CN111947159A

CN111947159A - Cone disc type rotary grate of shoemaking waste incinerator

Info

Publication number: CN111947159A
Application number: CN201910404945.2A
Authority: CN
Inventors: 尤毅聪; 刘春平; 李明; 谢教忠; 陈江龙
Original assignee: Quanzhou Branch Fujian Boiler And Pressure Vessel Inspection Institute
Current assignee: Quanzhou Branch Fujian Boiler And Pressure Vessel Inspection Institute
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-11-17

Abstract

The invention discloses a conical disc type rotary grate of a shoemaking waste incinerator, which comprises: the device comprises a conical grate, a rotary table support frame, a support steel frame, an ash falling pipe, a sealing device and a rotating mechanism for driving the conical grate to rotate, wherein the rotating mechanism comprises a transmission shaft, a rotary table gear, a bearing and an air inlet system, and the air inlet system comprises an air inlet, an air supply bin and an air cap; one end of the transmission shaft is meshed with the turntable gear; a plurality of air inlet holes are uniformly distributed on the conical grate, and conical air caps are mounted on the air inlet holes. The conical disc type rotary grate has the advantages that fuel is uniformly distributed and suspended on the grate to be combusted, the combustion is uniform, and the burn-out rate is improved.

Description

Cone disc type rotary grate of shoemaking waste incinerator

Technical Field

The invention relates to the technical field of solid waste incinerators, in particular to a conical disc type rotary grate of a shoemaking waste incinerator.

Background

With the continuous acceleration of urban modernization process, the discharge amount of solid garbage wastes increases day by day, and the traditional garbage treatment method is easy to cause serious land and air pollution and is difficult to adapt to sustainable development. At present, solid garbage is mainly treated by incineration, which requires stable and continuous feeding and slag discharging of raw materials and convenient control. The heat value of the raw materials fed into the incinerator for waste incineration is higher and higher, so that high-temperature molten slag is easily formed while the incinerator temperature is increased, and the slag outlet of the incinerator is coked and hardened to influence the normal operation of the incinerator.

The rotary grate is used as a main part of the incinerator and mainly plays the following roles: the support function is realized, and the garbage materials are supported to be combusted, pyrolyzed, gasified and the like in the furnace; secondly, stirring and slag breaking functions, namely stirring and breaking large blocks of slag generated after complete combustion in the furnace and then discharging; thirdly, the slag discharging function is realized, and the slag burnt in the furnace and the crushed slag are discharged out of the furnace body.

The existing rotary fire grate has the following defects:

1. in the process of high-temperature incineration of the garbage, large-block coked materials are easy to generate, slag is broken only by extrusion of the fire grate, the slag breaking effect is poor, and the large-block coked materials are easy to block the fire grate or be clamped on a slag discharging hole, so that the problem of unsmooth slag discharging is caused; the fire grate has large rotation resistance, so that the fire grate is easy to block to burn out a motor or a speed reducer;

2. after combustion-supporting air is fed through the ash bin, combustion-supporting air is assisted from gaps between the grate slag discharge holes and the grates, and if large blocks of slag-bonding hard objects are blocked between the grates or clamped in the slag discharge holes, the combustion-supporting air and garbage combustion-supporting effect can be influenced;

3. the middle layer in the incinerator is easy to generate fault arch in the incineration process of the garbage incinerator.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide the conical disc type rotary grate of the shoemaking waste incinerator, which not only solves the problem of good crushing effect of large blocks of coked materials generated in the high-temperature incineration process of solid garbage, but also can smoothly discharge slag from crushed middle and small blocks of slag materials so as to fully mix combustion-supporting air and garbage.

This shoemaking waste material burns burning furnace's conical disk rotary grate includes: the device comprises a conical grate, a rotary table support frame, a support steel frame, an ash falling pipe, a sealing device and a rotating mechanism for driving the conical grate to rotate, wherein the rotating mechanism comprises a transmission shaft, a rotary table gear, a bearing and an air inlet system, and the air inlet system comprises an air inlet, an air supply bin and an air cap; one end of the transmission shaft is meshed with the turntable gear, a plurality of air port holes are uniformly distributed on the conical grate, and conical air caps are mounted on the air port holes.

Furthermore, the sealing device is composed of a sealing ring, a sealing element, refractory sand, a side plate and a sealing plate.

Furthermore, the ash falling pipe is arranged in the center of the conical grate.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. the rotary grate adopts a special blast cap to supply air, so that fuel leakage on the grate is prevented from entering an air chamber and blocking a bearing, and the blast cap can ensure that air distribution of the air chamber entering the surface of the grate is more uniform and forms vortex combustion.

2. The main purpose of the rotary grate is to uniformly distribute and suspend the fuel on the grate for burning.

3. The rotary grate rotates fuel flame to generate vortex combustion, so that the retention time of fuel volatile matters and fine particles in the furnace is prolonged, and the burn-out rate is improved.

4. When the fuel of the rotary grate of the structure is in grate firing, the burning rate of the boiler is the highest.

Drawings

FIG. 1 is a schematic view of a conical disk rotary grate;

fig. 2 is a top view of a conical disk rotary grate.

Detailed Description

The invention is further explained by combining the drawings and the embodiments.

The conical disc type rotary grate of the invention comprises: the device comprises a conical grate 7, a rotary table supporting frame 8, a supporting steel frame 10, an ash falling pipe 6, a sealing device 2 and a rotating mechanism for driving the conical grate 7 to rotate, wherein the rotating mechanism comprises a transmission shaft 1, a rotary table gear 3, a supporting bearing 4 and an air inlet system, and the air inlet system comprises an air inlet 11, an air supply bin 9 and an air cap 5; one end of the transmission shaft 1 is meshed with the turntable gear 3, a plurality of air port holes are uniformly distributed on the conical fire grate 7, and conical air caps 5 are mounted on the air port holes; further, the sealing device 2 is composed of a sealing ring, a sealing element, refractory sand, a side plate and a sealing plate; further, the ash falling pipe 6 is arranged at the center of the conical grate 7.

The blast cap enables the fuel flame to present vortex combustion through special design; the turntable gear drives the conical fire grate to rotate, and a supporting bearing is arranged below the conical fire grate to ensure that the conical fire grate can rotate stably.

When the rotary grate rotates, the transmission device drives the turntable gear to rotate the supporting bearing, so that the grate is in a rotating state; the shoe-making waste is taken as fuel and is sent into an incinerator through a screw feeder, firstly, the fuel absorbs heat by high-temperature radiation in the incinerator, so that the fuel is preheated to be critical to ignition, air quantity required by combustion is supplied by an air blower at the bottom of an incinerator seat, air enters an air inlet and reaches an air supply bin, and oxygen is uniformly supplied to a combustion chamber through a conical grate and an air cap; the fuel is in a suspension state by adjusting the air volume and the air pressure of the blower, and the combustion effect of the fuel in the suspension state is best; when the conical grate rotates, the fuel flame is in vortex combustion due to the special design of the blast cap, the fuel can be concentrated to the center of the combustion chamber due to the design of the conical disc, the temperature of the combustion chamber is as uniform as possible, and ash residues which are burnt out are promoted to fall from the center into the central ash falling pipe. And finally, most of the burned slag falls into the slag falling pipe, and the other part of the burned slag is sucked and discharged out of the furnace by the induced draft fan.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A conical disk rotary grate of a shoemaking waste incinerator is characterized by comprising: the device comprises a conical grate (7), a rotary table support frame (8), a support steel frame (10), an ash falling pipe (6), a sealing device (2) and a rotating mechanism for driving the conical grate (7) to rotate, wherein the rotating mechanism comprises a transmission shaft (1), a rotary table gear (3), a bearing (4) and an air inlet system, and the air inlet system comprises an air inlet (11), an air supply bin (9) and an air cap (5);

wherein one end of the transmission shaft (1) is meshed with the turntable gear (3); a plurality of air inlet holes are uniformly distributed on the conical grate (7), and conical air caps (5) are arranged on the air inlet holes.

2. The conical disk type rotary grate of a shoemaking waste incinerator according to claim 1, wherein: the sealing device (2) is composed of a sealing ring, a sealing element, refractory sand, a side plate and a sealing plate.

3. The conical disk type rotary grate of a shoemaking waste incinerator according to claim 2, wherein: the ash falling pipe (6) is arranged in the center of the conical grate (7).