CN112540230A - Wide temperature range atmosphere adjustable dust specific resistance testing arrangement - Google Patents
Wide temperature range atmosphere adjustable dust specific resistance testing arrangement Download PDFInfo
- Publication number
- CN112540230A CN112540230A CN202011411835.8A CN202011411835A CN112540230A CN 112540230 A CN112540230 A CN 112540230A CN 202011411835 A CN202011411835 A CN 202011411835A CN 112540230 A CN112540230 A CN 112540230A
- Authority
- CN
- China
- Prior art keywords
- voltage
- electrode
- atmosphere
- low
- furnace body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/22—Measuring resistance of fluids
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention provides a dust specific resistance testing device with adjustable wide temperature range atmosphere, which comprises a temperature and humidity control system, an atmosphere adjusting system, a sample system and an electric control system, wherein the temperature and humidity control system comprises a heating furnace, a temperature control system and a humidity control system, the temperature control system is used for adjusting the testing environment temperature in the furnace body of the heating furnace, the humidity control system is used for adjusting the atmosphere humidity in the furnace body of the heating furnace, the atmosphere adjusting system is used for providing different furnace atmospheres for the heating furnace, the sample system is arranged in the furnace body of the heating furnace and used for placing a dust sample to be tested, the electric control system is used for providing a high-voltage power supply for the sample system, reading voltage and current through a voltmeter and an ammeter and testing the specific resistance, so that the testing problem of the dust specific resistance under different atmosphere conditions can be effectively solved, the test method overcomes the defect that the current test method for the dust specific resistance in the laboratory can not completely simulate the test of the working condition.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of dust specific resistance testing, in particular to a dust specific resistance testing device with adjustable wide temperature range atmosphere.
[ background of the invention ]
At present, environmental pollution administers the problem and receives much attention, a large amount of fine particles that the coal burning discharged have caused serious harm to atmospheric environment and human health, the electrostatic precipitator is the mainstream technical equipment that industry flue gas particulate matter got rid of, dust specific resistance is one of the key parameter of electrostatic precipitator lectotype design, the accurate measurement of dust specific resistance can improve the lectotype hit rate of electrostatic precipitator by a wide margin, solve the problem that electrostatic precipitator lectotype is bigger partially and extravagant material and lectotype are smaller partially and can't reach dust collection efficiency, make the product property ability of electrostatic precipitator reach ideal effect.
The dust specific resistance can be defined as (resistance of dust × cross-sectional area through which current flows) ÷ dust layer thickness, and can also be defined as electric field intensity at both end surfaces of the dust layer ÷ generated current density in Ω · cm. The specific resistance of the dust is related to factors such as flue gas properties, temperature, humidity, components, pressure and dust properties, dust particle size distribution, dust components and the like.
The electric dust remover is widely used for trapping smoke particulate matters in coal-fired power plants, ferrous metallurgy, industrial kilns and the like, wherein the electric dust remover in the coal-fired power plants operates at about 5000Pa negative pressure, the sintering machine head operates at about 20000Pa negative pressure, and the electric dust remover in blast furnace gas operates at about 0.15MPa positive pressure.
Chinese patent CN103487661A discloses a variable atmosphere high temperature dust specific resistance testing device, which comprises a low voltage grounding electrode, an annular grounding electrode, a plate bottom for placing dust patterns, a high voltage plate electrode, an electric heater, a suspension mechanism and an atmosphere adjusting system, wherein the low voltage grounding electrode and the high voltage plate electrode are both located in an electric heating furnace, the low voltage grounding electrode is located above the high voltage plate electrode, a plate bottom for placing dust patterns is arranged between the low voltage grounding electrode and the high voltage plate electrode, the low voltage grounding electrode is connected with an ammeter through the suspension mechanism, and the high voltage plate electrode is arranged on a high temperature resistant base. The problem of different atmosphere dust specific resistance's measurement under the high temperature can be solved to this patent, overcomes the defect that conventional dust specific resistance testing arrangement can only test dust specific resistance in the air atmosphere. However, certain defects still exist, on one hand, the patent only considers the simulation of the dust specific resistance test environment at high temperature, and when the temperature is lower than 250 ℃, the influence of humidity on the dust specific resistance is also considered; on the other hand, the furnace body adopts a square box type heating furnace, and the furnace door is sealed by a buckling type switch, so that the requirements on the compression strength and the sealing performance of the furnace body are high.
[ summary of the invention ]
The invention aims to solve the problems in the prior art, provides a dust specific resistance testing device with an adjustable wide temperature range atmosphere, can effectively solve the problem of testing the dust specific resistance under different atmosphere conditions, and overcomes the defect that the current dust specific resistance laboratory testing method cannot completely simulate the working condition.
In order to achieve the purpose, the invention provides a dust specific resistance testing device with adjustable wide temperature range atmosphere, which comprises a temperature and humidity control system, an atmosphere adjusting system, a sample system and an electric control system, the temperature and humidity control system comprises a heating furnace, a temperature control system and a humidity control system, the temperature control system is used for adjusting the test environment temperature in the furnace body of the heating furnace, the humidity control system is used for adjusting the atmosphere humidity in the furnace body of the heating furnace, the atmosphere adjusting system is used for providing different furnace atmospheres for the heating furnace, the sample system is arranged in the furnace body of the heating furnace, used for placing a dust sample to be tested, the electric control system is used for providing a high-voltage power supply for the sample system, and reading the voltage applied to the dust layer and the current passing through the dust layer by a voltmeter and an ammeter, and carrying out a specific resistance test.
Preferably, the temperature control system comprises an electric heater, a temperature control device and a temperature sensor, the electric heater is arranged on the inner wall of the furnace body and is a coil heater, the temperature control device is located outside the furnace body and is electrically connected with the temperature sensor and the electric heater, the temperature sensor is used for detecting the temperature inside the furnace body and transmitting temperature information to the temperature control device, and the temperature control device controls the output power of the electric heater according to the temperature information so as to adjust the temperature of the test environment inside the furnace body of the heating furnace.
Preferably, the humidity control system comprises a preheating furnace, a peristaltic pump, a humidity control device and a humidity sensor, the peristaltic pump is connected to one end of the humidity control device, the other end of the humidity control device is communicated with the humidity sensor, water vapor is generated in the peristaltic pump, the water vapor enters the atmosphere adjusting system through the preheating furnace, the mixing tank (6) is fully mixed with mixed gas, the humidity control device is electrically connected with the humidity sensor and the peristaltic pump, the humidity sensor is arranged in the furnace body and used for detecting atmosphere humidity in the furnace body and transmitting humidity information to the humidity control device, and the humidity control device adjusts output power of the peristaltic pump according to the humidity information to accurately control the atmosphere humidity in the furnace body.
Preferably, the atmosphere adjusting system comprises a plurality of gas cylinders filled with various gas components, a rotor flow meter, a mixing tank, a pressure gauge, a stop valve, a booster pump, a vacuum pump and a vacuum pressure gauge, wherein the gas cylinders, the rotor flow meter and the mixing tank are sequentially connected outside the furnace body, the mixing tank is provided with the pressure gauge in a matching way, the stop valve is arranged at an outlet of the mixing tank, the vacuum pump is connected with a gas outlet pipeline of the furnace body, an outlet needle valve is arranged on the gas outlet pipeline, the vacuum pressure gauge is arranged at the position of an upper flange at the top of the furnace body, and the upper flange is also provided with an; the gas cylinders filled with various gas components enter the mixing tank after being accurately measured by the outlet rotor flow meter, the peristaltic pump generates water vapor and enters the mixing tank through the preheating furnace to be fully mixed with the mixed gas, the mixture of the water vapor and the mixed gas in the mixing tank enters the heating furnace through the inlet needle valve under the action of the booster pump to form the required test atmosphere in the furnace, and the booster pump and the gas outlet vacuum pump are used for adjusting the required gas pressure atmosphere in the furnace.
Preferably, the sample system comprises a high-voltage disc electrode, a low-voltage electrode, a high-temperature-resistant base and a suspension mechanism, the low-voltage electrode is located right above the high-voltage disc electrode, the central lines of the low-voltage electrode and the high-voltage disc electrode are kept on a vertical line, a dust sample to be detected is filled between the low-voltage electrode and the high-voltage disc electrode, the annular electrode is arranged outside the low-voltage electrode, the suspension mechanism comprises an insulating cross beam and a plurality of suspension rods, the suspension rods are respectively installed on the low-voltage electrode and the annular electrode, the insulating cross beam is fixed above the low-voltage electrode and the annular electrode through the plurality of suspension rods, the insulating cross beam is penetrated through the upper end of the suspension rods and is fixed on the insulating cross beam through a plurality of second bolt nuts, the high-.
Preferably, the hanger rods comprise a low-voltage electrode hanger rod and a plurality of annular electrode hanger rods, a gap of 2-3 mm is formed between the outer wall of the low-voltage electrode and the inner wall of the annular electrode, and no dust is filled in the gap; the upper end of the annular electrode suspender penetrates through the insulating beam, the insulating beam is fixed by second bolts and nuts positioned above and below the insulating beam, one end of a low-voltage lead of the annular electrode is connected with the top of the annular electrode suspender, and the other end of the low-voltage lead is led out of the furnace body and is safely grounded; the lower end of the low-voltage electrode suspender is fixedly connected with the middle part of the low-voltage electrode, the middle part of the low-voltage electrode suspender penetrates through the insulating cross beam and is fixed on the insulating cross beam through a second bolt and a second nut, the top end of the low-voltage electrode suspender is connected with a low-voltage lead of the low-voltage electrode, and the low-voltage lead of the low-voltage electrode is led out of the heating furnace to be connected with an ammeter; the high-voltage disc electrode is internally provided with a containing groove for filling dust.
Preferably, the electric control system comprises a high-voltage direct-current power supply, a voltmeter and an ammeter, the high-voltage direct-current power supply is located outside the furnace body, a high-voltage lead of the high-voltage direct-current power supply penetrates through the top of the furnace body to be led in and is connected with the high-voltage disc electrode, the high-voltage lead is connected with the high-voltage disc electrode through a second bolt and a nut, one end of the voltmeter is connected with the high-voltage direct-current power supply, the other end of the voltmeter is grounded, one end of the ammeter is.
Preferably, an upper flange at the top of the furnace body is provided with an electric porcelain sleeve, a high-voltage lead of a high-voltage direct-current power supply penetrates through the electric porcelain sleeve to be introduced, the electric porcelain sleeve is a high-temperature electric porcelain sleeve, the low-voltage sleeve comprises a steel sleeve, a sealing ring and high-temperature sealant, the steel sleeve is fixedly connected with the upper flange, the low-voltage lead penetrates through the inside of the steel sleeve, and the inner ring of the steel sleeve is provided with the sealing ring and the high-temperature sealant which are tightly matched with the low-voltage lead.
Preferably, the heating furnace comprises a furnace body, a protective layer, an upper flange and a lower flange, the furnace body is a cylindrical barrel body formed by continuously casting stainless steel, the top of the furnace body is provided with the lower flange which is bent inwards and extends, and the protective layer is arranged outside the furnace body.
Preferably, a plurality of first bolts are uniformly distributed above the lower flange, the upper flange and the lower flange are provided with holes at accurate positions corresponding to the first bolts, the upper flange and the lower flange are connected through a high-pressure flange when the heating furnace is closed, the high-pressure flange comprises the first bolts and a compression nut, a sealing gasket formed by winding metal is further arranged between the upper flange and the lower flange, and an explosion venting valve is further arranged on the upper flange.
The invention has the beneficial effects that:
1. the invention adopts the action of the peristaltic pump and the preheating furnace to generate water vapor stably, and the water vapor enters the mixing tank and is fully mixed with the mixed gas which is accurately metered by the rotameter and enters the mixing tank to form the required testing atmosphere.
2. The invention adopts the continuous casting heating furnace as the dust specific resistance testing container and adopts the upper and lower high-pressure flange bolts for connection, thereby ensuring the requirements of high temperature and high pressure resistance and tightness of the testing device.
3. The heating furnace is provided with the explosion relief valve, so that the pressure is instantly relieved when the system is in overpressure, and the safety of the structure and the performance of equipment is ensured.
4. The invention effectively solves the problem of testing the specific resistance of the dust under different atmosphere conditions, overcomes the defect that the current laboratory testing method of the specific resistance of the dust can not completely simulate the testing of working conditions, can stably test the temperature range below 1000 ℃ and the atmosphere pressure in the furnace is +/-5 MPa, and meets the laboratory simulation of the working conditions of various industrial flue gases and the testing requirements of the laboratory under the cold state conditions.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a schematic diagram of the internal structure of a dust specific resistance testing device with adjustable atmosphere in a wide temperature range according to the present invention;
FIG. 2 is a schematic structural diagram of a heating furnace of the dust specific resistance testing device with an adjustable atmosphere in a wide temperature range according to the present invention;
FIG. 3 is a schematic top view of a heating furnace of the dust specific resistance testing device with adjustable atmosphere in a wide temperature range.
Wherein: 1: furnace body, 2: protective layer, 3: electric heater, 4: gas cylinder, 5: rotameter, 6: mixing tank, 7: pressure gauge, 8: a stop valve, 9: preheating furnace, 10: peristaltic pump, 11: humidity controller, 12: a booster pump, 13: vacuum pump, 14: vacuum pressure gauge, 15: bushing for electrical porcelain, 16: upper flange, 17: lower flange, 18: temperature controller, 19: first bolt, 20: compression nut, 21: temperature sensor, 22: inlet needle valve, 23: humidity sensor, 24: explosion relief valve, 25: outlet needle valve, 26: ring electrode, 27: dust sample, 28: high-voltage disk electrode, 29: boom, 30: suspension mechanism, 31: low voltage electrode, 32: second bolt and nut, 33: high-temperature resistant base, 34: insulating underlayer, 35: low-pressure bushing, 36: gasket, 37: and (5) heating the furnace.
[ detailed description ] embodiments
Referring to fig. 1 to 3, the dust specific resistance testing device with adjustable wide temperature range atmosphere of the invention comprises a temperature and humidity control system, an atmosphere adjusting system, a sample system and an electric control system, wherein the temperature and humidity control system comprises a heating furnace 37, a temperature control system and a humidity control system, the temperature control system is used for adjusting the temperature of the testing environment inside the furnace body 1 of the heating furnace 37, the humidity control system is used for adjusting the humidity of the atmosphere inside the furnace body 1 of the heating furnace 37, the atmosphere adjusting system is used for providing different furnace atmospheres for the heating furnace 37, the sample system is arranged inside the furnace body 1 of the heating furnace 37 and is used for placing a dust sample 27 to be tested, the electric control system is used for providing a high-voltage power supply for the sample system, and reading the voltage of the dust sample 27 to be tested and the current of the dust sample 27 to be tested, specific resistance tests were performed.
Further, the temperature control system comprises an electric heater 3, a temperature control device 18 and a temperature sensor 21, the electric heater 3 is arranged on the inner wall of the furnace body 1, the electric heater 3 is a coil heater, the temperature control device 18 is located outside the furnace body 1 and is electrically connected with the temperature sensor 21 and the electric heater 3, the temperature sensor 21 is used for detecting the temperature inside the furnace body 1 and transmitting the temperature information to the temperature control device 18, and the temperature control device 18 controls the output power of the electric heater 3 according to the temperature information so as to adjust the temperature of the test environment in the furnace body 1 of the heating furnace 37.
Further, the humidity control system comprises a preheating furnace 9, a peristaltic pump 10, a humidity control device 11 and a humidity sensor 23, one end of the humidity control device 11 is connected with the peristaltic pump 10, the other end of the humidity control device is communicated with the humidity sensor 23, the peristaltic pump 10 generates water vapor, the water vapor enters the mixing tank 6 of the atmosphere adjusting system through the preheating furnace 9 and is fully mixed with the mixed gas, the humidity control device 11 is electrically connected with the humidity sensor 23 and the peristaltic pump 10, the humidity sensor 23 is arranged in the furnace body 1 and is used for detecting the humidity of the atmosphere in the furnace body 1 and transmitting the humidity information to the humidity control device 11, and the humidity control device 11 adjusts the output power of the peristaltic pump 10 according to the humidity information to accurately control the humidity of the atmosphere in the furnace body 1; the tank body of the mixing tank 6 is provided with a heat insulation layer, the temperature of the preheating furnace 9 can be adjusted within the range of 20-500 ℃, the length of a constant temperature area is 800mm, stable generation of water vapor after the action of the peristaltic pump 10 and the preheating furnace 9 is ensured, and the preheating furnace 9 is a tubular furnace.
Further, the atmosphere adjusting system comprises a plurality of gas cylinders 4 filled with various gas components, a rotor flow meter 5, a mixing tank 6, a pressure gauge 7, a stop valve 8, a booster pump 12, a vacuum pump 13 and a vacuum pressure gauge 14, wherein the gas cylinders 4, the rotor flow meter 5 and the mixing tank 6 are sequentially connected outside the furnace body 1, the pressure gauge 7 is arranged on the mixing tank 6, the stop valve 8 is arranged at an outlet of the mixing tank 6, the vacuum pump 13 is connected with a gas outlet pipeline of the furnace body 1, an outlet needle valve 25 is arranged on the gas outlet pipeline, the vacuum pressure gauge 14 is arranged at the position of an upper flange 16 at the top of the furnace body 1, and an inlet needle valve 22 is further arranged on the upper flange 16; a plurality of (also including single) gas cylinders 4 filled with various gas components enter a mixing tank 6 after being accurately measured by an outlet rotor flow meter 5, a peristaltic pump 10 is used for generating water vapor and fully mixing the water vapor and the mixed gas in the mixing tank 6 through a preheating furnace 9, the mixture of the water vapor and the mixed gas in the mixing tank 6 enters a heating furnace 37 through an inlet needle valve 22 under the action of a booster pump 12 to form a required furnace test atmosphere, and the booster pump 12 and an air outlet vacuum pump 13 are used for adjusting the required gas pressure atmosphere in the furnace.
Further, the sample system comprises a high-voltage disc electrode 28, a low-voltage electrode 31, a high-temperature resistant base 33 and a suspension mechanism, the low-voltage electrode 31 and the high-voltage disc electrode 28 are arranged in the furnace body 1, the low-voltage electrode 31 is positioned right above the high-voltage disc electrode 28, the central lines of the low-voltage electrode 31 and the high-voltage disc electrode 28 are kept on a vertical line, a to-be-detected dust sample 27 is filled between the low-voltage electrode 31 and the high-voltage disc electrode 28, an annular electrode 26 is arranged outside the low-voltage electrode 31, the suspension mechanism comprises an insulating cross beam 30 and a plurality of suspension rods 29, the suspension rods 29 are respectively arranged on the low-voltage electrode 31 and the annular electrode 26, the insulating cross beam 30 is fixed above the low-voltage electrode 31 and the annular electrode 26 through the plurality of suspension rods 29, the upper end of the suspension rod 29 penetrates through the insulating cross beam 30 and fixes, an insulating cushion layer 34 is arranged between the bottom of the high-temperature resistant base 33 and the furnace body 1. Boom 29 and high temperature resistant base 33 all adopt 2520 stainless steel, and this material can not take place high temperature oxidation and deformation under 1200 ℃, insulating cushion 34 adopts 50mm thick corundum (95 porcelain), and 95 porcelain is high temperature resistant, insulating good, the electric strength is big, chemical stability is high.
Further, the hanger rod 29 comprises a low-voltage electrode hanger rod and a plurality of annular electrode hanger rods, a gap of 2 mm-3 mm is formed between the outer wall of the low-voltage electrode 31 and the inner wall of the annular electrode 26, and dust cannot be filled in the gap; the upper end of the annular electrode suspender penetrates through the insulating beam 30, the insulating beam 30 is fixed by second bolts and nuts 32 positioned above and below the insulating beam 30, one end of a low-voltage lead of the annular electrode 26 is connected with the top of the annular electrode suspender, and the other end of the low-voltage lead is led out of the furnace body 1 and is safely grounded; the lower end of the low-voltage electrode suspender is fixedly connected with the middle part of the low-voltage electrode 31, the middle part of the low-voltage electrode suspender penetrates through the insulating cross beam 30 and is fixed on the insulating cross beam 30 through a second bolt and nut 32, the top end of the low-voltage electrode suspender is connected with a low-voltage lead of the low-voltage electrode 31, and the low-voltage lead of the low-voltage electrode 31 is led out of a heating furnace 37 to be connected with an ammeter and is; the high voltage disk electrode 28 has a vessel for filling dust therein. The filling height of the dust layer in the containing groove is 5mm, the high-pressure disc-shaped electrode is naturally filled with dust during filling, the high-pressure disc-shaped electrode is leveled by a scraping rule, and the pressure P of the low-pressure electrode 31 and the annular electrode 26 to the dust layer is less than or equal to 10g/cm2。
Further, the electric control system comprises a high-voltage direct-current power supply, a voltmeter and an ammeter, the high-voltage direct-current power supply is located outside the furnace body 1, a high-voltage lead of the high-voltage direct-current power supply penetrates through the top of the furnace body 1 to be led in and connected with the high-voltage disc electrode 28, the high-voltage lead is fixedly connected with the high-voltage disc electrode 28 through a second bolt and nut 32, one end of the voltmeter is connected with the high-voltage direct-current power supply, the other end of the voltmeter is grounded, one end of the ammeter is connected with a low.
Further, be provided with the electric porcelain sleeve pipe 15 on the last flange 16 at 1 top of furnace body, the high voltage lead of high voltage direct current power passes electric porcelain sleeve pipe 15 and introduces, electric porcelain sleeve pipe 15 adopts 95 porcelain for high temperature electric porcelain sleeve pipe, and insulating distance 60mm ~ 80mm, low pressure sleeve pipe 35 includes steel sleeve pipe, sealing washer and high temperature sealed glue, steel sleeve pipe and last flange 16 rigid coupling, the installation is guaranteed sealed and is withstand voltage good, the low pressure lead passes inside the steel sleeve pipe, the inner circle of steel sleeve pipe is equipped with the sealing washer and the high temperature sealed glue that closely cooperate with the low pressure lead mutually.
Further, the heating furnace 37 comprises a furnace body 1, a protective layer 2, an upper flange 16 and a lower flange 17, wherein the furnace body 1 is a cylindrical barrel body formed by continuously casting stainless steel, the top of the furnace body is provided with the lower flange 17 which is bent inwards and extends, the protective layer 2 is arranged outside the furnace body 1, and the protective layer 2 is used for isolating the high-temperature heating furnace 37 from the outside.
Further, in this embodiment, the furnace body 1 and the lower flange 17 are manufactured by continuous casting, a plurality of first bolts 19 manufactured by continuous casting with the furnace body 1 are uniformly distributed above the lower flange 17, holes are precisely formed in positions corresponding to the first bolts 19 of the upper flange 16 and the lower flange 17, when the heating furnace 37 is closed, the upper flange 16 and the lower flange 17 are connected through a high-pressure flange, the high-pressure flange comprises the first bolts 19 and a compression nut 20, a sealing gasket 36 formed by winding metal is further arranged between the upper flange 16 and the lower flange 17, and the upper flange 16 and the lower flange 17 are ensured to have good contact specific pressure and contact compactness during fastening; the heating furnace 37 is resistant to pressure of +/-10 MPa, the upper flange 16 is also provided with an explosion venting valve 24, the explosion venting pressure is 8MPa, the inner diameter of the furnace body 1 is 300mm, the wall thickness of the furnace body is 8mm, the thickness of the lower flange 17 is 15mm, and the material 022Cr17Ni12Mo2(316L) is adopted; the upper flange 16 is 15mm thick and made of 022Cr17Ni12Mo2 (316L).
The working process of the invention is as follows:
the invention relates to a dust specific resistance testing device with an adjustable wide temperature range and an adjustable atmosphere, which is characterized in that a high-voltage disc-shaped electrode 28, a dust sample 27 to be tested, a low-voltage electrode 31 and an annular electrode 26 are placed into a heating furnace 37 after being filled outside the furnace and installed, a dust layer is filled into the high-voltage disc-shaped electrode 28 when the operation is carried out, the filling height is 5mm, and the high-voltage disc-shaped electrode is naturally filled with dust when the filling is carried out and is scraped by a scraping ruler. The high-voltage lead and the low-voltage lead are respectively led out through an electric porcelain sleeve 15 and a low-voltage sleeve 35, an upper flange 16 and a lower flange 17 are connected with a compression nut 20 through a first bolt 19, and a preheating furnace 9 and an electric heater 3 in the furnace are started and set at a preset temperature. In the atmosphere adjusting process, taking N2 atmosphere as an example, firstly, N2 and atmosphere humidity are adjusted in the mixing tank 6, then the inlet needle valve 22 is closed, the outlet needle valve 25 is opened, and the vacuum pump 13 pumps the air in the furnace to-0.01 MPa; then closing the outlet needle valve 25, opening the inlet needle valve 22 and the booster pump 12 to blow N2, and controlling the speed of the gas entering the furnace body until the pressure in the furnace returns to the atmospheric pressure; and then closing the outlet needle valve 25, opening the outlet needle valve 25, pumping the gas in the furnace to the pressure of-0.01 MPa, opening the inlet needle valve 22, blowing N2 to the atmospheric pressure by the booster pump 12, repeating the steps for three times to ensure that the purity of the N2 in the furnace is higher, adjusting the power of the booster pump 12 and the power of the vacuum pump 13 according to the pressure required by the test to obtain a required test environment, and performing the specific resistance test when the atmosphere (gas purity, temperature, humidity and pressure) in the furnace is stable.
When in test, the high-voltage direct-current power supply is started, the voltage rises to 90% of the breakdown voltage of the dust layer in the test environment, the breakdown voltage is recorded as V, the current value I of the ammeter passing through the dust layer at the moment is read, and the formula is used
And calculating the specific resistance of the dust.
Wherein:
ρR-specific resistance of dust, Ω · cm;
a-area of low voltage electrode, cm2；
V-indication of voltage, V;
h is the thickness of the dust layer, cm;
i-current indication, A.
The invention effectively solves the problem of testing the specific resistance of the dust under different atmosphere conditions, overcomes the defect that the current laboratory testing method of the specific resistance of the dust can not completely simulate the testing of working conditions, can stably test the temperature range below 1000 ℃ and the atmosphere pressure in the furnace is +/-5 MPa, and meets the laboratory simulation of the working conditions of various industrial flue gases and the testing requirements of the laboratory under the cold state conditions.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (10)
1. The utility model provides a wide temperature domain atmosphere adjustable dust specific resistance testing arrangement which characterized in that: comprises a temperature and humidity control system, an atmosphere regulating system, a sample system and an electric control system, wherein the temperature and humidity control system comprises a heating furnace (37), a temperature control system and a humidity control system, the temperature control system is used for adjusting the test environment temperature in the furnace body (1) of the heating furnace (37), the humidity control system is used for adjusting the atmosphere humidity in the furnace body (1) of the heating furnace (37), the atmosphere adjusting system is used for providing different furnace atmospheres for the heating furnace (37), the sample system is arranged in the furnace body (1) of the heating furnace (37), used for placing a dust sample (27) to be tested, the electric control system is used for providing a high-voltage power supply for the sample system, and the voltage of the dust sample (27) to be tested and the current passing through the dust sample (27) to be tested are read through a voltmeter and an ammeter, and the specific resistance test is carried out.
2. The dust specific resistance testing device with the adjustable wide temperature range and atmosphere as claimed in claim 1, wherein: the temperature control system comprises an electric heater (3), a temperature control device (18) and a temperature sensor (21), wherein the inner wall of the furnace body (1) is provided with the electric heater (3), the electric heater (3) is a coil heater, the temperature control device (18) is positioned outside the furnace body (1) and is electrically connected with the temperature sensor (21) and the electric heater (3), the temperature sensor (21) is used for detecting the temperature inside the furnace body (1) and transmitting temperature information to the temperature control device (18), and the temperature control device (18) controls the output power of the electric heater (3) according to the temperature information so as to adjust the temperature of the environment to be tested in the furnace body (1) of the heating furnace (37).
3. The dust specific resistance testing device with the adjustable wide temperature range and atmosphere as claimed in claim 1, wherein: the humidity control system comprises a preheating furnace (9), a peristaltic pump (10), a humidity control device (11) and a humidity sensor (23), one end of the humidity control device (11) is connected with the peristaltic pump (10), the other end is communicated with the humidity sensor (23), the peristaltic pump (10) generates water vapor, and enters a mixing tank (6) of an atmosphere adjusting system through a preheating furnace (9) to be fully mixed with the mixed gas, the humidity control device (11) is electrically connected with a humidity sensor (23) and the peristaltic pump (10), the humidity sensor (23) is arranged in the furnace body (1), is used for detecting the humidity of the atmosphere in the furnace body (1) and transmitting the humidity information to a humidity control device (11), the humidity control device (11) adjusts the output power of the peristaltic pump (10) according to the humidity information so as to control the humidity of the atmosphere in the furnace body (1).
4. The dust specific resistance testing device with the adjustable wide temperature range and atmosphere as claimed in claim 3, wherein: the atmosphere adjusting system comprises a plurality of gas cylinders (4) filled with various gas components, a rotor flow meter (5), a mixing tank (6), a pressure gauge (7), a stop valve (8), a booster pump (12), a vacuum pump (13) and a vacuum pressure gauge (14), wherein the gas cylinders (4), the rotor flow meter (5) and the mixing tank (6) are sequentially connected outside the furnace body (1), the mixing tank (6) is provided with the pressure gauge (7), the stop valve (8) is arranged at an outlet of the mixing tank (6), the vacuum pump (13) is connected with a gas outlet pipeline of the furnace body (1), an outlet needle valve (25) is arranged on the gas outlet pipeline, the vacuum pressure gauge (14) is arranged at the position of an upper flange (16) at the top of the furnace body (1), and the upper flange (16) is also provided with an inlet needle valve (22); a plurality of gas cylinders (4) filled with various gas components enter a mixing tank (6) after being accurately measured by an outlet rotameter (5), water vapor is generated by a peristaltic pump (10) and enters the mixing tank (6) through a preheating furnace (9) to be fully mixed with mixed gas, the mixture of the water vapor and the mixed gas in the mixing tank (6) enters a heating furnace (37) through an inlet needle valve (22) under the action of a booster pump (12) to form a required furnace test atmosphere, and the booster pump (12) and a gas outlet vacuum pump (13) are used for adjusting the required gas pressure atmosphere in the furnace.
5. The dust specific resistance testing device with the adjustable wide temperature range and atmosphere as claimed in claim 1, wherein: the sample system comprises a high-voltage disc electrode (28), a low-voltage electrode (31), a high-temperature-resistant base (33) and a suspension mechanism, wherein the low-voltage electrode (31) is positioned right above the high-voltage disc electrode (28), the central lines of the low-voltage electrode and the high-voltage disc electrode are kept on a vertical line, a dust sample (27) to be detected is filled between the low-voltage electrode and the high-voltage disc electrode, an annular electrode (26) is arranged outside the low-voltage electrode (31), the suspension mechanism comprises an insulating cross beam (30) and a plurality of suspension rods (29), the suspension rods (29) are respectively arranged on the low-voltage electrode (31) and the annular electrode (26), the insulating cross beam (30) is fixed above the low-voltage electrode (31) and the annular electrode (26) through the plurality of suspension rods (29), the insulating cross beam (30) is penetrated through the upper end of the suspension rod, the high-pressure disc-shaped electrode (28) is arranged above the high-temperature resistant base (33), and an insulating cushion layer (34) is arranged between the bottom of the high-temperature resistant base (33) and the furnace body (1).
6. The dust specific resistance testing device with the adjustable wide temperature range and atmosphere as claimed in claim 5, wherein: the hanger rod (29) comprises a low-voltage electrode hanger rod and a plurality of annular electrode hanger rods, a gap of 2-3 mm is formed between the outer wall of the low-voltage electrode (31) and the inner wall of the annular electrode (26), and no dust is filled in the gap; the upper end of the annular electrode suspender penetrates through the insulating beam (30), the insulating beam (30) is fixed by second bolts and nuts (32) positioned above and below the insulating beam (30), one end of a low-voltage lead of the annular electrode (26) is connected with the top of the annular electrode suspender, and the other end of the low-voltage lead is led out of the furnace body (1) and is safely grounded; the lower end of the low-voltage electrode suspender is fixedly connected with the middle part of the low-voltage electrode (31), the middle part of the low-voltage electrode suspender penetrates through the insulating cross beam (30), the insulating cross beam (30) is fixed through a second bolt and nut (32), the top end of the low-voltage electrode suspender is connected with a low-voltage lead of the low-voltage electrode (31), and the low-voltage lead of the low-voltage electrode (31) is led out of a heating furnace (37) to be connected with an ammeter and is safely grounded; the high-voltage disc electrode (28) has a vessel for filling dust therein.
7. The dust specific resistance testing device with the adjustable wide temperature range and atmosphere as claimed in claim 5, wherein: electric control system includes high voltage direct current power supply, voltmeter and ampere meter, high voltage direct current power supply is located outside furnace body (1), and high voltage direct current power supply's high-pressure lead passes furnace body (1) top and introduces to link to each other with high-pressure disc electrode (28), high-pressure lead is connected through second bolt nut (32) with high-pressure disc electrode (28), voltmeter one end is connected with high voltage direct current power supply, and other end ground connection, the one end of ampere meter links to each other with the low pressure lead of low pressure electrode (31), and other end ground connection.
8. The dust specific resistance testing device with the adjustable wide temperature range and atmosphere as claimed in claim 7, wherein: be provided with electroceramics sleeve pipe (15) on last flange (16) at furnace body (1) top, high voltage direct current power supply's high voltage lead passes electroceramics sleeve pipe (15) and introduces, electroceramics sleeve pipe (15) are high temperature electroceramics sleeve pipe, low pressure sleeve pipe (35) are sealed including steel sleeve pipe, sealing washer and high temperature, steel sleeve pipe and last flange (16) rigid coupling, the low pressure lead wire passes inside the steel sleeve pipe, the inner circle of steel sleeve pipe is equipped with and closely cooperates sealing washer and high temperature sealed glue with the low pressure lead wire mutually.
9. The dust specific resistance testing device with the adjustable wide temperature range and atmosphere as claimed in claim 1, wherein: the heating furnace (37) comprises a furnace body (1), a protective layer (2), an upper flange (16) and a lower flange (17), wherein the furnace body (1) is a cylindrical barrel body formed by stainless steel continuous casting, the top of the furnace body is provided with the lower flange (17) which is bent inwards and extends, and the protective layer (2) is arranged outside the furnace body (1).
10. The dust specific resistance testing device with the adjustable wide temperature range and atmosphere as claimed in claim 9, wherein: the upper portion of lower flange (17) evenly arranges a plurality of first bolt (19), go up flange (16) and correspond the position trompil with first bolt (19) of lower flange (17), go up flange (16) and lower flange (17) when heating furnace (37) are closed and pass through high-pressure flange connection, high-pressure flange includes first bolt (19) and gland nut (20), still be provided with the sealed pad (36) that the metal winding formed between going up flange (16), lower flange (17), it explodes valve (24) still to be equipped with on going up flange (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011411835.8A CN112540230A (en) | 2020-12-04 | 2020-12-04 | Wide temperature range atmosphere adjustable dust specific resistance testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011411835.8A CN112540230A (en) | 2020-12-04 | 2020-12-04 | Wide temperature range atmosphere adjustable dust specific resistance testing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112540230A true CN112540230A (en) | 2021-03-23 |
Family
ID=75016056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011411835.8A Pending CN112540230A (en) | 2020-12-04 | 2020-12-04 | Wide temperature range atmosphere adjustable dust specific resistance testing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112540230A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117723915A (en) * | 2024-02-06 | 2024-03-19 | 哈尔滨理工大学 | Test electrode and method for composite insulation breakdown characteristics of inorganic powder and gas |
-
2020
- 2020-12-04 CN CN202011411835.8A patent/CN112540230A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117723915A (en) * | 2024-02-06 | 2024-03-19 | 哈尔滨理工大学 | Test electrode and method for composite insulation breakdown characteristics of inorganic powder and gas |
| CN117723915B (en) * | 2024-02-06 | 2024-04-16 | 哈尔滨理工大学 | Test electrode and method for composite insulation breakdown characteristics of inorganic powder and gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102353763B (en) | Small simulation device for testing spontaneous combustion period of coal | |
| CN107782480B (en) | Method and device for testing minimum ignition energy of combustible dust/combustible gas mixture | |
| CN214503752U (en) | Wide temperature range atmosphere adjustable dust specific resistance testing arrangement | |
| CN108195688A (en) | Simulate the internal pressure creep testing device and method of coal-fired plant boiler pipe Service Environment | |
| CN112540230A (en) | Wide temperature range atmosphere adjustable dust specific resistance testing arrangement | |
| CN207751709U (en) | A kind of on-line period device for pressure medium | |
| CN106404986A (en) | Test device and test method for electrostatic discharge ignition | |
| CN206339347U (en) | Valve pressure detecting tool | |
| CN106422991B (en) | Gas-liquid-solid three-phase discharge hydrofining device for bio-oil | |
| CN114137024A (en) | Combustible fluid explosion characteristic testing system and method under variable temperature and variable humidity conditions | |
| CN104089869B (en) | Filtrate corrosion simulated experiment device and method | |
| CN106353018B (en) | Electrically operated valve dynamic torque continuous test device under a kind of complex working condition | |
| CN111624228A (en) | Dust explosion experimental device | |
| CN103487661B (en) | Atmosphere-variable high-temperature dust specific resistivity test device | |
| CN204964354U (en) | High cleanliness ultra -temperature steam reacting furnace device | |
| CN204556467U (en) | A kind of experimental provision of simulating corrosion of sulfuric acid dew | |
| CN203941088U (en) | Filtrate corrosion simulated experiment device | |
| CN203101244U (en) | Transformer station metal component corrosion acceleration device | |
| CN104634898B (en) | Test method and the device of transformer oil aerogenesis trend is evaluated under electric heating mixing field | |
| CN217425144U (en) | Experimental device for burn living beings simulation corrosive atmosphere | |
| CN205662492U (en) | A device for improving liquid flow mobility | |
| CN111175434A (en) | Experimental device for combustible gas combustion characteristic integrated test | |
| CN2531231Y (en) | Activation device for hydrogen tank | |
| CN209656236U (en) | A kind of automotive oil tank air-tightness detection device | |
| CN205175109U (en) | Atmosphere protection heating furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |