Extraction type dust monitoring device in waste incineration power generation process

Abstract

The utility model relates to the field of dust monitoring devices, in particular to an extraction type dust monitoring device in a waste incineration power generation process, and aims to solve the technical problem that real-time monitoring cannot be realized due to the fact that dry-wet conversion needs to be carried out on flue gas in existing waste incineration dust detection. According to the technical scheme, the extraction type dust monitoring device in the waste incineration power generation process comprises a dust instrument, a sampler, a jet fan, a jet device, a dilution fan and a condensation module; according to the utility model, a gas flowing pipeline of the sampling detection equipment is heated, so that wet flue gas dust is dried into dry flue gas before detection, real-time monitoring can be realized, meanwhile, the flue gas exhausted after detection is subjected to heat absorption and cooling by utilizing the condensation module, and heat of the flue gas can be collected by virtue of an external waste heat boiler so as to be recycled, so that the detection efficiency is improved. The energy utilization efficiency is improved, and the problem that real-time monitoring cannot be achieved due to the fact that dry-wet conversion needs to be conducted on smoke in existing garbage combustion dust detection is solved.

Description

Technical Field

[0001] The utility model relates to the field of dust monitoring devices, in particular to an extraction type dust monitoring device for a garbage incineration power generation process. Background Art

[0002] Waste incineration power generation is a very popular power generation model that makes full use of domestic and industrial waste. However, waste incineration power generation also produces a large amount of dust. Therefore, it is necessary to strike a balance between power generation and dust generation during the waste incineration power generation process. This requires the use of monitoring methods to obtain dust generation in a timely manner during the waste incineration process.

[0003] The dust generated by garbage burning is wet flue gas dust. To measure it, the wet flue gas must be dried into dry flue gas first and then measured using the optical scattering principle. The current measurement method is to take it out manually, then transfer it to a drying bin for drying, and then use a laser scattering dust meter for dust detection. This timed sampling and detection method cannot achieve real-time dust quantity monitoring.

[0004] Therefore, in order to solve the problem that the existing garbage combustion dust detection cannot achieve real-time monitoring because of the need to convert the flue gas into wet and dry ones, a monitoring device can be designed to automatically extract and heat the converted flue gas and dust. The device can convert the wet flue gas into dry flue gas and wet flue gas and dust by dilution extraction and heating. The device has high measurement accuracy and requires little maintenance. Utility Model Content

[0005] In order to overcome the problem that existing garbage combustion dust detection cannot achieve real-time monitoring because it requires dry-wet conversion of flue gas.

[0006] The technical solution of the utility model is: an extraction type dust monitoring device for a waste incineration power generation process, comprising a dust meter, a sampler, a jet fan, an ejector, a dilution fan, and a condensation module; the sampler is fixed on the outer wall of a flue gas channel by bolt anchors, the dust meter is connected to the sampler by a pipeline, the jet fan and the ejector are connected to the dust meter by pipelines and are connected to the sampler, the dilution fan is connected to the sampler by a pipeline, the pipes on the jet fan and the ejector, and the pipes on the dilution fan are all heated by electric auxiliary heating equipment to pass through the flue gas, and the exhaust passages of the ejector and the dilution fan are connected to the condensation module.

[0007] Preferably, the technical solution adopts the SBF800 smoke system, and the optical sensor of the dust monitor is DURAG D-R800F, which measures the smoke concentration based on the forward scattering principle. The DR 800F laser diode is integrated on the measuring unit of the SBF 800 smoke system, and the modulated light penetrates the measuring tube. The light scattering of dust particles is mainly dispersed, so the receiving lens is positioned on the measuring probe of the dust monitor. The intensity of the scattered light is proportional to the dust concentration. Therefore, the more dust there is, the stronger the scattered light generated. The laser beam hits the dust to generate scattered light, which is transmitted to the photodiode through the receiving lens and its optical fiber for photoelectric conversion. The photodiode generates a current signal, which is processed by a microprocessor and converted into a dust measurement signal. The smoke after detection carries a large amount of heat due to the heating treatment. The condenser and the external waste heat boiler are used to cool the hot smoke and transfer the heat.

[0008] Preferably, a No. 1 gate valve is installed on the pipeline between the dust meter and the sampler, and a purge filter connected to the internal detection channel is installed on the dust meter. After the No. 1 gate valve is closed, the flue gas will not enter the dust meter from the sampler. After the heating temperature in the system reaches the preset value, the No. 1 gate valve opens automatically, and the mixed and diluted flue gas is sucked into the dust meter for detection through the negative pressure formed by the jet fan and the ejector.

[0009] Preferably, a No. 2 gate valve is installed on the pipe between the dilution fan and the sampler, and a branch pipe extending through the sampler and used for exhaust extends from the pipe between the dilution fan and the No. 2 gate valve. In the smoke detection state, the No. 2 gate valve is closed, the smoke will not flow from the sampler to the dilution fan, and the dilution fan stops inputting air flow. After opening the No. 2 gate valve, the dilution fan continuously delivers hot air flow to the sampling probe of the sampler, so that the smoke and the hot air flow are mixed, diluted and dried to form dry smoke.

[0010] Preferably, a flow meter and a recoil ball valve are installed on the branch pipe in sequence from the No. 2 gate valve to the dust monitor. The flow meter monitors the air flow output by the dilution fan and sends a signal to the control unit of the entire system, which feeds back to adjust the power of the dilution fan to ensure that the concentration of the diluted flue gas is at an appropriate detection concentration. The recoil ball valve is used to flush the pipe between the dilution fan and the sampler to remove accumulated smoke.

[0011] Preferably, the condensation module includes a dust collecting tray and an ascending cavity; the interior of the dust collecting tray is a funnel-shaped cavity structure, and a cylindrical ascending cavity is integrally formed at the upper end of the dust collecting tray. The detected flue gas enters the dust collecting tray. Since the temperature of the flue gas is high, it flows upward and accumulates in the ascending cavity. After the temperature drops, it will gradually sink into the dust collecting tray, and the dust particles contained in it will also gather along the funnel-shaped cavity structure to the middle of the bottom of the dust collecting tray.

[0012] Preferably, the condensation module includes a collecting port and an air inlet; an air inlet opened and closed by a rubber plug is provided in the middle of the lower end of the dust collecting tray, and the air inlet is used to be connected to a pipe opening for exhausting flue gas to guide the flue gas into the dust collecting tray. After opening the plug on the collecting port, the dust particles in the cooled flue gas can be removed.

[0013] Preferably, the condensation module also includes a condenser; the condenser is installed at the upper end of the rising chamber, and the condensing tube of the condenser is arranged in the rising chamber and connected to the waste heat boiler through an external circulating water pipe. The cold water in the condensing tube absorbs heat in the flue gas, and the flue gas temperature drops and deposits downward. The water after absorbing heat enters the waste heat boiler through the circulating pipe and is transferred to other energy equipment through heat conversion.

[0014] Beneficial effects of the utility model:

[0015] 1. By heating the gas flow through the pipeline of the sampling and testing equipment, the wet flue gas and smoke dust can be dried into dry flue gas before testing, which is convenient for monitoring with a dust meter and can achieve real-time monitoring. Compared with manual sampling and gas conversion and then testing, it is more efficient and accurate. At the same time, the condensation module is used to absorb heat and cool the flue gas discharged after the test, and the heat of the flue gas can be collected with the help of an external waste heat boiler for reuse, thereby improving energy efficiency;

[0016] 2. The detection system monitors the flow, pressure and temperature in the process pipeline while sampling to ensure the measurement accuracy and stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 What is shown is a first three-dimensional structural schematic diagram of the extraction type dust monitoring device for waste incineration power generation process of the utility model;

[0018] Figure 2 The second three-dimensional structure schematic diagram of the extraction type dust monitoring device for waste incineration power generation process of the utility model is shown;

[0019] Figure 3 What is shown is a schematic diagram of the front structure of the extraction type dust monitoring device for waste incineration power generation process of the utility model;

[0020] Figure 4 The diagram shows the side structure of the extraction type dust monitoring device for waste incineration power generation process of the utility model;

[0021] Figure 5 What is shown is a schematic diagram of the three-dimensional structure of the condensation module of the extraction type dust monitoring device in the waste incineration power generation process of the utility model.

[0022] Explanation of the reference numerals: 1. jet fan; 2. ejector; 3. dust monitor; 4. sampler; 5. dilution fan; 7. gate valve No. 1; 8. purge filter; 9. gate valve No. 2; 10. flow meter; 11. recoil ball valve; 601. dust collecting tray; 602. rising chamber; 603. collecting port; 604. air inlet; 605. condenser. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figure 1-4 The utility model provides an embodiment: an extraction type dust monitoring device for a waste incineration power generation process, comprising a dust monitor 3, a sampler 4, a jet fan 1, an ejector 2, a dilution fan 5, and a condensation module; the sampler 4 is fixed on the outer wall of a flue gas channel by bolt anchors, the dust monitor 3 is connected to the sampler 4 by a pipeline, the jet fan 1 and the ejector 2 are connected to the dust monitor 3 by a pipeline and are connected to the sampler 4, the dilution fan 5 is connected to the sampler 4 by a pipeline, the pipelines on the jet fan 1 and the ejector 2 and the pipeline on the dilution fan 5 are heated by electric auxiliary heating equipment to pass through the flue gas, the exhaust channels of the ejector 2 and the dilution fan 5 are connected to the condensation module, the technical solution adopts the SBF800 smoke system, the optical sensor of the dust monitor 3 is DURAG DR 800F, which measures the smoke concentration based on the forward scattering principle, and the DR 800F laser diode is integrated in the SBF On the measuring unit of the 800 smoke system, modulated light penetrates the measuring tube, and the light scattering of dust particles is mainly dispersed, so the receiving lens is positioned on the measuring probe of the dust monitor 3. The intensity of the scattered light is proportional to the dust concentration, so the more dust there is, the stronger the scattered light generated. The laser beam hits the dust to generate scattered light, which is transmitted to the photodiode through the receiving lens and its optical fiber for photoelectric conversion. The photodiode generates a current signal, which is processed by the microprocessor and converted into a dust measurement signal. The smoke after detection carries a lot of heat due to the heating treatment. The condenser 605 and the external waste heat boiler are used to cool the hot smoke and transfer the heat.

[0025] See also Figure 1-3In this embodiment, a No. 1 gate valve 7 is installed on the pipeline between the dust monitor 3 and the sampler 4, and a purge filter 8 connected to the internal detection channel is installed on the dust monitor 3. After the No. 1 gate valve 7 is closed, the flue gas will not enter the dust monitor 3 from the sampler 4. After the heating temperature in the system reaches the preset value, the No. 1 gate valve 7 automatically opens, and the mixed and diluted flue gas is sucked into the dust monitor 3 for detection through the negative pressure formed by the jet fan 1 and the ejector 2. A No. 2 gate valve 9 is installed on the pipeline between the dilution fan 5 and the sampler 4. A branch pipe extending through the sampler 4 and used for exhaust is extended from the pipeline between the dilution fan 5 and the No. 2 gate valve 9. In the flue gas detection state, the No. 2 gate valve 9 is closed, and the flue gas will not The air flows from the sampler 4 to the dilution fan 5, and the dilution fan 5 stops inputting air flow. After the No. 2 gate valve 9 is opened, the dilution fan 5 continuously delivers hot air flow to the sampling probe of the sampler 4, so that the flue gas and the hot air flow are mixed, diluted and dried to form dry flue gas. A flow meter 10 and a recoil ball valve 11 are successively installed on the branch pipe from the No. 2 gate valve 9 to the dust monitor 3. The flow meter 10 monitors the air flow output by the dilution fan 5, and sends a signal to the control unit of the entire system, and feeds back to adjust the power of the dilution fan 5 to ensure that the concentration of the diluted flue gas is at a suitable detection concentration. The recoil ball valve 11 is used to flush the pipeline between the dilution fan 5 and the sampler 4 to remove accumulated smoke and dust.

[0026] See also Figure 5 In this embodiment, the condensation module includes a dust collecting plate 601 and an ascending cavity 602; the interior of the dust collecting plate 601 is a funnel-shaped cavity structure, and a cylindrical ascending cavity 602 is integrally formed on the upper end of the dust collecting plate 601. The detected flue gas enters the dust collecting plate 601. Because the flue gas temperature is high, it flows upward and accumulates in the ascending cavity 602. After the temperature drops, it will gradually sink downward into the dust collecting plate 601, and the dust particles contained will also be collected along the funnel-shaped cavity structure to the middle of the bottom of the dust collecting plate 601. The condensation module also includes a collecting port 603 and an air inlet 604; a port opened and closed by a rubber plug is opened in the middle of the lower end of the dust collecting plate 601. The air inlet 604 is used to be connected to the pipe opening for exhausting flue gas, and the flue gas is introduced into the dust collecting plate 601. After opening the plug on the collecting port 603, the dust particles in the cooled flue gas can be taken out. The condensation module also includes a condenser 605. The condenser 605 is installed at the upper end of the rising chamber 602. The condenser tube of the condenser 605 is arranged in the rising chamber 602 and is connected to the waste heat boiler through an external circulating water pipe. The cold water in the condenser tube absorbs the heat in the flue gas, and the flue gas temperature drops and is deposited in the lower part. The water after absorbing the heat enters the waste heat boiler through the circulating pipe and is transferred to other energy equipment through heat conversion.

[0027] When working, the whole monitoring device contains 1 jet fan and 1 dilution fan 5. After the system is powered on, the heating module of the equipment starts to heat up, heating the pipelines in the whole system process, including the probe rod, the measuring unit, and the dilution air is also heated;

[0028] Since the power has just been turned on, the heating temperature of the entire system has not reached the sampling temperature, so the jet fan 1 generates wind to purge the sampling probe of the sampler 4 first. After the system detects through the temperature sensor that the heating temperature has reached the set temperature (the system heating temperature is greater than 140°C), the No. 1 gate valve 7 and the No. 2 gate valve 9 are switched on and off, and the flue gas sampling state is entered;

[0029] The negative pressure generated by the ejector 2 draws the sample gas into the sampling probe of the sampler 4. At the same time, the heated dilution air generated by the dilution fan 5 is quickly mixed with the sampled flue gas at the front end of the sampling probe and heated to dry flue gas. Then, it enters the subsequent heating pipeline and finally reaches the DR 800 measuring unit of the dust monitor to measure the dust concentration.

[0030] While sampling, the system monitors the pressure, flow and temperature in the process pipeline through the pressure sensor, flow meter 10 and temperature sensor installed on the pipeline to ensure the measurement accuracy and stability of the system.

[0031] Through the above steps, by heating the gas flow pipe of the sampling and detection equipment, the wet flue gas and smoke dust are dried into dry flue gas before detection, which is convenient for monitoring using the dust meter 3 and can achieve real-time monitoring. Compared with manual sampling and conversion of gas for re-detection, it is more efficient and accurate. At the same time, the condensation module is used to absorb heat and cool the flue gas discharged after the detection, and the heat of the flue gas can be collected by an external waste heat boiler for reuse, thereby improving energy utilization efficiency, so as to solve the problem that the existing garbage combustion dust detection cannot achieve real-time monitoring because the flue gas needs to be converted from dry to wet.

[0032] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. An extraction type dust monitoring device for a waste incineration power generation process, comprising a dust monitor (3) and a sampler (4); characterized in that: The invention also comprises a jet fan (1), an ejector (2), a dilution fan (5), and a condensation module; the sampler (4) is fixed on the outer wall of the smoke passage by bolt anchors; the dust monitor (3) is connected to the sampler (4) by a pipeline; the jet fan (1) and the ejector (2) are connected to the dust monitor (3) by a pipeline and are connected to the sampler (4); the dilution fan (5) is connected to the sampler (4) by a pipeline; the pipelines on the jet fan (1) and the ejector (2) and the pipeline on the dilution fan (5) are all heated by electric auxiliary heating equipment to heat the smoke gas flowing through; and the exhaust passages of the ejector (2) and the dilution fan (5) are connected to the condensation module.

2. The extractable dust monitoring device for waste incineration power generation process according to claim 1 is characterized in that: A No. 1 gate valve (7) is installed on the pipeline between the dust monitor (3) and the sampler (4), and a purge filter (8) connected to the internal detection channel is installed on the dust monitor (3).

3. The extractable dust monitoring device for waste incineration power generation process according to claim 1 is characterized in that: A No. 2 gate valve (9) is installed on the pipeline between the dilution fan (5) and the sampler (4), and a branch pipe extending from the pipeline between the dilution fan (5) and the No. 2 gate valve (9) passes through the sampler (4) and is used for exhaust.

4. The extractable dust monitoring device for waste incineration power generation process according to claim 3 is characterized by: A flow meter (10) and a recoil ball valve (11) are installed in sequence on the branch pipe from the No. 2 gate valve (9) to the dust monitor (3).

5. The extractable dust monitoring device for waste incineration power generation process according to claim 1 is characterized in that: The condensation module comprises a dust collecting tray (601) and an ascending cavity (602); the interior of the dust collecting tray (601) is a funnel-shaped cavity structure, and the upper end of the dust collecting tray (601) is integrally formed with a cylindrical ascending cavity (602).

6. The extractable dust monitoring device for waste incineration power generation process according to claim 5 is characterized in that: The condensation module further comprises a collection port (603) and an air inlet (604); an air inlet (604) which is opened and closed by a rubber plug is provided in the middle of the lower end of the dust collecting plate (601).

7. The extractable dust monitoring device for waste incineration power generation process according to claim 6 is characterized in that: The condensation module also includes a condenser (605); the condenser (605) is installed at the upper end of the ascending chamber (602); a condensing pipe of the condenser (605) is arranged in the ascending chamber (602) and is connected to the waste heat boiler through an external circulating water pipe.

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