CN212108409U

CN212108409U - Rice husk incinerator capable of continuously producing white carbon black

Info

Publication number: CN212108409U
Application number: CN202020374405.2U
Authority: CN
Inventors: 李�荣; 黄术翠; 黄慧静
Original assignee: Zhejiang Weiming Environment Protection Co ltd
Current assignee: Wenzhou Yongqiang Waste Power Generation Co.,Ltd.
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2020-12-08
Anticipated expiration: 2030-03-23

Abstract

The utility model discloses a rice husk incinerator capable of continuously producing white carbon black, relating to the extraction of amorphous hydrated SiO by rice husk ash₂The technical field of the (white carbon black) comprises a water-cooling feeding hole, a blanking hole, a beam grate, a steel frame and a guard plate. The guard plates comprise a front arch guard plate, a rear wall guard plate and two side wall guard plates of the incinerator. The water-cooled feedingThe opening is arranged in front of the furnace, and the blanking opening is arranged behind the furnace. The steel frame supports and is welded on the supporting seat of the beam grate, and the guard plate supports and is welded on the supporting seat of the beam grate and the steel frame. The utility model adopts the self-combustion of the raw materials from the combustion, thereby improving the heat efficiency and saving the production cost; secondly, the rice hull ash is cooled outside the furnace, so that the furnace body is protected, the activity of the white carbon black in the rice hull ash is protected, and the quality of the raw materials is ensured; moreover, the adopted fire grate has high automation degree, so the industrial popularization is strong.

Description

Rice husk incinerator capable of continuously producing white carbon black

Technical Field

The utility model relates to an amorphous hydrated SiO is extracted to utilization rice hull ash₂(white carbon black) technical field, in particular to a rice hull incinerator capable of continuously producing white carbon black.

Background

The rice is the first large grain crop in China, and the rice hull yield accounts for about 20% of the total grain yield, so the rice hull resource is very rich. The rice hulls contain 16-20% (mass fraction) of amorphous hydrated silicon dioxide, and the content of other impurities is very low, so that the rice hulls are a valuable resource. However, although the rice hull ash has great economic value, how to prepare a large amount of low-temperature high-activity rice hull ash is a difficult problem.

Some projects research uses rice hull ash generated after rice hull incineration power generation as a raw material for extracting white carbon black, and most of amorphous hydrated SiO can be prepared only by carrying out temperature-controlled combustion on the rice hulls at the temperature of below 600 DEG C₂The (white carbon black) can be preserved in an amorphous state and is easily converted into low-activity crystalline SiO at the temperature of over 800 DEG C₂The value is low.

At present, two processing methods for obtaining qualified rice hull ash are mainly used, one is an indirect heating method, and an external heating method is adopted for heating a kiln or a sleeve, so that the method has the problems of high fuel consumption, low thermal efficiency and high cost, and the popularization is restricted; the other method is a direct combustion method, but adopts a fixed grate surface, water is sprayed in the furnace for cooling, continuous feeding in a strict sense cannot be realized, the damage to the furnace body is large, and the industrial production is difficult. Therefore, how to obtain a universal furnace body, the operation is simple, and the incineration device capable of being industrially produced becomes an industrial problem.

SUMMERY OF THE UTILITY MODEL

In view of the above, the utility model discloses from two aspects, firstly adopt the direct combustion method, utilize the high calorific value of rice husk, inflammable characteristic adopts the combustor automatic ignition that ignites. When the temperature in the furnace reaches about 600 ℃, gradually adjusting the air intake of the grate to ensure that the rice hulls are burnt in an anoxic state; secondly, the cross beam fire grate is adopted, the mechanization of feeding and discharging is completed, the air quantity is controlled from the lower air chamber of the furnace, the adjustability is strong, the ventilation is ensured, the air control is uniform, and the rice husk ash is recycled from the water-cooling discharging machine when the rice husk ash is in an off-white state.

In order to achieve the above object, the utility model adopts the following technical scheme: the device is characterized by comprising a water-cooling feeding hole, a blanking hole, a beam grate, a steel frame and a guard plate. The guard plates comprise a front arch guard plate, a rear wall guard plate and two side wall guard plates of the incinerator. The water-cooling feed inlet is arranged in front of the furnace, and the blanking port is arranged behind the furnace. The steel frame supports and is welded on the supporting seat of the beam grate, and the guard plate supports and is welded on the supporting seat of the beam grate and the steel frame.

Furthermore, a circulating cooling water tank is arranged around the water-cooling feed inlet.

Furthermore, the lower part of the blanking port is connected with a water-cooling discharging machine.

Furthermore, angle steel and a claw nail are welded in the front arch guard plate, the rear wall guard plate and the two side wall guard plates, a mullite castable layer and a light heat-insulating castable layer are poured, and an aluminum silicate fiberboard is laid on the outer side of the mullite castable layer and the light heat-insulating castable layer to form the heat-insulating furnace wall of the incinerator.

Furthermore, the mullite casting material layer is provided with an expansion gap, and a ceramic fiber blanket is filled in the expansion gap for sealing.

Furthermore, an outlet flue of flue gas is connected to the front arch guard plate, the front arch constructed by the front arch guard plate has an inclination angle of 2-5 degrees, and the length of the front arch accounts for 2/5 of the effective combustion length of the cross beam fire grate.

Furthermore, the inclination angle of a rear arch constructed by the rear arch guard plate is 2-5 degrees, and the length of the rear arch guard plate accounts for 3/5 of the effective combustion length of the cross beam fire grate.

Furthermore, an ignition burner is arranged on the rear wall guard plate.

The utility model has the advantages as follows:

1. the incinerator adopts a rice hull direct combustion method, after the combustor is ignited, the rice hull is combusted to raise the temperature in the incinerator to about 600 ℃, the air intake of the grate is adjusted, and the rice hulls in the incinerator are controlled to be in an incomplete combustion state. The heat utilization rate is improved, and the cost of using other fuels is saved.

2. The incinerator adopts the cross beam grate, and has the advantages of uniform ventilation gap distribution, good ventilation performance and capability of avoiding the conditions of nonuniform ventilation and over-burning or insufficient burning of local rice hulls. And the cross beam fire grate belongs to one of chain fire grates, and realizes continuous mechanized feeding and discharging.

3. Because the rice hulls are inflammable materials, the rice hulls are extremely easy to burn when being fed along with the increase of the temperature of smoke in the furnace, and therefore, a circulating cooling water tank is arranged at the feeding port, the feeding port is protected, and the operation is safe.

4. The rice husk ash is quickly cooled by a water-cooling discharging machine after being discharged, thereby not only protecting the furnace body, but also protecting SiO in the rice husk ash₂The activity of the white carbon black is not damaged, and the quality of the white carbon black is ensured.

5. The incinerator is connected with a flue gas outlet flue, and the flue gas quantity in the incinerator can be used for heating water to be used as a drying heat source for subsequent white carbon black extraction; or the waste heat boiler is introduced to carry out secondary combustion, and the heat is improved to be used for steam power generation and the like.

Drawings

Fig. 1 is a schematic front view of the present invention;

fig. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic view and an enlarged view of the furnace wall structure of the present invention;

the reference numerals in the drawings mean: 1-a water-cooled feeding port, 2-a blanking port, 3-a beam grate, 4-a steel frame and 5-a front arch guard plate; 6-rear arch guard board, 7-rear wall guard board, 8-two side wall guard boards, 9-circulating cooling water tank, 10-water cooling discharging machine, 11-angle steel, 12-grabbing nail, 13-mullite casting material layer, 14-light heat insulation casting material layer, 15-aluminum silicate fiber board, 16-expansion gap, 17-ceramic fiber blanket, 18-outlet flue and 19-ignition burner.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in the figures 1-2, the utility model discloses a but rice husk of continuous production white carbon black burns burning furnace, including water-cooling feed inlet 1, blanking mouth 2, crossbeam grate 3, steelframe 4 and backplate, the backplate contains the preceding backplate 5 that encircles, encircles backplate 6, back wall backplate 7 and both sides wall backplate 8 that burns burning furnace. The water-cooling feed inlet 1 is arranged in front of the furnace, and the blanking port 2 is arranged behind the furnace. The steel frame 4 is supported and welded on the supporting seat of the beam grate 3, and the guard plate is supported and welded on the supporting seat of the beam grate 3 and the steel frame 4.

And circulating cooling water tanks 9 are arranged around the water-cooling feed inlet 1.

The lower part of the blanking port 2 is connected with a water-cooling discharging machine 10.

The front arch guard plate 5, the rear arch guard plate 6, the rear wall guard plate 7 and the two side wall guard plates 8 are internally welded with angle steel 11 and a grab nail 12 and are poured to form a mullite castable layer 13 and a light heat-insulating castable layer 14, and an aluminum silicate fiberboard 15 is laid on the outer side to form the heat-insulating furnace wall of the incinerator.

The mullite castable layer is provided with an expansion gap 16, and a ceramic fiber blanket 17 is filled in the expansion gap 16 for sealing.

The front arch guard plate 5 is connected with a flue gas outlet 18, the front arch guard plate 5 is used for constructing a front arch with an inclination angle of 2-5 degrees, and the length of the front arch guard plate accounts for 2/5 of the effective combustion length of the cross beam fire grate 3.

The inclination angle of a rear arch constructed by the rear arch guard plate 6 is 2-5 degrees, and the length of the rear arch guard plate accounts for 3/5 of the effective combustion length of the cross beam fire grate 3.

An ignition burner 19 is arranged on the rear wall guard plate 8.

Claims

1. The utility model provides a but rice husk of continuous production white carbon black burns burning furnace, includes water-cooling feed inlet (1), blanking mouth (2), crossbeam grate (3), steelframe (4) and backplate, its characterized in that: the protective plates comprise a front arch protective plate (5), a rear arch protective plate (6), a rear wall protective plate (7) and two side wall protective plates (8), the water-cooling feed port (1) is arranged in front of the furnace, the blanking port (2) is arranged behind the furnace, the steel frame (4) is supported and welded on a supporting seat of the cross beam grate (3), and the protective plates are supported and welded on the supporting seat of the cross beam grate (3) and the steel frame (4).

2. The rice husk incinerator for continuously producing white carbon black according to claim 1, wherein a circulating cooling water tank (9) is provided around said water-cooled feed inlet (1).

3. The incinerator for rice husk capable of continuously producing white carbon black according to claim 1, wherein the lower part of said blanking port (2) is connected to a water-cooled discharging machine (10).

4. The rice husk incinerator for continuously producing white carbon black according to claim 1, wherein the front arch guard (5), the rear arch guard (6), the rear wall guard (7) and the two side wall guards (8) are welded with angle steel (11) and nails (12), cast to form a mullite castable layer (13) and a light heat insulation castable layer (14), and laid with an aluminum silicate fiber board (15) on the outer side to form the heat insulation furnace wall of the incinerator.

5. The incinerator for rice husk capable of continuously producing silica white according to claim 4, wherein said mullite castable layer (13) is provided with expansion gaps (16), and ceramic fiber blankets (17) are filled in the expansion gaps (16) for sealing.

6. The rice husk incinerator capable of continuously producing white carbon black according to claim 1, wherein the front arch guard plate (5) is connected with a flue gas outlet (18), the front arch guard plate (5) is constructed to form a front arch with an inclination angle of 2-5 degrees, and the length of the front arch guard plate accounts for 2/5 of the effective combustion length of the cross beam grate (3).

7. The rice husk incinerator capable of continuously producing white carbon black according to claim 1, wherein the inclination angle of the rear arch constructed by the rear arch guard plate (6) is 2-5 degrees, and the length of the rear arch guard plate accounts for 3/5 of the effective combustion length of the cross beam grate (3).

8. The rice husk incinerator for continuously producing white carbon black according to claim 1, wherein said rear wall guard (7) is provided with an ignition burner (19).