CN210398889U

CN210398889U - Double-layer combustion chamber boiler

Info

Publication number: CN210398889U
Application number: CN201920985617.1U
Authority: CN
Inventors: 陈喜春
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-04-24
Anticipated expiration: 2029-06-27

Abstract

The utility model relates to a boiler field specifically is a double combustion chamber boiler. The inner side of the furnace body shell is provided with a furnace liner to form a furnace body, the upper part of one side in the furnace liner is provided with an upper layer gasification combustion chamber, the lower part of one side in the furnace liner is provided with a lower layer combustion chamber, and the upper layer gasification combustion chamber and the lower layer combustion chamber are mutually communicated to form a double-layer combustion chamber; the upper part of the upper layer gasification combustion chamber is provided with a heating pipe, and the upper part of the upper layer gasification combustion chamber is communicated with the upper part of one side of the process chamber. The utility model discloses arrange preceding porous grate, well porous grate, back porous grate according to the three-layer stairstepping, combine grate burning pusher, burning pay-off push-and-pull door and push-and-pull door air feed hole down, realize the layering and the whole combustion-supporting of giving wind through giving the wind gap. The utility model discloses be suitable for fuel, living beings compression fuel, timber leftover bits and pieces, saw dust, rice husk, peanut shell, cow dung or coal etc. and combine together through fuel burning, gasification burning, fuel can reach the effect of gasification burning after make full use of.

Description

Double-layer combustion chamber boiler

Technical Field

The utility model relates to a boiler field specifically is a double combustion chamber boiler.

Background

The biomass boiler is a kind of boiler, namely a boiler using biomass energy as fuel is called a biomass boiler and is divided into a biomass steam boiler, a biomass hot water boiler, a biomass hot air furnace, a biomass heat-conducting oil furnace, a vertical biomass boiler, a horizontal biomass boiler and the like.

The boiler uses a reciprocating grate, which is the most suitable combustion equipment for biomass fuel combustion. The boiler is in structural design, and the space is great relatively traditional boiler furnace, arranges very reasonable overgrate air simultaneously, and the abundant burning of a large amount of volatiles that precipitate in the twinkling of an eye when being favorable to biomass fuel to burn. Compared with the traditional boiler, the boiler has higher efficiency and low exhaust gas temperature. The biomass boiler is characterized in that: energy-saving, environment-friendly and convenient to install and use.

The fuel is fed into the hearth by the screw feeder, and is gradually preheated, dried, ignited and combusted under the action of high-temperature flue gas and primary air, a large amount of volatile matters are separated out in the process, and the combustion is violent. The generated high-temperature flue gas scours the main heating surface of the boiler, enters a coal economizer and an air preheater of the heating surface at the tail part of the boiler, then enters a dust remover, and finally is discharged into the atmosphere through a chimney. The un-gasified fuel moves towards the rear part of the fire grate until the fuel is burnt out, and finally, a small amount of residual ash falls into a slag removing opening at the rear part of the fire grate.

The ash generated by the biomass fuel accounts for about 1.5% of the fuel, and the efficiency of the biomass boiler is generally over 80% and reaches 88.3% at the highest. Nevertheless, the energy-saving and environment-friendly effects are relatively poor, the combustion temperature is low, the dust emission is serious and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a double-deck combustion chamber boiler, it is poor to solve the energy-concerving and environment-protective effect that exists among the prior art, uses biomass fuel combustion temperature low, the serious scheduling problem of dust emission.

The technical scheme of the utility model is that:

a double-layer combustion chamber boiler is characterized in that a furnace pipe is arranged on the inner side of a furnace body shell to form a furnace body, an upper layer gasification combustion chamber is arranged at the upper part of one side in the furnace pipe, a lower layer combustion chamber is arranged at the lower part of one side in the furnace pipe, and the upper layer gasification combustion chamber and the lower layer combustion chamber are communicated with each other to form a double-layer combustion chamber; the upper part of the upper layer gasification combustion chamber is provided with a heating pipe, and the upper part of the upper layer gasification combustion chamber is communicated with the upper part of one side of the process chamber.

The double-layer combustion chamber boiler is characterized in that a multi-hole grate, a lower-layer water jacket partition plate, a combustion chamber gasification combustion-supporting hole and a lower-layer gasification chamber are arranged in the combustion chamber, the multi-hole grate is of a three-layer stepped arrangement structure of a front multi-hole grate, a middle multi-hole grate and a rear multi-hole grate, and each multi-hole grate is gradually lowered and obliquely arranged according to the sequence of the front multi-hole grate, the middle multi-hole grate and the rear multi-hole grate; the two sides of the multi-hole grate are relatively provided with a lower water jacket clapboard in parallel, and the lower water jacket clapboard is provided with a combustion chamber gasification combustion-supporting hole; the top of the space between the outer sides of the two lower water jacket clapboards and the furnace pipe is provided with a lower air supply chamber cover plate to form a lower gasification chamber, and the lower gasification chamber is communicated with the upper part of the porous fire grate through a combustion chamber gasification combustion-supporting hole.

The upper gasification combustion chamber of the double-layer combustion chamber boiler comprises a tubular grate, an upper water jacket partition plate, gasification combustion-supporting holes and a gasification air supply chamber, wherein the upper water jacket partition plate is arranged on two sides of the tubular grate in parallel relatively, and the gasification combustion-supporting holes are arranged on the upper water jacket partition plate; an upper cover plate is arranged at the top of a space between the outer sides of the two upper water jacket partition plates and the furnace pipe to form a gasification air supply chamber, and the gasification air supply chamber and the upper cover plate are used as an upper combustion chamber gasification system; the gasification air supply chamber is communicated with the upper part of the tubular grate through the gasification combustion-supporting hole, and the lower part of the bottom opening of the gasification air supply chamber and the lower part of the tubular grate correspond to the upper part of the combustion chamber.

The double-layer combustion chamber boiler is characterized in that a draught fan and a dust remover are arranged on one side outside the boiler body, and a storage bin, a hopper, a feeder, a grate combustion pusher, a fan and an air box are arranged on the other side outside the boiler body from top to bottom.

The double-layer combustion chamber boiler is characterized in that the upper part of the outer side of the process chamber is communicated with an induced draft fan, a dust remover is installed on the lower part of the induced draft fan, and a chimney opening is installed on the upper part of the dust remover.

The double-layer combustion chamber boiler is characterized in that the bottom of a bin is communicated with a hopper, the lower part of the hopper extends to the upper part of a lower-layer combustion chamber in a boiler body through a discharge port, a feeder is arranged at the discharge port of the hopper, a grate combustion pusher extends into the boiler body through an upper push rod and a lower push rod which are arranged in parallel and penetrate through two openings in the side wall of the boiler body, the two push rods respectively correspond to fuels on a front porous grate and a middle porous grate of the lower-layer combustion chamber, a combustion and feeding upper push-pull door is arranged at one end of each push rod corresponding to the fuel on the front porous grate, air supply holes of the push-pull door are uniformly formed in the combustion and feeding upper push-pull door, a combustion and feeding lower push-pull door is arranged at one; the air outlet of the fan is communicated with an air box, the air box cover is buckled at two openings on the side wall of the furnace body and the outer side of the air supply opening, the air box is communicated with the upper part of the front porous grate through an air supply hole of a sliding door, the air supply opening is communicated with the lower part of the porous grate, the air supply opening is communicated with the upper part of the middle porous grate through an air supply hole of the sliding door on a push-and-pull door for combustion and feeding, and the air supply opening is communicated with the upper part of the porous grate through a combustion chamber gasification combustion-supporting hole on a lower.

The double-layer combustion chamber boiler is characterized in that a lower-layer combustion chamber gasification system is formed by a fan, an air box, an air supply opening, a lower-layer gasification chamber, a lower air supply chamber cover plate and an air supply hole of a sliding door, and the upper part of the lower-layer combustion chamber gasification system is communicated with an upper-layer combustion chamber gasification system formed by a gasification air supply chamber and an upper cover plate in an upper-layer gasification combustion chamber to form a gasification combustion-supporting part.

In the double-layer combustion chamber boiler, the upper part of the other side in the furnace pipe is provided with a process chamber, the process chamber is internally provided with process chamber water jacket clapboards in parallel along the vertical direction in a staggered manner to form a reciprocating advancing type smoke and fire channel, and the outlet of the smoke and fire channel is positioned at the upper part of the other side of the process chamber; the lower part of the other side in the furnace pipe is provided with an ash chamber which corresponds to an ash outlet of the lower combustion chamber.

The utility model has the advantages and beneficial effects that:

1. the utility model discloses double-deck combustion chamber boiler combines together upper gasification combustion chamber, lower floor's combustion chamber, compares with coal gasification boiler, and the furnace temperature is the same, and the fuel burn-off rate is hundred per cent, fuel saving, and energy utilization is high.

2. The utility model discloses double-deck combustion chamber boiler arranges porous grate in the front, well porous grate, the porous grate in back according to the three-layer stairstepping, combines grate burning pusher, burning pay-off push-and-pull door and push-and-pull door air feed hole down, realizes layering and whole air feed combustion-supporting through the air feed mouth. In addition, the lower part of the gasification system of the upper combustion chamber is communicated with the gasification system of the lower combustion chamber to form a gasification combustion-supporting part. The utility model discloses be suitable for fuel, living beings compression fuel, timber leftover bits and pieces, saw dust, rice husk, peanut shell, cow dung or coal etc. and combine together through fuel burning, gasification burning, fuel can reach the effect of gasification burning after make full use of.

Drawings

Fig. 1-3 are schematic structural views of the double-layer combustion chamber boiler of the present invention. Wherein FIG. 1 is an interior front view;

FIG. 2 is an interior side view; fig. 3 is a top view of the interior.

In the figure, 1 a furnace body shell; 2, a furnace pipe; 3, heating a pipe; 4, a stock bin; 5, a hopper; 6, burning, feeding and mounting an upper sliding door; 7, a feeder; 8 fire grate combustion pusher; 9, a fan; 10 gasifying the air supply chamber; 11, a furnace door I; a 12-tube grate; 13, a second furnace door; 14 an upper gasification combustion chamber; 15 gasification combustion-supporting holes; 16 an upper water jacket partition; 17, an upper cover plate; 18 windboxes; 19 air supply ports; 20 front porous grate; 21, a sliding door is pushed down during combustion and feeding; 22 a perforated grate; 23, a third furnace door; 24 combustion chamber gasification combustion-supporting holes; 25 rear porous grate; 26 a lower water jacket partition; 27 a fourth furnace door; 28 water inlet; 29 furnace door five; 30, a dust remover; 31 induced draft fan; 32 a chimney port; 33 water outlet; 34 a process chamber; 35 a dust removing door; 36 process chamber water jacket partition; 37 an exhaust port; 38 ash chamber; 39 a push rod; 40 a lower layer gasification chamber; 41 lower combustion chamber; 42 lower air supply chamber cover plate; 43 sliding door air supply hole.

Detailed Description

As shown in fig. 1-3, the double-layer combustion chamber boiler of the present invention mainly comprises: a furnace body shell 1, a furnace pipe 2, a heating pipe 3, a storage bin 4, a hopper 5, a combustion feeding upper sliding door 6, a feeder 7, a grate combustion pusher 8, a fan 9, a gasification air supply chamber 10, a furnace door I11, a tubular furnace grate 12, a furnace door II 13, an upper gasification combustion chamber 14, a gasification combustion-supporting hole 15, an upper water jacket clapboard 16, an upper cover plate 17, a wind box 18, an air supply opening 19, a front porous furnace grate 20, a combustion feeding lower sliding door 21, a middle porous furnace grate 22, a furnace door III 23, a combustion chamber gasification combustion-supporting hole 24, a rear porous furnace grate 25, a lower water jacket clapboard 26, a furnace door IV 27, a water inlet 28, a furnace door V29, a dust remover 30, an induced draft fan 31, a chimney opening 32, a water outlet 33, a flow chamber 34, an ash cleaning door 35, a flow chamber water jacket clapboard 36, an air outlet 37, an ash residue chamber 38, a push rod 39, a lower gasification chamber 40, a lower combustion chamber, the concrete structure is as follows:

the furnace body is formed by arranging a furnace pipe 2 at the inner side of a furnace body shell 1 to form a furnace body, an upper layer gasification combustion chamber 14 is arranged at the upper part of one side in the furnace pipe 2, a lower layer combustion chamber 41 is arranged at the lower part of one side in the furnace pipe 2, a flow chamber 34 is arranged at the upper part of the other side in the furnace pipe 2, an ash chamber 38 is arranged at the lower part of the other side in the furnace pipe 2, the ash chamber 38 corresponds to an ash outlet of the lower layer combustion chamber 41, and the upper layer gasification combustion chamber 14 and the lower layer combustion chamber 41 are communicated with each other; the heating pipe 3 is arranged above the upper layer gasification combustion chamber 14, the upper part of the upper layer gasification combustion chamber 14 is communicated with the upper part of one side of the process chamber 34, the process chamber water jacket partition plates 36 are vertically and parallelly arranged in the process chamber 34 in a staggered mode to form a reciprocating advancing type smoke and fire channel, and the outlet of the smoke and fire channel is positioned on the upper part of the other side of the process chamber 34.

The combustion chamber 41 is internally provided with a multi-hole grate (a front multi-hole grate 20, a middle multi-hole grate 22 and a rear multi-hole grate 25), a lower water jacket partition 26, a combustion chamber gasification combustion-supporting hole 24 and a lower gasification chamber 40, wherein the front multi-hole grate 20, the middle multi-hole grate 22 and the rear multi-hole grate 25 are arranged in a three-layer stepped manner, and each multi-hole grate is gradually lowered and obliquely arranged according to the sequence of the front multi-hole grate 20, the middle multi-hole grate 22 and the rear multi-hole grate 25. The two sides of the multi-hole grate are oppositely and parallelly provided with a lower water jacket clapboard 26, and the lower water jacket clapboard 26 is provided with a combustion chamber gasification combustion-supporting hole 24. The top of the space between the outer sides of the two lower water jacket clapboards 26 and the furnace pipe 2 is provided with a lower air supply chamber cover plate 42 to form a lower gasification chamber 40, and the lower gasification chamber 40 is communicated with the upper part of the multi-hole grate through the combustion chamber gasification combustion-supporting holes 24.

The upper-layer gasification combustion chamber 14 comprises a tubular grate 12, an upper-layer water jacket partition 16, gasification combustion-supporting holes 15 and a gasification air supply chamber 10, wherein the upper-layer water jacket partition 16 is arranged on two sides of the tubular grate 12 in parallel relatively, and the gasification combustion-supporting holes 15 are arranged on the upper-layer water jacket partition 16. An upper cover plate 17 is arranged at the top of a space between the outer sides of the two upper water jacket partition plates 16 and the furnace pipe 2 to form a gasification air supply chamber 10, the gasification air supply chamber 10 is communicated with the upper part of the tubular grate 12 through a gasification combustion-supporting hole 15, and the lower part of the bottom opening of the gasification air supply chamber 10 and the lower part of the tubular grate 12 correspond to the upper part of the combustion chamber 41.

An induced draft fan 31 and a dust remover 30 are arranged on one side outside the furnace body, the upper part of the outer side of the process chamber 34 is communicated with the induced draft fan 31, the dust remover 30 is arranged on the lower part of the induced draft fan 31, and a chimney opening 32 is arranged on the upper part of the dust remover 30. A bin 4, a hopper 5, a feeder 7, a grate combustion pusher 8, a fan 9 and an air box 18 are arranged on the other side outside the furnace body from top to bottom, the bottom of the bin 4 is communicated with the hopper 5, the lower part of the hopper 5 extends to the upper part of a lower-layer combustion chamber 41 in the furnace body through a discharge hole, the feeder 7 is arranged at the discharge hole of the hopper 5, the grate combustion pusher 8 extends into the furnace body through two openings on the side wall of the furnace body through an upper push rod 39 and a lower push rod 39 which are arranged in parallel, the two push rods 39 respectively correspond to fuels on a front porous grate 20 and a middle porous grate 22 of a porous grate in the lower-layer combustion chamber 41, a combustion and feeding upper push-pull door 6 is arranged at one end of the push rods 39 corresponding to the fuels on the front porous grate 20, air supply holes 43 of the push-pull door are uniformly arranged, the push-pull door 21 is also uniformly provided with push-pull door air supply holes during combustion feeding. The air outlet of the blower 9 is communicated with an air box 18, the air box 18 covers and buckles two openings on the side wall of the furnace body and the outer side of an air supply opening 19, the air box 18 is communicated with the upper part of the front porous grate 20 through an air supply hole 43 of a sliding door, the air supply opening 19 is communicated with the lower part of the porous grate, the air supply opening 19 is communicated with the upper part of the middle porous grate 22 through an air supply hole of a sliding door on a push-and-pull door 21 for combustion feeding and downward pushing, and the air supply opening 19 is communicated with the upper part of the porous grate through a lower gasification chamber 40 and a combustion chamber gasification combustion-supporting hole.

The fan 9, the wind box 18, the wind supply opening 19, the lower-layer gasification chamber 40, the lower wind supply chamber cover plate 42 and the sliding door wind supply hole 43 form a lower-layer combustion chamber gasification system, and the gasification wind supply chamber 10 and the upper cover plate 17 form an upper-layer combustion chamber gasification system. The lower part of the gasification system of the upper combustion chamber is communicated with the gasification system of the lower combustion chamber to form a gasification combustion-supporting part.

The lower part of the side surface of the upper-layer gasification combustion chamber 14 is provided with a first furnace door 11, the first furnace door 11 corresponds to the lower part of the tubular grate 12 in the upper-layer gasification combustion chamber 14, the upper part of the side surface of the upper-layer gasification combustion chamber 14 is provided with a second furnace door 13, and the second furnace door 13 corresponds to the upper part of the tubular grate 12 in the upper-layer gasification combustion chamber 14. The lower part of the side surface of the lower combustion chamber 41 is provided with a third furnace door 23, the side surface of the ash chamber 38 is provided with a fourth furnace door 27, and the lower part of the side surface of the process chamber 34 is provided with a fifth furnace door 29. An exhaust port 37 is arranged on the top of the furnace body above the upper gasification combustion chamber 14, and an ash removal door 35 is arranged on the top of the furnace body above the process chamber 34. The upper part of the outer side of the flow chamber 34 is provided with a water outlet 33, the lower part of the outer side of the flow chamber 34 is provided with a water inlet 28, and the water inlet 28 and the water outlet 33 are communicated with the heating pipe 3 and the tubular grate 12 through pipelines.

As shown in fig. 1-3, the working process of the present invention is as follows:

(I) lower layer combustion

The method comprises the following steps that fuel enters a feeder 7 from a bin 4 through a stub bar 5, the fuel is fed into a lower-layer combustion chamber 41 from the feeder 7 and is stacked at one end of a front porous grate 20, the fuel is ignited through an ignition rod after being fed for 2-3 minutes, a fan 9 and an induced draft fan 31 are started while being ignited, after the ignition is completed, a grate combustion pusher 8 is started at regular time according to the combustion working condition, the fuel is enabled to flow and combust on the porous grates (the front porous grate 20, the middle porous grate 22 and the rear porous grate 25), and the fuel falls into an ash residue chamber 38 after being combusted.

(II) gasification combustion-supporting

Starting the fan 9 to enable air to enter the air box 18, distributing the air to the combustion feeding upper sliding door 6 through the air box 18, enabling one path of air to enter the upper part of the front porous grate 20 through an air supply hole 43 of the sliding door on the combustion feeding upper sliding door 6, and forming front air supply and combustion supporting; the other path of air enters the lower part of the multi-hole grate (a front multi-hole grate 20, a middle multi-hole grate 22 and a rear multi-hole grate 25) through an air supply opening 19 to supply air and support combustion, and air enters the upper part of the middle multi-hole grate 22 through a sliding door air supply hole on a push-pull door 21 during combustion feeding to form middle air supply and support combustion; air below the multi-hole grate passes through the lower water jacket partition 26, simultaneously enters the lower gasification chambers 40 at two sides, is distributed to the gasification combustion-supporting holes 24 of the combustion chambers, and enters the upper part of the multi-hole grate to form gasification combustion-supporting of the lower combustion chamber 41.

(III) gasification combustion of the upper layer

After fuel is added into the upper gasification combustion chamber 14 by the second furnace door 13 and ignited, smoke generated by the lower combustion chamber gasification system by supplying air to the lower combustion chamber 41 passes through the upper tubular grate 12 and the two side gasification air supply chambers 10 and is distributed to the gasification combustion-supporting holes 15, and enters the upper gasification combustion chamber 14 to form gasification combustion of the upper gasification combustion chamber 14. The flue gas after the gasification combustion in the upper gasification combustion chamber 14 is subjected to heat radiation on the heating pipe 3, enters the flow chamber 34, enters the dust remover 30 through the induced draft fan 31 for purification, and is discharged outside through the chimney port 32.

Claims

1. A double-layer combustion chamber boiler is characterized in that a furnace pipe is arranged on the inner side of a furnace body shell to form a furnace body, an upper layer gasification combustion chamber is arranged on the upper portion of one side in the furnace pipe, a lower layer combustion chamber is arranged on the lower portion of one side in the furnace pipe, and the upper layer gasification combustion chamber and the lower layer combustion chamber are communicated with each other to form a double-layer combustion chamber; the upper part of the upper layer gasification combustion chamber is provided with a heating pipe, and the upper part of the upper layer gasification combustion chamber is communicated with the upper part of one side of the process chamber.

2. The double-layer combustion chamber boiler according to claim 1, characterized in that a multi-hole grate, a lower water jacket clapboard, a combustion chamber gasification combustion-supporting hole and a lower gasification chamber are arranged in the combustion chamber, the multi-hole grate is a three-layer step-shaped arrangement structure of a front multi-hole grate, a middle multi-hole grate and a rear multi-hole grate, and each multi-hole grate is gradually lowered and obliquely arranged according to the sequence of the front multi-hole grate, the middle multi-hole grate and the rear multi-hole grate; the two sides of the multi-hole grate are relatively provided with a lower water jacket clapboard in parallel, and the lower water jacket clapboard is provided with a combustion chamber gasification combustion-supporting hole; the top of the space between the outer sides of the two lower water jacket clapboards and the furnace pipe is provided with a lower air supply chamber cover plate to form a lower gasification chamber, and the lower gasification chamber is communicated with the upper part of the porous fire grate through a combustion chamber gasification combustion-supporting hole.

3. The double-layer combustion chamber boiler according to claim 1, wherein the upper gasification combustion chamber comprises a tubular grate, an upper water jacket partition, gasification combustion-supporting holes and a gasification air supply chamber, wherein the upper water jacket partition is arranged on two sides of the tubular grate in parallel relatively, and the gasification combustion-supporting holes are arranged on the upper water jacket partition; an upper cover plate is arranged at the top of a space between the outer sides of the two upper water jacket partition plates and the furnace pipe to form a gasification air supply chamber, and the gasification air supply chamber and the upper cover plate are used as an upper combustion chamber gasification system; the gasification air supply chamber is communicated with the upper part of the tubular grate through the gasification combustion-supporting hole, and the lower part of the bottom opening of the gasification air supply chamber and the lower part of the tubular grate correspond to the upper part of the combustion chamber.

4. The double-layer combustion chamber boiler according to claim 1, wherein an induced draft fan and a dust remover are arranged on one side outside the boiler body, and a storage bin, a hopper, a feeder, a grate combustion pusher, a fan and an air box are arranged on the other side outside the boiler body from top to bottom.

5. The double-layer combustion chamber boiler according to claim 4, wherein the upper part of the outer side of the process chamber is communicated with an induced draft fan, the lower part of the induced draft fan is provided with a dust remover, and the upper part of the dust remover is provided with a chimney opening.

6. The double-layer combustion chamber boiler according to claim 4, characterized in that the bottom of the storage bin is communicated with a hopper, the lower part of the hopper extends to the upper part of the lower-layer combustion chamber in the boiler body through a discharge port, a feeder is arranged at the discharge port of the hopper, a grate combustion pusher extends into the boiler body through two openings on the side wall of the boiler body by an upper push rod and a lower push rod which are arranged in parallel, the two push rods respectively correspond to the fuel on a front porous grate and a middle porous grate of the lower-layer combustion chamber, an upper combustion and feeding push-pull door is arranged at one end of the push rod corresponding to the fuel on the front porous grate, air supply holes of the push-pull door are uniformly formed in the upper combustion and feeding push-pull door, a lower combustion and feeding push-pull door is arranged at one end of the push; the air outlet of the fan is communicated with an air box, the air box cover is buckled at two openings on the side wall of the furnace body and the outer side of the air supply opening, the air box is communicated with the upper part of the front porous grate through an air supply hole of a sliding door, the air supply opening is communicated with the lower part of the porous grate, the air supply opening is communicated with the upper part of the middle porous grate through an air supply hole of the sliding door on a push-and-pull door for combustion and feeding, and the air supply opening is communicated with the upper part of the porous grate through a combustion chamber gasification combustion-supporting hole on a lower.

7. The double-layer combustion chamber boiler according to claim 6, wherein the lower layer combustion chamber gasification system is formed by a fan, a wind box, a wind supply opening, a lower layer gasification chamber, a lower wind supply chamber cover plate and a sliding door wind supply hole, and the upper part of the lower layer combustion chamber gasification system is communicated with the upper layer combustion chamber gasification system formed by the gasification wind supply chamber and the upper cover plate in the upper layer gasification combustion chamber to form a gasification combustion supporting part.

8. The double-layer combustion chamber boiler according to claim 1, wherein a process chamber is arranged at the upper part of the other side in the furnace, process chamber water jacket clapboards are arranged in parallel in the process chamber along the vertical direction in a staggered manner to form a reciprocating advancing type smoke and fire channel, and an outlet of the smoke and fire channel is positioned at the upper part of the other side of the process chamber; the lower part of the other side in the furnace pipe is provided with an ash chamber which corresponds to an ash outlet of the lower combustion chamber.