CN217855887U - Coal slurry preparation system for improving coal slurry concentration - Google Patents

Abstract

The utility model provides an improve coal slurry preparation system of coal slurry concentration relates to coal chemical industry technical field, and the scheme of adoption is: including the coal bunker of arranging in proper order along the direction of feed, the coal batcher of weighing, the coal pulverizer, the agitator with, mill blown down tank and second grade drum sieve, be connected with additive feeder and coal grinding water feeder on the pipeline between coal batcher of weighing and the coal pulverizer, additive feeder is arranged in adding the additive for the coal grinding to the system, coal grinding water feeder is arranged in adding the coal grinding water to the system, mix with the coal after the coal batcher of weighing and enter into the coal pulverizer and carry out the coal grinding technology, be connected with on the coal pulverizer and be used for the lubricated main bearing high low pressure oil station of usefulness of main bearing on the coal pulverizer. The utility model discloses the effect of bringing is: the system runs in parallel with the existing system, so that the concentration of the coal slurry is further improved while the stable operation of the equipment is ensured.

Description

Coal slurry preparation system for improving coal slurry concentration

Technical Field

The utility model relates to a coal chemical industry technical field especially relates to an improve coal slurry preparation system of coal slurry concentration.

Background

The existing three mills of the coal slurry preparation system cause each part of the mill to be seriously damaged due to long-term high-load operation, and the requirement of the high-load operation of the system can not be met by the two mills, so that the mills are damaged due to insufficient time for overhauling, a large amount of slurry leaks from the mills, screws fall off, large and small gear bearings are over-temperature, and meanwhile, due to the fact that rods can not be picked for a long time, the rod body of the mill is seriously damaged, the broken rods are obviously increased, the particle size grading is seriously reduced, indexes such as coal slurry concentration and viscosity are continuously reduced, and the realization of the low-consumption and high-yield target of the system is seriously influenced. This is the current state of the art.

Therefore, aiming at the current situation of the prior art, it is an urgent need to solve the problem of developing a coal slurry preparation system which operates in parallel with the existing system, ensures the stable operation of the equipment and further improves the concentration of the coal slurry.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that a large amount of slurry leakage, serious damage to a mill rod body, continuous reduction of indexes such as slurry concentration and viscosity and the like occur in the high-load operation of a mill in a slurry preparation system of three current mills, and the slurry preparation system for improving the slurry concentration is provided and designed, runs side by side with the current system, and further improves the slurry concentration when guaranteeing the equipment stable operation.

The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: the utility model provides an improve coal thick liquid preparation system of coal thick liquid concentration, include the coal bunker of arranging in proper order along the direction of feed, coal batcher of weighing, the coal pulverizer, the agitator, mill blown down tank and second grade drum sieve, be connected with additive feeder and coal-grinding water feeder on the pipeline between coal batcher of weighing and the coal pulverizer, additive feeder is arranged in adding the additive for the coal grinding to the system, coal-grinding water feeder is arranged in adding the coal-grinding water to the system, mix with the coal after the coal batcher of weighing of coal and enter into the coal pulverizer and carry out the coal-grinding technology, be connected with the main bearing high-low pressure oil station that is used for lubricating the usefulness of main bearing on the coal pulverizer. Through this coal slurry preparation system of running side by side on current system basis, increased former mill and overhauld usable time, carry out systematic maintenance to the whole systematic problem of mill, carry out the rod iron ratio to three mills respectively, be greater than 325 mesh granule and promote to 30% by former 25% on average, it is obvious to promote the effect. The concentration of the coal slurry is increased from 63.5% to 64.02%, and the fluidity and the stability of the coal slurry are both greatly improved. During the maintenance, the load of the mill is stable, the concentration of the coal slurry is not influenced, and the state that the concentration of the coal slurry and the yield of methanol are seriously influenced by the previous maintenance of the mill is greatly improved.

Furthermore, the coal grinding water feeding device comprises a water tank, the water tank is communicated with the coal grinding machine, and a water pump is arranged on a pipeline between the water tank and the coal grinding machine. The sink also communicates with an external fresh water supply. The system is supplied with fresh water which mixes the coal and additives into the coal mill.

Furthermore, a water level regulating valve is arranged on the water tank. The water level in the water tank is adjusted through a water level adjusting valve, and the flow of the coal grinding water is adjusted through a flow valve.

Furthermore, the additive feeding device comprises an additive tank, the additive tank is communicated with the coal mill, an additive feeding pump is arranged on a pipeline between the additive tank and the coal mill, the additive tank is also communicated with an additive preparation tank, additives prepared in the additive preparation tank enter the additive tank for storage, and then the additives are conveyed to an inlet of the coal mill through the additive feeding pump for coal milling.

Furthermore, the water tank and the additive tank are arranged in parallel with the coal bunker.

Furthermore, a circulating water feeding pipe and a circulating water return pipe are connected to the coal mill and used for carrying out water circulation in the coal mill.

Furthermore, a low-pressure coal slurry pump is arranged on a pipeline between the discharge chute of the mill and the secondary rotary screen and used for providing power for conveying coal slurry to the secondary rotary screen.

Furthermore, a coal slurry groove is connected to the secondary drum screen. And conveying the coal slurry in the discharge chute of the mill to a secondary rotary screen by a low-pressure coal slurry pump, and after large particles in the coal slurry are screened by the secondary rotary screen for two times, feeding the qualified coal slurry into a coal slurry tank.

According to the technical scheme, the utility model has the advantages of it is following:

this scheme provides a coal slurry preparation system of improvement coal slurry concentration, and through this coal slurry preparation system of side by side operation on current system basis, increased former mill and overhauld usable time, carry out the systemic overhaul to mill entire system problem, carry out the rod iron ratio to three mills respectively, be greater than 325 mesh granule and promote to 30% by former 25% on average, it is obvious to promote the effect. The concentration of the coal slurry is improved from 63.5 percent to 64.02 percent, and the fluidity and the stability of the coal slurry are greatly improved. During the maintenance, the load of the mill is stable, the concentration of the coal slurry is not influenced, and the state that the concentration of the coal slurry and the yield of methanol are seriously influenced by the previous maintenance of the mill is greatly improved.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

In the figure, 1, a fresh water supply station, 2, a water tank, 3, a water pump, 4, a coal bunker, 5, a coal weighing feeder, 6, an additive tank, 7, an additive feeding pump, 8, a coal mill, 9, a main bearing high-low pressure oil station, 10, a stirrer, 11, a mill discharge tank, 12, a secondary rotary screen, 13 and a coal slurry tank.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present embodiment, and it is obvious that the embodiments described below are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection of this patent.

As shown in fig. 1, the present embodiment provides a coal slurry preparation system for increasing the concentration of coal slurry, including a coal bunker 4, a coal weighing and feeding device 5, a coal mill 8, a stirrer 10, a mill discharge chute 11, and a secondary rotary screen 12, which are sequentially arranged along a feeding direction, wherein an additive feeding device and a coal milling water feeding device are connected on a pipeline between the coal weighing and feeding device 5 and the coal mill 8, the additive feeding device is used for adding additives for coal milling into the system, the coal milling water feeding device is used for adding water for coal milling into the system, the water is mixed with coal weighed by the coal weighing and feeding device 5, and the coal is fed into the coal mill 8 for a coal milling process, and the coal mill 8 is connected with a main bearing high-low pressure oil station 9 for lubricating a main bearing on the coal mill 8.

Wherein, coal grinding water feeder includes basin 2, and basin 2 and coal pulverizer 8 intercommunication are provided with water pump 3 on the pipeline between basin 2 and the coal pulverizer 8. The water tank 2 is also in communication with an external fresh water supply 1. The system is supplied with fresh water which mixes the coal and additives into the coal mill 8. The water tank 2 is provided with a water level regulating valve. The water level in the water tank 2 is adjusted through a water level adjusting valve, and the flow of the coal grinding water is adjusted through a flow valve.

The additive feeding device comprises an additive tank 6, the additive tank 6 is communicated with a coal mill 8, an additive feeding pump 7 is arranged on a pipeline between the additive tank 6 and the coal mill 8, the additive tank 6 is also communicated with an additive preparation tank, additives prepared in the additive preparation tank enter the additive tank 6 to be stored, and then the additives are conveyed to an inlet of the coal mill 8 through the additive feeding pump 7 to be used for coal milling.

In addition, the water tank 2 and the additive tank 6 are arranged in parallel with the coal bunker 4. The coal mill 8 is connected with a circulating water feeding pipe and a circulating water return pipe for water circulation in the coal mill 8.

The working principle is as follows: raw material coal with the granularity of below 25mm from a raw material storage and transportation system is continuously fed into a coal bunker 4 in front of a coal mill 8 by controlling the flow, the use amount of the coal bunker 4 can be stored for 7 hours, and the coal in the coal bunker 4 is metered by a coal weighing feeder 5 and then fed into the coal mill 8; the water for grinding coal is stored in the two water tanks 2, the water levels of the water tanks 2 are respectively adjusted through water level adjusting valves, the water for grinding coal is delivered to a coal grinding machine 8 through a water pump 3, and the flow of the water for grinding coal is adjusted through a flow adjusting valve. The prepared coal slurry additive is stored in an additive preparation tank, is conveyed into an additive tank 6 by an additive preparation pump, and is conveyed to the inlet of a coal mill for coal milling by an additive feeding pump 7. Coal, coal grinding water and a coal slurry additive are mixed in a coal grinding machine 8 and ground into coal slurry by a steel bar, the coal slurry in the coal grinding machine 8 overflows into a secondary drum screen 12, and after large particles and other impurities in the coal slurry are screened out, the coal slurry automatically flows into a discharge chute 11 of the grinding machine. The coal slurry in the discharge chute 11 of the mill is conveyed to a secondary drum screen 12 by a low-pressure coal slurry pump, and after large particles in the coal slurry are screened twice by the secondary drum screen 12, the qualified coal slurry enters a coal slurry tank 13.

The terms "upper", "lower", "outside", "inside" and the like in the description and claims of the present invention and the above drawings (if any) are used to distinguish relative relationships in position, and are not necessarily qualitative. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. The utility model provides an improve coal slurry preparation system of coal slurry concentration, a serial communication port, include the coal bunker of arranging in proper order along the direction of feed, coal batcher of weighing, the coal pulverizer, the agitator, mill blown down tank and second grade drum sieve, be connected with additive feeder and coal-grinding water feeder on the pipeline between coal batcher of weighing and the coal pulverizer, additive feeder is arranged in adding the additive for the coal grinding to the system, coal-grinding water feeder is arranged in adding the coal-grinding water to the system, be connected with on the coal pulverizer and be used for the lubricated main bearing high-low pressure oil station of usefulness of main bearing on the coal pulverizer.

2. The system of claim 1, wherein the coal mill water feeding device comprises a water tank, the water tank is communicated with the coal mill, and a water pump is arranged on a pipeline between the water tank and the coal mill.

3. The system of claim 2, wherein the water tank is provided with a water level control valve.

4. The system of claim 1, wherein the additive feeding device comprises an additive tank, the additive tank is in communication with the coal mill, an additive feeding pump is disposed on a pipeline between the additive tank and the coal mill, and an additive preparation tank is in communication with the additive tank.

5. The system of claim 4, wherein the water tank and the additive tank are arranged in parallel with the coal bunker.

6. The system for preparing coal slurry with increased coal slurry concentration according to any one of claims 1 to 5, wherein a circulating water feeding pipe and a circulating water returning pipe are connected to the coal pulverizer.

7. The system for preparing coal slurry with improved coal slurry concentration according to any one of claims 1 to 5, wherein a low-pressure coal slurry pump is arranged on a pipeline between the discharge chute of the mill and the secondary rotary screen.

8. The system of claim 7, wherein a slurry tank is coupled to the secondary trommel.

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