CN210090363U

CN210090363U - Device for measuring content of chlorine and sulfur in biomass

Info

Publication number: CN210090363U
Application number: CN201920317870.XU
Authority: CN
Inventors: 陈凡敏; 王嘉瑞; 张磊; 王莉莉; 胡贤辉; 李伟峰; 王光普; 覃涛; 李小江
Original assignee: Huadian Electric Power Research Institute Co Ltd
Current assignee: Huadian Electric Power Research Institute Co Ltd
Priority date: 2019-03-13
Filing date: 2019-03-13
Publication date: 2020-02-18
Anticipated expiration: 2029-03-13

Abstract

The utility model relates to a device of chlorine and sulphur content in survey living beings belongs to chlorine and sulphur content detection technical field in the biomass fuel. The device comprises a full-automatic continuous sample injector, a combustion pipe, a high-temperature furnace, a flow meter, an air supply pump, an electronic three-way valve, a chlorine electrolytic cell, a sulfur electrolytic cell, an air pump, a coulometric analyzer control system and the like; the method is suitable for detecting and analyzing chlorine and sulfur in the biomass fuel. The utility model discloses can realize quick, accurate and high-efficient survey of chlorine and sulphur content in the living beings.

Description

Device for measuring content of chlorine and sulfur in biomass

Technical Field

The utility model relates to a device of chlorine and sulphur content in survey living beings belongs to chlorine and sulphur content detection technical field in the biomass fuel.

Background

The biomass is rich in chlorine, and in the thermochemical conversion process of the biomass, part of the chlorine is released to a gas phase, so that the problems of dust deposition, blockage, corrosion and the like of equipment are caused, the stable and long-period operation of the equipment is influenced, and the environmental pollution problems of acid rain, dust and the like are caused if the chlorine is discharged to the atmosphere. Meanwhile, the existence of chlorine is a source for forming highly toxic dioxin in the thermochemical conversion process. Therefore, it is necessary to establish an accurate and reliable method for measuring chlorine in biomass, provide accurate chlorine content data, and guide and control the combustion process and procedure.

With the continuous increase of the current environmental pressure, the sulfur and ash content of the biomass is low, but the sulfur discharge amount per unit calorific value after conversion does not have advantages in consideration of the lower calorific value of the biomass fuel. Especially, with the proposal of domestic ultra-low emission concept, the sulfur emission in the combustion process of biomass briquette is not ignored.

At present, domestic standards and methods for measuring chlorine and sulfur in biomass mainly comprise: GB/T30729-; CN 103472146A is a method for measuring the content of chloride ions and negative ions in solid biomass fuel, adopts hydrothermal extraction-ion chromatography, and has the problems of high operation requirement, low automation degree and long time consumption. The GB/T28732-2012 solid biomass fuel total sulfur determination method specifies that the Eschka method and the coulometric titration method are used for determining the total sulfur in biomass, wherein the coulometric method is mature in equipment, stable and reliable in result and is widely applied to power generation enterprises burning coal and biomass.

Therefore based on above background, the utility model provides a device of chlorine and sulphur content in can simultaneous determination living beings, the device has increased living beings chlorine content's survey function on coulometer sulphur measurement's basis, and equipment degree of automation is high, detection speed is fast, the testing result is reliable and stable, the function is diversified, promotes in power generation enterprise easily, has wide prospect.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the not enough of existence in the chlorine determination technique in the current coal to and combine coulomb sulfur meter's universality and suitability, and provide a structural design is reasonable, and analysis sample is extensive, easily production and popularization, can effectively promote the analysis and detection device of chlorine and sulphur content in power plant and scientific research unit to living beings.

The utility model provides a technical scheme that above-mentioned problem adopted is: a device for measuring the content of chlorine and sulfur in biomass is characterized by comprising a full-automatic continuous sample injector, a combustion pipe, a high-temperature furnace, a first flow meter, a gas supply pump, an electronic three-way valve, a chlorine electrolytic cell, a sulfur electrolytic cell, a second flow meter, a gas suction pump and a coulometric analyzer control system; the full-automatic continuous sample injector is communicated with the combustion pipe and is used for conveying a sample to be analyzed into the combustion pipe, the air supply pump is connected with the first flow meter, the first flow meter is communicated with an inlet of the combustion pipe, the high-temperature furnace is arranged outside the combustion pipe and is used for heating the combustion pipe, an outlet of the combustion pipe is connected with the electronic three-way valve through a pipeline, the electronic three-way valve is connected with an inlet of the chlorine electrolytic cell and an inlet of the sulfur electrolytic cell through pipelines, an outlet of the chlorine electrolytic cell and an outlet of the sulfur electrolytic cell are connected with the second flow meter through pipelines, the second flow meter is connected with the air suction pump through a pipeline, and the chlorine electrolytic cell and the sulfur electrolytic cell are both connected with the coulometric analyzer control system.

Preferably, the high temperature furnace can heat the combustion pipe in sections, the temperature near the inlet of the combustion pipe is kept at 500 ℃, and the temperature in the middle of the combustion pipe is kept at 1150 ℃.

Preferably, when the content of chlorine in the biomass is measured, the electronic three-way valve is communicated with the chlorine electrolytic cell, and the electronic three-way valve is used for introducing all combustion product gas into the chlorine electrolytic cell; when the sulfur content in the biomass is measured, the electronic three-way valve is communicated with the sulfur electrolytic cell, and the electronic three-way valve is used for completely introducing combustion product gas into the sulfur electrolytic cell.

Coulomb analyzer control system can consume iodine simple substance or Ag in electrolyte in combustion product gas reaction⁺When the potential of the measuring electrode of the electrolytic cell changes, corresponding electrolytic voltage is respectively supplied to the electrodes of the chlorine or sulfur electrolytic cell, and iodine simple substance or Ag is electrolyzed on the electrodes⁺Until iodine simple substance or Ag in electrolytic cell⁺The original concentration is recovered, the coulometric analyzer control system detects the electric quantity consumed in the electrolytic process, and calculates the iodine simple substance or Ag consumed by the reaction of the combustion product gas⁺To obtain the concentration of chlorine or sulfur in the biomass.

Preferably, the first flow meter can adjust the flow rate of the air supply pump to 1500ml/min, and the second flow meter can adjust the flow rate of the air suction pump to 1000 ml/min.

Preferably, the chlorine cell comprises a measurement-reference electrode pair for detecting changes in silver ion concentration, and an electrolysis anode-electrolysis cathode pair for maintaining silver ion concentration; reference electrode: the measurement electrode is formed by inserting silver-plated platinum wires into saturated silver acetate electrolyte: the electrolytic anode consists of a platinum sheet and a platinum wire, wherein the platinum sheet is plated with silver and then with a layer of uniform silver chloride, and the electrolytic anode is characterized in that: the electrolytic cathode is composed of a platinum sheet and a platinum wire, wherein a layer of uniform silver chloride is plated on the platinum sheet after silver plating, and the electrolytic cathode comprises: is composed of a spirally wound platinum wire. The sulfur electrolysis cell includes a platinum electrolysis electrode pair and a platinum indicator electrode pair.

Compared with the prior art, the utility model, have following advantage and effect: 1. the device has wide application range and is suitable for biomass fuel. 2. Can meet the detection requirements of chlorine and sulfur content and realize multiple purposes. 3. The detection precision of the content of chlorine and sulfur in the biomass is high, and the detection content range is wide. 4. The automation degree is high, the operation is simple, and the detection speed is high. 5. Simple structure, reasonable design, scientific layout, unique concept, convenient use and easy production and popularization.

Drawings

FIG. 1 is a schematic structural diagram of a device for measuring the content of chlorine and sulfur in biomass in the embodiment of the present invention.

In the figure: the device comprises a full-automatic continuous sample injector 1, a combustion pipe 2, a high-temperature furnace 3, a first flowmeter 4, an air supply pump 5, an electronic three-way valve 6, a chlorine electrolytic cell 7, a sulfur electrolytic cell 8, a second flowmeter 9, an air suction pump 10 and a coulometric analyzer control system 11.

Detailed Description

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

Examples are given.

Referring to fig. 1, the apparatus for determining the content of chlorine and sulfur in biomass in the embodiment includes a full-automatic continuous sample injector 1, a combustion pipe 2, a high-temperature furnace 3, a first flow meter 4, a gas supply pump 5, an electronic three-way valve 6, a chlorine electrolytic cell 7, a sulfur electrolytic cell 8, a second flow meter 9, a gas extraction pump 10 and a coulometric analyzer control system 11.

Full-automatic continuous sample injector 1 communicates with combustion tube 2, and full-automatic continuous sample injector 1 is used for inciting somebody to action the sample of waiting to analyze and sends into combustion tube 2 in, air feed pump 5 is connected with flowmeter 4, flowmeter 4 communicates with the entry of combustion tube 2, high temperature furnace 3 sets up the outside at combustion tube 2, and high temperature furnace 3 is used for heating combustion tube 2, the export of combustion tube 2 is connected with electronic three-way valve 6 through the pipeline, electronic three-way valve 6 is connected with the entry of chlorine electrolytic bath 7 and the entry of sulphur electrolytic bath 8 through the pipeline, the export of chlorine electrolytic bath 7 and the export of sulphur electrolytic bath 8 are connected with flowmeter 9 No. two through the pipeline, flowmeter 9 No. two is connected with aspiration pump 10 through the pipeline, chlorine electrolytic bath 7 and sulphur electrolytic bath 8 all are connected with coulomb analyzer control system 11.

The operation process of this embodiment is as follows:

the full-automatic continuous sample injector 1 continuously feeds the porcelain boat containing the samples into and out of the combustion tube 2 through the sample feeding rod, air-dried biomass (0.05 +/-0.005) g with the granularity of less than 0.2mm is weighed in the porcelain boat, and a layer of tungsten trioxide is covered on the biomass. The high temperature furnace 3 heats the combustion pipe 2 so that the temperature near the inlet of the combustion pipe 2 is maintained at 500 ℃ and the temperature in the middle of the combustion pipe 2 is maintained at 1150 ℃. An air supply pump 5 supplies 1500ml/min of air to the combustion tube 2 through a first flow meter 4, so that the sample is ensured to be fully combusted in the combustion tube 2; when the content of chlorine in the biomass is measured, the combustion product gas is completely led into a chlorine electrolytic cell 7 by an electronic three-way valve 6, and when the content of sulfur in the biomass is measured, the combustion product gas is completely led into a sulfur electrolytic cell 8, the electrolyte in the chlorine electrolytic cell 7 is prepared by mixing 300ml of pure water and 700ml of glacial acetic acid, the electrolyte in the sulfur electrolytic cell 8 is prepared by dissolving 5g of potassium iodide and 5g of potassium bromide in (250-300) ml of pure water respectively, and adding 10ml of glacial acetic acid into the solution. The coulometer control system 11 consumes iodine simple substance or Ag in electrolyte in the combustion product gas reaction⁺When the potential of the measuring electrode of the electrolytic cell changes, corresponding electrolytic voltage is respectively supplied to the electrode of the chlorine electrolytic cell 7 or the electrode of the sulfur electrolytic cell 8, the coulometric analyzer control system 11 detects the consumed electric quantity in the electrolytic process, and the iodine simple substance or Ag consumed by the reaction of the combustion product gas is calculated⁺To obtain the concentration of chlorine or sulfur in the biomass; the air exhaust flow of the second flowmeter 9 is 1000 ml/min.

And will be apparent to those skilled in the art from the foregoing description.

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 example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A device for measuring the content of chlorine and sulfur in biomass is characterized by comprising a full-automatic continuous sample injector (1), a combustion pipe (2), a high-temperature furnace (3), a first flowmeter (4), a gas supply pump (5), an electronic three-way valve (6), a chlorine electrolytic cell (7), a sulfur electrolytic cell (8), a second flowmeter (9), an air suction pump (10) and a coulometric analyzer control system (11); the full-automatic continuous sample injector (1) is communicated with the combustion pipe (2), the full-automatic continuous sample injector (1) is used for sending a sample to be analyzed into the combustion pipe (2), the air supply pump (5) is connected with the first flow meter (4), the first flow meter (4) is communicated with the inlet of the combustion pipe (2), the high-temperature furnace (3) is arranged outside the combustion pipe (2), the high-temperature furnace (3) is used for heating the combustion pipe (2), the outlet of the combustion pipe (2) is connected with the electronic three-way valve (6) through a pipeline, the electronic three-way valve (6) is connected with the inlet of the chlorine electrolytic cell (7) and the inlet of the sulfur electrolytic cell (8) through a pipeline, the outlet of the chlorine electrolytic cell (7) and the outlet of the sulfur electrolytic cell (8) are connected with the second flow meter (9) through a pipeline, the second flow meter (9) is connected with the air extracting pump (10) through a pipeline, the chlorine electrolytic cell (7) and the sulfur electrolytic cell (8) are both connected with a coulometric analyzer control system (11).

2. The device for measuring the chlorine and sulfur content in the biomass according to claim 1, wherein when the chlorine content in the biomass is measured, the electronic three-way valve (6) is communicated with the chlorine electrolytic cell (7), and the electronic three-way valve (6) is used for completely introducing the combustion product gas into the chlorine electrolytic cell (7); when the sulfur content in the biomass is measured, the electronic three-way valve (6) is communicated with the sulfur electrolytic cell (8), and the electronic three-way valve (6) is used for completely introducing combustion product gas into the sulfur electrolytic cell (8).

3. The apparatus for determining the chlorine and sulfur content of biomass according to claim 1, characterized in that said chlorine cell (7) comprises a measuring-reference electrode pair, which detects the change of silver ion concentration, and an electrolytic anode-electrolytic cathode pair, which maintains the silver ion concentration; the sulfur electrolysis cell (8) comprises a platinum electrolysis electrode pair and a platinum indicator electrode pair.