A quenching device for a gasifier

Abstract

An embodiment of the present invention provides a quenching device for a gasifier, which includes a shell, a quenching ring, a downpipe and a liquid inlet pipe connected to the quenching ring, wherein the quenching ring and the liquid inlet pipe form a quenching liquid channel. The quenching ring and the liquid inlet pipe also include a flushing device, a monitoring device, and a control device. The flushing device includes a flushing pipe and a control valve provided on the flushing pipe, wherein the flushing pipe is connected to the quenching ring or the liquid inlet pipe; the monitoring device is provided on the liquid inlet pipe, and the monitoring device is used to monitor the blockage degree of the quenching liquid channel and obtain corresponding monitoring values; the control device is electrically connected to the control valve and the monitoring device, and the control device receives the monitoring value and sends an opening signal to the control valve of the flushing device when the monitoring value exceeds a preset threshold value, so that the flushing device can automatically and promptly clean the quenching liquid channel when the quenching liquid channel is blocked, effectively improving the blockage of the quenching liquid channel, extending the service life of the quenching ring, reducing maintenance and overhaul costs, and ensuring the long-term safe and stable operation of the device.

Description

Technical Field

[0001] The present invention relates to a quenching device, in particular to a quenching device for a gasifier. Background Art

[0002] During the coal gasification process, high-temperature crude syngas (approximately 1500°C) and molten slag are generated in the gasifier and then flow into the quench chamber for cooling and gas-slag separation. The quench ring is a key component of the quench chamber, rapidly cooling the high-temperature crude syngas and slag and protecting the downcomer from erosion and corrosion.

[0003] Due to factors such as water quality, the quenching liquid channels within the quenching ring are prone to scaling and clogging. Failure to clean these channels promptly reduces quenching liquid flow, deteriorating heat exchange, and ultimately damaging the quenching ring, impacting normal operation. Conventional quenching devices can only inspect and clean impurities within the quenching liquid channels after the gasifier has stopped operating. This can lead to serious blockage and even damage to the quenching device if left unchecked. Summary of the Invention

[0004] In response to the above-mentioned technical problems existing in the prior art, the present invention provides a quenching device for a gasifier, which monitors the degree of blockage in the quenching liquid channel in real time through a monitoring device, and when the blockage is serious, it can promptly send an opening signal to the control valve of the flushing device through a control device to achieve timely cleaning of the blocked quenching liquid channel.

[0005] An embodiment of the present invention provides a quenching device for a gasifier, comprising a housing, a quenching ring disposed within the housing, and a downcomer and a liquid inlet pipe connected to the quenching ring, wherein the quenching ring and the liquid inlet pipe form a quenching liquid channel. The quenching device further comprises:

[0006] a flushing device comprising a flushing pipe and a control valve provided on the flushing pipe, wherein the flushing pipe is connected to the quenching ring or the liquid inlet pipe;

[0007] a monitoring device, which is provided on the liquid inlet pipe, and is used to monitor the blockage degree of the quenching liquid channel and obtain corresponding monitoring values;

[0008] A control device is electrically connected to the control valve and the monitoring device. The control device receives the monitoring value and sends an opening signal to the control valve of the flushing device when the monitoring value exceeds a preset threshold value, so that the flushing medium in the flushing pipe flushes the quenching liquid channel.

[0009] In some embodiments, the monitoring value includes any one or more of a pressure value, a temperature value, and a flow value of the quenching liquid channel.

[0010] In some embodiments, a check valve is provided on the liquid inlet pipe, and the flushing pipe is connected to the liquid inlet pipe and is located downstream of the check valve.

[0011] In some embodiments, the quenching device also includes a check valve provided on the liquid inlet pipe, and the monitoring device includes a temperature sensor provided on the liquid inlet pipe. The temperature sensor is located outside the shell and is provided downstream of the check valve. The temperature sensor is electrically connected to the control device so that when the temperature sensor detects that the temperature of the quenching liquid channel located outside the shell is reduced to less than a first preset threshold value, the temperature sensor sends a temperature signal to the control device, and the control device sends the opening signal to the control valve.

[0012] In some embodiments, the quenching device also includes a check valve provided on the liquid inlet pipe, and the monitoring device includes a pressure sensor provided on the liquid inlet pipe. The pressure sensor is located outside the shell and is provided downstream of the check valve. The pressure sensor is electrically connected to the control device so that when the pressure sensor detects that the pressure in the quenching liquid channel rises to greater than a second preset threshold value, the pressure sensor sends a pressure signal to the control device, and the control device sends the opening signal to the control valve.

[0013] In some embodiments, the quenching device also includes a check valve provided on the liquid inlet pipe, and the monitoring device includes a flow sensor provided on the liquid inlet pipe. The flow sensor is located outside the shell and is provided downstream of the check valve. The flow sensor is electrically connected to the control device so that when the flow sensor detects that the flow in the quenching liquid channel is reduced to less than a third preset threshold value, the flow sensor sends a flow signal to the control device, and the control device sends the opening signal to the control valve.

[0014] In some embodiments, the axis of the liquid inlet pipe is tangent to the circle formed by the quenching ring, and the circle has a symmetry axis perpendicular to the axis of the liquid inlet pipe. The flushing pipe is connected to the quenching ring, and the obtuse angle formed by the intersection of the axis of the flushing pipe and the symmetry axis ranges from 90 degrees to 150 degrees to form a vortex.

[0015] In some embodiments, the quench ring is a circular ring, the flushing pipe is connected to the quench ring, and the connection point between the flushing pipe and the quench ring is a first connection point. The obtuse angle formed by the intersection of the axis of the flushing pipe and the symmetry axis of the quench ring passing through the first connection point is in a range of 90 degrees to 150 degrees.

[0016] The connection point between the liquid inlet pipe and the quenching ring is the second connection point, and the flushing pipe includes a first pipe section and a second pipe section connected to the quenching ring, wherein the obtuse angle formed by the intersection of the axis of the second pipe section and the symmetry axis of the quenching ring passing through the second connection point is in the range of 90 degrees to 150 degrees.

[0017] In some embodiments, the flushing medium comprises a gaseous medium;

[0018] The gas medium is steam, nitrogen or carbon dioxide, and the pressure formed by the gas medium is higher than the pressure in the quenching liquid channel; the higher pressure range is 0 to 2 MPa.

[0019] In some embodiments, the flushing medium comprises a liquid medium, and the liquid medium is an acidic or alkaline liquid.

[0020] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows: the embodiments of the present invention utilize a monitoring device provided on the liquid inlet pipe and a flushing device capable of flushing the quenching liquid channel, and utilize the above-mentioned monitoring device to monitor the blockage degree of the quenching liquid channel and obtain corresponding detection values. When the monitoring value received by the control device exceeds the preset threshold value, the control device can send an opening signal to the control valve so that the flushing device can automatically and promptly clean the quenching liquid channel when the quenching liquid channel is blocked, effectively improving the blockage of the quenching liquid channel, extending the service life of the quenching ring, reducing maintenance and repair costs, and ensuring the long-term safe and stable operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the description and claims, serve to illustrate the disclosed embodiments. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive of the embodiments of the present apparatus or method.

[0022] Figure 1 Schematic diagram of the structure of the quenching device of the gasifier according to an embodiment of the present invention;

[0023] Figure 2 A top view of an embodiment of a quenching device for a gasifier according to an embodiment of the present invention;

[0024] Figure 3 This is a top view of another embodiment of the quenching device of the gasifier according to an embodiment of the present invention.

[0025] The components indicated by the reference numerals in the figures are:

[0026] 1-quenching ring; 2-down pipe; 3-shell; 4-liquid inlet pipe; 5-monitoring device; 6-check valve; 7-flushing pipe; 8-control valve. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments, but are not intended to limit the present invention.

[0028] The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are simply used to distinguish different parts. Terms such as "include" or "comprising" mean that the elements preceding the term include the elements listed after the term, and do not exclude the possibility of also including other elements. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0029] In the present invention, when a specific device is described as being located between a first device and a second device, an intervening device may or may not be present between the specific device and the first device or the second device. When a specific device is described as being connected to another device, the specific device may be directly connected to the other device without an intervening device, or may be directly connected to the other device but with an intervening device.

[0030] All terms (including technical or scientific terms) used in the present invention have the same meaning as those understood by ordinary technicians in the field to which the present invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0032] The embodiment of the present invention provides a quenching device for a gasifier, the quenching device comprising a shell 3, a quenching ring 1 disposed in the shell 3, and a downcomer 2 and a liquid inlet pipe 4 (such as Figure 1As shown in FIG. 1 , the quenching ring 1 and the liquid inlet pipe 4 form a quenching liquid channel, through which the quenching liquid is discharged into the cavity formed by the downcomer. It is understood that the quenching liquid enters the quenching ring 1 through the liquid inlet pipe 4 to cool the downcomer 2. The quenching device also includes a flushing device and a monitoring device 5. The flushing device includes a flushing pipe 7 and a control valve 8 provided on the flushing pipe 7. The control valve 8 is used to control whether the flushing pipe 7 supplies flushing liquid into the flushing pipe 7. That is, when the control valve 8 is open, the flushing liquid in the flushing pipe 7 can flow into the quenching liquid channel. When the control valve 8 is closed, the flushing liquid in the flushing pipe 7 stops supplying flushing liquid to the quenching liquid channel. The flushing pipe 7 is connected to the quenching ring 1 or the liquid inlet pipe 4. The above-mentioned monitoring device 5 is arranged on the liquid inlet pipe 4. The monitoring device 5 is used to monitor the blockage degree of the quenching liquid channel and obtain corresponding monitoring values. It can be understood that the above-mentioned monitoring device 5 can, for example, monitor one or more of the pressure value, temperature value and flow value in the quenching liquid channel, that is, as long as it can be used to monitor the blockage degree of the quenching liquid channel.

[0033] Furthermore, the quenching device also includes a control device, which is electrically connected to the control valve 8 and the monitoring device 5. That is, the control device can not only receive the monitoring value of the monitoring device 5, but also control the flow direction of the quenching liquid by controlling the opening and closing of the control valve 8. The above-mentioned control device receives the monitoring value obtained by the monitoring device 5, and when the monitoring value exceeds a preset threshold, it sends an opening signal to the control valve 8 of the flushing device, that is, controls the flushing liquid in the flushing pipe 7 to flow to the quenching liquid channel, so that the flushing medium in the flushing pipe 7 flushes the quenching liquid channel. The above-mentioned preset threshold can be summarized by the operator based on experience or experimental data, and this application does not make any specific restrictions on this.

[0034] It should be noted that the control device is electrically connected to the control valve 8 and the monitoring device 5 to control the control valve 8 and the monitoring device 5. The user can select the required model and specifications of the control device according to actual needs. In addition, the control device can be installed in the central control room.

[0035] The embodiment of the present invention is capable of obtaining corresponding detection values by providing a monitoring device 5 on the liquid inlet pipe 4 and a flushing device capable of flushing the quenching liquid channel, and utilizing the above-mentioned monitoring device 5 to monitor the blockage degree of the quenching liquid channel. When the monitoring value received by the control device exceeds the preset threshold value, the control device can send an opening signal to the control valve 8 so that the flushing device can automatically and promptly clean the quenching liquid channel when the quenching liquid channel is blocked, thereby effectively improving the blockage condition of the quenching liquid channel, extending the service life of the quenching ring 1, reducing maintenance and overhaul costs, and ensuring the long-term safe and stable operation of the device.

[0036] In some embodiments, the monitoring value may include any one or more of the pressure value, temperature value and flow value of the cooling liquid channel. It can be understood that when the cooling liquid channel is blocked, the pressure value therein will increase to a certain extent, or the flow value of the cooling liquid channel will decrease due to the blockage, or the cooling liquid in the cooling liquid channel outside the shell 3 will stay outside the shell 3 for a period of time due to blockage, and the temperature value of the cooling liquid there will gradually decrease from high temperature to close to the outdoor temperature, that is, the temperature value of the cooling liquid channel outside the shell 3 will gradually decrease, that is, the above-mentioned pressure value, temperature value and flow value will change due to the degree of blockage of the cooling liquid channel. By monitoring any combination of the above three or individually, the degree of blockage of the cooling liquid channel can be monitored, so that the cooling liquid channel can be automatically flushed in time after it is blocked.

[0037] In some embodiments, the quenching device further includes a check valve 6 provided on the liquid inlet pipe 4, and the monitoring device 5 includes a temperature sensor provided on the liquid inlet pipe 4. The temperature sensor is located outside the shell 3 and is located downstream of the check valve 6. That is, the temperature sensor is used to monitor the temperature of the quenching liquid channel outside the shell 3. The temperature sensor is electrically connected to the control device, and the control device is capable of receiving the temperature value sent by the temperature sensor. When the temperature sensor detects that the temperature of the quenching liquid channel outside the shell 3 drops to less than a first preset threshold, the temperature sensor sends a temperature signal to the control device, and the control device sends an opening signal to the control valve 8. It can be understood that the quenching The temperature of the chilled liquid in the liquid channel is higher than the outdoor temperature. When the chilled liquid channel is blocked, the chilled liquid in the chilled liquid channel outside the shell 3 is retained outside the shell 3, resulting in poor fluidity of the chilled liquid. Due to natural convection heat transfer, the temperature of the chilled liquid therein will gradually decrease to approach the outdoor temperature. The above-mentioned temperature sensor can timely monitor the temperature drop of the chilled liquid in the chilled liquid channel outside the shell 3, and when the temperature drops to less than the first preset threshold, the temperature sensor sends a temperature signal to the above-mentioned control device, so that the control device can timely control the control valve 8 to open, thereby timely flushing the chilled liquid channel to clear the blockage of the chilled liquid channel.

[0038] In some embodiments, the quenching device also includes a check valve 6 provided on the liquid inlet pipe 4, and the monitoring device 5 includes a pressure sensor provided on the liquid inlet pipe 4. The pressure sensor is located outside the shell 3 and is provided downstream of the check valve 6. That is, the above-mentioned pressure sensor is used to monitor the pressure difference between the cavity formed by the quenching liquid channel and the downcomer. The pressure sensor is electrically connected to the control device, and the control device can receive the pressure value sent by the above-mentioned pressure sensor. When the pressure sensor detects that the pressure in the quenching liquid channel rises to greater than the second preset threshold, the pressure sensor sends a pressure signal to the control device, and the control device sends an opening signal to the control valve 8. It can be understood that when the quenching liquid channel is blocked, the pressure in the quenching liquid channel will gradually increase. The pressure value in the quenching liquid channel can be monitored in time by the above-mentioned pressure sensor, and when the pressure rises to greater than the second preset threshold, the pressure sensor sends a pressure signal to the above-mentioned control device, so that the control device can timely control the control valve 8 to open, thereby timely cleaning the quenching liquid channel.

[0039] In some embodiments, the quenching device also includes a check valve 6 provided on the liquid inlet pipe 4, and the monitoring device 5 includes a flow sensor provided on the liquid inlet pipe 4. The flow sensor is located outside the shell 3 and is located downstream of the check valve 6. That is, the above-mentioned flow sensor is used to monitor the flow of the quenching liquid channel located outside the shell 3. The flow sensor is electrically connected to the control device. The control device can receive the flow value sent by the above-mentioned flow sensor. When the flow sensor detects that the flow in the quenching liquid channel is reduced to less than the third preset threshold, the flow sensor sends a flow signal to the control device, and the control device sends an opening signal to the control valve 8. It can be understood that when the quenching liquid channel is blocked, the fluidity of the quenching liquid in the quenching liquid channel deteriorates, causing its flow to gradually decrease. The flow value in the quenching liquid channel can be monitored in time by the above-mentioned flow sensor, and when the flow value is reduced to less than the third preset threshold, the flow sensor sends a flow signal to the above-mentioned control device, so that the control device can timely control the control valve 8 to open, thereby timely cleaning the quenching liquid channel.

[0040] In some embodiments, as Figure 2 As shown, the flushing pipe 7 is connected to the liquid inlet pipe 4, the axis of the liquid inlet pipe 4 is tangent to the circle formed by the quenching ring 1, and the connection between the flushing pipe 7 and the liquid inlet pipe 4 is located downstream of the check valve 6. The above-mentioned check valve 6 is used to prevent the flushing medium from flowing back into the upstream of the quenching device.

[0041] In some embodiments, the axis of the liquid inlet pipe 4 is tangent to the circle formed by the quenching ring 1, such as Figure 3As shown, the circle has an axis of symmetry perpendicular to the axis of the liquid inlet pipe 4. A flushing pipe 7 is connected to the chilling ring 1, and the obtuse angle formed by the intersection of the flushing pipe 7's axis and the axis of symmetry ranges from 90 to 150 degrees, thereby creating a swirling flow. This angled connection of the flushing pipe 7 to the chilling ring 1 allows the chilling liquid to swirl within the chilling ring 1 during operation or cleaning, quickly changing the properties of the local medium and rapidly eliminating blockages in the chilling liquid channel.

[0042] In some embodiments, as Figure 3 As shown, the quench ring 1 is a circular ring. The flushing pipe 7 is connected to the quench ring 1. The connection point between the flushing pipe 7 and the symmetry axis of the quench ring 1 passing through the first connection point forms an obtuse angle ranging from 90 degrees to 150 degrees. The connection point between the liquid inlet pipe 4 and the quench ring 1 is a second connection point. The flushing pipe 7 includes a first pipe section and a second pipe section. The second pipe section is connected to the quench ring 1. The first pipe section is the upstream pipe section of the second pipe section. Preferably, the first pipe section is parallel to the liquid inlet pipe 4. The obtuse angle formed by the axis of the second pipe section and the symmetry axis of the quench ring 1 passing through the second connection point forms an obtuse angle ranging from 90 degrees to 150 degrees. By connecting the flushing pipe 7 and the liquid inlet pipe 4 to the quench ring 1 at certain and different angles, the quenching liquid and the flushing medium can swirl within the quench ring 1 during operation or cleaning, quickly changing the properties of the local medium and quickly eliminating blockage in the quenching liquid channel.

[0043] In some embodiments, the flushing medium includes a gas medium; the gas medium is steam, nitrogen or carbon dioxide, so as to change the properties of the local medium in the quenching liquid channel in a short time, and the pressure formed by the gas medium is higher than the pressure in the quenching liquid channel. The above-mentioned higher pressure range is preferably 0 to 2 MPa, so as to use the flushing medium with higher pressure to effectively clear the blocked quenching liquid channel.

[0044] In some embodiments, the flushing medium includes a liquid medium, which is an acidic or alkaline liquid, so as to change the properties of the local medium in the quenching liquid channel in a short time.

[0045] Furthermore, although exemplary embodiments have been described herein, the scope includes any and all embodiments based on the present invention having equivalent elements, modifications, omissions, combinations (e.g., schemes where various embodiments intersect), adaptations, or changes. The elements in the claims are to be interpreted broadly based on the language employed in the claims and are not limited to the examples described in this specification or during the prosecution of this application, which examples are to be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, with the true scope and spirit being indicated by the following claims and the full scope of their equivalents.

[0046] The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more of their solutions) can be used in combination with each other. For example, a person of ordinary skill in the art may use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the present invention. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the present invention may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the present invention should be determined with reference to the appended claims and the full scope of equivalents to which these claims are entitled.

[0047] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present invention.

Claims

1. A quenching device for a gasifier, comprising a housing, a quenching ring disposed within the housing, and a downcomer and a liquid inlet pipe connected to the quenching ring, wherein the quenching ring and the liquid inlet pipe form a quenching liquid channel, characterized in that: The quenching device also includes: A flushing device, comprising a flushing pipe and a control valve provided on the flushing pipe, wherein the flushing pipe is connected to the quenching ring or the liquid inlet pipe to clear the blockage of the quenching liquid channel in real time during operation; a monitoring device, which is provided on the liquid inlet pipe, and is used to monitor the blockage degree of the quenching liquid channel and obtain corresponding monitoring values; a control device electrically connected to the control valve and the monitoring device, the control device receiving the monitoring value and sending an opening signal to the control valve of the flushing device when the monitoring value exceeds a preset threshold value, so that the flushing medium in the flushing pipe flushes the quenching liquid channel, thereby changing the properties of the local medium in the quenching liquid channel in a short period of time; The monitoring values include at least the pressure value, temperature value and flow value of the quenching liquid channel.

2. The quenching device for a gasifier according to claim 1, characterized in that: A check valve is provided on the liquid inlet pipe, and the flushing pipe is connected to the liquid inlet pipe and is located downstream of the check valve.

3. The quenching device for a gasifier according to claim 1, characterized in that: The quenching device also includes a check valve provided on the liquid inlet pipe, and the monitoring device includes a temperature sensor provided on the liquid inlet pipe. The temperature sensor is located outside the shell and is located downstream of the check valve. The temperature sensor is electrically connected to the control device so that when the temperature sensor detects that the temperature of the quenching liquid channel located outside the shell drops to less than a first preset threshold, the temperature sensor sends a temperature signal to the control device, and the control device sends the opening signal to the control valve.

4. The quenching device for a gasifier according to claim 1, characterized in that: The quenching device also includes a check valve provided on the liquid inlet pipe, and the monitoring device includes a pressure sensor provided on the liquid inlet pipe. The pressure sensor is located outside the shell and is provided downstream of the check valve. The pressure sensor is electrically connected to the control device so that when the pressure sensor detects that the pressure in the quenching liquid channel rises to greater than a second preset threshold, the pressure sensor sends a pressure signal to the control device, and the control device sends the opening signal to the control valve.

5. The quenching device for a gasifier according to claim 1, characterized in that: The quenching device also includes a check valve provided on the liquid inlet pipe, and the monitoring device includes a flow sensor provided on the liquid inlet pipe. The flow sensor is located outside the shell and is provided downstream of the check valve. The flow sensor is electrically connected to the control device so that when the flow sensor detects that the flow in the quenching liquid channel is reduced to less than a third preset threshold value, the flow sensor sends a flow signal to the control device, and the control device sends the opening signal to the control valve.

6. The quenching device for a gasifier according to claim 1, characterized in that: The axis of the liquid inlet pipe is tangent to the circle formed by the quenching ring, and the circle has a symmetry axis perpendicular to the axis of the liquid inlet pipe. The flushing pipe is connected to the quenching ring, and the obtuse angle formed by the intersection of the axis of the flushing pipe and the symmetry axis ranges from 90 degrees to 150 degrees to form a vortex.

7. The quenching device for a gasifier according to claim 1, characterized in that: The quench ring is a circular ring, the flushing pipe is connected to the quench ring, and the connection point between the flushing pipe and the quench ring is a first connection point. The obtuse angle formed by the intersection of the axis of the flushing pipe and the symmetry axis of the quench ring passing through the first connection point is in a range of 90 degrees to 150 degrees. The connection point between the liquid inlet pipe and the quenching ring is the second connection point, and the flushing pipe includes a first pipe section and a second pipe section connected to the quenching ring, wherein the obtuse angle formed by the intersection of the axis of the second pipe section and the symmetry axis of the quenching ring passing through the second connection point is in the range of 90 degrees to 150 degrees.

8. The quenching device for a gasifier according to claim 1, characterized in that: The flushing medium includes a gaseous medium; The gas medium is steam, nitrogen or carbon dioxide, and the pressure formed by the gas medium is higher than the pressure in the quenching liquid channel; the higher pressure range is 0 to 2 MPa.

9. The quenching device for a gasifier according to claim 1, characterized in that: The flushing medium includes a liquid medium, and the liquid medium is an acidic or alkaline liquid.

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