CN111589335A

CN111589335A - Sludge anti-blocking conveying system

Info

Publication number: CN111589335A
Application number: CN202010481012.6A
Authority: CN
Inventors: 廖艳芬; 夏雨晴; 李德波; 马晓茜; 冯永新; 廖宏楷
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2020-05-30
Filing date: 2020-05-30
Publication date: 2020-08-28

Abstract

The invention discloses a sludge anti-clogging conveying system, which is used for conveying dried sludge into a coal-fired boiler for incineration and power generation, and comprises a sludge hopper, a spiral conveyor, a sludge drying all-in-one machine, a sludge bin, a discharger and a plurality of belts; the sludge hopper is connected with the screw conveyer, the screw conveyer is connected with the sludge drying all-in-one machine through a belt, the sludge drying all-in-one machine is connected with the discharger through a belt, the discharger sends sludge into the sludge bin, and the sludge bin is connected with the bidirectional screw conveyer through the discharge pipe side by side.

Description

Sludge anti-blocking conveying system

Technical Field

The invention relates to a conveying system, in particular to a sludge anti-blocking conveying system.

Background

At present, with the progress of society, the population and economy are continuously increased, the total energy consumption of China is increased day by day, so that the problems of energy and environment are more and more serious, and the national standard for environmental emission is more and more strict. Therefore, a large amount of sewage generated in the papermaking process is dried in the papermaking industry, then the dried sludge is sent to a boiler for incineration power generation, the dried sludge (the water content is about 40%) and coal are uniformly mixed according to the ratio of 1: 5-1: 10 in a dry coal shed, then the mixture is sent to a boiler coal bunker through a conveying system, and then the mixture is sent to a boiler hearth through a coal feeder adjusted by frequency conversion for combustion power generation, so that a large amount of labor and material cost is saved.

However, with the increase of the operation time, the moisture content is increased due to the fact that the sludge absorbs moisture in the air, coal and sludge are not uniformly mixed, moisture of the fire coal is increased, and the like, so that the coal in the coal bunker is stuck on the wall and agglomerated. Make the coal that the coal bunker flows few, most coal all stops in the coal bunker, and the accumulation time overlength leads to the high temperature to arouse long-pending coal spontaneous combustion, cause very big potential safety hazard for production, and the feeder coal breakage is frequent, causes very big economic loss to production, also greatly increased staff's the amount of labour simultaneously.

In the prior art, the utility model with the patent number of CN205442076U discloses a sludge conveying system for conveying sludge after drying treatment to a boiler for incineration power generation. However, the invention does not solve the problem that the sludge absorbs moisture in the air and gets damp again in the transportation process, and the potential safety hazard that the accumulated coal is spontaneously combusted due to the fact that the sludge is adhered to the wall and agglomerated in the coal bunker. According to the invention, the sludge conveying system is optimized, and the sludge drying all-in-one machine is added, so that the sludge is prevented from getting damp. The sludge bin with double-layer tanks is adopted, a layer of special plastic plate is lined on the inner wall of the sludge bin, and a loosening machine is arranged on the surface of the special plastic plate, so that the conditions that sludge is adhered to the wall and blocks a coal storage port can be greatly reduced.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention adopts a sludge bin structure with a double-layer tank, a layer of plastic plate is lined on the inner wall of the sludge bin, and a loosening machine is arranged on the surface of the plastic plate. The loosening machine can realize alarming and automatic operation when coal is blocked, thereby greatly reducing the conditions that coal powder is stuck to the wall and blocks the coal outlet.

The invention is realized by at least one of the following technical schemes.

A sludge anti-clogging conveying system is used for conveying dried sludge into a coal-fired boiler for incineration and power generation, and comprises a sludge hopper, a spiral conveyor, a sludge drying all-in-one machine, a sludge bin, a discharger and a plurality of belts; the sludge bucket with screw conveyer connects, screw conveyer pass through the belt with the sludge drying all-in-one is connected, the sludge drying all-in-one pass through the belt with the tripper is connected, the tripper sends into mud in the sludge warehouse, the sludge warehouse passes through the discharging pipe and is connected with two-way screw conveyer side by side, be equipped with the bulking machine in the sludge warehouse.

Furthermore, be provided with a plurality of discharging pipe on the mud storehouse, every discharging pipe with be connected a two-way screw conveyer to discharge the mud in mud storehouse from the discharging pipe.

Furthermore, each discharging pipe is provided with an electric gate valve, and when the bidirectional screw conveyor stops running due to faults or the material level of the sludge bin reaches a set position, the electric gate valves can be automatically closed.

Further, be provided with a plurality of discharge opening on the sludge warehouse, per two discharge openings are connected with an tripper, the tripper is sent into the sludge warehouse with mud from the discharge opening.

Furthermore, plastic plates are arranged on the inner walls of the sludge bin and the sludge hopper.

Further, the sludge bin adopts a double-layer tank sludge bin.

Further, the surface of the plastic plate is provided with a loosening machine.

Further, the plastic plate is a special plastic plate.

Furthermore, the sludge anti-blocking conveying system also comprises a coal-seeding air pipe, and sludge is uniformly dispersed in the hearth under the action of the coal-seeding air pipe.

Furthermore, an automatic butterfly valve is arranged on the coal-sowing air pipe, and the air quantity is automatically adjusted according to the coal-burning quantity and the sludge quantity

Compared with the prior art, the sludge anti-blocking conveying system has the advantages that the special plastic plate and the loosening machine are arranged on the inner wall surface of the sludge bin, and the sludge drying all-in-one machine is added in the sludge conveying process, so that the sludge blocking probability of the sludge bin is reduced, the problems of coal accumulation, caking and spontaneous combustion of coal in the coal bin are solved, stepless adjustment can be realized according to relevant parameters such as the sludge production amount, the load of a boiler, the exhaust temperature of the boiler and the like, unnecessary loss of speed reduction and shutdown of a paper machine caused by coal breakage of a coal feeder in production is avoided, and a large amount of manpower and material resources are saved.

Drawings

FIG. 1 is a schematic structural diagram of a sludge anti-clogging conveying system according to the embodiment;

fig. 2 is a schematic structural diagram of a sludge bin in the sludge anti-clogging conveying system according to the embodiment.

Detailed Description

In order to clearly show the technical scheme of the invention, the invention is further described with reference to the accompanying drawings.

Fig. 2 shows a sludge anti-clogging conveying system, which is used for conveying dried sludge to a boiler for incineration and power generation. The sludge anti-blocking conveying system comprises a sludge hopper, a spiral conveyor, a sludge drying all-in-one machine, a sludge bin 10, a discharger and a plurality of belts, and sludge is conveyed into the sludge hopper through the belts;

the screw conveyer is connected with the sludge hopper, the screw conveyer is connected with the sludge drying all-in-one machine through a belt, the sludge drying all-in-one machine is connected with the discharger through a belt, the discharger sends sludge into the sludge bin 10, and the sludge is stored in the sludge bin 10 after passing through the discharger.

The sludge anti-blocking conveying system further comprises a coal sowing air pipe, and sludge is uniformly scattered in the hearth under the action of the coal sowing air pipe.

The sludge treatment device is characterized in that plastic plates 20 are arranged on the inner walls of the sludge bin 10 and the sludge hopper, a loosening machine 30 is arranged on the surface of each plastic plate 20, three discharging pipes 40 are arranged on the sludge bin 10, the three discharging pipes 40 are connected with three bidirectional screw conveyors 50 in a one-to-one correspondence mode, the three bidirectional screw conveyors 50 convey sludge in the sludge bin 10 to the three discharging pipes 40 respectively, and the bidirectional screw conveyors 50 convey the sludge out through frequency conversion adjustment and are mixed with coal conveyed by a coal machine. The two ends discharge, thereby reducing the probability of blockage of the sludge bin. The bidirectional screw conveyor can be changed into a triple screw conveyor. The plastic plate 20 is a special plastic plate.

An electric gate valve is arranged on the discharge pipe 40, and when the bidirectional screw conveyor 50 stops running due to faults or the material level of the sludge bin reaches a low material level, the electric gate valve can be automatically closed.

The sludge bin is correspondingly provided with three dischargers, so that the blockage probability of the sludge bin can be reduced. The sludge bin adopts a double-layer tank sludge bin.

The coal-spreading air pipe comprises a coal-spreading air pipe, an automatic butterfly valve is arranged on the coal-spreading air pipe, and air quantity can be automatically adjusted according to the coal-burning quantity and the sludge quantity. Under the action of the coal-spreading wind, sludge and fire coal are uniformly spread in the hearth to be burned for power generation. The problems of coal bunker spontaneous combustion caused by caking of sludge and fire coal in the raw coal bunker, coal blockage and long-time caking temperature rise of the fire coal are solved, and the flow quantity of the raw coal in the raw coal bunker is increased, so that unnecessary economic losses of speed reduction and shutdown of a paper machine caused by insufficient air pressure, reduced power generation and the like are effectively avoided.

As shown in fig. 1, in this embodiment, the belts include a first belt, a second belt, a third belt, a fourth belt, a fifth belt and a sixth belt, the screw conveyor is a bidirectional screw conveyor, and the present embodiment includes a first sludge drying all-in-one machine and a second sludge drying all-in-one machine. During operation, mud transports to the sludge hopper in through first belt and No. second belt respectively, and the mud in the sludge hopper is carried to No. third belt and No. fourth belt respectively through first screw conveyer and second screw conveyer, reentries first sludge drying all-in-one and second sludge drying all-in-one, then rethread fifth belt and No. sixth belt carry the tripper, again from the tripper get into in the mud storehouse, rethread two-way screw conveyer delivers to the coal feeder export with mud and mixes with the fire coal, under the effect of broadcast coal tuber pipe, with even the scattering in furnace of mud.

In conclusion, the sludge anti-blocking conveying system provided by the invention has the advantages that the sludge drying all-in-one machine, the plastic plate on the inner wall of the sludge bin and the loosening machine are arranged, the sludge blocking probability of the sludge bin is reduced, the problems of caking of sludge and fire coal in the raw coal bin, spontaneous combustion of the coal bin caused by coal blockage and long-time caking temperature rise of the fire coal are solved, and the flow quantity of the raw coal in the raw coal bin is increased, so that unnecessary economic losses of speed reduction and shutdown of a paper machine caused by insufficient air pressure, reduction of generated energy and the like are effectively avoided, the labor capacity of workers is greatly reduced, a large amount of manpower and material resources are saved, and the economic benefit of a company is improved.

The above-described embodiments are merely illustrative of one embodiment of the present invention, and the description is more detailed and specific, but should not be construed to limit the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a conveying system is prevented blockking up by mud for carry the power generation of burning in coal fired boiler with the mud after mummification handles, its characterized in that: the sludge anti-blocking conveying system comprises a sludge hopper, a spiral conveyor, a sludge drying all-in-one machine, a sludge bin, a discharger and a plurality of belts; the sludge bucket with screw conveyer connects, screw conveyer pass through the belt with the sludge drying all-in-one is connected, the sludge drying all-in-one pass through the belt with the tripper is connected, the tripper sends into mud in the sludge warehouse, the sludge warehouse passes through the discharging pipe and is connected with two-way screw conveyer side by side, be equipped with the bulking machine in the sludge warehouse.

2. The sludge anti-clogging delivery system of claim 1, wherein: be provided with a plurality of discharging pipe on the mud storehouse, every discharging pipe with be connected a two-way screw conveyer to discharge the mud in mud storehouse from the discharging pipe.

3. The sludge anti-clogging delivery system of claim 2, wherein: and each discharge pipe is provided with an electric gate valve, and when the bidirectional screw conveyor stops running due to faults or the material level of the sludge bin reaches a set position, the electric gate valves can be automatically closed.

4. The sludge anti-clogging delivery system of claim 1, wherein: be provided with a plurality of discharge opening on the sludge warehouse, every two discharge openings are connected with an tripper, the tripper is sent into the sludge warehouse with mud self-discharging mouth in.

5. The sludge anti-clogging delivery system of claim 1, wherein: and plastic plates are arranged on the inner walls of the sludge bin and the sludge hopper.

6. The sludge anti-clogging delivery system of claim 5, wherein: the sludge bin adopts a sludge bin with double-layer tanks.

7. The sludge anti-clogging delivery system of claim 6, wherein: and a loosening machine is arranged on the surface of the plastic plate.

8. The sludge anti-clogging delivery system of claim 7, wherein: the plastic plate is a special plastic plate.

9. The sludge anti-clogging conveying system according to any one of claims 1 to 8, characterized in that: the sludge anti-blocking conveying system further comprises a coal-seeding air pipe, and sludge is uniformly dispersed in the hearth under the action of the coal-seeding air pipe.

10. The sludge anti-clogging delivery system of claim 9, wherein: an automatic butterfly valve is arranged on the coal-spreading air pipe, and air quantity is automatically adjusted according to coal-burning quantity and sludge quantity.