阅读说明：本技术 测定粉煤中硫化氢挥发量的装置和方法 (Device and method for measuring volatilization amount of hydrogen sulfide in pulverized coal ) 是由 王大鹏 王宪勇 李创民 管跃荣 于 2020-09-16 设计创作，主要内容包括：本申请包括一种测定粉煤中硫化氢挥发量的装置,其结构包括如下特征：由管路连接并组成循环回路的反应室、旋风分离器；其中反应室顶部通过管路连接旋风分离器的含尘空气进口,旋风分离器底部的颗粒物出口通过管路连接至反应室底部；所述反应室设置有样品入口和硫化氢检测口；所述旋风分离器的清洁气体出口通过管路经过连接风机后连接至反应室底部；风机与反应室之间的管路上设置有加热装置；所述旋风分离器-风机-反应器沿途管路上设置有加水口。还包括与上述装置相对应的测试方法。本申请具备在封闭环境下连续循环、连续测试,气体无外排,测试结果精确；减少粉煤自身对于硫化氢气体的吸附,提高精度等优点。(The application includes a device of hydrogen sulfide volatilization volume in survey fine coal, and its structure includes following characteristic: a reaction chamber and a cyclone separator which are connected by pipelines and form a circulation loop; wherein the top of the reaction chamber is connected with a dust-containing air inlet of the cyclone separator through a pipeline, and a particulate matter outlet at the bottom of the cyclone separator is connected to the bottom of the reaction chamber through a pipeline; the reaction chamber is provided with a sample inlet and a hydrogen sulfide detection port; a clean gas outlet of the cyclone separator is connected to the bottom of the reaction chamber after passing through a connecting fan through a pipeline; a heating device is arranged on a pipeline between the fan and the reaction chamber; and a water filling port is arranged on a pipeline along the cyclone separator-fan-reactor. The device also comprises a testing method corresponding to the device. The method has the advantages that continuous circulation and continuous testing are realized in a closed environment, no gas is discharged, and the testing result is accurate; the adsorption of the pulverized coal to the hydrogen sulfide gas is reduced, and the precision is improved.)

1. The utility model provides a device of hydrogen sulfide volatilization volume in survey fine coal which characterized in that:

the method comprises the following steps:

a reaction chamber and a cyclone separator which are connected by pipelines and form a circulation loop; wherein the top of the reaction chamber is connected with a dust-containing air inlet of the cyclone separator through a pipeline, and a particulate matter outlet at the bottom of the cyclone separator is connected to the bottom of the reaction chamber through a pipeline;

the reaction chamber is provided with a sample inlet and a hydrogen sulfide detection port;

a clean gas outlet of the cyclone separator is connected to the bottom of the reaction chamber after passing through a connecting fan through a pipeline;

a heating device is arranged on a pipeline between the fan and the reaction chamber;

and a water filling port is arranged on a pipeline along the cyclone separator-fan-reactor.

2. The apparatus for determining the volatilization amount of hydrogen sulfide in pulverized coal as set forth in claim 1, wherein: a thermometer and a pressure detection device are arranged in the reactor.

3. The apparatus for determining the volatilization amount of hydrogen sulfide in pulverized coal as set forth in claim 1, wherein: the water filling port is used for dropwise adding liquid water into the pipeline or conveying water vapor into the pipeline.

4. The apparatus for determining the volatilization amount of hydrogen sulfide in pulverized coal as set forth in claim 1, wherein: the reactor is a vertically arranged tubular structure, the bottom of the reactor is provided with a closable cleaning opening, and a pipeline between the particle outlet of the cyclone separator and the reaction chamber is provided with a bend.

5. The apparatus for determining the volatilization amount of hydrogen sulfide in pulverized coal as set forth in claim 1, wherein: and a dust filter screen is arranged between the cyclone separator and the fan.

6. The apparatus for determining the volatilization amount of hydrogen sulfide in pulverized coal as set forth in claim 1, wherein: the heating device is an electric heating device.

7. A method for measuring the volatilization amount of hydrogen sulfide in pulverized coal is characterized by comprising the following steps:

in the sealed space, the quantitative tested pulverized coal is driven to circularly move by airflow;

quantitatively dripping water or injecting water vapor into the sealed space;

and after the hydrogen sulfide gas is uniform, measuring the concentration of the hydrogen sulfide gas in the closed space.

8. The method for determining the volatilization amount of hydrogen sulfide in pulverized coal as claimed in claim 7, wherein: the pulverized coal-gas mixture in the sealed space is heated, and the concentration of hydrogen sulfide is measured for many times at different temperatures.

9. The method for determining the volatilization amount of hydrogen sulfide in pulverized coal as set forth in any one of claims 7 or 8, wherein: forming, by a gas-solid separation device, in the sealed space:

a pulverized coal circulation loop, wherein a pulverized coal-gas mixture circularly moves through a gas-solid separation device;

an air flow passage: and gas discharged by the gas-solid separation device is added with water, heated and then conveyed to the pulverized coal circulation loop through a fan.

10. The method for determining the volatilization amount of hydrogen sulfide in pulverized coal as claimed in claim 9, wherein: a cyclone is used as the gas-solid separation device.

The technical field is as follows:

the application belongs to the field of mining and harmful gas measurement and treatment, and particularly relates to a device for measuring the volatilization amount of hydrogen sulfide in pulverized coal and a measuring method related to the device.

Background art:

in the prior art, the volatilization amount of hydrogen sulfide in coal is mainly determined by chromatography, but the method is a concentration test method regardless of the process.

The hydrogen sulfide gas in the coal dust mainly comes from the hydrolysis of compounds such as calcium sulfide, zinc sulfide and the like, and is gradually reacted and released, and the volatilization degrees are different under the conditions of different temperatures, so that the accurate measurement of the hydrogen sulfide needs to control three factors of water content, temperature and circulating continuous measurement. On the other hand, the accumulated coal dust can cause the adsorption of hydrogen sulfide, which is a dialectical contradiction with the self-release of hydrogen sulfide, and in the prior art, the volatilization amount of the hydrogen sulfide in the coal is mainly measured by chromatography, but the method is a concentration test method without considering the process. The prior art is difficult to meet the requirement of detecting hydrogen sulfide with high precision (PPM level). At present, no special testing device and method exist, and technical requirements such as high testing precision, continuous cycle testing, adsorption avoidance and the like can be met.

The invention content is as follows:

the purpose of the invention is as follows:

the application aims to provide a special device and a testing method, the water content of coal is gradually improved by dripping water, and the adsorption influence of the coal on hydrogen sulfide is reduced by increasing temperature and circulating flow, so that a more accurate measurement result of the volatilization amount of the hydrogen sulfide of the coal powder is obtained.

The technical scheme is as follows:

the application includes a device of hydrogen sulfide volatilization volume in survey fine coal, and its structure includes following characteristic:

a reaction chamber and a cyclone separator which are connected by pipelines and form a circulation loop; wherein the top of the reaction chamber is connected with a dust-containing air inlet of the cyclone separator through a pipeline, and a particulate matter outlet at the bottom of the cyclone separator is connected to the bottom of the reaction chamber through a pipeline;

the reaction chamber is provided with a sample inlet and a hydrogen sulfide detection port;

a clean gas outlet of the cyclone separator is connected to the bottom of the reaction chamber after passing through a connecting fan through a pipeline;

a heating device is arranged on a pipeline between the fan and the reaction chamber;

and a water filling port is arranged on a pipeline along the cyclone separator-fan-reactor.

Preferably: a thermometer and a pressure detection device are arranged in the reactor.

Preferably: the water filling port is used for dropwise adding liquid water into the pipeline or conveying water vapor into the pipeline.

Preferably: the reactor is a vertically arranged tubular structure, the bottom of the reactor is provided with a closable cleaning opening, and a pipeline between the particle outlet of the cyclone separator and the reaction chamber is provided with a bend.

Preferably: and a dust filter screen is arranged between the cyclone separator and the fan.

Preferably: the heating device is an electric heating device.

The application also comprises a method for measuring the volatilization amount of the hydrogen sulfide in the pulverized coal, which is characterized by comprising the following steps:

in the sealed space, the quantitative tested pulverized coal is driven to circularly move by airflow;

quantitatively dripping water or injecting water vapor into the sealed space;

measuring the concentration of hydrogen sulfide gas in the enclosed space.

The above measurement method, preferably: the pulverized coal-gas mixture in the sealed space is heated, and the concentration of hydrogen sulfide is measured for many times at different temperatures.

Further: forming, by a gas-solid separation device, in the sealed space:

a pulverized coal circulation loop, wherein a pulverized coal-gas mixture circularly moves through a gas-solid separation device;

an air flow passage: and gas discharged by the gas-solid separation device is added with water, heated and then conveyed to the pulverized coal circulation loop through a fan.

Further: a cyclone is used as the gas-solid separation device.

The advantages and effects are as follows:

the device and the method have the following advantages:

continuous circulation and continuous test are carried out in a closed environment, no gas is discharged, and the test result is accurate;

the added water quantity and temperature can be adjusted, and the quantity of the gas generated by hydrolysis of the sample under different conditions can be tested;

the adsorption of the pulverized coal to the hydrogen sulfide gas is reduced, and the precision is improved.

The fan is an explosion-proof fan, and a gas heating device is arranged behind the fan, so that the system temperature is improved, and the physical adsorption quantity of coal and hydrogen sulfide is reduced.

Description of the drawings:

fig. 1 is a structural view of a test apparatus according to the present application.

The figure is marked with:

1, a reaction chamber; 2, a cyclone separator; 3, a fan; 4 a coal powder adding port; 5 a hydrogen sulfide detection port; 6, filtering a screen; 7, a water filling port; 8, a cleaning port; 9 a pressure monitor.

The arrows in the figure indicate the direction of air flow.

The specific implementation mode is as follows:

the hydrogen sulfide gas in the coal dust mainly comes from the hydrolysis of compounds such as calcium sulfide, zinc sulfide and the like, and is gradually reacted and released, and the volatilization degrees are different under the conditions of different temperatures, so that the accurate measurement of the hydrogen sulfide needs to control three factors of water content, temperature and circulating continuous measurement. On the other hand, the accumulated coal dust can cause the adsorption of hydrogen sulfide, which is in dialectical contradiction with the self-release of hydrogen sulfide, and the technical scheme of the application can weaken the contradiction between the two as much as possible.

The present application is illustrated below by means of several examples:

example 1

An apparatus for determining the amount of hydrogen sulfide volatilized out in pulverized coal, comprising:

a reaction chamber and a cyclone separator which are connected by pipelines and form a circulation loop; wherein the top of the reaction chamber is connected with a dust-containing air inlet of the cyclone separator through a pipeline, and a particulate matter outlet at the bottom of the cyclone separator is connected to the bottom of the reaction chamber through a pipeline; the structure enables the pulverized coal to be lifted by airflow to form a gas-solid mixture, the gas-solid mixture circularly flows in the device, and the release amount of hydrogen sulfide gas in the pulverized coal is continuously measured in a uniform state.

A clean gas outlet of the cyclone separator is connected to the bottom of the reaction chamber after passing through a connecting fan through a pipeline;

a heating device is arranged on a pipeline between the fan and the reaction chamber;

and a water filling port is arranged on a pipeline along the cyclone separator-fan-reactor.

The cyclone separator has the function of dividing the whole device into two parts, as shown in figure 1, the reaction chamber and the cyclone separator form a loop, and the pulverized coal only runs in the loop, wherein the pressure and the temperature are controlled and kept uniform, and the test precision is guaranteed. Because of the existence of the cyclone separator, another pure gas loop is formed, namely a gas outlet at the top of the cyclone separator is connected to a fan and is conveyed back to the reaction chamber, the loop does not contain pulverized coal, water is added and heating is carried out in the loop, the situations of agglomeration, wall hanging and the like caused by direct contact of water and pulverized coal are mainly avoided, the test is influenced, gas is heated instead of directly heating the pulverized coal, and the environment is heated more uniformly to ensure the test precision; the pulverized coal particles are prevented from passing through the fan, and the whole set of device is more reliable and easy to maintain.

The reaction chamber is provided with a sample inlet and a hydrogen sulfide detection port; the device is used for measuring after samples are put in and the device to be tested runs uniformly, and the inlet is sealed after the samples are put in, so that the testing precision is guaranteed.

Example 2

On the basis of embodiment 1, increase temperature and pressure measurement device in the reacting chamber, make the measurement of temperature, pressure, hydrogen sulfide concentration three all accomplish in the reacting chamber for the test is more accurate.

In the embodiments herein, the filler port adds liquid water or water vapor to the system.

Example 3

On the basis of embodiment 1, the reactor is a vertically arranged cylindrical structure, the bottom of the reactor is provided with a closable cleaning opening, and a pipeline between a particle outlet of the cyclone separator and the reaction chamber is provided with a bend. The bending function is to avoid the material pressure from dropping too fast.

In each of the above embodiments, a dust filter screen may be disposed between the cyclone separator and the fan. The heating means is preferably an electric heating means.

Example 4

The embodiment relates to a method for detecting hydrogen sulfide gas in pulverized coal, in particular to a method for detecting hydrogen sulfide gas in pulverized coal, which comprises the steps of driving quantitative detected pulverized coal to circularly move through airflow in a sealed space;

quantitatively dripping water or injecting water vapor into the sealed space;

measuring the concentration of hydrogen sulfide gas in the enclosed space.

The mechanism of action of the technical solution in this example is already elucidated in example 1 and will not be described further herein.

Example 5

On the basis of example 4, the pulverized coal-gas mixture in the sealed space was heated, and the hydrogen sulfide concentration was measured several times at different temperatures.

Example 6

On the basis of the embodiment 4 or 5, by the gas-solid separation device, the following components are formed in the sealed space:

a pulverized coal circulation loop, wherein a pulverized coal-gas mixture circularly moves through a gas-solid separation device;

an air flow passage: and gas discharged by the gas-solid separation device is added with water, heated and then conveyed to the pulverized coal circulation loop through a fan. Preferably, a cyclone is used as the gas-solid separation device.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.