阅读说明：本技术 一种煤粉流化沉降分离装置及分离方法 (Pulverized coal fluidization settling separation device and separation method ) 是由 汪后港 翟鹏宇 陆超 许秋霞 郑志强 彭登明 李晨 王海飞 刘祥亮 陈建伟 杨圣 于 2021-08-24 设计创作，主要内容包括：本发明涉及一种煤粉流化沉降分离装置及分离方法,装置包括用于混设煤粉样和水的进样混匀器和具有进水口和出水口的流化沉降池,进水口和出水口之间通过给水管串联连接有用于使流化沉降池和给水管内的水流循环流动的动力水泵,流化沉降池中的循环水流沿单一水平方向流动,进样混匀器与给水管连通,流化沉降池的底部设置有多组煤粉收集装置,各组煤粉收集装置沿流化沉降池内循环水流的流动方向依次顺序设置。本发明的煤粉流化沉降分离装置利用煤粉样颗粒自身重力和循环水流水平推力的作用,可对不同密度的煤粉样颗粒进行流化沉降分离,该装置可以用于实验室小批量煤粉样分离,便于操作,自动化程度高,分离精密度和准确度高,且不产生危废弃物。(The invention relates to a pulverized coal fluidization settling separation device and a separation method, the device comprises a sample injection mixer for mixing pulverized coal samples and water and a fluidization settling tank with a water inlet and a water outlet, a power water pump for enabling water flow in the fluidization settling tank and the water supply pipe to circularly flow is connected between the water inlet and the water outlet in series through a water supply pipe, circulating water flow in the fluidization settling tank flows along a single horizontal direction, the sample injection mixer is communicated with the water supply pipe, a plurality of groups of pulverized coal collection devices are arranged at the bottom of the fluidization settling tank, and the pulverized coal collection devices are sequentially arranged along the flowing direction of the circulating water flow in the fluidization settling tank. The pulverized coal fluidization settling separation device can be used for separating small-batch pulverized coal samples in a laboratory, is convenient to operate, has high automation degree and high separation precision and accuracy, and does not generate dangerous waste.)

1. The utility model provides a buggy fluidization sedimentation separator which characterized in that: including the fluidization sedimentation tank that is used for thoughtlessly establishing the appearance blending machine of advancing of buggy appearance and water and has water inlet and delivery port, the water inlet with be used for making through feed pipe series connection between the delivery port fluidization sedimentation tank with the power water pump of the rivers circulation flow in the feed pipe, circulation rivers in the fluidization sedimentation tank flow along single horizontal direction, advance the appearance blending machine with the feed pipe intercommunication, the bottom of fluidization sedimentation tank is provided with multiunit buggy collection device, each group buggy collection device is followed the flow direction of circulation rivers sets gradually in the fluidization sedimentation tank.

2. The pulverized coal fluidization settling separation apparatus as set forth in claim 1, characterized in that: the water inlet and the water outlet are respectively arranged on two opposite side walls of the fluidized settling tank, and the water inlet and the water outlet are positioned at the same height position on the fluidized settling tank.

3. The pulverized coal fluidization settling separation apparatus as set forth in claim 1, characterized in that: the water inlet with through there is first flow control valve still series connection between the delivery port through the feed pipe, first flow control valve sets up power water pump with between the water inlet, and be close to the power water pump sets up.

4. The pulverized coal fluidization settling separation apparatus as set forth in claim 1, characterized in that: the coal dust collecting device comprises a coal dust collecting barrel detachably arranged at the bottom of the fluidization sedimentation tank and a drain valve arranged at the bottom of the coal dust collecting barrel, and filter cotton or filter paper is arranged on the drain valve.

5. The pulverized coal fluidization settling separation apparatus as set forth in claim 1 or 4, characterized in that: the pulverized coal collecting device is at least provided with three groups.

6. The pulverized coal fluidization settling separation apparatus as set forth in claim 1, characterized in that: buggy fluidization settlement separator still including be used for with the agitating unit who advances buggy appearance and water stirring in the appearance blending machine, agitating unit is including setting up magnetic stirrers in the appearance blending machine is in with the setting advance the outer magnetic stirrers of appearance blending machine, magnetic stirrers with magnetic stirrers connects in order to drive magnetic stirrers rotates, magnetic stirrers is located advance the below of appearance blending machine.

7. The pulverized coal fluidization settling separation apparatus as set forth in claim 1, characterized in that: and the sample injection mixer is communicated with the water supply pipe through a second flow regulating valve.

8. The pulverized coal fluidization settling separation apparatus as set forth in claim 1, characterized in that: the power water pump is positioned on the water supply pipe at a position close to the water outlet.

9. A coal dust fluidization settling separation method is characterized in that: the separation method comprises the following steps:

(1) feeding the coal dust sample into a sample feeding mixer filled with water, and uniformly stirring to form coal dust sample suspension;

(2) feeding the pulverized coal sample suspension into a water feeding pipe with a set circulating water flow speed, wherein the circulating water flow in the water feeding pipe carries the pulverized coal sample suspension fed into the water feeding pipe to flow at the set circulating water flow speed, and enters a fluidized settling tank from a water inlet of the fluidized settling tank;

(3) the coal powder sample suspension flows in the fluidized settling tank along a single horizontal direction under the carrying of circulating water flow, and the coal powder sample falls under the action of gravity in the flowing process and sequentially falls into each coal powder collecting device arranged at the bottom of the fluidized settling tank side by side according to the sequence of the density from large to small, so that the separation of the coal powder sample is realized;

(4) and circulating water flows through the fluidized settling tank and flows out of a water outlet of the fluidized settling tank to the water supply pipe to continue circulating flow.

10. The coal fines fluidization settling separation method according to claim 9, characterized in that: the circulating water flow speed in the fluidization sedimentation tank can be adjusted through a power water pump and a first flow regulating valve which are arranged on the water supply pipe in series.

Technical Field

The invention relates to the technical field of coal dust separation, in particular to a fluidization settling separation device and a separation method for coal dust samples, which are used for sample separation for analyzing the physical and chemical characteristics of the coal dust samples with different density levels in the coal dust samples, and are particularly suitable for density separation of small-batch coal dust samples in a laboratory.

Background

In the processes of trade settlement, combustion research, clean utilization and the like of coal, one or more parameters of parameters such as calorific value, industrial analysis, element analysis, combustion characteristics, coal ash components and the like of the coal need to be analyzed, and the coal is prepared into a coal dust sample with the granularity of less than 0.2mm before analysis. The coal dust particles are composed of mineral substances, organic substances, water and the like, and the density difference of the coal dust particles is caused by the self-nonuniformity of coal, so that the density of the coal dust particles containing more mineral substances is large. Different coal powder particle components have different properties, and when researches such as coal combustion and the like are carried out more deeply, the physicochemical characteristics of coal powder need to be analyzed according to coal powder with different density levels, so that coal powder samples need to be separated according to the density.

At present, the coal powder separation technology is mainly used for separating coarse coal powder and fine coal powder before combustion of a boiler of a coal-fired thermal power plant, belongs to a large-scale separation technology applied to industry, and is also related to relevant documents and patents. For example, 8 kinds of dense-thin coal powder separators such as an impact-type dense-thin coal powder separator, a louver dense-thin coal powder separator, and a fin-type dense-thin coal powder separator, which are used in a utility boiler, are disclosed in "shallow talk dense-thin coal powder separator and application thereof" of volume 12 of the power plant system engineering 1998; also, for example, chinese patent publication No. CN2911455Y, 6.13.2007 discloses a boiler pulverized coal separator, which is used for separating pulverized coal of a power station boiler to improve combustion efficiency; also, as disclosed in chinese patent No. CN206262667U, published as 2017, 06, 20, a pulverized coal separation and concentration integrated device for pulverized coal boiler is disclosed, which can crush and separate pulverized coal and compress pulverized coal.

In the field of ore processing technology research, a small batch of coal dust samples are separated into samples with different densities through a small float-sink test. The method is used for understanding the coal density distribution rule and evaluating the selectivity of the coal. The principle is that zinc chloride, carbon tetrachloride and other heavy liquids with different relative densities are used to prepare heavy liquid, and the coal powder with the density higher than that of the heavy liquid is added into the heavy liquid and sinks to the bottom of the heavy liquid to achieve the separation purpose. The process is complex in operation, low in automation degree, low in separation efficiency and not beneficial to occupational health of workers, and medicines have certain toxicity.

At present, a pulverized coal fluidization settling separation device and a separation method thereof which can be used for small-batch coal powder sample separation in a laboratory, are convenient to operate, have high automation degree, improve separation precision and accuracy and do not generate dangerous waste do not exist.

Disclosure of Invention

The invention aims to solve the technical problem of providing the pulverized coal fluidization settling separation device for efficiently separating small-batch pulverized coal in a laboratory, which has the advantages of reasonable design, unique concept, capability of effectively separating pulverized coal samples with different densities, simplicity and convenience in operation, high automation degree, reliable separation precision and accuracy, and environmental and occupational health friendliness.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a buggy fluidization sedimentation separator, including the fluidization sedimentation basin that is used for thoughtlessly establishing the appearance blending machine of advancing of buggy appearance and water and has water inlet and delivery port, the water inlet with be used for making through feed pipe series connection between the delivery port fluidization sedimentation basin with the power water pump of the rivers circulation flow in the feed pipe, circulation rivers in the fluidization sedimentation basin flow along single horizontal direction, advance the appearance blending machine with the feed pipe intercommunication, the bottom of fluidization sedimentation basin is provided with multiunit buggy collection device, each group buggy collection device is followed the flow direction of circulation rivers sets gradually in the fluidization sedimentation basin.

Preferably, the water inlet and the water outlet are respectively arranged on two opposite side walls of the fluidized settling tank, and the water inlet and the water outlet are located at the same height position on the fluidized settling tank.

Preferably, a first flow regulating valve is connected between the water inlet and the water outlet in series through the water supply pipe, and the first flow regulating valve is arranged between the power water pump and the water inlet and is close to the power water pump.

Preferably, the pulverized coal collecting device comprises a pulverized coal collecting cylinder detachably arranged at the bottom of the fluidization sedimentation tank and a drain valve arranged at the bottom of the pulverized coal collecting cylinder, and filter cotton or filter paper is arranged on the drain valve.

Preferably, the pulverized coal collecting device is provided with at least three groups.

Preferably, separator still including be used for with the agitating unit of buggy appearance and water stirring in the appearance blending machine advances, agitating unit is including setting up magnetic stirrers in the appearance blending machine advances with set up and be in advance the outer magnetic stirrers of appearance blending machine, magnetic stirrers with magnetic stirrers connects in order to drive magnetic stirrers rotates, magnetic stirrers is located advance the below of appearance blending machine.

Preferably, the sample injection mixer is communicated with the water supply pipe through a second flow regulating valve.

Preferably, the power water pump is positioned on the water supply pipe at a position close to the water outlet.

The invention also provides a coal powder fluidization settling separation method, which comprises the following steps:

(1) feeding the coal dust sample into a sample feeding mixer filled with water, and uniformly stirring to form coal dust sample suspension;

(2) feeding the pulverized coal sample suspension into a water feeding pipe with a set circulating water flow speed, wherein the circulating water flow in the water feeding pipe carries the pulverized coal sample suspension fed into the water feeding pipe to flow at the set circulating water flow speed, and enters a fluidized settling tank from a water inlet of the fluidized settling tank;

(3) the coal powder sample suspension flows in the fluidized settling tank along a single horizontal direction under the carrying of circulating water flow, and the coal powder sample falls under the action of gravity in the flowing process and sequentially falls into each coal powder collecting device arranged at the bottom of the fluidized settling tank side by side according to the sequence of the density from large to small, so that the separation of the coal powder sample is realized;

(4) and circulating water flows through the fluidized settling tank and flows out of a water outlet of the fluidized settling tank to the water supply pipe to continue circulating flow.

Preferably, the circulating water flow speed in the fluidized settling tank can be adjusted through a power water pump and a first flow regulating valve which are arranged on the water supply pipe in series.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the pulverized coal fluidization settling separation device can be used for separating small-batch pulverized coal samples in a laboratory, is convenient to operate, has high automation degree and high separation precision and accuracy, and does not generate dangerous waste.

Drawings

Fig. 1 is a schematic structural diagram of a pulverized coal fluidization settling separation device in an embodiment of the invention.

In the figure: 1. a sample feeding and mixing device; 21. a magnetic stirrer; 22. a magnetic stirrer; 3. a fluidized settling tank; 31. a water inlet; 32. a water outlet; 4. a power water pump; 5. a water supply pipe; 6. a first flow regulating valve; 7. a second flow regulating valve; 81. a pulverized coal collection cylinder; 82. and (4) draining the water valve.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.

Examples

Referring to fig. 1, the coal dust fluidization settling separation device in this example includes a sample injection mixer 1, a stirring device, a fluidization settling tank 3, a power water pump 4, a water supply pipe 5, and a coal dust collection device.

Filling purified water into the sample blending device 1, adding the coal powder sample into the sample blending device 1, mixing with water, and stirring by a stirring device to form a uniform coal powder sample suspension in the water.

The stirring device comprises a magnetic stirrer 21 and a magnetic stirrer 22. The magnetic stirrer 21 is arranged inside the sample blending device 1, and the magnetic stirrer 22 is arranged outside the sample blending device 1. Magnetic stirrers 21 and magnetic stirrers 22 are connected, and when magnetic stirrers 2 started, drive magnetic stirrers 21 and rotate in the inside of appearance blending machine 1 and stir to establish the homogeneity with the buggy sample and water mixture.

In this embodiment, the magnetic stirrer 22 is disposed below the sample mixer 1, and the magnetic stirrer 21 extends into the sample mixer 1 from the lower end of the sample mixer 1.

The fluidized settling tank 3 is provided with a water inlet 31 and a water outlet 32, the water inlet 31 is communicated with the water outlet 32 through a water supply pipe 5, and a power water pump 4 is connected between the water inlet 31 and the water outlet 32 in series through the water supply pipe 5. The power water pump 4 can provide water flow power, so that a circulating water flow is formed in the fluidized settling tank 3 and the water supply pipe 4.

The power water pump 4 is located on the water supply pipe 5 at a position close to the water outlet 32 of the fluidized settling tank 3, so that the circulating water flows in the water supply pipe 5 at a set circulating water flow speed, enters the fluidized settling tank 3 from the water inlet 31, flows through the fluidized settling tank 3, flows out of the fluidized settling tank 3 from the water outlet 32, and flows into the water supply pipe 5, and thus circulates.

The water inlet 31 and the water outlet 32 are both arranged at the upper part of the fluidized settling tank 3, the water inlet 31 and the water outlet 32 are respectively arranged on two opposite side walls of the fluidized settling tank 3, and the water inlet 31 and the water outlet 32 are positioned at the same height position on the fluidized settling tank 3. This maintains the horizontal flow of the circulating water in the fluidized settling tank 3. Preferably, the water inlet 31 and the water outlet 32 are symmetrically arranged.

The pulverized coal fluidization settling separation device further comprises a first flow regulating valve 6 which is arranged between the water inlet 31 and the power water pump 4 in series through a water supply pipe 5, and the first flow regulating valve 6 is arranged close to the power water pump 4. The flow of the circulating water flow in the fluidized settling tank 3 and the water supply pipe 5 can be controlled together by the power water pump 4 and the first flow regulating valve 6, so that the flow speed of the circulating water flow is controlled.

The sample injection mixer 1 is communicated with the water supply pipe 5, so that the coal powder sample suspension in the sample injection mixer 1 can enter the water supply pipe 5 and flows into the fluidized settling tank 3 to be separated by the coal powder sample carried by the circulating water flow in the water supply pipe 5.

The sample blending device 1 is communicated with the water supply pipe 5 through a second flow regulating valve 7, and the pulverized coal sample suspension in the sample blending device 1 can be released into the water supply pipe 5 through the second flow regulating valve 7, and the release speed of the pulverized coal sample suspension can be regulated.

The pulverized coal collecting device is used for collecting pulverized coal samples, the pulverized coal collecting device is arranged at the bottom of the fluidization sedimentation tank 3, the pulverized coal collecting device is provided with a plurality of groups, and the pulverized coal collecting devices of each group are sequentially arranged along the flowing direction of the circulating water flow in the fluidization sedimentation tank 3.

When the coal powder sample suspension flows into the fluidized settling tank 3 under the carrying of circulating water flow in the water supply pipe 5, the coal powder sample suspension flows in the fluidized settling tank 3 along the horizontal direction along with the circulating water flow, and in the flowing process of the coal powder sample suspension, the coal powder sample can settle down under the action of self gravity, coal powder sample particles with high density settle down at first, coal powder sample particles with low density settle down at a delayed time, so that the coal powder sample particles are separated under the action of circulating water flow horizontal movement force, and the coal powder sample particles sequentially fall into the coal powder collecting devices from high density to low density.

The pulverized coal collecting device is at least provided with three groups. In this embodiment, three groups of pulverized coal collecting devices are arranged at the bottom of the fluidized settling pond 3, the three groups of pulverized coal collecting devices are sequentially a first group of pulverized coal collecting devices, a second group of pulverized coal collecting devices and a third group of pulverized coal collecting devices along the flowing direction of circulating water flow, the pulverized coal sample particles with large density fall into the first group of pulverized coal collecting devices, the pulverized coal sample particles with medium density fall into the second group of pulverized coal collecting devices, and the pulverized coal sample particles with small density fall into the third group of pulverized coal collecting devices.

Each group of coal dust collecting devices comprises a coal dust collecting cylinder 81 and a water drain valve 82, the coal dust collecting cylinder 81 is detachably arranged at the bottom of the fluidization sedimentation tank 3, and the water drain valve 82 is arranged at the bottom of the coal dust collecting cylinder 81. After the coal powder sample is settled in each coal powder collecting cylinder 81, each drain valve 82 is opened to drain water in each coal powder collecting cylinder 81, each coal powder collecting cylinder 81 is taken down, and the coal powder sample in each coal powder collecting cylinder 81 is collected and dried respectively.

The drainage valve 82 is provided with filter cotton or filter paper to prevent the coal dust sample from being discharged along with water flow in the drainage process.

The separation method for separating the coal dust sample by the coal dust fluidization settling separation device comprises the following steps:

(1) filling purified water into the sample blending device 1, adding the coal powder sample into the sample blending device 1, starting the magnetic stirrer 3, driving the magnetic stirrer 2 to rotate for stirring, and enabling the coal powder sample to form uniform coal powder sample suspension in water.

(2) And (3) adjusting a second flow regulating valve 7 to release the coal powder sample suspension in the sample blending device 1, so that the coal powder sample suspension enters a water supply pipe 5 with a set circulating water flow speed, and the circulating water flow in the water supply pipe 5 carries the coal powder sample suspension entering the water supply pipe to flow at the set circulating water flow speed and enters the fluidized settling tank 3 from a water inlet 31 of the fluidized settling tank 3.

The flow rate of the circulating water flow in the fluidized settling tank 3 and the water supply pipe 5 is controlled by the power water pump 4 and the first flow regulating valve 6.

(3) The coal powder sample suspension flows in the fluidization settling tank 3 along a single horizontal direction under the carrying of circulating water flow, and in the flowing process, the coal powder sample falls under the action of self gravity, the coal powder sample particles with large density fall firstly, and the coal powder sample particles with small density fall in a delayed sedimentation mode, so that the coal powder sample is separated under the action of the horizontal movement force of the circulating water flow, and the coal powder sample particles sequentially fall into each coal powder collecting device arranged at the bottom of the fluidization settling tank 3 side by side according to the sequence of the densities from large to small, and the separation of the coal powder sample is realized.

(4) The circulating water flow flows through the fluidized settling tank 3 and flows out of the water outlet 32 of the fluidized settling tank 3 to the water supply pipe 5 to continue circulating flow.

(5) After the coal powder sample is settled in each coal powder collecting cylinder 81, each drain valve 82 is opened, water in each coal powder collecting cylinder 81 is drained, each coal powder collecting cylinder 81 is taken down, and the coal powder sample in the coal powder collecting cylinders is collected and dried respectively.

The buggy fluidization settlement separation device in this embodiment uses the pure water as the carrier, utilize buggy sample granule self gravity and the effect of circulating water flow horizontal thrust, can carry out fluidization settlement separation to the buggy sample granule of different density, this buggy fluidization settlement separation device has overcome the ore processing field and has adopted a large amount of poisonous and harmful substance and the polluted environment that little float and sink separation relates to and harm the drawback that the staff is healthy, the degree of automation and the separation precision and the degree of accuracy of separation have been promoted, and can be according to the meticulous degree of separation, increase buggy collection device's quantity, good scalability and spreading value have.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.