, The fixed cover plate (7) has a baffle (71) vertically arranged on the edge away from the waste pot pipe (3). The baffle (71), the fixed cover plate (7), and the side wall of the waste pot pipe (3) form a receiving groove. The receiving groove is filled with refractory fiber (72). The refractory fiber (72) is used to seal the gap between the waste pot pipe (3) and the port of the waste pot chamber (2).

8. The waste boiler gasification furnace according to claim 2, characterized in that, The sidewall of the water spray pipe (31) is evenly provided with a number of water spray holes (33). The length of the section of the water spray pipe (31) with the water spray holes (33) is 0.7 to 0.9 times the length of the waste pot connector (3). The diameter of the water spray holes (33) is 2 to 10 mm.

9. The waste boiler gasification furnace according to claim 4, characterized in that, The outer wall of the housing (5) is provided with a pressure valve, which fills the inner cavity of the housing (5) with high-pressure gas. The high-pressure gas is used to balance the pressure difference between the cooling pipe wall and the inside and outside of the waste pot pipe (3).

10. The waste boiler gasification furnace according to claim 5, characterized in that, The upper end of the gasification chamber (1) is provided with a burner (8), which is used to carry out coal slurry gasification reaction. The gasification chamber (1) and the waste boiler pipe (3) and the waste boiler chamber (2) and the exhaust pipe (21) are both provided with a tapering section. The tapering direction of the tapering section is away from the burner (8). The diameter to length ratio of the waste boiler pipe (3) is in the range of 0.25 to 1.

Images