阅读说明：本技术 高水分煤制备水煤浆制浆提浓工艺及设备 (Pulping and concentrating process and equipment for preparing coal water slurry from high-moisture coal ) 是由 吕本度 钱云鸿 吕云福 于 2020-06-11 设计创作，主要内容包括：本发明公开了一种高水分煤制备水煤浆制浆提浓工艺及设备,将高水分煤通过计量称重后送入水煤浆磨煤机,按照设定配比加入药剂和水,由水煤浆磨煤机研磨后煤浆经过振动筛落入缓冲罐,从缓冲罐中抽出部分水煤浆送入撬装式超细浆备料机组,经超细磨机研磨后超细浆回送到水煤浆磨煤机,与高水分煤进行二次研磨后经振动筛送入缓冲罐,由输浆泵送入调浆系统进行后期处理。本发明所采用的工艺和设备实现通过超细浆的掺入,提高了浆体堆积效率,实现高水分煤制备高浓度水煤浆,提高水煤浆的锅炉燃烧效率和气化炉气化效率,该工艺和设备可在已建成投产的高水分煤制备水煤浆制浆生产线上直接添加撬装式超细浆备料机组,以降低现有生产线改造成本。(The invention discloses a process and equipment for preparing coal water slurry and concentrating the same, wherein the high moisture coal is weighed by a meter and then sent into a coal water slurry mill, a medicament and water are added according to a set proportion, the coal slurry ground by the coal water slurry mill falls into a buffer tank through a vibrating screen, part of the coal slurry is pumped out from the buffer tank and sent into a skid-mounted superfine slurry preparation unit, the superfine slurry ground by a superfine mill is sent back to the coal water slurry mill, the superfine slurry and the high moisture coal are ground for the second time and then sent into the buffer tank through the vibrating screen, and the high moisture coal is sent into a slurry mixing system through a slurry conveying pump for post-treatment. The process and the equipment adopted by the invention realize the doping of the superfine slurry, improve the slurry accumulation efficiency, realize the preparation of the high-concentration water-coal-slurry by the high-moisture coal, and improve the boiler combustion efficiency and gasification efficiency of the gasification furnace of the water-coal-slurry.)

1. A high-moisture coal preparation water coal slurry pulping and concentrating device comprises a feeding system (10) and a water coal slurry coal mill (4), and is characterized in that the feeding system (10) is conveyed to the inlet of the water coal slurry coal mill (4) after being weighed by a meter, a medicament dilution tank (1) and a water tank (2) are connected with the inlet of the water coal slurry coal mill (4) through a pipeline, the outlet of the water coal slurry coal mill (4) is connected with a buffer tank (7), a stabilizer dilution tank (3) is connected with the inlet of a stability treatment tank in a size mixing system (9) through a pipeline, a vibrating screen (5) is arranged between the outlet of the water coal slurry coal mill (4) and the buffer tank (7), three outlets are arranged on the buffer tank (7), the first outlet is connected with the size mixing system (9) through a pipeline, the second outlet is connected with a skid-mounted superfine slurry preparation unit (8) through a pipeline, and the, the unqualified slurry barrel (6) is connected with the inlet of the coal water slurry coal mill (4) through a pipeline, the skid-mounted superfine slurry preparation unit (8) is connected with the coal water slurry coal mill (4) through a pipeline, a liquid delivery pump and a flowmeter are arranged on the pipeline, and the equipment is controlled by a program control cabinet (11).

2. The equipment for preparing, pulping and concentrating coal water slurry by using high-moisture coal according to claim 1, wherein the skid-mounted ultrafine slurry preparation unit (8) comprises a feeding stirring barrel (82), an ultrafine grinding machine (83) and a fine slurry storage tank (84), the reagent dilution tank (1), the water tank (2) and the buffer tank (7) are respectively connected with an inlet of the feeding stirring barrel (82) through a pipeline, an outlet of the feeding stirring barrel (82) is connected with the ultrafine grinding machine (83), an outlet of the ultrafine grinding machine (83) is connected with the fine slurry storage tank (84) through a pipeline, an outlet of the fine slurry storage tank (84) is connected with an inlet of the coal water slurry grinding machine (4) through a pipeline, a liquid delivery pump and a flow meter are arranged on the pipeline, and the equipment is controlled by a program controller (81).

3. A pulping and concentrating process for preparing coal water slurry from high-moisture coal is characterized by comprising the following process steps:

high-moisture coal is measured and weighed by a feeding system and then conveyed into a coal water slurry coal mill, and after a medicament and water are added into the coal water slurry coal mill, the coal water slurry coal mill grinds the coal water slurry coal mill;

grinding the coal water slurry by a coal water slurry grinder, filtering and screening the coal water slurry by a vibrating screen, then feeding the filtered coal water slurry into a buffer tank, extracting 8-15% of the coal water slurry from the buffer tank, sending the extracted coal water slurry to a skid-mounted superfine slurry preparation unit, mixing a certain proportion of medicament and water, grinding the mixture by a superfine grinder for the second time to obtain superfine coal water slurry with the concentration of 50-55% and the particle size of 8-15 um;

the superfine coal water slurry is proportionally mixed into a coal water slurry mill by a metering type slurry conveying pump according to a set proportion to be secondarily ground with high-moisture coal, and the superfine slurry is continuously filled, so that the slurry accumulation efficiency is improved, and the concentration purpose is achieved;

and the coal water slurry overflowing from the slurry outlet of the coal water slurry mill is filtered and screened again by a vibrating screen to separate steel balls and impurities, then the separated coal water slurry is input into a buffer tank, the unqualified coal water slurry is conveyed to an unqualified slurry barrel, the unqualified coal water slurry is returned to the coal water slurry mill by a slurry conveying pump according to a set proportion to be ground again, and the qualified coal water slurry is conveyed to a slurry mixing system to be subjected to aftertreatment to obtain qualified fuel coal water slurry and gasified coal water slurry.

Technical Field

The invention relates to a process and equipment for preparing coal water slurry by high-moisture coal and pulping and concentrating the coal water slurry.

Background

The coal water slurry is a novel, efficient and clean coal-based liquid fuel and a liquid gasification raw material for coal chemical industry, and is a mixture prepared from 60-65% of fine coal particles with different particle size distributions, about 34-39% of water and about 1% of chemical additives. The process and the equipment can prepare high-moisture coal into high-concentration fuel coal water slurry and gasified coal water slurry, and are a flow-state clean fuel and a coal chemical gasification raw material. China is wide in region and is influenced by geological conditions, coal quality of a part of mining areas is high in moisture, the concentration of the prepared fuel coal water slurry is about 56-60%, the concentration of gasified coal water slurry is about 55-60%, efficient combustion of a coal water slurry boiler and efficient gasification of a gasification furnace are seriously influenced, therefore, the concentration of the coal water slurry prepared from high-moisture coal needs to be improved, and the filling rate of slurry can be improved by adding superfine slurry, so that the concentration of the coal water slurry is improved by about 2-3%. The skid-mounted superfine slurry preparation unit can form a complete high-concentration coal slurry preparation production line with a coal slurry mill, so that the integral integrity of a new production line for preparing the coal slurry is realized, and the perfect reconstruction of the produced coal slurry preparation production line can also be realized.

Disclosure of Invention

The invention relates to a process and equipment for preparing and concentrating coal water slurry with high moisture quality, which is additionally provided with a skid-mounted unit for superfine grinding, so that the concentration of the coal water slurry is improved and reformed on the basis of the original coal water slurry preparation production line.

In order to realize the purpose, the method adopted by the invention is as follows: a high-moisture coal preparation coal water slurry pulping and concentrating device comprises a feeding system and a coal water slurry coal mill, wherein the feeding system is conveyed to the inlet of the coal water slurry coal mill after being weighed by measurement, a medicament dilution tank and a water tank are connected with the inlet of the coal water slurry coal mill through a pipeline, the outlet of the coal water slurry coal mill is connected with a buffer tank, a stabilizer dilution tank is connected with the inlet of a stability treatment tank in a slurry adjusting system through a pipeline, a vibrating screen is arranged between the outlet of the coal water slurry coal mill and the buffer tank, three outlets are arranged on the buffer tank, the first outlet is connected with a slurry adjusting system through a pipeline, the second outlet is connected with a skid-mounted superfine slurry preparation unit through a pipeline, the third outlet is connected with an unqualified slurry barrel through a pipeline, the unqualified slurry barrel is connected with the inlet of the coal slurry coal mill through a pipeline, the skid-mounted, the equipment is controlled by a program control cabinet.

Including pan feeding agitator, superfine mill and fine thick liquid storage tank in the skid-mounted superfine thick liquid unit of prepareeing material, medicament dilution tank, water tank and buffer tank pass through the entry of pipe connection pan feeding agitator respectively, and the export of pan feeding agitator is through connecting superfine mill, and the superfine mill export passes through the pipe connection fine thick liquid storage tank, and the export of fine thick liquid storage tank passes through the entry of pipe connection coal slurry coal pulverizer, is provided with liquid delivery pump and flowmeter on the above-mentioned pipeline, and equipment is controlled by program controller.

A pulping and concentrating process for preparing coal water slurry from high-moisture coal comprises the following process steps:

(1) high-moisture coal is measured and weighed by a feeding system and then conveyed into a coal water slurry coal mill, and after a medicament and water are added into the coal water slurry coal mill, the coal water slurry coal mill grinds the coal water slurry coal mill;

(2) grinding the coal water slurry by a coal water slurry grinder, filtering and screening the coal water slurry by a vibrating screen, then feeding the filtered coal water slurry into a buffer tank, extracting 8-15% of the coal water slurry from the buffer tank, sending the extracted coal water slurry to a skid-mounted superfine slurry preparation unit, mixing a certain proportion of medicament and water, grinding the mixture by a superfine grinder for the second time to obtain superfine coal water slurry with the concentration of 50-55% and the particle size of 8-15 um;

(3) the superfine coal water slurry is proportionally mixed into a coal water slurry mill by a metering type slurry conveying pump according to a set proportion to be secondarily ground with high-moisture coal, and the superfine slurry is continuously filled, so that the slurry accumulation efficiency is improved, and the concentration purpose is achieved;

(4) and the coal water slurry overflowing from the slurry outlet of the coal water slurry mill is filtered and screened again by a vibrating screen to separate steel balls and impurities, then the separated coal water slurry is input into a buffer tank, the unqualified coal water slurry is conveyed to an unqualified slurry barrel, the unqualified coal water slurry is returned to the coal water slurry mill by a slurry conveying pump according to a set proportion to be ground again, and the qualified coal water slurry is conveyed to a slurry mixing system to be subjected to aftertreatment to obtain qualified fuel coal water slurry and gasified coal water slurry.

The beneficial effects are as follows: the process and the equipment adopted by the invention increase the slurry accumulation efficiency through the doping of the fine slurry, thereby realizing the concentration of the coal water slurry prepared by high-moisture coal, and improve the combustion efficiency and gasification efficiency of the coal water slurry through the concentration.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is the skid-mounted superfine pulp preparation unit.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

As shown in figure 1, the high moisture coal preparation water-coal-slurry pulping and concentrating device comprises a feeding system 10 and a water-coal-slurry coal mill 4, wherein the feeding system 10 is conveyed to the inlet of the water-coal-slurry coal mill 4 after being measured and weighed, a reagent dilution tank 1 and a water tank 2 are connected with the inlet of the water-coal-slurry coal mill 4 through pipelines, the outlet of the water-coal-slurry coal mill 4 is connected with a buffer tank 7, a stabilizer dilution tank 3 is connected with the inlet of a stability treatment tank in a slurry mixing system 9 through a pipeline, a vibrating screen 5 is arranged between the outlet of the water-coal-slurry coal mill 4 and the buffer tank 7, three outlets are arranged on the buffer tank 7, the first outlet is connected with the slurry mixing system 9 through a pipeline, the second outlet is connected with a skid-mounted superfine slurry preparation unit 8 through a pipeline, the third outlet is connected with an unqualified slurry barrel 6 through a pipeline, the unqualified slurry barrel 6, the pipeline is provided with a liquid delivery pump and a flowmeter, and the equipment is controlled by a program control cabinet 11.

As shown in fig. 2, the skid-mounted ultrafine slurry preparation unit 8 includes a material feeding stirring barrel 82, an ultrafine grinding machine 83 and a fine slurry storage tank 84, the reagent dilution tank 1, the water tank 2 and the buffer tank 7 are respectively connected to inlets of the material feeding stirring barrel 82 through pipelines, an outlet of the material feeding stirring barrel 82 is connected to the ultrafine grinding machine 83 through a connection, an outlet of the ultrafine grinding machine 83 is connected to the fine slurry storage tank 84 through a pipeline, an outlet of the fine slurry storage tank 84 is connected to an inlet of the coal water slurry coal grinding machine 4 through a pipeline, the pipeline is provided with a liquid delivery pump and a flow meter, and the equipment is controlled by the program controller.

A pulping and concentrating process for preparing coal water slurry from high-moisture coal comprises the following process steps:

(1) high-moisture coal is measured and weighed by a feeding system and then conveyed into a coal water slurry coal mill, and after a medicament and water are added into the coal water slurry coal mill, the coal water slurry coal mill grinds the coal water slurry coal mill;

(2) grinding the coal water slurry by a coal water slurry grinder, filtering and screening the coal water slurry by a vibrating screen, then feeding the filtered coal water slurry into a buffer tank, extracting 8-15% of the coal water slurry from the buffer tank, sending the extracted coal water slurry to a skid-mounted superfine slurry preparation unit, mixing a certain proportion of medicament and water, grinding the mixture by a superfine grinder for the second time to obtain superfine coal water slurry with the concentration of 50-55% and the particle size of 8-15 um;

(3) the superfine coal water slurry is proportionally mixed into a coal water slurry mill by a metering type slurry conveying pump according to a set proportion to be secondarily ground with high-moisture coal, and the superfine slurry is continuously filled, so that the slurry accumulation efficiency is improved, and the concentration purpose is achieved;

(4) and the coal water slurry overflowing from the slurry outlet of the coal water slurry mill is filtered and screened again by a vibrating screen to separate steel balls and impurities, then the separated coal water slurry is input into a buffer tank, the unqualified coal water slurry is conveyed to an unqualified slurry barrel, the unqualified coal water slurry is returned to the coal water slurry mill by a slurry conveying pump according to a set proportion to be ground again, and the qualified coal water slurry is conveyed to a slurry mixing system to be subjected to aftertreatment to obtain qualified fuel coal water slurry and gasified coal water slurry.

The process and the equipment adopted by the invention realize the ultra-fining of the particles in the coal water slurry, so that the filling amount of the solid particles in the finished coal water slurry is increased, the concentration of the coal water slurry is realized, the combustion rate and the carbon conversion rate of the coal water slurry are improved, the skid-mounted ultra-fine slurry preparation unit is convenient to install, and can be directly applied to the existing coal water slurry preparation production line, and the production line modification cost is reduced.

The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.