WO2013010377A1

WO2013010377A1 - Compound-combustion boiler

Info

Publication number: WO2013010377A1
Application number: PCT/CN2012/000944
Authority: WO
Inventors: 李仕清
Original assignee: Li Shiqing
Priority date: 2011-07-18
Filing date: 2012-07-09
Publication date: 2013-01-24
Also published as: CN102353038A; CN102353038B

Abstract

A compound-combustion boiler has at least one boiler (31) and at least one auxiliary furnace chamber (24) having directional combustion-supporting air-cooled rotary grate bars (40). Post-combustion slag is discharged from the boiler (31) onto the grate bars (40) of the auxiliary furnace chamber (24) for combustion, said grate bars (40) being provided at the bottom of the auxiliary furnace chamber (24). The outer ends of the grate bars (40) are equipped with slagging boards or slagging teeth (5). A return smoke chamber (41) is provided below the grate bars (40). A return smoke fan (23) is provided outside the return smoke chamber (41). The smoke discharged from the boiler passes through the return smoke fan (23) and then recycles back into the return smoke chamber (41) at the bottom of the auxiliary furnace chamber (24) where the smoke mixes with air. The smoke is subjected to a second combustion cycle at a high temperature in the auxiliary furnace chamber, is desulfurized and dedusted, and then is released into the atmosphere.

Description

Composite burning pot

Technical field:

The present invention relates to a composite combustion boiler for use in steam production and hot water production in industrial production and civil heating.

Background technique:

At present, all boilers are used in single furnaces and grate technology. In use, the flue gas is still unable to perform the basic secondary combustion. Some boilers have added dust removal, sulfur removal devices, and exhaust fumes. There are still a large number of flammable gases and particles, which cause environmental pollution, waste resources, and increase production costs. The emitted flue gas must be handled by special equipment, so the efficiency is very low, environmental pollution, and waste of resources are very serious.

Summary of the invention:

The present invention has been made in view of the above problems, in order to provide a novel composite combustion boiler, which can re-enter the flue gas dust after primary combustion into the composite furnace, and use the composite furnace heat and high temperature to perform secondary combustion after desulfurization. Non-polluting emissions, especially the world's problem of non-polluting emissions from waste incineration power generation.

In order to achieve the above object, the present invention adopts the following technical solutions:

A composite combustion boiler composite furnace is provided with an assembled slag discharge plate or a slag discharge directional combustion-supporting air-cooled rotary grate, comprising a rotary grate, a combined slag discharge plate or a slag discharge tooth, and a rotary electric machine, characterized in that The composite combustion boiler relates to a composite furnace with at least one directional combustion-supporting air-cooled rotary grate provided at a slag discharge port of various boilers, or a directional combustion-supported air-cooled rotary grate with an assembled slag discharge plate or slag discharge teeth Composite furnace, or composite furnace with assembled slag discharge plate or slag-discharged rotary grate, assembled slag discharge plate or slag discharge tooth, combined slag discharge plate disposed between both ends of the same rotary grate The slag discharge tooth is combined with the slag discharge plate or the slag discharge tooth of the whole piece structure or a plurality of segment structures on the rotary grate, and at least one side of the composite furnace has a coarse slag discharge port, and the slag discharged from the boiler enters the composite furnace raft. The soot discharged from the boiler enters the returning chamber of the lower part of the rotating grate in the composite furnace through the returning fan, and the slag discharging port is arranged in the lower part of the returning chamber. The fan pump with air inlet outside the composite furnace is mixed with the air and the air in the composite furnace. After rotating the grate for secondary combustion, it is discharged into the magnified gas after desulfurization and dedusting.

A composite combustion boiler composite furnace is provided with an assembled slag discharge plate or a slag discharge directional combustion-supporting air-cooled rotary grate, comprising a rotary grate, a slag discharge plate or a slag discharge tooth, an orientation concave plate, a rotary electric machine, The utility model is characterized in that: the rotating grate is provided with an assembled slag discharge plate or a slag discharge tooth, and the assembled slag discharge plate or the slag discharge tooth is combined with the slag discharge plate or the slag discharge on the same side of the same rotating grate The tooth is a whole structure or a plurality of segmented slag discharge plates or slag discharge teeth combined on the same rotating grate, and a plurality of rotating grate bars are connected by a transmission device and driven by a motor.

A composite combustion boiler composite furnace is provided with an assembled slag discharge plate or a slag discharge directional combustion-supporting air-cooled rotary grate, comprising a rotary grate, a slag discharge plate or a slag discharge tooth, an orientation concave plate, a rotary electric machine, The utility model is characterized in that: the rotating grate is provided with an assembled slag discharge plate or a slag discharge tooth, and the assembled slag discharge plate or the slag discharge tooth is combined with the slag discharge plate or the slag discharge on the same side of the same rotating grate The tooth is a whole structure or a plurality of segmented slag discharge plates or slag discharge teeth combined on the same rotating grate, and the rotating grate is hollow and has a fan The rotating grate has a hole communicating with the outside, and at least one rotating grate is connected with a fan at an outer end thereof, and a plurality of rotating grate are connected by a transmission device and driven by a motor.

A composite combustion boiler composite furnace is provided with an assembled slag discharge plate or a slag discharge directional combustion-supporting air-cooled rotary grate, comprising a rotary grate, a slag discharge plate or a slag discharge tooth, an orientation concave plate, a rotary electric machine, The utility model is characterized in that: the rotating grate is provided with an assembled slag discharge plate or a slag discharge tooth, and the assembled slag discharge plate or the slag discharge tooth is combined with the slag discharge plate or the slag discharge on the same side of the same rotating grate The tooth is a whole structure or a plurality of segmented slag discharge plates or slag discharge teeth combined on the same rotating grate, the rotary grate is hollow and has a fan connected thereto, and the rotary grate has a hole communicating with the outside, The inner side of the rotating grate is provided with an orientation concave plate, and the orientation concave plate opening is always facing the furnace. At least one rotating furnace bar is connected with a fan at an outer end thereof, and a plurality of rotating grate bars are connected with a transmission device and driven by a motor.

A composite combustion boiler composite furnace is provided with an assembled slag discharge plate or a slag discharge directional combustion-supporting air-cooled rotary grate, comprising a rotary grate, an orientation concave plate, and a rotary electric machine, wherein the rotary grate is hollow There is a fan connected thereto, the rotating grate has a hole communicating with the outside, the inner side of the rotating grate is provided with an orientation concave plate, the oriented concave plate opening is always facing the furnace, and at least one rotating grate is connected with a fan at the outer end, several There is a transmission connection between the rotating grate and a motor to rotate.

Preferably, the composite furnace of the composite combustion boiler has a plenum on the inside of the composite furnace, a refractory material on the inside of the composite furnace, a blasting port on the refractory material, or a fan on the outside of the composite furnace to communicate with the composite hearth furnace.

Preferably, the outer end of the rotating grate of the composite grate housing of the composite combustion boiler has a coarse slag discharge port. Preferably, the upper part of the rotating grate of the composite furnace of the composite combustion boiler has a heat collecting device.

Preferably, the composite combustion boiler is composed of at least one or more boilers and at least one or more composite furnaces, the boiler and the composite furnace are connected by a flue gas duct, at least one or more smoke control valves and at least one or more fans At least one or more flashback chambers are connected together, and at least one set of rotating grate bars in each composite furnace.

Preferably, the composite combustion boiler of the composite combustion boiler is composed of at least one or more boilers and at least one or more composite furnaces, the boiler and the composite furnace are connected by a flue gas duct, at least one or more smoke control valves and at least one Or a plurality of fans, at least one or more of the return hoods being connected together, and at least one set of rotating grate bars in each of the composite furnaces.

Preferably, the composite combustion boiler has a wind chamber around the composite furnace, and the inside of the composite furnace has a refractory material, and a blower is arranged thereon, and a fan outside the composite furnace is connected to the wind chamber.

Preferably, the composite combustion boiler, the ventilating device may adopt a combined three-way reversing valve, or each composite furnace external exhaust pipe is connected with at least one recirculation valve at the same time, and one exhaust valve is controlled.

Preferably, in the composite combustion boiler, the bottom of the composite furnace has a wheel driven by the rotating device on the guide rail. Preferably, the composite combustion boiler, the rotary grate can also use a directional combustion-supporting air-cooled rotary grate: a motor, a blast furnace shell with a directional concave plate, one external fan, and the other side through the transmission There is a motor to drive the rotation, and the road conditions are connected by a linkage device.

Preferably, the combined slag discharge plate or the slag discharge tooth of the rotary grate of the composite furnace is provided with a vent hole. Preferably, the composite furnace of the composite combustion boiler has a built-in dust screen inside the observation window.

Preferably, there is a fuel delivery device above the composite furnace of the composite combustion boiler.

Preferably, the boiler and the composite furnace of the composite combustion boiler are integrally provided and a plurality of combinations of each of the boilers are respectively provided with at least one vertical composite furnace, and the plurality of boilers are randomly arranged and connected via the ventilation device.

Preferably, the composite furnace has a refractory material on the side of the wind chamber, and the composite furnace and the refractory material have holes facing the composite furnace, and the composite furnace vent chamber is connected to the inlet fan.

Preferably, the reversing means changes the recirculation or discharge of flue gas from two or more composite furnaces by switching or switching of a plurality of valves.

Preferably, there is a slagging device below the composite furnace.

Preferably, the set of boiler systems can be arbitrarily arranged by a number of boilers.

Beneficial effects ·

A composite furnace having at least one rotating road strip or a directional combustion air-cooled rotary grate provided at the slag discharge port of the boiler, or a directional combustion-supporting air-cooled rotary grate having an assembled slag discharge plate or a slag discharge tooth Composite furnace, or composite furnace with rotating slag plate with assembled slag discharge plate or slag discharge, combined slag discharge plate or row of slag discharge plates or slag discharge teeth disposed between the two ends of the same rotary grate The slag teeth are combined on the rotating grate with a whole piece structure or a plurality of segmented slag discharge plates or slag discharge teeth, and at least one side of the composite grate has a coarse slag discharge port, and the slag discharged from the boiler enters the composite furnace, the boiler The discharged soot enters the returning chamber of the lower part of the rotating grate in the composite furnace through the returning fan, and the slag discharging port is arranged in the lower part of the returning chamber, and the fan pump with air inlet outside the composite furnace, the smoke and the air are mixed in the composite furnace The rotating grate is subjected to secondary combustion and then discharged into the atmosphere after desulfurization and dedusting, which not only improves the utilization rate of fuel, but also solves the world problem of environmental pollution caused by waste incineration.

BRIEF DESCRIPTION OF THE DRAWINGS:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side cross-sectional view of a composite combustion boiler according to a first embodiment of the present invention;

Figure 2 is a side cross-sectional view showing a composite combustion boiler according to a second embodiment of the present invention;

Figure 3 is a side elevational cross-sectional view of the composite furnace of the third embodiment of the present invention;

Figure 4 is a front elevational cross-sectional view of a composite furnace according to a fourth embodiment of the present invention;

Figure 5 is a side cross-sectional view of a rotary grate according to a fifth embodiment of the present invention;

detailed description:

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a composite combustion boiler of the present invention will be described in detail with reference to the accompanying drawings. In Embodiments 1-5, a boiler and a composite furnace are mainly provided, and a rotary slag in a composite furnace is provided with an assembled slag discharge. Plate or slag discharge; 2The rotary grate is provided with an assembled slag discharge plate or a slag discharge tooth, the rotary grate is hollow and has a fan connected thereto, and the rotary grate has a hole communicating with the outside; 3 rotating the grate is set Group The slag discharge plate or the slag discharge tooth is arranged, the rotary grate is connected to the hollow fan, the rotary grate has a hole communicating with the outside, and the inner side of the rotary grate is provided with the directional concave plate, and the directional concave plate opening is always facing the furnace The example is explained.

Embodiment 1 :

A composite combustion boiler according to a first embodiment of the present invention, as shown in Fig. 1, comprises a boiler 31, a composite furnace 24, which feeds fuel through a charging device 28 to a grate 30 in a boiler combustion chamber 29 for combustion, and then through a box type. The collector 27 produces hot water or steam, and the burned slag is discharged from the boiler 31 through the grate 30 to the rotary grate 40 of the composite furnace 24 for combustion, and then the hot water or steam is produced by the box collector 26, the boiler. The smoke discharged during the combustion of the fuel in the 31 is introduced into the return chamber 41 of the composite furnace 24 through the return air blower 42 and mixed with the air blown by the blower through the air inlet 43 and passed through the rotary grate 40. The slag having a higher furnace temperature is subjected to secondary combustion, and the exhaust gas after the secondary combustion is discharged into the atmosphere by desulfurization and dust removal, and the slag is discharged to the slagging device 21 through the coarse slag discharge port 34 of the composite furnace 24 to be discharged.

According to the above-mentioned structure soot, the fuel and the once-burned soot exhaust gas are subjected to secondary combustion in the high-temperature slag of the composite furnace 24, and the exhaust gas discharged after the two combustions has no combustible gas and particles, and the three-dimensional composite furnace fuel is more Thick and coke-like, the furnace temperature is very high, far exceeding the temperature required for the decomposition of dioxins, thus eliminating environmental pollution, saving energy, and reducing greenhouse gas emissions.

Embodiment 2:

A composite combustion boiler according to a first embodiment of the present invention, as shown in Fig. 1, includes a boiler 31, a composite furnace 24, which feeds fuel through a charging device 28 to a grate 30 in a boiler combustion chamber 29 for combustion, and then a tubular set. The heat exchanger 33 produces hot water or steam, and the burned slag is discharged from the boiler 31 through the grate 30 into the rotary grate 40 of the composite furnace 24 for combustion, and then the hot water or steam is produced by the tubular collector 32, in the boiler 31. The smoke discharged during the combustion of the fuel is introduced into the returning chamber 41 of the composite furnace 24 via the return air blower 23, and is returned to the air blown by the blower through the helium port 43 and passed through the rotating grate 40 in a higher furnace. The secondary slag is subjected to secondary combustion, and the exhaust gas after the secondary combustion is discharged into the atmosphere by desulfurization and dust removal, and the slag is discharged to the slagging device 21 through the coarse slag discharge port 34 of the composite furnace 24 to be discharged.

Embodiment 3:

As shown in FIG. 3, the composite combustion boiler according to the third embodiment of the present invention comprises a composite furnace 24, a transmission motor 35, a transmission unit 36, a coarse slag discharge port 34, and a slagging device 21, and the slag is further burned in the composite furnace 24 The transmission motor 35 drives the transmission device 36 to rotate, thereby rotating the rotating grate to discharge the slag out of the composite furnace 24, wherein the smaller slag directly falls from the gap between the rotating grate, and the larger slag is rotated to the coarse through the rotating grate The slag discharge port 34 is discharged to the slag discharge device 21 for discharge.

According to the above structure, due to the limited space between the rotating grate bars, large slag cannot be obtained from the rotating grate The gap between the gaps is reduced, and the large slag slag is prevented from forming a clogging in the composite furnace 24 by opening the coarse slag discharge port 34. Embodiment 4:

As shown in FIGS. 4-5, the directional combustion air-cooled rotary grate of the fourth embodiment of the present invention includes a rotary grate shell 19, a motor 12, a fan 13, and a transmission device 11 fan pump 14, below the furnace 1 The rotary grate shell 19 has a assembled slag discharge plate or slag discharge teeth 5 disposed on the tooth holder 39 of the rotary grate shell 19, and the rotary grate shell 19 has a hole and a grate chamber 6 communicating, the shaft end of the rotating grate shell 19 is coupled to the motor 12 via the transmission device 11, and a plurality of rotating grate shells 19 are connected by a linkage device, the shaft end is coupled to the casing via a bushing or bearing 9, and the inner side has a seal The small plenum of the cover 10 has a duct communicating with the plenum 2 of the furnace 1, and the other ends of the other end of the rotary slat shell 19 are coupled to the central shaft 18 via two bushings or bearings 7 and 17, and the outer section has a sealing cover 16 The central shaft 18 has a hole on the outer side through the pipe 15, communicates with the furnace plenum chamber 2, and the outer end is coupled with the motor 13, the fan 14, and the central shaft 18 is fixed to the inner shaft at the inner or outer side of the rotary grate shell 19 Oriented concave plate 8, the mouth is facing the furnace 1, and the inside of the furnace is resistant Material 20, the furnace 1 has a transparent observation window 3 on one side of the casing, a built-in dust screen 4, a smoke return chamber 22 at the bottom of the furnace, a smoke return hole 23 on the smoke return chamber 22, and a coarse slag hole on at least one side of the furnace 1 twenty one.

According to the above structure, since the opening of the directional concave plate 8 always faces the direction of the furnace, it contributes to the combustion of the fuel in the furnace, and at the same time, the effect of lowering the temperature of the rotating blast furnace shell 19 extends the service life and prevents the sinter shell from being Deformation, the rotation of the motor 12 is rotated by the transmission device 11 to rotate the rotating grate shell 19, and there is a sleeve or bearings 7 and 17 between the rotating grate shell 19 and the center shaft 18, so that the center shaft 18 and the directional concave plate 8 can be fixed and not rotated. Under the action of the fan 13 and the pump 14, the furnace blast chamber 2 of the furnace 1 and the furnace plenum 6 of the rotary kiln shell 19 are filled with a certain pressure of air and blown into the furnace 1 through holes or slots, thereby enhancing the combustion effect. By providing an assembled slag discharge plate or slag discharge teeth 5 on the rotating grate shell 19, the service life of the rotary grate shell 19 can be effectively improved, the cost can be reduced, the maintenance cost can be reduced, the rotary ash can be increased, and the boiler can be burned in three dimensions. It becomes feasible, and the furnace temperature in the three-dimensional combustion furnace 1 can effectively decompose the non-combustible toxic gas such as dioxins, thereby enabling waste incineration power generation to achieve pollution-free discharge.

Although the above description has been made by taking a combination of a boiler 31 and a composite furnace 24 as an example, the present invention may also be provided with a plurality of boilers or a plurality of composite furnaces, and the rotary furnace strips are further provided with an assembly type on one rotating furnace strip. Slag discharge plate or slag discharge tooth, a plurality of rotating furnace bars are connected by a transmission device and driven by a motor; 2 rotating furnace bar is provided with an assembled slag discharge plate or a slag discharge tooth, and the rotary grate is hollow with a fan and In the same way, the rotating grate has a hole communicating with the outside, at least one rotating grate is connected with a fan at the outer end, a plurality of rotating grate is connected with a transmission device and the motor is driven to rotate; 3 the rotating grate is provided with an assembled type The slag discharge plate or the slag discharge tooth, the rotary grate is hollow and has a fan connected thereto, the rotary grate has a hole communicating with the outside, the inner side of the rotary grate is provided with an orientation concave plate, and the orientation concave plate opening is always facing the furnace, at least A rotating fan is connected to a fan at an outer end thereof, and a plurality of rotating bars are connected by a transmission device and driven by a motor. A variety of different rotating grate bars are placed in the composite furnace to set them up.

The above described preferred embodiments are illustrative and not restrictive, and the invention may be embodied and embodied in other ways without departing from the spirit and scope of the invention. Various modifications are intended to be included within the scope of the invention.

Claims

A composite combustion boiler comprising at least one boiler and at least one composite furnace provided with a directional combustion-supporting air-cooled rotary grate, or an assembled slag discharge plate or a slag discharge directional combustion-supporting air-cooled rotary grate, The utility model is characterized in that the composite combustion boiler relates to a composite furnace provided with at least one directional combustion-supporting air-cooled rotary grate at a slag discharge port of various boilers, or a directional combustion-supporting air-cooled rotation with an assembled slag discharge plate or a slag discharge tooth Composite furnace of grate, or composite grate of rotating grate with assembled slag discharge plate or slag discharge, combined slag discharge or slag discharge combined slag placement between both ends of the same rotary grate The plate or the slag-discharging teeth are combined on the rotating grate with a whole piece structure or a plurality of segmented slag discharge plates or slag discharge teeth, and at least one side of the composite furnace has a coarse slag discharge port, and the slag discharged from the boiler enters the composite In the furnace, the smoke discharged from the boiler enters the returning chamber of the lower part of the rotating furnace in the composite furnace through the returning fan, and the slag discharging port is arranged in the lower part of the returning chamber. The fan pump with air inlet outside the composite furnace is mixed with the air. Together through the rotating grate furnace secondary combustion air and then discharged by the addition of sulfur dust.

2. A composite combustion boiler comprising at least one boiler and at least one composite furnace with a directional combustion-supporting air-cooled rotary grate provided with an assembled slag discharge plate or a slag discharge tooth, and a rotary electric machine characterized in that the rotary grate The assembled slag discharge plate or the slag discharge tooth is arranged, and the assembled slag discharge plate or the slag discharge tooth is combined with the slag discharge plate or the slag discharge tooth at the same side of the same rotating grate, and the whole slag structure is Or a plurality of segmented slag discharge plates or slag discharge teeth are combined on the same rotating grate, and a plurality of rotating grate bars are connected by a transmission device and driven by a motor.

3 . A composite combustion boiler comprising at least one boiler and at least one composite furnace with a directional combustion-supporting air-cooled rotary grate provided with an assembled slag discharge plate or a slag discharge tooth, a rotary electric machine, characterized in that the rotary grate is The assembled slag discharge plate or the slag discharge tooth, the assembled slag discharge plate or the slag discharge tooth in the same rotating grate, the slag discharge plate or the slag discharge tooth combined between the two ends of the same side is the whole structure or A plurality of segmented slag discharge plates or slag discharge teeth are combined on the same rotating grate, and the rotary grate is hollow at least one end communicated with the fan through the hollow, and the hollow rotary grate has a hole communicating with the outside, at least A rotating fan is connected to the outer end of the rotating furnace, and a plurality of rotating bars are connected by a transmission device and driven by a motor.

A composite combustion boiler comprising at least one boiler and at least one composite furnace, directional concave plate, rotating electric machine, which is provided with an assembled slag discharge plate or a slag discharge tooth, and is characterized in that The rotating grate is provided with an assembled slag discharge plate or a slag discharge tooth, and the assembled slag discharge plate or the slag discharge tooth is combined with the slag discharge plate or the slag discharge tooth at the same side of the same rotating grate. The whole structure or a plurality of segmented structure slag discharge plates or slag discharge teeth are combined on the same rotary grate, and the rotary grate is hollow at least one end communicated with the fan through the fan, and the hollow rotary grate has holes and external portions. In the same way, the inner side of the rotating grate is provided with a directional concave plate, and the directional concave plate opening is always facing the furnace. At least one rotating furnace bar is connected with a fan at an outer end thereof, and a plurality of rotating sinters are connected with a transmission device and driven by a motor.

5. A composite combustion boiler comprising at least one boiler and at least one composite furnace provided with a rotating grate, a rotating electrical machine, characterized in that the rotating grate is at least one end of the hollow through which the fan is connected, the hollow rotating grate The hole has a hole communicating with the outside, the inner side of the rotating grate is provided with an orientation concave plate, the orientation concave plate opening is always facing the furnace, at least one rotating furnace bar is connected with a fan at an outer end thereof, and a plurality of rotating grate are connected with a transmission device and There is a motor to drive the rotation.

6. The composite combustion boiler according to any one of claims 1 to 5, characterized in that the composite furnace casing has a plenum, the inside of the composite furnace has a refractory material, the refractory material has a venting opening, or the composite furnace has a fan outside. The composite grate bars are connected.

A composite combustion boiler according to any one of claims 1 to 5, characterized in that the rotary grate of the composite grate housing has a coarse slag discharge port at the outer end.

A composite combustion boiler according to any one of claims 1 to 5, characterized in that the upper portion of the rotating grate of the composite furnace has a heat collecting means.

9. The composite combustion boiler according to any one of claims 1 to 5, wherein the composite combustion boiler is composed of at least one or more boilers and at least one or more composite furnaces, and the boiler and the composite furnace are connected by a flue gas pipeline. At least one or more smoke control valves and at least one or more fans, at least one or more flashback chambers coupled together, at least one set of rotating grate bars within each composite furnace.

The composite combustion boiler according to any one of claims 1 to 5, characterized in that the combined slag discharge plate or the slag discharge tooth of the rotary grate of the composite furnace is provided with a vent hole.