Water quenching device for gasification furnace

Abstract

The utility model discloses a gasification furnace water quenching cooling device relates to gasification furnace related technical field, the utility model discloses a quenching tank, the upper end surface bolt of quenching tank is provided with the apron, the lower end fixed with the downcomer and the riser of the lower end in the quenching tank inside of apron upper end surface, the just below of being located the outside of quenching tank is provided with the tilt tank, the inside rotation of tilt tank is provided with spiral rod, the lower end surface bolt of riser is provided with the mounting ring plate, the upper end surface fixed with the vertical frame of inserting in the inside of riser of mounting ring plate, the inside fixed sawtooth frame of vertical frame. The utility model discloses through the use of sawtooth frame, prevent bubble aggregation, promote the stability and heat exchange efficiency of gas flow, the use of spiral rod simultaneously, realize mechanical solid -liquid separation's function.

Description

Technical Field

[0001] This utility model belongs to the technical field of gasifiers, and in particular relates to a water quenching and cooling device for gasifiers. Background Technology

[0002] As a core piece of equipment for the clean and efficient utilization of coal, gasifiers are widely used in chemical, power and metallurgical fields. During the gasification process, the high-temperature syngas generated from the reaction chamber can reach thousands of degrees Celsius and carries a large amount of molten ash. In order to meet the process requirements of subsequent stages and recover sensible heat, this high-temperature gas must be rapidly cooled and initially purified. Water quenching technology has become one of the most widely used quenching methods due to its advantages such as rapid cooling, relatively simple structure and low cost. This technology achieves rapid heat transfer by bringing the high-temperature gas into direct contact with cooling water. At the same time, the molten slag in the gas is quenched and solidified by water, and some impurities are dissolved in the water, thereby achieving the dual purpose of cooling and purification. However, existing water quenching devices break up bubbles by installing simple grid plates inside the riser pipe. While this approach improves the bubble aggregation problem to some extent, the bubble-breaking effect is limited. Gases still easily coalesce into large bubbles during the ascent, leading to instability in the gas-liquid two-phase flow and affecting heat exchange efficiency. Furthermore, the treatment of slag-containing wastewater generated during the quenching process typically involves simple sedimentation followed by discharge or reliance on an external sedimentation system. This not only wastes water resources but also increases the frequency of system maintenance and operating costs due to the accumulation of solid particles that can clog the bottom of the quench chamber and pipes. Therefore, we provide a water quenching cooling device for gasifiers to address the aforementioned problems. Utility Model Content

[0003] The purpose of this invention is to provide a water-cooled gasifier cooling device. By using a serrated frame, it prevents bubble accumulation, improves the stability of gas flow and heat exchange efficiency, and at the same time, the use of a spiral rod realizes the function of mechanical solid-liquid separation.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a water quenching and cooling device for a gasifier, including a quenching box; a cover plate is bolted to the upper end face of the quenching box, and a downcomer pipe and an upcomer pipe with their lower ends inside the quenching box are fixed to the upper end face of the cover plate; an inclined box is set directly below the outside of the quenching box, and a spiral rod is rotatably installed inside the inclined box; a mounting ring plate is bolted to the lower end face of the upcomer pipe, and a vertical frame inserted into the upcomer pipe is fixed to the upper end face of the mounting ring plate; a toothed frame is fixed inside the vertical frame.

[0005] The present invention is further configured such that the interior of the quench chamber is provided with multiple sets of nozzles evenly distributed along the periphery of the downcomer.

[0006] The present invention is further configured such that a liquid level probe for monitoring the liquid level is fixed on the surface wall of the quench chamber, and the lower end of the downcomer is lower than the lower end of the riser.

[0007] The present invention is further configured such that the lower part of the quench chamber is a conical cavity, and a linkage valve is provided between the quench chamber and the tilting chamber, the linkage valve being connected to the port on the surface wall of the quench chamber and the lower port of the conical cavity.

[0008] The present invention is further configured such that a motor connected to the screw drive is installed on the lower end face of the outside of the tilting box, a drainage pipe connected to the inside of the tilting box is fixed on the lower part of the tilting box surface wall, and a slag discharge pipe connected to the inside of the tilting box is fixed on the upper part of the tilting box surface wall.

[0009] The present invention is further configured such that a base frame is provided directly below the quench chamber, and the rods on the base frame are fixedly connected to the lower end face of the quench chamber and the surface wall of the inclined chamber, respectively.

[0010] The present invention is further configured such that there are multiple sets of saw teeth inside the upright frame, which are evenly distributed vertically, and the saw teeth on the adjacent sets of saw teeth are staggered.

[0011] This utility model has the following beneficial effects: This invention features a bubble-breaking assembly consisting of a vertical frame and a serrated frame inside the riser pipe. This assembly effectively cuts and breaks large bubbles, prevents bubble aggregation, and improves the stability of gas flow and heat exchange efficiency. The serrated frame is arranged in an alternating pattern to enhance the bubble-breaking effect and make the gas-liquid mixture more uniform.

[0012] This invention controls the discharge of slag-containing wastewater into an inclined box via a linkage valve, and uses a screw rod to achieve mechanical solid-liquid separation. The solid slag is discharged through a slag discharge pipe, and the clarified water is discharged through a drainage pipe and can be recycled, thus saving water resources. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0016] Figure 3This is a structural diagram of the riser pipe and the bubble breaking component in this utility model.

[0017] Figure 4 This is a structural diagram of the bubble-breaking component in this utility model.

[0018] 1-Quick cooling box, 101-Downcomer, 102-Rising pipe, 103-Nozzle, 104-Conical cavity, 105-Level probe, 106-Cover plate, 2-Tilting box, 201-Screw rod, 202-Motor, 203-Drainage pipe, 204-Slag discharge pipe, 205-Interlocking valve, 3-Base frame, 4-Mounting ring plate, 401-Upright frame, 402-Sawtooth frame. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1 to 4 This utility model relates to a water quenching and cooling device for a gasifier, comprising a quenching chamber 1. The quenching chamber 1 is a cooling container containing cooling water for quenching and cooling high-temperature gas. A cover plate 106 is bolted to the upper end of the quenching chamber 1. The cover plate 106 seals the upper part of the quenching chamber 1 and facilitates the installation and maintenance of internal components such as the downcomer 101 and the riser 102. The downcomer 101 and the riser 102, whose lower ends are inside the quenching chamber 1, are fixed to the upper end of the cover plate 106. The downcomer 101 guides the high-temperature gas into the quenching chamber 1 to a position below the liquid level, achieving direct contact heat exchange between the gas and the cooling water. Simultaneously, the riser 102 guides the cooled gas... The gas rises from the liquid surface to the outlet, completing the gas output. An inclined box 2 is located directly below the outside of the quench box 1. The inclined box 2 is used to receive the slag-containing wastewater discharged from the quench box 1 and perform slag-water separation. A spiral rod 201 is rotated inside the inclined box 2. The spiral rod 201 rotates inside the inclined box 2 and pushes the solid slag upward to achieve solid-liquid separation. A mounting ring plate 4 is bolted to the lower end face of the riser pipe 102. A vertical frame 401 is fixed to the upper end face of the mounting ring plate 4 and inserted into the riser pipe 102. A sawtooth frame 402 is fixed inside the vertical frame 401. The sawtooth frame 402 is used to break the air bubbles formed during the ascent to prevent the air bubbles from accumulating and affecting the gas flow and heat exchange efficiency.

[0021] The quench chamber 1 is equipped with multiple sets of nozzles 103 evenly distributed around the downcomer 101. The nozzles 103 spray the downcomer 101 evenly, forming a water curtain on the lower end face of the downcomer 101, increasing the contact area between the gas and water, and improving the cooling efficiency. A liquid level probe 105 for monitoring the liquid level is fixed on the surface wall of the quench chamber 1. The lower end of the downcomer 101 is lower than the lower end of the riser 102. It should be noted that the liquid level probe 105 constantly monitors the water level inside the quench chamber 1. The liquid level probe 105 is used to monitor and control the liquid level inside the quench chamber 1 to ensure that it is always higher than the lower end face of the downcomer 101 and lower than the lower end face of the riser 102, so as to ensure that the high temperature gas can be quenched by water and that the cooled gas can smoothly enter the riser 102.

[0022] Specifically, the lower part of the quench box 1 is set as a conical cavity 104. The use of the conical cavity 104 can prevent the precipitated particles in the quench box 1 from clogging. A linkage valve 205 is set between the quench box 1 and the tilting box 2. The linkage valve 205 is used to regulate the opening and closing process of drainage and slag discharge. The linkage valve 205 is connected to the port of the surface wall of the quench box 1 and the lower port of the conical cavity 104. A motor 202 connected to the screw rod 201 is installed on the lower end face of the exterior of the tilting box 2. A drainage pipe 203 connected to the interior of the tilting box 2 is fixed on the lower part of the surface wall of the tilting box 2. A slag discharge pipe 204 connected to the interior of the tilting box 2 is fixed on the upper part of the surface wall of the tilting box 2. The motor 202 drives the screw rod 201 to rotate, realizing mechanical slag discharge. It should be noted that a filter screen is installed inside the drain pipe 203 to prevent residue from entering the drain pipe 203.

[0023] Furthermore, a base frame 3 is provided directly below the quench chamber 1, and the rods on the base frame 3 are fixedly connected to the lower end face of the quench chamber 1 and the surface wall of the inclined box 2 respectively. Furthermore, the frame 401 has multiple sets of sawtooth frames 402 inside, which are evenly distributed vertically, and the sawtooths on the adjacent sets of sawtooth frames 402 are staggered.

[0024] The operation process of this embodiment is as follows: the high-temperature syngas generated from the gasifier reaction chamber first enters the downcomer 101. The end of the downcomer 101 is submerged below the water level of the quench box 1, forcing the high-temperature gas into the cooling water. The gas and the cold water undergo direct contact heat exchange. The sensible heat of the gas is rapidly absorbed by the water, and the temperature drops sharply from thousands of degrees Celsius to close to the saturation temperature of the water. After absorbing some of the heat, the water evaporates and becomes water vapor, which mixes into the syngas, increasing the humidity of the syngas. During this process, most of the molten ash slag carried in the gas is quenched and solidified when it comes into contact with water, and is carried by the water flow to settle to the bottom of the box. At the same time, some soluble impurities will also dissolve in the water, achieving the initial purification of the syngas. After being cooled by quenching, the cooled synthesis gas changes direction in the water and flows upward into the riser 102. At the lower part of the riser 102, a bubble-breaking assembly consisting of a stand 401 and a serrated frame 402 is installed. Therefore, when the gas-liquid mixture carrying a large number of bubbles passes through the staggered serrated frame 402, the serrations will cut and break the larger bubbles, turning them into smaller and more uniform bubbles. Finally, the ash particles solidified during the quenching process settle into the conical cavity 104 at the bottom of the quenching chamber 1. Under the control of the linkage valve 205, the wastewater rich in solid ash is periodically or continuously discharged from the bottom of the conical cavity 104 into the inclined chamber 2 below. The motor 202 starts and drives the screw rod 201 to rotate slowly inside the inclined chamber 2. The rotation of the screw rod 201 pushes the heavier solid slag upward from the water. During the pushing process, the water flows back through the gaps between the slag particles under the action of gravity. The solid slag pushed to the upper end of the inclined chamber 2 by the screw rod 201 is discharged from the system through the slag discharge pipe 204 for centralized treatment. The separated and relatively clear water is discharged from the lower drainage pipe 203. This part of the water can usually be cooled and recycled back to the quenching chamber 1 for use, realizing the recycling of water resources.

[0025] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A water quench cooling device for a gasifier, comprising a quench box (1); characterized in that: The upper end face of the quench chamber (1) is bolted with a cover plate (106). The upper end face of the cover plate (106) is fixed with a downcomer (101) and a riser (102) whose lower ends are inside the quench chamber (1). A tilting box (2) is located directly below the outside of the quench chamber (1). A spiral rod (201) is rotatably installed inside the tilting box (2). The lower end face of the riser (102) is bolted with a mounting ring plate (4). The upper end face of the mounting ring plate (4) is fixed with a stand (401) inserted into the riser (102). A toothed frame (402) is fixed inside the stand (401).

2. The gasifier water quench cooling device according to claim 1, characterized in that, The quench chamber (1) is equipped with multiple sets of nozzles (103) evenly distributed around the periphery of the downcomer (101).

3. The gasifier water quench cooling device according to claim 2, characterized in that, The surface of the quench chamber (1) is fixed with a liquid level probe (105) for monitoring the liquid level, and the lower end of the downcomer (101) is lower than the lower end of the riser (102).

4. The gasifier water quench cooling device according to claim 1, characterized in that, The lower part inside the quench chamber (1) is configured as a conical cavity (104). A linkage valve (205) is provided between the quench chamber (1) and the tilting chamber (2). The linkage valve (205) is connected to the port on the surface of the quench chamber (1) and the lower port of the conical cavity (104).

5. The gasifier water quench cooling device according to claim 1, characterized in that, A motor (202) connected to the screw rod (201) is installed on the lower end face of the outside of the tilting box (2). A drainage pipe (203) connected to the inside of the tilting box (2) is fixed on the lower part of the surface wall of the tilting box (2). A slag discharge pipe (204) connected to the inside of the tilting box (2) is fixed on the upper part of the surface wall of the tilting box (2).

6. The gasifier water quench cooling device according to claim 1, characterized in that, A base frame (3) is provided directly below the quench chamber (1), and the rods on the base frame (3) are fixedly connected to the lower end face of the quench chamber (1) and the surface wall of the inclined box (2).

7. The gasifier water quench cooling device according to claim 1, characterized in that, The stand (401) has multiple sets of sawtooth frames (402) inside, which are evenly distributed vertically, and the saw teeth on the adjacent sawtooth frames (402) of the upper and lower sets are staggered.

Images