CN214235538U

CN214235538U - CFB (circulating fluidized bed) solid sulfur ash homogenizing and stabilizing pretreatment device

Info

Publication number: CN214235538U
Application number: CN202022974683.4U
Authority: CN
Inventors: 潘荣伟; 欧天安; 何秀强; 农玉伯
Original assignee: Guangxi Academy Of Building Materials Scientific Research And Design Co ltd
Current assignee: Guangxi Academy Of Building Materials Scientific Research And Design Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-09-21
Anticipated expiration: 2030-12-09

Abstract

The utility model relates to a building material field specifically discloses a CFB solid sulphur lime-ash homogenization, stabilization preprocessing device, and the flow is that get CFB solid sulphur ash (dry ash discharge) and slag (dry) from the power plant, through the automobile transportation to the factory in, solid sulphur ash goes into fly ash storehouse through bulk truck quick-operation joint pump, and the slag then sends into the slag storehouse through the lifting machine. The raw materials are weighed and input into a ball mill, and a ground finished product contains a large amount of fine ash and is conveyed into a transition storage and a finished product storage through an air conveying chute and a lifter. The dust collector at the tail of the ball mill can ventilate and remove dust of the ball mill, and the finer fine ash is reserved and conveyed to the transition storage and the finished product storage. The production device can effectively solve the problems of high calcium and high sulfur, low activity, large water absorption capacity, poor fluidity, uneven components, large performance difference and the like of the CFB sulfur-fixing ash, obviously improves the stability of the pretreatment efficiency and the performance of the powder finished product, and realizes the large-dosage resource utilization of the CFB sulfur-fixing ash in the building materials.

Description

CFB (circulating fluidized bed) solid sulfur ash homogenizing and stabilizing pretreatment device

Technical Field

The utility model belongs to the building material field, in particular to CFB gu sulphur lime-ash homogenization, stabilization preprocessing device.

Background

CFB fluidized bed ash is a type of desulfurized solid waste produced by power plants that generate electricity using the Circulating Fluidized Bed (CFB) coal burning technology. Taking a 2 × 350 mw self-contained power plant project as an example, about 250-300 ten thousand tons of CFB fluidized bed ash residues are generated each year. With the development of economy and the progress of science and technology, the comprehensive treatment and utilization of CFB (circulating fluidized bed) sulfur-fixing ash slag at home and abroad achieves certain achievements, and the fluidized bed coal-fired sulfur-fixing ash slag can be comprehensively utilized through the following ways according to the characteristics of the fluidized bed coal-fired sulfur-fixing ash slag and the application experience of other coal-fired byproducts: as building materials, backfilling mine shafts, backfilling embankment subgrades, neutralizing and solidifying municipal waste, as soil conditioners, and the like.

Aiming at the direction of using CFB sulfur-fixing ash slag as resources for building materials, the existing production process can not well solve the problems of high calcium and high sulfur, low activity, large water absorption capacity, poor fluidity, uneven components, low mixing amount and the like of the CFB sulfur-fixing ash slag.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a CFB gu sulphur lime-ash homogenization, stabilization preprocessing device make the CFB gu sulphur lime-ash performance after the preliminary treatment can reach standard more than III grades of fly ash, and the better realization is mixed the volume resource greatly and is utilized in building material goods.

In order to achieve the above object, the utility model provides a CFB gu sulphur lime-ash homogenization, stabilization preprocessing device, include: the coal ash storage is used for storing coal ash, and a discharge port of the coal ash storage is connected with a first quantitative feeding unit; the slag storage is used for storing slag, and a discharge hole of the slag storage is connected with a second quantitative feeding unit; the feeding hole of the ball mill is simultaneously connected with the first quantitative feeding unit and the second quantitative feeding unit, the first discharging hole of the ball mill is connected with a dust collector, the second discharging hole of the ball mill is connected with a transition storage base, the discharging hole of the dust collector is connected and converged with the second discharging hole of the ball mill again, the first discharging hole of the ball mill discharges dust, and the second discharging hole of the ball mill discharges debris; and the feed inlet of the finished product storage is connected with the discharge outlet of the transition storage.

As an improvement of the scheme, the first quantitative feeding unit comprises a steady-flow double-pipe screw feeder, a screw quantitative feeding scale and a chain conveyor which are sequentially connected.

As an improvement of the scheme, the second quantitative feeding unit comprises a batching speed regulation electronic belt scale and a belt conveyor which are sequentially connected, and the belt conveyor is provided with a full-sealed cover.

As an improvement of the scheme, the dust collector is an air box pulse bag type dust collector.

As an improvement of the scheme, the number of the transition storage reservoirs is two, and a second discharge port of the ball mill is provided with a fork which is respectively communicated with the two transition storage reservoirs.

As an improvement of the scheme, an air conveying chute, an elevator and an air conveying chute are sequentially arranged between a second discharge port of the ball mill and the transition storage warehouse, and an air conveying chute, an elevator and an air conveying chute are sequentially arranged between the transition storage warehouse and the finished product storage warehouse.

As an improvement of the scheme, a discharge hole of an air conveying chute for connecting the transition storage warehouse and the finished product storage warehouse is provided with a multipoint blanking chute.

The utility model discloses following beneficial effect has:

the scheme designs a set of production line (including equipment model selection) and a process flow brought by the production line, the optimal proportion of the sulfur fixation ash can be adjusted before the raw materials enter the ball mill, an intermediate product is efficiently output, and meanwhile, the intermediate product effectively solves the problems of high calcium and high sulfur, activity, large water absorption, poor fluidity and uneven component distribution of the CFB sulfur fixation ash.

The dust collector in the production line effectively collects the raise dust, reduces environmental pollution, and simultaneously, the part which can still be continuously utilized in the raise dust is put into the process flow again, so that the utilization rate of raw materials is improved.

The production line output can be obviously improved, the transition storage warehouse plays a role in temporarily storing finished products and offsetting the interference of production line output fluctuation, and the subsequent finished product storage warehouse can stably and continuously discharge the finished products.

Drawings

FIG. 1 is a detailed block diagram of a production line according to an embodiment;

FIG. 2 is a schematic view of a production line according to an embodiment.

Description of reference numerals: 11. a fly ash storage; 12. a steady flow double-tube screw feeder; 13. a spiral quantitative feeding scale; 14. a chain conveyor; 21. a slag reservoir; 22. electronic belt conveyor scale of speed governing of batching; 23. a belt conveyor; 31. a ball mill; 32. a dust collector; 40. a transition reservoir; 50. a finished product storage; 61. an air delivery chute; 62. a hoist; 63. multipoint blanking chute.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

Referring to fig. 1 and 2, the utility model discloses a CFB gu sulphur lime-ash homogenization, stabilization preprocessing device, the CFB gu sulphur lime-ash after the preliminary treatment can be used to make other building parts, for example wallboard, concrete block/brick.

Referring to fig. 1, the flow path is from left to right, and the device comprises a fly ash storage 11, a steady flow double-pipe screw feeder 12, a screw quantitative feeding scale 13 and a chain conveyor 14 which are connected in sequence, so that the input amount of raw materials can be controlled; the device also comprises a slag storage 21, a batching speed-regulating electronic belt scale 22 and a belt conveyor 23 which are connected in sequence, so that the input amount of raw materials can be controlled. Because the raw materials processed by the two lines are different, one is in a shape of a broken stone block, and the other is in a powder shape, the structures of the two lines are properly adjusted. The belt conveyor 23 is provided with a totally enclosed cover to prevent dust.

As can be seen from fig. 1, a fly ash storage 11 and three slag storages are arranged, a batching speed-regulating electronic belt scale 22 is arranged below each slag storage, and discharge ports of the three batching speed-regulating electronic belt scales 22 are connected with the same belt conveyor 23. The two production lines into which the raw materials are put are joined and then connected to the ball mill 31.

A first discharge hole of the ball mill 31 is connected with a dust collector 32 for collecting dust, flying dust and the like in the stirring process; the second outlet connects the air delivery chute 61, the elevator 62 and the further air delivery chute 61, eventually delivering the main finished product to the transition store 40. The dust collector 32 puts the part which can be used again into the process flow, in particular the discharge port of the dust collector 32 is connected to the air conveying chute 61 which is directly butted with the ball mill 31 through the air conveying chute 61. Preferably, the dust collector 32 is a gas tank pulse bag type dust collector.

In fig. 1, two transition storehouses 40 can be seen, and accordingly, the discharge ports of the air delivery chutes 61 are branched and connected to the transition storehouses 40 through the air delivery chutes 61, respectively. The inlet of the finished product store 50 is connected to the outlets of the transition stores 40, and accordingly the outlets of the two transition stores 40 share one air transfer chute 61 and are connected to a lift 62 and another air transfer chute 61. The arrangement of the air conveying chute 61 and the elevator 62 ensures that the arrangement of related equipment is flexible, and the interference of fall and distance is avoided.

Preferably, the outlet of the air delivery chute 61 connecting the transition store 40 and the finished product store 50 is provided with a multipoint blanking chute 63.

The production flow is as follows: fly ash (dry fly ash) and slag (dry slag) are taken from a power plant and transported to the plant by an automobile, the fly ash is pumped into the fly ash storage 11 through a quick connector of a bulk truck, and the slag is sent into the slag storage 21 through an elevator 62. The above raw materials are weighed and fed into a ball mill 31, and the ground finished product contains a large amount of fine ash and is fed into a transition storage 40 and a finished product storage 50 through an air delivery chute 61 and a lifter 62. The dust collector 32 at the end of the ball mill 31 can ventilate and remove dust from the ball mill 31, and the finer fine ash is retained and transported to the transition storage 40 and the finished product storage 50.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A CFB (circulating fluidized bed) fluidized bed combustion ash slag homogenizing and stabilizing pretreatment device is characterized by comprising:

the coal ash storage is used for storing coal ash, and a discharge port of the coal ash storage is connected with a first quantitative feeding unit;

the slag storage is used for storing slag, and a discharge hole of the slag storage is connected with a second quantitative feeding unit;

the feeding hole of the ball mill is simultaneously connected with the first quantitative feeding unit and the second quantitative feeding unit, the first discharging hole of the ball mill is connected with a dust collector, the second discharging hole of the ball mill is connected with a transition storage base, the discharging hole of the dust collector is connected and converged with the second discharging hole of the ball mill again, the first discharging hole of the ball mill discharges dust, and the second discharging hole of the ball mill discharges debris;

and the feed inlet of the finished product storage is connected with the discharge outlet of the transition storage.

2. The CFB fluidized bed combustion ash slag homogenizing and stabilizing pretreatment device according to claim 1, characterized in that: the first quantitative feeding unit comprises a steady flow double-pipe screw feeder, a screw quantitative feeding scale and a chain conveyor which are connected in sequence.

3. The CFB fluidized bed combustion ash slag homogenizing and stabilizing pretreatment device according to claim 2, characterized in that: the second quantitative feeding unit comprises a batching speed regulation electronic belt scale and a belt conveyor which are connected in sequence, and the belt conveyor is provided with a full-sealed cover.

4. The CFB fluidized bed combustion ash slag homogenizing and stabilizing pretreatment device according to claim 3, characterized in that: the dust collector is an air box pulse bag type dust collector.

5. The CFB fluidized bed combustion ash slag homogenizing and stabilizing pretreatment device according to claim 4, characterized in that: the transition storage warehouse sets up two, the second discharge gate of ball mill sets up the bifurcation and communicates two transition storages respectively.

6. The CFB fluidized bed ash slag homogenizing and stabilizing pretreatment device according to any one of claims 1 to 5, characterized in that: be equipped with air conveying chute, lifting machine and air conveying chute between the second discharge gate of ball mill and the transition storehouse in proper order, the transition storehouse with be equipped with air conveying chute, lifting machine and air conveying chute between the finished product storehouse in proper order.

7. The CFB fluidized bed combustion ash slag homogenizing and stabilizing pretreatment device according to claim 6, characterized in that: and a discharge port of the air conveying chute for connecting the transition storage warehouse and the finished product storage warehouse is provided with a multipoint blanking chute.