CN215365620U

CN215365620U - Gasifier water-cooled wall internals structure

Info

Publication number: CN215365620U
Application number: CN202121014833.5U
Authority: CN
Inventors: 张武玄; 倪建军; 苏智彬; 施建平; 池国镇
Original assignee: Shanghai Boiler Works Co Ltd
Current assignee: Shanghai Boiler Works Co Ltd
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2021-12-31
Anticipated expiration: 2031-05-12

Abstract

The utility model provides a water-cooled wall internal part structure of a gasification furnace, which relates to the field of gasification furnaces and comprises an introducing pipe, a water inlet collecting tank, a membrane type water-cooled wall, a water outlet collecting tank, a leading-out pipe, a burner water-cooled cover, a slag hole, a blower and a balance pipe; the membrane water-cooled wall is of a tubular cylindrical structure consisting of a plurality of water passing pipes and fins, an introducing pipe is connected to a water inlet header from a water inlet pipe nozzle of a gasification furnace shell to supply water to the membrane water-cooled wall, water in each water passing pipe of the membrane water-cooled wall flows from bottom to top, the water absorbs gasification heat and then enters a water outlet header, the water outlet header collects water, an upper connector of a slag hole is matched with a lower necking of the membrane water-cooled wall, and a lower connector of the slag hole is matched with an inlet of a radiation waste boiler; the structure of the water-cooled wall internal part of the gasification furnace improves the safety and reliability of the gasification furnace, reduces the maintenance frequency, adopts a refractory brick form at a slag hole, effectively insulates heat, is beneficial to slag discharge, and can be accurately matched with a radiation waste boiler with a refractory brick channel at an inlet.

Description

Gasifier water-cooled wall internals structure

Technical Field

The utility model belongs to the field of gasification furnaces, and particularly relates to a water-cooled wall internal part structure of a gasification furnace.

Background

The coal gasification technology is one of the key technologies for cleaning and efficiently utilizing coal resources. In recent years, with the increase of energy demand and the increase of environmental protection requirements, the coal gasification technology is developing towards high gasification temperature, high carbon conversion rate and wide coal type adaptability, and the requirements on a coal gasification device, particularly a core device, namely a gasification furnace are continuously increased.

The gasification technology with the radiation waste heat boiler (RSC) is in a leading position compared with other gasification technologies at present, and the radiation waste heat boiler (RSC) can recover high-level heat energy generated by gasification reaction, so that a large amount of superheated steam is generated and is used for a downstream process, and the purposes of energy conservation and emission reduction are achieved.

The gasification furnaces are divided into a refractory brick gasification furnace and a water-cooled wall gasification furnace according to the type of a hearth. The refractory brick gasification furnace has the advantages of simple structure, low construction cost, higher operation and maintenance cost, low online rate and limited gasification temperature; the water-cooled wall gasifier has the advantages of high gasification temperature, high safety and reliability, high online rate, low operation and maintenance cost, relatively complex structure and configuration and higher construction cost.

At present, a firebrick gasifier is mostly adopted in the gasification technology with a radiation waste boiler (RSC), and the problems of frequent maintenance, low on-line rate, high brick changing cost and the like still exist. If a water-cooled wall gasifier is adopted, the adaptability of the water-cooled wall structure and the interface matching of the gasifier and a radiation waste boiler (RSC) are difficult points and key points of design.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a water-cooled wall internal part structure of a gasification furnace, which aims to solve the problems in the background technology.

In order to solve the technical problem, the utility model provides a water-cooled wall internal part structure of a gasification furnace, which comprises an introducing pipe, a water inlet collecting tank, a membrane type water-cooled wall, a water outlet collecting tank, a leading-out pipe, a burner water-cooled cover, a slag hole, a blower and a balance pipe;

the membrane water-cooling wall is of a tube array cylindrical structure consisting of a plurality of water through tubes and fins, a gasification chamber hearth is arranged inside the membrane water-cooling wall, and an upper necking and a lower necking are respectively arranged at two ends of the membrane water-cooling wall;

the water inlet header is positioned at the bottom of the membrane water-cooled wall, and the water outlet header is positioned at the top of the membrane water-cooled wall;

the inlet end of the introducing pipe is connected with a water inlet pipe nozzle on a gasification furnace shell, the gasification furnace shell is positioned on the outer side of the membrane water-cooled wall, and the outlet end of the introducing pipe is connected with the water inlet header; the two ends of each water through pipe of the membrane water-cooled wall are respectively connected with the water inlet header and the water outlet header, the inlet end of the lead-out pipe is connected with the water outlet header, and the outlet end of the lead-out pipe is connected with a water outlet pipe nozzle on the shell of the gasification furnace; the burner water cooling cover is connected between a burner mounting opening of the gasifier shell and an upper necking of the membrane water wall and is matched with the upper necking of the membrane water wall;

the slag hole is a cylindrical channel and is connected between the lower necking of the membrane water-cooled wall and the inlet of the radiation waste boiler, the upper interface of the slag hole is matched with the lower necking of the membrane water-cooled wall, and the lower interface of the slag hole is matched with the inlet of the radiation waste boiler.

The leading-in pipe is connected to the water inlet header from a water inlet pipe nozzle of the gasifier shell, supplies water for the membrane water-cooled wall, and simultaneously provides integral support for the internal part structure of the membrane water-cooled wall.

The membrane type water-cooled wall is of a tube array type cylindrical structure consisting of water passing tubes and fins, and the fin tubes are mainly used for increasing a heating surface or dissipating heat and improving heat transfer efficiency. The water pipes are kept at a certain pitch, the upper necking of the membrane water-cooling wall is matched with the burner water-cooling cover, the lower necking of the membrane water-cooling wall is matched with the slag hole, the water pipes at the necking sections jump according to the arrangement condition and the pitch requirement, and the jumping of the water pipes is realized by jumping the water pipes out of the tube panel along the direction of forming the tube panel.

The water-cooled wall is usually laid on the inner wall surface of the hearth and is mainly used for absorbing radiant heat emitted by flame and high-temperature flue gas in the furnace, and has the functions of cooling and protecting the furnace wall.

Modern large and medium boilers generally adopt a membrane water-cooled wall which is formed by rolled fin tubes, and fins of adjacent tubes are connected and welded into a whole by electric welding. The membrane water wall has the advantages that: the hearth has good sealing property, reduces air leakage, can reduce smoke exhaust loss and is beneficial to micro-positive pressure combustion; the furnace wall can be fully protected, so that the thickness and the weight of the furnace wall can be reduced, and a suspension structure is favorably adopted; the coking condition in the furnace can be improved; the pre-combination degree of the parts of the boiler is improved, and the installation workload can be reduced; compared with a light pipe water-cooled wall, the heat absorption capacity of the pipe is improved. Therefore, most of the boilers produced in recent years in China adopt membrane water-cooled walls. Membrane water walls require that thermal deflection between adjacent tubes be minimized to prevent tube damage due to thermal stresses induced by thermal deflection. In order to bear the pressure of deflagration generated by a hearth or the combustion pressure fluctuation in a furnace, and the structure of the water-cooled wall is deformed or damaged, rigid beams are required to be arranged around the outer side of the furnace wall in a layered mode, so that the whole water-cooled wall becomes a rigid whole.

Further, the water passing pipe comprises a straight cylinder part, an upper necking part, a lower necking part, an upper interface part and a lower interface part, wherein the straight cylinder part, the upper necking part and the lower necking part are all linear, the straight cylinder part is vertically placed, two ends of the straight cylinder part are respectively connected with the upper necking part and the lower necking part to form a trapezoidal structure without a lower bottom surface, the upper interface part is connected with the other end of the upper necking part, and the other end of the lower necking part is connected with the lower interface part.

Furthermore, the slag hole is a cylindrical channel composed of a cylinder wall, a supporting plate and refractory bricks, the cylinder wall is located outside the slag hole, the supporting plate and the refractory bricks are located inside the cylinder wall, the supporting plate comprises a supporting plate and a reinforcing rib plate, the supporting plate is connected with the cylinder wall, and the refractory bricks are laid on the supporting plate and form the cylindrical channel in the cylinder wall.

The design of the waste boiler is related to the specific gasification process, the temperature field and the flow field in the waste boiler, the waste boiler inlet of some gasification process technologies is of a refractory brick structure, slag blocking possibly occurs in the connecting part of the internal part structure of the gasification furnace and the radiation waste boiler in the operation process, the waste boiler is required to be disassembled, assembled and replaced, the purpose of designing a slag hole is to solve the replacement problem during slag blocking, and the structure of the slag hole is designed according to the inlet structure of the radiation waste boiler so as to be matched with the inlet structure.

An upper interface of the slag hole is matched with a lower necking of the membrane water wall, and a lower interface of the slag hole is matched with an inlet of a radiation waste boiler; the interior of the slag hole and the inlet of the radiation waste boiler are provided with refractory brick channels, so that the slag hole of the water-cooled wall internal part can be accurately matched with the radiation waste boiler, the heat insulation is effectively realized, the slag discharge is facilitated, the components, the flow field and the temperature field of process gas at the inlet of the radiation waste boiler (RSC) can meet the process requirements, and the process performance of the radiation waste boiler can be ensured.

The technological package of the gasification technology is designed to maintain the temperature of the inlet material of the radiation waste boiler (RSC) and avoid slag bonding and slag blocking, the inlet of the radiation waste boiler (RSC) is designed into a refractory brick structure, the outlet of the internal part of the water-cooled wall of the gasification furnace is matched with the inlet structure of the waste boiler (RSC), the inlet refractory brick structure of the radiation waste boiler (RSC) extends upwards and is connected with the lower necking of the membrane water-cooled wall of the gasification furnace in a matching way through a slag hole.

Furthermore, the blower is positioned at the bottom of an annular space between the membrane water-cooled wall and the gasifier shell, the blower is connected with a blowing gas inlet nozzle on the gasifier shell, the blower is of a ring pipe structure, air inlets are uniformly distributed in a ring pipe, and a baffle is arranged outside each air inlet.

And blowing gas and protective gas are introduced into the blower to maintain the pressure balance inside and outside the hearth and simultaneously clean fly ash between the hearth and the shell of the gasification furnace.

Because the air inlet speed of the purge gas and the protective gas is higher, in order to avoid directly scouring the water-cooled wall internals of the gasification furnace, a baffle is arranged outside the air inlet.

Furthermore, the balance pipe is positioned in a gap between the upper necking of the membrane water-cooled wall and the burner water-cooled cover, and is communicated with a hearth of the gasification chamber and an annular space, so that the effect of balancing the pressure inside and outside the hearth is achieved.

Furthermore, the heating surfaces of the membrane water-cooling wall and the burner water-cooling cover are coated with refractory linings for protecting the membrane water-cooling wall.

Furthermore, the water inlet header and the water outlet header are both of a ring pipe structure, and the water inlet header is provided with a nozzle connected with the lower connecting part on the leading-in pipe and the water through pipe; and the water outlet header is provided with a nozzle connected with the upper connecting part on the leading-out pipe and the water through pipe.

The water inlet header is positioned at the bottom of the membrane water-cooled wall, water is collected and distributed to the water through pipes of the membrane water-cooled wall, water in the water through pipes of the membrane water-cooled wall flows from bottom to top, the water absorbs heat on a gasification side and then enters the water outlet header, and the water outlet header is positioned at the top of the membrane water-cooled wall and collects water.

Further, the eduction tube is of a spiral coiling structure.

The outlet pipe is connected to a water outlet pipe nozzle of the gasification furnace shell from the water outlet header, and the saturated water vapor after heat absorption is led out, and the outlet pipe is of a spiral winding structure and can absorb the thermal expansion displacement difference between the inner part of the water-cooled wall and the gasification furnace shell.

The gasifier runs at a high temperature, and the temperature of the internal part of the water-cooled wall and the shell of the gasifier are different in the processes of starting and stopping and in the temperature fluctuation state, so that the corresponding thermal expansion amount is different, and the difference value of the thermal expansion amounts between the internal part of the water-cooled wall and the shell of the gasifier, namely the thermal expansion displacement difference, exists between the internal part of the water-cooled wall and the shell of the gasifier.

Further, the burner water cooling cover is a coil pipe structure consisting of a water through pipeline and a cylinder, the cylinder is located on the upper portion of the water through pipeline, two ends of the water through pipeline are respectively connected with a water through pipeline water inlet and a water through pipeline water outlet, the water through pipeline water inlet is connected with a water inlet pipe nozzle on the gasifier shell, and the water through pipeline water outlet is connected with a water outlet pipe nozzle on the gasifier shell. The coil pipe is internally cooled by water to play a role in protecting the burner, and the cylinder is used for connecting the burner water cooling cover and the gasification furnace shell.

Has the advantages that:

(1) the structure of the water-cooled wall internal part of the gasification furnace improves the safety and reliability of the gasification furnace, reduces the maintenance times, thereby improving the online running rate of the gasification furnace, saving the brick replacement cost and reducing the operation and maintenance cost;

(2) the membrane type water-cooled wall of the internal part structure of the water-cooled wall of the gasification furnace provided by the utility model adopts an integral tube array structure, the upper necking and the lower necking are made into cones in a tripping tube mode, the manufacturing is simple and convenient compared with the conventional coil type cone, a large number of small R elbows of 180 degrees and 90 degrees are omitted, the material cost and the manufacturing cost can be saved, meanwhile, the number of water pipelines is reduced, the flow resistance is reduced, and the reduction of energy consumption and the system safety are facilitated;

(3) the slag hole of the internal part structure of the water-cooled wall of the gasification furnace provided by the utility model adopts a refractory brick form, is effectively insulated and beneficial to slag discharge, and can be accurately matched with a radiation waste boiler (RSC) with a refractory brick channel adopted at an inlet, so that the components, the flow field and the temperature field of process gas at the inlet of the radiation waste boiler (RSC) meet the process requirements, and the process performance of the radiation waste boiler is ensured.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

Drawings

FIG. 1 is a schematic structural view of a gasifier water wall internals;

FIG. 2 is a schematic structural diagram of a single water pipe of a membrane water wall;

FIG. 3 is a schematic structural diagram of a burner water cooling cover;

FIG. 4 is a schematic structural view of a slag notch;

FIG. 5 is a schematic view of the internal structure of the slag notch.

The reference numbers are as follows: 1-an introduction tube; 2-a water inlet header; 3-membrane type water-cooled wall; 4-water outlet header; 5-a lead-out pipe; 6-burner water cooling cover; 6-1-water through pipe; 6-2-steel pipe; 6-3-water inlet of water pipeline; 6-4-water outlet of water pipeline; 7-slag hole; 7-1-cylinder wall; 7-2-refractory brick; 7-3-supporting and rotating plate; 8-a blower; 9-a balance tube; 10-a gasifier shell; 11-water pipe; 11-1-straight cylinder part; 11-2-upper throat; 11-3-lower necking; 11-4-upper interface portion; 11-5-lower interface portion; 12-burner mounting port.

Detailed Description

The utility model will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

Examples

As shown in fig. 1 to 5, in a preferred embodiment, a gasifier water-cooled wall internal part structure is provided, which comprises a group of inlet pipes 1 for inlet water, a group of inlet header tanks 2 for collecting and distributing inlet water, a group of membrane water-cooled walls 3 for forming a gasification chamber hearth, a group of outlet header tanks 4 for collecting outlet water, a group of outlet pipes 5 for outlet water, a group of burner water-cooled hoods 6 for protecting burners, a group of slag holes 7 for connecting a gasifier and a radiation waste boiler, a group of purgers 8 for introducing purge gas and protection gas, and a group of balance pipes 9 for balancing internal and external pressures of the hearth. The structure of the internal part of the water-cooled wall of the gasification furnace is a rotary cylinder type structure taking a central line as an axis.

The membrane water-cooling wall 3 is of a tube type cylindrical structure consisting of a plurality of water through tubes 11 and fins, a gasification chamber hearth is arranged inside the membrane water-cooling wall 3, and an upper necking and a lower necking are respectively arranged at two ends of the membrane water-cooling wall 3; the number of the water pipes 11 and the number of the fins are determined according to the size and the shape of the water cooling wall which is actually designed.

The water inlet header 2 is positioned at the bottom of the membrane water-cooled wall 3, and the water outlet header 4 is positioned at the top of the membrane water-cooled wall 3;

the inlet end of the introducing pipe 1 is connected with a water inlet pipe nozzle on a gasification furnace shell 10, the gasification furnace shell 10 is positioned on the outer side of the membrane water-cooled wall 3, and the outlet end of the introducing pipe 1 is connected with the water inlet header 2; two ends of each water through pipe 11 of the membrane type water-cooled wall 3 are respectively connected with the water inlet header 2 and the water outlet header 4, the inlet end of the eduction pipe 5 is connected with the water outlet header 4, and the outlet end of the eduction pipe 5 is connected with a water outlet pipe nozzle on the gasification furnace shell 10; the burner water cooling cover 6 is connected between the burner mounting opening 12 of the gasifier shell 10 and the upper necking of the membrane water wall 3 and is matched with the upper necking of the membrane water wall 3;

the slag hole 7 is a cylindrical channel, the slag hole 7 is connected between a lower necking of the membrane water-cooled wall 3 and an inlet of the radiation waste boiler, an upper interface of the slag hole 7 is matched with a lower necking of the membrane water-cooled wall 3, and a lower interface of the slag hole 7 is matched with an inlet of the radiation waste boiler.

The leading-in pipe 1 is connected to the water inlet header 2 from a water inlet pipe nozzle of the gasification furnace shell 10, supplies water for the membrane water-cooled wall 3, and simultaneously provides integral support for the internal part structure of the membrane water-cooled wall 3.

The membrane type water-cooled wall 3 is of a tube array type cylindrical structure consisting of a water service pipe 11 and fins, and the fin tubes mainly have the functions of increasing a heating surface or dissipating heat and improving heat transfer efficiency. A certain pitch is kept between the water service pipes 11, the upper necking of the membrane water-cooling wall 3 is matched with the burner water-cooling cover 6, the lower necking of the membrane water-cooling wall 3 is matched with the slag hole 7, the water service pipes at the necking sections jump according to the arrangement condition and the pitch requirement, and the jumping is that the water service pipes 11 jump out of the tube panel in the direction of forming the tube panel, because the pitch of the water service pipes 11 in the circumferential direction is gradually reduced after the cylindrical necking, and when the water service pipes 11 are not arranged, a part of the water service pipes 11 must jump out.

The water passing pipe 11 comprises a straight cylinder part 11-1, an upper necking part 11-2, a lower necking part 11-3, an upper connecting part 11-4 and a lower connecting part 11-5, wherein the straight cylinder part 11-1, the upper necking part 11-2 and the lower necking part 11-3 are all linear, the straight cylinder part 11-1 is vertically placed, two ends of the straight cylinder part 11-1 are respectively connected with the upper necking part 11-2 and the lower necking part 11-3 to form a trapezoidal structure without a lower bottom surface, the upper connecting part 11-4 is connected with the other end of the upper necking part 11-2, and the other end of the lower necking part 11-3 is connected with the lower connecting part 11-5.

The slag hole 7 is a cylindrical channel composed of a cylinder wall 7-1, a supporting and rotating plate 7-3 and refractory bricks 7-2, the cylinder wall 7-1 is positioned outside the slag hole 7, the supporting and rotating plate 7-3 and the refractory bricks 7-2 are positioned inside the cylinder wall 7-1, the supporting and rotating plate 7-3 comprises a supporting plate and a reinforcing rib plate, the supporting and rotating plate 7-3 is connected with the cylinder wall 7-1, and the refractory bricks 7-2 are laid on the supporting and rotating plate 7-3 and form the cylindrical channel in the cylinder wall 7-1.

The membrane type water-cooled gasifier comprises a membrane type water-cooled wall 3, a gasifier shell 10, a blower 8, a blowing gas inlet pipe mouth, a circular pipe structure and a baffle plate, wherein the blower 8 is located at the bottom of an annular space between the membrane type water-cooled wall 3 and the gasifier shell 10, the blower 8 is connected with the blowing gas inlet pipe mouth on the gasifier shell 10, the circular pipe is provided with uniformly distributed air inlets, and the outside of each air inlet is provided with the baffle plate.

And the sweeping gas and the protective gas are introduced into the sweeping device 8 to maintain the pressure balance inside and outside the hearth and sweep the fly ash between the hearth and the shell 10 of the gasification furnace.

The balance pipe 9 is positioned in a gap between the upper necking of the membrane water-cooled wall 3 and the burner water-cooled cover 6, and is communicated with a hearth of the gasification chamber and an annular space to play a role in balancing the pressure inside and outside the hearth.

And the heating surfaces of the membrane water-cooled wall 3 and the burner water-cooled cover 6 are coated with refractory linings for protecting the membrane water-cooled wall 3.

The water inlet header 2 and the water outlet header 4 are both of a ring pipe structure, and the water inlet header 2 is provided with a pipe nozzle connected with the lead-in pipe 1 and the lower connector 11-5 on the water through pipe 11; and the water outlet header 4 is provided with a nozzle connected with the outlet pipe 5 and the upper interface part 11-4 on the water through pipe 11. The upper connecting part 11-4 of the water passing pipe 11 is butt-welded with the nozzle on the water outlet header tank 4, and the lower connecting part 11-5 of the water passing pipe 11 is butt-welded with the nozzle on the water inlet header tank 2.

The inlet water collection tank 2 is located at the bottom of the membrane water-cooled wall 3, water is collected and then distributed to the water through pipes 11 of the membrane water-cooled wall 3, water in the water through pipes 11 of the membrane water-cooled wall 3 flows upwards from bottom to top, and the water enters the outlet water collection tank 4 after absorbing heat of a gasification side, and the outlet water collection tank 4 is located at the top of the membrane water-cooled wall 3 and collects outlet water.

The eduction tube 5 is in a spiral coiling structure.

The leading-out pipe 5 is connected to a water outlet pipe nozzle of the gasification furnace shell 10 from the water outlet header 4, leads out the saturated water vapor after heat absorption, is of a spiral winding structure, and can absorb the thermal expansion displacement difference between the water-cooled wall internal part and the gasification furnace shell 10.

The gasifier runs in a high-temperature state, the starting and stopping processes and the temperature fluctuation state, the temperature of the water-cooled wall internal part is different from that of the gasifier shell 10, the corresponding thermal expansion amount is different, and the thermal expansion amount difference value, namely the thermal expansion displacement difference exists between the water-cooled wall internal part and the gasifier shell.

The burner water cooling cover 6 is of a coil pipe structure consisting of a water through pipeline 6-1 and a cylinder 6-2, the cylinder 6-2 is positioned at the upper part of the water through pipeline 6-1, two ends of the water through pipeline 6-1 are respectively connected with a water inlet 6-3 of the water through pipeline and a water outlet 6-4 of the water through pipeline, the water inlet 6-3 of the water through pipeline is connected with a water inlet pipe nozzle on the gasification furnace shell 10, and the water outlet 6-4 of the water through pipeline is connected with a water outlet pipe nozzle on the gasification furnace shell 10.

The coil pipe is internally cooled by water, so that the burner is protected.

During installation, after the components are manufactured independently, the membrane type water-cooled wall 3, the water inlet header 2, the water outlet header 4, the inlet pipe 1, the outlet pipe 5 and the balance pipe 9 are assembled into a whole firstly and then are integrally installed in the gasification furnace shell 10, and the inlet pipe 1 and the outlet pipe 5 are respectively assembled and connected with the water inlet pipe nozzle and the water outlet pipe nozzle on the gasification furnace shell 10. The burner water cooling cover 6 is assembled with a burner mounting flange cover of the gasifier shell 10 and then assembled with the upper necking of the membrane water wall 3. The slag notch 7 is assembled with the lower necking of the membrane water wall 3. The purger 8 is assembled with a purge gas inlet nozzle on the gasifier shell 10.

When the gasification furnace operates, saturated water in the steam pocket enters the water inlet collecting tank 2 through the inlet pipe 1, the water inlet collecting tank 2 uniformly distributes the water to all the water through pipes 11 of the membrane type water-cooled wall 3, the saturated water absorbs heat of gasification reaction to form a steam-water mixture, the steam-water mixture is collected by the water outlet collecting tank 4 and is led out to the steam pocket through the outlet pipe 5, and a water circulation system is formed. The burner water cooling cover 6 and the membrane water cooling wall 3 are parallel water paths, so that water distribution adjustment can be realized, too little water supplied by the burner water cooling cover 6 is prevented from being burnt out, and the burner water cooling cover and the membrane water cooling wall are both in a water circulation system. The water-cooled wall is cooled and protected by circulating water, and a safe and reliable reaction space is provided for gasification. The slag hole 7 provides an effective heat-insulating channel for the synthesis gas, is beneficial to slag discharge and can ensure the process performance at the outlet of the gasification furnace. The blower 8 continuously provides protective gas and blowing gas for the water-cooled wall internal parts, and the balance pipe 9 is communicated with the hearth and the annular space, so that the internal and external pressure balance of the membrane water-cooled wall 3 is realized, and the reliable operation of the gasification furnace is ensured.

Claims

1. A gasifier water-cooled wall internal part structure is characterized by comprising an introducing pipe (1), a water inlet header (2), a membrane type water-cooled wall (3), a water outlet header (4), an outlet pipe (5), a burner water-cooled cover (6), a slag hole (7), a blower (8) and a balance pipe (9);

the membrane water-cooling wall (3) is of a tube array cylindrical structure consisting of a plurality of water through tubes (11) and fins, a gasification chamber hearth is arranged inside the membrane water-cooling wall (3), and an upper necking and a lower necking are respectively arranged at two ends of the membrane water-cooling wall (3);

the water inlet collecting tank (2) is positioned at the bottom of the membrane water-cooled wall (3), and the water outlet collecting tank (4) is positioned at the top of the membrane water-cooled wall (3);

the inlet end of the introducing pipe (1) is connected with a water inlet pipe nozzle on a gasification furnace shell (10), the gasification furnace shell (10) is positioned on the outer side of the membrane water-cooled wall (3), and the outlet end of the introducing pipe (1) is connected with the water inlet header (2); two ends of each water through pipe (11) of the membrane water-cooled wall (3) are respectively connected with the water inlet header (2) and the water outlet header (4), the inlet end of the outlet pipe (5) is connected with the water outlet header (4), and the outlet end of the outlet pipe (5) is connected with a water outlet pipe nozzle on the gasifier shell (10); the burner water cooling cover (6) is connected between a burner mounting opening (12) of the gasification furnace shell (10) and an upper necking of the membrane water wall (3) and is matched with the upper necking of the membrane water wall (3);

the slag hole (7) is a cylindrical channel, the slag hole (7) is connected between a lower necking of the membrane water-cooled wall (3) and an inlet of the radiation waste boiler, an upper interface of the slag hole (7) is matched with a lower necking of the membrane water-cooled wall (3), and a lower interface of the slag hole (7) is matched with an inlet of the radiation waste boiler.

2. A gasifier water wall internal member structure as claimed in claim 1, wherein said water passing pipe (11) comprises a straight cylinder portion (11-1), an upper throat portion (11-2), a lower throat portion (11-3), an upper interface portion (11-4) and a lower interface portion (11-5), said straight cylinder portion (11-1), said upper throat portion (11-2) and said lower throat portion (11-3) are all linear, said straight cylinder portion (11-1) is vertically disposed, both ends of said straight cylinder portion (11-1) are respectively connected with said upper throat portion (11-2) and said lower throat portion (11-3) to form a trapezoidal structure without a bottom surface, said upper interface portion (11-4) is connected with the other end of said upper throat portion (11-2), the other end of the lower necking part (11-3) is connected with the lower interface part (11-5).

3. The gasifier water-cooled wall internal part structure is characterized in that the slag hole (7) is a cylindrical channel formed by a cylinder wall (7-1), a supporting and rotating plate (7-3) and refractory bricks (7-2), the cylinder wall (7-1) is located outside the slag hole (7), the supporting and rotating plate (7-3) and the refractory bricks (7-2) are located inside the cylinder wall (7-1), the supporting and rotating plate (7-3) comprises a supporting plate and reinforcing rib plates, the supporting and rotating plate (7-3) is connected with the cylinder wall (7-1), and the refractory bricks (7-2) are laid on the supporting and rotating plate (7-3) and form a cylindrical channel in the cylinder wall (7-1).

4. The gasifier water wall internal member structure as claimed in claim 1, characterized in that the purger (8) is located at the bottom of the annular space between the membrane water wall (3) and the gasifier shell (10), the purger (8) is connected with a purging gas inlet nozzle on the gasifier shell (10), the purger (8) is a ring pipe structure, uniformly distributed gas inlet holes are formed on the ring pipe, and a baffle is arranged outside each gas inlet hole.

5. The gasifier water wall internal part structure as claimed in claim 4, characterized in that the balance pipe (9) is positioned in the gap between the upper necking of the membrane water wall (3) and the burner water cooling cover (6) and is communicated with the gasifier hearth and the annular space.

6. The gasifier water-cooled wall internal part structure as claimed in claim 1, characterized in that the heating surfaces of the membrane water-cooled wall (3) and the burner water-cooled cover (6) are coated with refractory lining.

7. The gasifier water-cooled wall internal part structure as claimed in claim 2, characterized in that the inlet header (2) and the outlet header (4) are both of a circular pipe structure, and the inlet header (2) is provided with a nozzle connected with the lower interface parts (11-5) on the inlet pipe (1) and the water through pipe (11); and the water outlet header (4) is provided with a nozzle connected with the outlet pipe (5) and the upper interface part (11-4) on the water through pipe (11).

8. The gasifier water wall internal member structure as claimed in claim 1, characterized in that the outlet pipe (5) is a spiral coiled structure.

9. The gasifier water-cooled wall internal part structure as claimed in claim 1, wherein the burner water-cooled cover (6) is a coil structure consisting of a water through pipe (6-1) and a cylinder (6-2), the cylinder (6-2) is positioned at the upper part of the water through pipe (6-1), two ends of the water through pipe (6-1) are respectively connected with a water through pipe water inlet (6-3) and a water through pipe water outlet (6-4), the water through pipe water inlet (6-3) is connected with a water inlet pipe nozzle on a gasifier shell (10), and the water through pipe water outlet (6-4) is connected with a water outlet pipe nozzle on the gasifier shell (10).