CN221759770U - Equipment for heat recovery and purification of ash-containing air flow - Google Patents

Abstract

The present application provides an apparatus for heat recovery and purification of an ash-containing gas stream, comprising: a gasifier, a quench chamber, and a syngas conduit; the chilling chamber is arranged outside the gasification furnace and is connected with the chilling chamber through the synthesis gas pipeline; the gasification furnace is used for carrying out fuel gasification treatment on fuel and obtaining a first ash-containing air flow, and carrying out heat recovery and ash removal treatment on the first ash-containing air flow after the fuel gasification treatment so as to obtain a second ash-containing air flow; the second ash containing gas stream is conveyed through a syngas conduit into the quench chamber such that the quench chamber washes and cools the second ash containing gas stream. Therefore, the chilling chamber is additionally arranged outside the gasification furnace, and the first ash-containing air flow is subjected to cooling treatment and ash removal treatment for a plurality of times based on the cooperation of the gasification furnace and the chilling chamber, so that the ash content in the obtained synthesis gas is as low as possible, and the subsequent complexity and requirements for treating the ash-containing synthesis gas are greatly reduced.

Description

Equipment for heat recovery and purification of ash-containing air flow

Technical Field

The application relates to the technical field of chemical industry, in particular to equipment for heat recovery and purification of ash-containing air flow.

Background

Compared with the chilling process technology, the waste boiler gasification technology has higher energy utilization rate. However, in the waste boiler gasification technology, the temperature of the synthesis gas is approximately between 700 and 800 ℃ after heat exchange, and the synthesis gas still has a large amount of heat energy. In order to efficiently recycle the heat in the synthesis gas, only the heat exchange area of the radiant waste boiler can be increased, so that the height of the gasification furnace can be increased, and finally the height of the civil engineering frame of the device is increased. If the 10 ten thousand gas amount gasifiers are about 35m in height and 20 ten thousand gas amount gasifiers are about 50m in height, the occupied space of the gasification frame is greatly increased.

Therefore, the heat exchange area of the radiant waste boiler is increased by adding a layer of heat exchange tube group (also called an external heat exchange tube group) on the outer side of the waste boiler channel, the flow area of the synthesis gas is increased, and the large space is not occupied. And in order to improve the heat exchange efficiency, the gas amount of the synthesis gas of the gasification furnace can be increased.

With the increase of the synthetic gas amount of the gasification furnace, the speed of the synthetic gas flowing through the chilling chamber is too high, insufficient washing can exist, the ash content in the synthetic gas is high, and the subsequent pipeline is easy to block. In addition, the synthesis gas treated by the external heat exchange tube group still has higher temperature, so that the requirement on an after-treatment system is higher.

Disclosure of utility model

The object of the present application is to provide a device for heat recovery and purification of an ash containing gas stream which solves or alleviates the above-mentioned problems of the prior art.

In order to achieve the above object, the present application provides the following technical solutions:

An apparatus for heat recovery and purification of an ash-containing gas stream, comprising: a gasification furnace 1, a chilling chamber 2 and a synthesis gas pipeline 3; the chilling chamber 2 is arranged outside the gasification furnace 1 and is connected with the chilling chamber 2 through the synthesis gas pipeline 3;

The gasification furnace 1 is used for carrying out fuel gasification treatment on fuel and obtaining a first ash-containing air flow, and carrying out heat recovery and ash removal treatment on the first ash-containing air flow after the fuel gasification treatment so as to obtain a second ash-containing air flow;

The second ash containing gas stream is conveyed through a syngas conduit 3 into the quench chamber 2 such that the quench chamber 2 washes and cools the second ash containing gas stream.

Optionally, the gasification furnace 1 includes: the gasification chamber 11 is communicated with the radiation waste pot 12 through a connecting section 13, the gasification chamber 11 is used for carrying out fuel gasification treatment on fuel and obtaining a first ash-containing air flow, the first ash-containing air flow is conveyed into the radiation waste pot 12 through the connecting section 13, and the radiation waste pot 12 is used for carrying out heat recovery and ash removal treatment on the first ash-containing air flow so as to obtain a second ash-containing air flow.

Optionally, the radiant waste kettle 12 comprises: a waste boiler steam inlet 121, a waste boiler steam outlet 122, a first heat exchange tube group 123 and a second heat exchange tube group 124;

the waste boiler steam inlet 121, the waste boiler steam outlet 122 and the first heat exchange tube group 123 form a first radiation heat exchange channel so as to perform a first radiation heat exchange treatment on the first ash-containing gas stream based on the first radiation heat exchange channel;

The waste boiler steam inlet 121, the waste boiler steam outlet 122 and the second heat exchange tube group 124 form a second radiation heat exchange channel, so as to perform a second radiation heat exchange treatment and an ash removal treatment on the first ash-containing air flow after the first radiation heat exchange treatment based on the first radiation heat exchange channel and the second radiation heat exchange channel.

Alternatively, the waste boiler steam inlet 121 is respectively communicated with the first heat exchange tube group 123 and the second heat exchange tube group 124, and the waste boiler steam outlet 122 is respectively communicated with the first heat exchange tube group 123 and the second heat exchange tube group 124 to form steam which is subjected to radiation heat exchange with the first ash-containing air flow in the first heat exchange tube group 123 and the second heat exchange tube group 124, and the first radiation heat exchange channel and the second radiation heat exchange channel are respectively formed by multiplexing the waste boiler steam inlet 121 and multiplexing the waste boiler steam outlet 122.

Optionally, the quench chamber 2 comprises: the synthesis gas pipeline 3 passes through the protection air cavity 21 and is communicated with the chilling cavity 23, and the protection air cavity 21 and the chilling cavity 23 are mutually isolated so as to convey the second ash-containing air flow into the chilling cavity 23 for washing and cooling treatment.

Optionally, the protective gas cavity 21 is provided with a protective gas inlet 211 and a protective gas outlet 212, so that the protective gas cavity 21 is inflated through the protective gas inlet 211 and can flow out through the protective gas outlet 212 to form the continuously-introduced protective gas.

Optionally, the quench chamber 2 further comprises a support structure 22, the support structure 22 being arranged between the protective air cavity 21 and the quench chamber 23 such that the protective air cavity 21 and the quench chamber 23 are isolated from each other and support the syngas conduit 3, the inner side of the syngas conduit 3 being heat insulated.

Optionally, a quench ring (232) is provided on the support structure (22), and a downcomer (231) is provided below the quench ring (232).

Optionally, an ascending pipe 234 is further disposed at the periphery of the descending pipe 231 and forms a pipeline annular space along the vertical direction, the ascending pipe 234 is fixed in the quench chamber 2 by a support frame 235, and a washing water pipe 2341 is disposed on the ascending pipe 234, and the washing water pipe 2341 is communicated with a washing water inlet pipe 2342 to receive washing water from the washing water inlet pipe 2342 and spray the washing water into the pipeline annular space to wash the second ash-containing air stream entering the pipeline annular space.

Optionally, a fixing block (213) is disposed in the protection air cavity 21, and the fixing block (213) is used for fixing the synthesis gas pipeline 3 above the chilling cavity 23 so as to widen the flow passage of the synthesis gas pipeline 3.

In the technical scheme provided by the application, the equipment for heat recovery and purification of the ash-containing air flow comprises: a gasification furnace 1, a chilling chamber 2 and a synthesis gas pipeline 3; the chilling chamber 2 is arranged outside the gasification furnace 1 and is connected with the chilling chamber 2 through the synthesis gas pipeline 3; the gasification furnace 1 is used for carrying out fuel gasification treatment on fuel and obtaining a first ash-containing air flow, and carrying out heat recovery and ash removal treatment on the first ash-containing air flow after the fuel gasification treatment so as to obtain a second ash-containing air flow; the second ash containing gas stream is conveyed through a syngas conduit 3 into the quench chamber 2 such that the quench chamber 2 washes and cools the second ash containing gas stream. Therefore, the chilling chamber 2 is additionally arranged outside the gasification furnace 1, and the first ash-containing air flow is subjected to cooling treatment and ash removal treatment for a plurality of times based on the cooperation of the gasification furnace 1 and the chilling chamber 2, so that the ash content in the obtained synthetic gas is as low as possible, and the subsequent complexity and requirements for treating the synthetic gas with ash are greatly reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. Wherein:

FIG. 1 is a schematic view of an apparatus for heat recovery and purification of an ash-containing gas stream according to an embodiment of the application;

FIG. 2 is a schematic diagram of a wash water coil in accordance with an embodiment of the present application;

FIG. 3 is a schematic diagram showing the relationship between the spray head and the riser pipe according to an embodiment of the present application.

Detailed Description

In the figure: a gasification furnace 1; a gasification chamber 11; a radiation waste pan 12; a waste boiler steam inlet 121; a waste boiler steam outlet 122; a first heat exchange tube group 123; a second heat exchange tube group 124; a connecting section 13; a slag collection chamber 14; a quench chamber 2; a protective air chamber 21; a shielding gas inlet 211; a shielding gas outlet 212; a fixed block 213; expansion joint 214; a support structure 22; a quench chamber 23; a down pipe 231; a quench ring 232; a chilled water inlet pipe 233; a riser 234; wash water coil 2341; a washing water inlet pipe 2342; a washing water spray head 2343; a support 235; a water bath inlet 236; a water bath 237; a synthesis gas pipeline 3; and a burner 4.

The application will be described in detail below with reference to the drawings in connection with embodiments. The examples are provided by way of explanation of the application and not limitation of the application. Indeed, it will be apparent to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the application. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment. Accordingly, it is intended that the present application encompass such modifications and variations as fall within the scope of the appended claims and their equivalents.

In the description of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present application and do not require that the present application must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. The terms "coupled," "connected," and "configured" as used herein are to be construed broadly and may be, for example, fixedly connected or detachably connected; can be directly connected or indirectly connected through an intermediate component; the specific meaning of the terms described above will be understood by those of ordinary skill in the art as the case may be.

FIG. 1 is a schematic diagram of an apparatus for heat recovery and purification of an ash-containing gas stream according to an embodiment of the application; FIG. 2 is a schematic diagram of a wash water coil in accordance with an embodiment of the present application; FIG. 3 is a schematic diagram showing the relationship between the spray head and the riser pipe according to an embodiment of the present application.

As shown in fig. 1, the apparatus for heat recovery and purification of an ash-containing gas stream comprises: a gasification furnace 1, a chilling chamber 2 and a synthesis gas pipeline 3; the chilling chamber 2 is arranged outside the gasification furnace 1 and is connected with the chilling chamber 2 through the synthesis gas pipeline 3; the gasification furnace 1 is used for carrying out fuel gasification treatment on fuel and obtaining a first ash-containing air flow, and carrying out heat recovery and ash removal treatment on the first ash-containing air flow after the fuel gasification treatment so as to obtain a second ash-containing air flow; the second ash containing gas stream is conveyed through a syngas conduit 3 into the quench chamber 2 such that the quench chamber 2 washes and cools the second ash containing gas stream.

In this embodiment, since the fuel is gasified to obtain the ash-containing synthesis gas, the ash-containing synthesis gas is referred to as a first ash-containing gas stream. The first ash-containing gas stream is subjected to ash removal after the fuel gasification process, and therefore, although the ash content is reduced after the ash removal process is performed on the first ash-containing gas stream, a synthesis gas still containing ash is obtained, and therefore, the synthesis gas is referred to as a second ash-containing gas stream.

According to the scheme of the embodiment, the chilling chamber 2 is additionally arranged outside the gasification furnace 1, and the first ash-containing air flow is subjected to cooling treatment and ash removal treatment for a plurality of times based on the cooperation of the gasification furnace 1 and the chilling chamber 2, so that the ash content in the obtained synthesis gas is as low as possible, the subsequent treatment complexity and requirements on the synthesis gas with ash are greatly reduced, the space of equipment is saved, the pipeline is reduced, and the cost of the equipment is reduced.

In this embodiment, the specific number of the quench chambers 2 is not limited, and one quench chamber may be connected to the gasifier, or a plurality of quench chambers may be connected to the gasifier. The gasification furnace 1 and the chilling chamber 2 can be in one-to-one relationship or one-to-many relationship, and the relationship is determined according to application scenes. In addition, the medium for realizing the cooling and ash removal treatment can be water or other cooling media, and the medium is specifically selected according to application scenes.

In this embodiment, the gasification furnace 1 includes: the gasification chamber 11 is communicated with the radiation waste pot 12 through a connecting section 13, the gasification chamber 11 is used for carrying out fuel gasification treatment on fuel and obtaining a first ash-containing air flow, the first ash-containing air flow is conveyed into the radiation waste pot 12 through the connecting section 13, and the radiation waste pot 12 is used for carrying out heat recovery and ash removal treatment on the first ash-containing air flow so as to obtain a second ash-containing air flow.

For example, fuel and oxides enter the gasification chamber 11 through the burner 4, and are combusted in the gasification chamber 11 to gasify the fuel to obtain a first ash-containing gas stream.

In addition, in this embodiment, the gasification furnace 1 further includes: a slag collection chamber 14 for collecting ash from the radiant waste kettle 12 in the ash removal process of the first ash-containing gas stream. The gasification chamber 11, the radiant waste pot 12 and the slag collection chamber 14 can be communicated sequentially from top to bottom.

For this reason, in the present embodiment, the presence of said connecting section 13 makes it possible to reduce the speed fluctuations of the synthesis gas and ash in the first ash-containing gas stream, so that the first ash-containing gas stream can enter the radiant waste boiler 12 uniformly; and in the radiant waste cooker 12, the heat recovery is achieved by the heat radiation capacity of the gas and ash at the time of heat recovery. Since the ash removal treatment of the first ash containing gas stream is also effected in the radiant waste kettle 12, the resulting ash can be collected in the ash collection chamber 14. For this reason, a large amount of waste heat in the first ash containing gas stream is absorbed before entering the quench chamber 23 to form a second ash containing gas stream, and therefore the temperature of the second ash containing gas stream entering the quench chamber 2 is low, reducing the energy consumption of the second ash containing gas stream when the quench chamber 2 is cooled.

In this embodiment, the radiant waste kettle 12 comprises: a waste boiler steam inlet 121, a waste boiler steam outlet 122, a first heat exchange tube group 123 and a second heat exchange tube group 124; the waste boiler steam inlet 121, the waste boiler steam outlet 122 and the first heat exchange tube group 123 form a first radiation heat exchange channel so as to perform a first radiation heat exchange treatment on the first ash-containing gas stream based on the first radiation heat exchange channel; the waste boiler steam inlet 121, the waste boiler steam outlet 122 and the second heat exchange tube group 124 form a second radiation heat exchange channel, so as to perform a second radiation heat exchange treatment and an ash removal treatment on the first ash-containing air flow after the first radiation heat exchange treatment based on the first radiation heat exchange channel and the second radiation heat exchange channel.

In the present embodiment, the first heat exchange tube group 123 and the second heat exchange tube group 124 form an airflow circulation gap; the first radiation heat exchange channel enables the first ash-containing gas stream to flow downwards from the gasification chamber 11 so as to perform first radiation heat exchange treatment on the first ash-containing gas stream; the airflow flowing annular gap enables the first ash-containing airflow after the first radiation heat exchange treatment to flow from bottom to top, and the second radiation heat exchange treatment and the ash removal treatment are carried out on the first ash-containing airflow after the first radiation heat exchange treatment based on the first radiation heat exchange channel and the second radiation heat exchange channel.

In this embodiment, the waste boiler steam inlet 121 is respectively communicated with the first heat exchange tube group 123 and the second heat exchange tube group 124, and the waste boiler steam outlet 122 is respectively communicated with the first heat exchange tube group 123 and the second heat exchange tube group 124 to form steam which is subjected to radiation heat exchange with the first ash-containing air flow in the first heat exchange tube group 123 and the second heat exchange tube group 124, and the first radiation heat exchange channel and the second radiation heat exchange channel are respectively formed by multiplexing the waste boiler steam inlet 121 and multiplexing the waste boiler steam outlet 122.

Based on the above-mentioned waste boiler steam inlet 121, waste boiler steam outlet 122, first heat exchange tube group 123, second heat exchange tube group 124, when carrying out heat recovery and ash removal treatment to the first ash-containing air flow and obtaining the second ash-containing air flow, the first ash-containing air flow is firstly heat exchanged with the first radiation heat exchange channel from top to bottom, then the bottom of the first heat exchange tube group 123 is changed from bottom to top, thereby entering an air flow annular space, and when carrying out heat exchange with the first radiation heat exchange channel again, heat exchange is carried out with the second radiation heat exchange channel to realize cooling, meanwhile, some ash residues in the first ash-containing air flow cannot flow upwards along with the air flow and sink into the slag collecting chamber 14 due to gravity, only other small particle ash residues are entrained by the air flow to form the second ash-containing air flow, and the second ash-containing air flow enters the chilling chamber 2 through the synthesis gas pipeline 3.

In this embodiment, the principle of performing heat radiation and heat exchange based on the first radiation and heat exchange channels is as follows: the low-temperature water vapor is filled into the first heat exchange tube group 123 and the second heat exchange tube group 124 through the waste boiler water vapor inlet 121, so that heat exchange is performed between the first ash-containing air flow and the low-temperature water vapor by taking the first heat exchange tube group 123 and the second heat exchange tube group 124 as heat exchange walls to obtain the high-temperature water vapor, and the high-temperature water vapor is sent out through the waste boiler water vapor outlet 122.

In addition, in this embodiment, the first radiation heat exchange channel and the second radiation heat exchange channel are formed by multiplexing the waste boiler steam inlet 121 and the waste boiler steam outlet 122, so that the pipelines can be reduced, and the space can be reasonably utilized.

In this embodiment, in order to protect the wall surface of the pipeline, the inside of the synthesis gas pipeline 3 is subjected to heat insulation treatment, and the heat insulation treatment may be laid with refractory materials or form a water jacket, and the specific protection measures are considered according to the actual situation, and are not limited in the present application.

In this embodiment, the quench chamber 2 comprises: the synthesis gas pipeline 3 passes through the protection air cavity 21 and is communicated with the chilling cavity 23, and the protection air cavity 21 and the chilling cavity 23 are mutually isolated so as to convey the second ash-containing air flow into the chilling cavity 23 for washing and cooling treatment.

In this embodiment, the protection gas chamber 21 is provided with a protection gas inlet 211 and a protection gas outlet 212, so that the protection gas chamber 21 is inflated through the protection gas inlet 211, and the protection gas can flow out through the protection gas outlet 212 to form the protection gas that is continuously introduced.

In this embodiment, the quench chamber 2 further comprises a support structure 22, the support structure 22 being arranged between the protection gas cavity 21 and the quench chamber 23 such that the protection gas cavity 21 and the quench chamber 23 are isolated from each other and support the syngas conduit 3. Wherein, the protective gas filled in the protective air cavity 21 is selected from CO ₂ or N ₂.

In this embodiment, a quench ring (232) is disposed on the support structure 22, and a downcomer (231) is disposed below the quench ring (232).

The quench ring 232 is in communication with a quench water inlet pipe 233 to receive quench water from the quench water inlet pipe 233, and spray the quench water into the quench chamber 23 to cool the second ash containing gas stream and/or form a protective water film on the surface of the downcomer 231.

In this embodiment, the side of the quench ring 232 facing the quench chamber 23 has an opening or spray head to spray the quench water into the quench chamber 23 and/or to form a protective water film on the surface of the drop tube 231.

In this embodiment, the periphery of the down pipe 231 is further provided with a riser pipe 234 and forms a pipeline annular space along the vertical direction, the riser pipe 234 is fixed in the quench chamber 2 by a support frame 235, and the riser pipe 234 is provided with a wash water pipe 2341, and the wash water pipe 2341 is communicated with a wash water inlet pipe 2342 to receive wash water from the wash water inlet pipe 2342 and spray the wash water into the pipeline annular space to wash the second ash-containing air flow entering the pipeline annular space.

As shown in fig. 2 to 3, the washing water coil 2341 is provided with a plurality of washing water spray nozzles 2343 for spraying the washing water into the pipe annular space, and a set angle, for example, an angle α, which is 90 ° or less, is formed between the central axis of the washing water spray nozzle 2343 and the central axis of the riser pipe 234.

In this embodiment, the number of turns of the washing water coil 2341 is not limited, and may be one or more turns, for example, according to the application scenario.

In this embodiment, a water bath water inlet 236 is disposed below the chilling cavity 23, so as to inject mixed water into the chilling cavity 23 to form a water bath 237, and the second ash-containing gas flows through the chilling cavity 23 to be cooled and then enters the water bath 237 to be cooled again, and after the cooling again, a second ash-containing gas flow entering the annular space of the pipeline is formed.

In the above-mentioned chilling cavity 23 provided according to the present embodiment, the chilling water inlet pipe 233 continuously supplies chilling water, so that the chilling ring 232 maintains continuous water supply, and the second ash-containing air flow is cooled again, and at the same time, the ash in the second ash-containing air flow is washed. In addition, after the chilled water in the chilled ring 232 flows out, a part of the chilled water exchanges heat with the second ash-containing air flow to be heated and evaporated, and a part of the chilled water flows down along the downcomer to form a layer of protective water film on the outer side of the downcomer, so that the effect of protecting the downcomer is achieved. The second ash-containing gas stream, which is cooled after evaporating a portion of the chilled water, is re-introduced into the water bath 237 along the quench chamber 23 and exchanges heat with a substantial amount of water in the water bath 237 such that it flows upwardly along the annulus between the riser and downcomer after being cooled to a temperature consistent with the water bath 237, and is thus delivered outwardly through the syngas outlet.

In addition, the washing water inlet pipe 2342 is communicated with the washing water inlet coil pipe, and the washing water inlet coil pipe is provided with the washing water spray head 2343, so that uninterrupted spraying of the washing water is realized, the washing water is reversely contacted with the upward second ash-containing air flow, collision of the washing water and the second ash-containing air flow is realized between the ascending pipe and the descending pipe, a turbulent flow area is formed, and the cooling treatment is realized, and meanwhile, the washing of the second ash-containing air flow is more facilitated. After the momentum balance is formed between the wash water and the second ash-containing gas stream, a gas-liquid-solid three-phase separation is performed in the riser, and the liquid and ash fall into the water bath 237 and can be discharged, so that the second ash-containing gas stream separates the synthesis gas, and part of tiny water drops carried by the synthesis gas upwards travel along the riser and are discharged from the synthesis gas outlet.

In addition, it should be noted that, in the process of operating the apparatus for heat recovery and purification of the ash-containing air flow, since the apparatus is in a high pressure working condition, the second ash-containing air flow still has a higher temperature after entering the quench chamber 2, so, in order to ensure that the second ash-containing air flow only remains in the quench chamber 23 and does not leak from the quench chamber 23 to the protection air chamber 21, the protection air chamber 21 is continuously introduced with the protection air, so that sufficient pressure is maintained in the protection air chamber 21 to avoid the second ash-containing air flow leaking from the quench chamber 23 to the protection air chamber 21, and meanwhile, the effect of instantly cooling the second ash-containing air flow can be achieved.

In this embodiment, a fixing block 213 is disposed in the protection air cavity 21, and the fixing block 213 is used to fix the syngas pipe 3 above the quench cavity 23, so as to widen the flow passage of the syngas pipe 3. The widening of the flow path of the synthesis gas conduit 3 reduces the flow rate of the second ash containing gas stream.

The quench ring 232 is disposed on the support structure 22 in welded relationship with the bottom of the anchor block 213.

In this embodiment, an expansion joint 214 is further disposed above the fixing block 213, and the expansion joint 214 is communicated with the synthesis gas pipeline 3.

Specifically, as shown in fig. 1, a fixed block 213 is sleeved on the elbow of the syngas pipeline 3 after entering the quench chamber 2, and an expansion joint 214 is added above the fixed block 213 to compensate for deformation of the second ash-containing gas flow in the syngas pipeline 3 due to temperature change. The expansion joint 214 is for example a length of elastic tubing welded directly to the connecting gas line 3 and located above the fixed block 213.

In addition, in the present embodiment, the pipe section of the syngas pipe 3 after entering the quench chamber 2, the support structure 22 and the fixing blocks 213 use wear-resistant and high temperature-resistant materials.

It is noted that the term "comprising" in the description of the application and the claims and the above figures is intended to cover a non-exclusive inclusion. In the present application, the terms "upper", "lower", "vertical", "horizontal", etc. refer to the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and these terms are mainly used for better describing the present application and its embodiments, and are not intended to limit the indicated components to have a specific orientation. The terms "first," "second," and the like are used for distinguishing, and are not limited in number. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

The above is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. An apparatus for heat recovery and purification of an ash-containing gas stream, comprising: a gasification furnace (1), a chilling chamber (2) and a synthesis gas pipeline (3); the chilling chamber (2) is arranged outside the gasifier (1) and is connected with the chilling chamber (2) through the synthesis gas pipeline (3);

The gasifier (1) is used for carrying out fuel gasification treatment on fuel and obtaining a first ash-containing air flow, and carrying out heat recovery and ash removal treatment on the first ash-containing air flow after the fuel gasification treatment so as to obtain a second ash-containing air flow;

The second ash-containing gas stream is conveyed into the quench chamber (2) via a syngas conduit (3) such that the quench chamber (2) washes and cools the second ash-containing gas stream.

2. An apparatus for heat recovery and purification of an ash containing gas stream according to claim 1, characterized in that the gasifier (1) comprises: the gasification device comprises a gasification chamber (11) and a radiation waste pot (12), wherein the gasification chamber (11) is communicated with the radiation waste pot (12) through a connecting section (13), the gasification chamber (11) is used for carrying out fuel gasification treatment on fuel and obtaining first ash-containing air flow, the first ash-containing air flow is conveyed into the radiation waste pot (12) through the connecting section (13), and the radiation waste pot (12) is used for carrying out heat recovery and ash removal treatment on the first ash-containing air flow so as to obtain second ash-containing air flow.

3. An apparatus for heat recovery and purification of an ash containing gas stream according to claim 2, characterised in that said radiant waste boiler (12) comprises: a waste boiler steam inlet (121), a waste boiler steam outlet (122), a first heat exchange tube group (123) and a second heat exchange tube group (124);

The waste boiler steam inlet (121), the waste boiler steam outlet (122) and the first heat exchange tube group (123) form a first radiation heat exchange channel so as to perform first radiation heat exchange treatment on the first ash-containing air flow based on the first radiation heat exchange channel;

the waste boiler steam inlet (121), the waste boiler steam outlet (122) and the second heat exchange tube group (124) form a second radiation heat exchange channel, so that the first ash-containing air flow after the first radiation heat exchange treatment is subjected to second radiation heat exchange treatment and ash removal treatment based on the first radiation heat exchange channel and the second radiation heat exchange channel.

4. An apparatus for heat recovery and purification of an ash containing gas stream according to claim 3, characterised in that the waste boiler steam inlet (121) communicates with the first heat exchange tube bank (123) and the second heat exchange tube bank (124) respectively, and the waste boiler steam outlet (122) communicates with the first heat exchange tube bank (123) and the second heat exchange tube bank (124) respectively to form steam in the first heat exchange tube bank (123) and the second heat exchange tube bank (124) for radiation heat exchange with the first ash containing gas stream and to form the first radiation heat exchange channel and the second radiation heat exchange channel by multiplexing the waste boiler steam inlet (121), multiplexing the waste boiler steam outlet (122) respectively.

5. An apparatus for heat recovery and purification of an ash containing gas stream according to claim 1, characterised in that the quench chamber (2) comprises: the synthesis gas pipeline (3) passes through the protection air cavity (21) and is communicated with the chilling cavity (23), and the protection air cavity (21) and the chilling cavity (23) are mutually isolated so as to convey the second ash-containing air flow into the chilling cavity (23) for washing and cooling treatment.

6. An apparatus for heat recovery and purification of an ash containing gas stream according to claim 5, characterised in that the protective gas chamber (21) is provided with a protective gas inlet (211) and a protective gas outlet (212) for charging the protective gas chamber (21) through the protective gas inlet (211) and being able to flow out through the protective gas outlet (212) for forming a continuous inflow of the protective gas.

7. An apparatus for heat recovery and cleaning of an ash containing gas stream according to claim 5, characterised in that the quench chamber (2) further comprises a support structure (22), the support structure (22) being arranged between the protective gas cavity (21) and the quench chamber (23) such that the protective gas cavity (21) and the quench chamber (23) are isolated from each other and support the synthesis gas conduit (3), the inside of the synthesis gas conduit (3) being heat insulated.

8. An apparatus for heat recovery and cleaning of an ash containing gas stream according to claim 7, characterised in that a quench ring (232) is provided on the support structure (22), a downcomer (231) being provided below the quench ring (232).

9. The apparatus for heat recovery and purification of an ash containing gas stream according to claim 8, characterized in that the periphery of the down pipe (231) is further provided with a riser pipe (234) and is vertically oriented to form a pipeline annulus, the riser pipe (234) is fixed in the quench chamber (2) by a support bracket (235), and that a wash water coil (2341) is provided on the riser pipe (234), the wash water coil (2341) being in communication with a wash water inlet pipe (2342) to receive wash water from the wash water inlet pipe (2342) and to spray the wash water into the pipeline annulus to wash a second ash containing gas stream entering the pipeline annulus.

10. An apparatus for heat recovery and cleaning of ash containing gas streams according to any of the claims 5-9, characterised in that a fixed block (213) is provided in the protective gas chamber (21), which fixed block (213) is used to fix the synthesis gas pipe (3) above the quench chamber (23) to widen the flow path of the synthesis gas pipe (3).