CN110038405B - UV photolysis purification equipment and temperature control method thereof - Google Patents
UV photolysis purification equipment and temperature control method thereof Download PDFInfo
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- CN110038405B CN110038405B CN201810045322.6A CN201810045322A CN110038405B CN 110038405 B CN110038405 B CN 110038405B CN 201810045322 A CN201810045322 A CN 201810045322A CN 110038405 B CN110038405 B CN 110038405B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
Abstract
The invention provides UV photolysis purification equipment and a temperature control method thereof, which solve the problem that the common UV photolysis purification equipment is easy to explode due to overhigh temperature in the process of cracking waste gas and comprise the following steps: photodissociation device case, photodissociation device incasement portion is provided with: a plurality of UV lamps capable of emitting D-band high-energy ultraviolet rays for breaking chemical bonds between organic gases and oxygen; the cooling water circulation system is used for cooling the inside of the photolysis device box; the temperature sensor is arranged in the photolysis device box and used for sensing the internal temperature of the photolysis device box; and, locate the outside temperature control box of photodissociation device case, the temperature control box includes: the display screen is used for displaying the temperature signal value measured by the temperature sensor: a touch screen for inputting a human-computer instruction; and the control system is electrically connected with the touch screen and the display screen and is used for controlling the opening and closing of the UV lamp tubes and the cooling water circulating system, so that the aim of improving the photolysis efficiency in the malodorous gas in the UV photolysis purification equipment is fulfilled.
Description
Technical Field
The invention relates to the technical field of waste gas purification treatment, in particular to UV photolysis purification equipment and a temperature control method thereof.
Background
At present, the environmental protection industry in China is in the development period, and methods for purifying and treating waste gas mainly comprise a UV photolysis purification method, a biological decomposition method, an activated carbon adsorption method, a plasma method, a plant spraying liquid deodorization method and the like. The UV photolysis purification method has the advantages of capability of purifying various organic compounds, reliable and stable purification technology, no need of daily maintenance of purification equipment and extremely low operation cost.
The principle of the UV photolysis purification equipment is that high-energy high-ultraviolet light beams are utilized to decompose oxygen molecules in air to generate free oxygen, namely active oxygen, and the free oxygen carries out positive and negative electron imbalance so that the active oxygen needs to be combined with the oxygen molecules to generate ozone, and the high-energy ultraviolet light beams and the ozone carry out synergistic decomposition oxidation reaction on malodorous gas, so that malodorous gas substances are degraded and converted into low-molecular compounds, water and carbon dioxide, and the effect of purifying the air is achieved. According to research, when the reaction temperature in the UV photolysis purification equipment is about 60 ℃, the decomposition and oxidation rate of the UV photolysis purification equipment to the malodorous gas is at the highest value.
The invention provides a method for treating malodorous waste gas, which comprises collecting malodorous waste gas, sending the collected malodorous waste gas into a treatment chamber, irradiating the malodorous waste gas by a 254nm ultraviolet lamp tube to decompose part of weak bond molecules, irradiating the malodorous waste gas by a 185nm ultraviolet lamp tube to melt and decompose residual odor components with high bond energy, generating ozone inside the treatment chamber under the irradiation excitation of the 185nm ultraviolet lamp tube, loading foam nickel containing a nano photocatalyst on the inner wall of the treatment chamber, and generating hydroxyl radical, ozone and hydroxyl radical under the excitation of ultraviolet light by the nano photocatalyst to decompose most organic molecules in the waste gas so as to achieve the purpose of thorough deodorization and purification.
However, in the photolysis process of the malodorous exhaust gas in the treatment chamber, the temperature of the ultraviolet lamp tube in the treatment chamber is gradually increased due to long-term irradiation, and when the temperature in the treatment chamber exceeds the fastest reaction temperature value, the photolysis efficiency of the malodorous exhaust gas in the treatment chamber is lowered, so that improvement is needed.
Disclosure of Invention
The invention aims to provide UV photolysis purification equipment and a temperature control method thereof, which can control the temperature in the UV photolysis purification equipment and have the advantages of preventing the UV photolysis purification equipment from being overheated and improving the photolysis efficiency of malodorous gas.
The technical purpose of the invention is realized by the following technical scheme: a UV photolysis purification apparatus comprising: photodissociation device case, photodissociation device case both ends relatively are provided with air inlet and gas outlet respectively, photodissociation device incasement portion is provided with UV photodissociation banks, UV photodissociation banks includes: a plurality of UV lamps capable of emitting D-band high-energy ultraviolet rays for breaking chemical bonds between organic gases and oxygen; the ballast is electrically connected with the corresponding UV lamp tube and provides instant high voltage required by the UV lamp tube to emit light, and the temperature sensor is arranged in the photolysis device box and used for sensing the temperature in the photolysis device box; and, locate the outside temperature control box of photolysis device case, the temperature control box includes: the display screen is used for displaying the temperature signal value measured by the temperature sensor: a touch screen for inputting a human-computer instruction; and the control system is electrically connected with the touch screen and the display screen and is used for controlling the opening and closing of the UV lamp tubes, and the control system is in communication connection with the temperature sensor.
By adopting the technical scheme, waste gas to be treated enters the photolysis device box through the gas inlet, a plurality of UV (ultraviolet) lamp tubes in the photolysis device box continuously emit D-waveband high-energy ultraviolet rays to break chemical bonds of organic gas and oxygen, and waste gas molecules are finally cracked and oxidized to form carbon dioxide and water vapor which are discharged out of the photolysis device box through the gas outlet; simultaneously temperature sensor carries out real-time detection to the temperature of photolysis device incasement to send temperature sensing signal to control system, control system will sense to show on the display screen to the temperature value, operating personnel sends man-machine instruction to control system through the touch-sensitive screen according to this temperature value, control system control UV fluorescent tube is opened and close, thereby control the temperature of photolysis device incasement, reach and prevent that photolysis device incasement portion is overheated, improve the purpose of foul gas photolysis efficiency.
In a further aspect of the invention, the UV photolysis lamp bank further includes a lamp cover plate for mounting the plurality of UV lamps and separating the plurality of ballasts and the plurality of UV lamps in the photolysis device housing.
Through adopting above-mentioned technical scheme, the lamp apron separates UV fluorescent tube and ballast, and the heat that produces in the ballast working process is difficult for dispersing the photodissociation device incasement, has reduced the photodissociation device case because of inside high temperature influences the problem of foul gas photodissociation efficiency.
According to the invention, the UV lamp tube is characterized in that a plurality of stand columns are fixed on one side of the lamp cover plate, which is opposite to the UV lamp tube, explosion doors for installing a plurality of ballasts are rotatably installed on the stand columns through hinges, and a plurality of closing doors are arranged on the box shell of the photolysis device on the outer side of each explosion door.
By adopting the technical scheme, the explosion door has strong impact resistance, and can resist the explosion pressure in the range under the explosion condition so as to achieve the necessary protection effect; the closing door can be opened in good time, and the ballast of being convenient for outwards gives off heat, prevents that photodissociation device incasement portion temperature is too high.
According to the invention, the photolysis device box shell is provided with a plurality of radiators for diffusing hot air between the closing door and the explosion-proof door to the outside.
Through adopting above-mentioned technical scheme, the setting of radiator is convenient for the outside discharge of hot-air between closing door and the explosion vent, prevents that the temperature in this region is too high.
In a further aspect of the present invention, the UV photolysis purification apparatus further includes a cooling water circulation system controlled by the temperature control box and configured to cool the inside of the photolysis device tank, wherein the cooling water circulation system includes: a water storage tank disposed in the photolysis device tank; both ends with the storage water tank intercommunication stretches into the cold water pipeline in the photolysis device case: the refrigerating water pump is arranged in the water storage tank and drives circulating water to circularly flow in the cold water pipeline and takes away part of heat in the photolysis device tank; and the regulating valve is arranged on the cold water pipeline and is controlled by the control system to regulate the flow of the circulating water in the cold water pipeline.
By adopting the technical scheme, the refrigerating water pump can drive circulating water to circularly flow in the cold water pipeline, so that part of heat in the photolysis device box is taken away, the photolysis device box is cooled, and the overhigh temperature in the photolysis device box is prevented; the opening size of control governing valve is passed through to control system, reaches the control cold water pipeline well circulating water flow size, and then reached with the inside temperature control of photolysis device case in the constant range, improve the purpose of foul gas photolysis efficiency.
According to a further arrangement of the invention, the cold water pipeline is fixed on the inner wall of the photolysis device box in a disc-shaped state.
Through adopting above-mentioned technical scheme, the heat exchange effect between the cold water pipeline of this kind of structure and the photolysis device case is better.
In a further aspect of the present invention, the photolysis device tank and the closing door are made of austenitic stainless steel plates.
By adopting the technical scheme, the austenitic stainless steel plate has the advantages of stable structure of austenitic structure inside, stable performance, good fireproof and corrosion resistance and long service life.
According to the invention, the air inlet is provided with the HEPA filter screen.
Through adopting above-mentioned technical scheme, HEPA filter screen can the filtering get into the solid particle thing in the waste gas of photolysis device incasement, prevents that solid particle thing from getting into the photolysis device incasement and adhering to on the UV fluorescent tube surface, influences the photolysis efficiency of waste gas.
A temperature control method of UV photolysis purification equipment is used for controlling the temperature in the UV photolysis purification equipment and comprises the following steps: setting a predetermined temperature threshold inside the photolysis device tank: the preset temperature threshold comprises a first temperature threshold, a second temperature threshold and a third temperature threshold which are sequentially increased in temperature; the temperature sensor acquires the temperature in the photolysis device box, when the temperature value in the photolysis device box is lower than a first temperature threshold value, the waste gas is stopped being conveyed into the photolysis device box, the control system controls the UV lamp tubes in the UV photolysis lamp bank to be fully opened and controls the regulating valve in the cooling water circulation system to be fully closed, and the temperature in the photolysis device box gradually rises due to continuous heating of the UV lamp tubes; if the temperature value in the photolysis device box exceeds a first temperature threshold and is lower than a second temperature threshold, waste gas begins to be conveyed into the photolysis device box, the control system controls the UV lamp tube in the UV photolysis lamp bank to be fully opened and controls the regulating valve in the cooling water circulation system to be opened, so that the heat in the cold water pipeline carrying the photolysis device box is balanced with the heat emitted by the UV lamp tube, and the temperature value in the photolysis device box is constant between the first temperature threshold and the second temperature threshold; if the temperature value in the photolysis device box exceeds a second temperature threshold and is lower than a third temperature threshold, the control system controls the opening number of UV lamp tubes in the UV photolysis lamp group to gradually decrease, the opening degree of the regulating valve is gradually increased, and the cold water pipeline brings heat in the photolysis device box away to exceed heat emitted by the UV lamp tubes so as to gradually decrease the temperature in the photolysis device box; if the temperature value in the photolysis device box exceeds a third temperature threshold value, the control system controls all UV lamp tubes in the UV photolysis lamp bank to be closed, and the opening of the regulating valve is regulated to the maximum value, so that the photolysis device box is rapidly cooled.
Through adopting above-mentioned technical scheme, in UV photodissociation clarification plant operation in-process, temperature sensor carries out in good time detection to the temperature of photolysis device incasement, control system controls the flow size of opening quantity and the cold water pipeline internal circulation water among the UV fluorescent tube in the UV photodissociation banks according to the temperature value of photolysis device incasement, with the constancy of temperature of photolysis device incasement near second temperature threshold value, thereby make the photolysis device case higher to foul gas's photolysis efficiency, be difficult for again because of overheated explosion phenomenon, the stability of UV photodissociation clarification plant operation in-process has been improved.
According to a further development of the invention, the first temperature threshold is 50 degrees celsius, the second temperature threshold is 60 degrees celsius and the third temperature threshold is 70 degrees celsius.
By adopting the technical scheme, when the temperature in the photolysis device box is lower than 50 ℃, the cracking and oxidation time of the waste gas is long, and the purification efficiency of the waste gas is poor; when the temperature in the photolysis device box is about 60 ℃, the cracking and oxidation time of the waste gas is short, and the purification efficiency of the waste gas is high; when the temperature in the photolysis device case exceeded 70 ℃, the indoor high temperature of photolysis device, and waste gas is at the interior rapid expansion of photolysis device case, and the phenomenon of explosion takes place because of the temperature is too big easily for the photolysis device case, and the security performance of UV photolysis clarification plant operation in-process is relatively poor.
When the temperature in the photolysis device box is lower than 50 ℃, the cracking and oxidation time of the waste gas is longer, and the purification efficiency of the waste gas is not high; when the temperature in the photolysis device box is about 60 ℃, the cracking and oxidation time of the waste gas is short, and the purification effect of the waste gas is good; when the temperature in the photolysis device case exceeded 70 degrees centigrade, the indoor high temperature of photolysis device, and waste gas is in the interior rapid expansion of photolysis device case, and foul gas in the unit volume is less, and the photolysis device case is lower to foul gas's purification efficiency, and the high easy phenomenon of exploding of taking place of temperature in the photolysis device case moreover, and the security performance of UV photolysis clarification plant operation in-process is also relatively poor.
In conclusion, the invention has the following beneficial effects:
1. the temperature sensor timely detects the temperature in the photolysis device box, the control system controls the opening number of UV lamp tubes in the UV photolysis lamp bank and the flow of circulating water in a cold water pipeline in the cooling water circulation system according to the temperature value in the photolysis device box, the temperature in the photolysis device box is controlled to be about 60 ℃, and the photolysis efficiency of malodorous gas in the photolysis device box is improved;
2. the constant temperature in the photolysis device box can efficiently remove main pollutants such as volatile organic compounds, inorganic substances, hydrogen sulfide, ammonia gas, thiols and the like and various malodorous gases.
Drawings
FIG. 1 is a schematic view showing the overall structure of a photolysis device tank according to an embodiment of the present invention;
fig. 2 is a schematic view showing the overall structure of the photolysis device tank according to the embodiment of the present invention, in which a part of the tank case of the photolysis device has been hidden to show the internal structure thereof.
Reference numerals: 1. a photolysis device box; 2. an air inlet; 3. an air outlet; 4. a UV photolysis lamp bank; 5. a UV lamp tube; 6. a ballast; 7. a temperature control box; 8. a lamp cover plate; 9. an explosion vent; 10. closing the door; 11. a heat sink; 12. a water storage tank; 13. a cold water line; 14. a chilled water pump; 15. adjusting a valve; 16. HEPA filter screen.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): the utility model provides a UV photodissociation clarification plant, combines fig. 1 and fig. 2 to show, includes photodissociation device case 1, and photodissociation device case 1 is provided with air inlet 2 and gas outlet 3 respectively in the relative both ends, and photodissociation device case 1 internally mounted has UV photodissociation banks 4.
The UV photolysis lamp set 4 includes: the UV lamp tubes 5 are arranged in a direction perpendicular to the connecting line of the gas inlet 2 and the gas outlet 3 and are uniformly spaced, the UV lamp tubes 5 can emit D-band high-energy ultraviolet rays for breaking chemical bonds between organic gas and oxygen, and the wavelength of the ultraviolet rays is less than 200 nanometers and preferably 183 nanometers; each UV lamp tube 5 is electrically connected with a ballast 6, and the ballast 6 is used for providing high voltage required by the UV lamp tube 5 to emit light instantly. Waste gas to be treated enters the photolysis device box 1 through the gas inlet 2, a plurality of UV lamp tubes 5 in the photolysis device box 1 continuously emit D-waveband high-energy ultraviolet rays to break chemical bonds of organic gas and oxygen, and waste gas molecules are finally cracked and oxidized to form carbon dioxide and water vapor which are discharged out of the photolysis device box 1 through the gas outlet 3.
The lamp cover plate 8 is fixed with a stand on one side back to the UV lamp tube 5, an explosion door 9 for installing a plurality of ballasts 6 is installed on the stand through hinge rotation, and three groups of closing doors 10 are arranged on the shell of the photolysis device box 1 on the outer side of the explosion door 9. Because the explosion door 9 has strong impact resistance, the explosion door 9 can resist the explosion pressure in the range under the condition of explosion, thereby achieving the necessary protection effect; the closing door 10 can be opened at a proper time, so that heat generated by the ballast 6 can be emitted to the outside, and the temperature inside the photolysis device box 1 can be prevented from being too high.
Four sets of heat sinks 11 are mounted on the housing of the photolysis device tank 1, and the heat sinks 11 allow the hot air between the closing door 10 and the explosion vent 9 to diffuse to the outside, thereby preventing the temperature in the region from being too high.
The photolysis device box 1 and the closing door 10 are both made of austenitic stainless steel plates, and the austenitic stainless steel plates are internally provided with austenitic tissues with stable structures, so that the photolysis device box 1 and the closing door 10 are stable in performance, good in fireproof and corrosion resistant performance and long in service life.
2 departments of air inlet are provided with the HEPA filter screen, and the solid particle in the waste gas that the HEPA filter screen can the filtering get into the photolysis device case 1 prevents that solid particle from getting into the photolysis device case 1 in and adhering to 5 surfaces of UV fluorescent tube, influence the photolysis efficiency of waste gas.
The UV photolysis purification equipment also comprises a temperature sensor for sensing the temperature inside the photolysis device box 1; and a temperature control box 7 provided outside the photolysis device box 1. The temperature control box 7 includes: the display screen is used for displaying the temperature signal value measured by the temperature sensor: a touch screen for inputting a human-computer instruction; and the control system is electrically connected with the touch screen and the display screen and is used for controlling the opening and closing of the UV lamp tubes 5, and the control system is in communication connection with the temperature sensor. Temperature sensor carries out real-time detection to the temperature in the photolysis device case 1 to send temperature sensing signal to control system, control system will sense to show on the display screen to the temperature value, operating personnel sends man-machine instruction to control system through the touch-sensitive screen according to this temperature value, control system control UV fluorescent tube 5 is opened and close, thereby control the temperature in the photolysis device case 1, reach and prevent that photolysis device case 1 is inside overheated, improve the purpose of foul gas photolysis efficiency.
UV photodissociation clarification plant still includes the cooling water circulating system who is controlled by temperature control box 7, and cooling water circulating system is used for cooling down in the photolysis device case 1. The cooling water circulation system includes: a water storage tank 12 provided in the photolysis device tank 1; two ends of the cold water pipeline 13 are communicated with the water storage tank 12 and extend into the photolysis device tank 1: a freezing water pump 14 which is arranged in the water storage tank 12 and drives circulating water to circularly flow in the cold water pipeline 13 and takes away part of heat in the photolysis device tank 1; and an adjusting valve 15 provided in the cold water pipe 13 and controlled by the control system to adjust the flow rate of the circulating water in the cold water pipe 13. The refrigeration water pump 14 can drive circulating water to circularly flow in the cold water pipeline 13, take away part of heat in the photolysis device box 1, cool the photolysis device box 1, and prevent the temperature in the photolysis device box 1 from being too high; the control system controls the opening of the regulating valve 15 to control the flow of the circulating water in the cold water pipeline 13, so as to control the temperature inside the photolysis device box 1 within a constant range and improve the photolysis efficiency of the malodorous gas.
The cold water pipeline 13 is fixed on the inner wall of the photolysis device box 1 in a disc state, and the heat exchange effect between the cold water pipeline 13 and the photolysis device box 1 is good.
The embodiment also provides a temperature control method of the UV photolysis purification equipment, which is used for controlling the temperature in the UV photolysis purification equipment, and comprises the following steps: firstly, setting a preset temperature threshold value in the photolysis device box 1, wherein the preset temperature threshold value comprises a first temperature threshold value, a second temperature threshold value and a third temperature threshold value which are increased in temperature in sequence; secondly, the temperature sensor obtains the temperature in the photolysis device box 1, and finally the control system controls the UV photolysis lamp bank 4 and the cooling water circulation system through a temperature signal value. When the temperature value in the photolysis device box 1 is lower than a first temperature threshold value, stopping conveying the waste gas into the photolysis device box 1, controlling the UV lamp tube 5 in the UV photolysis lamp group 4 to be fully opened by the control system, and controlling the regulating valve 15 in the cooling water circulation system to be completely closed, wherein the temperature in the photolysis device box 1 gradually rises due to continuous heating of the UV lamp tube 5; when the temperature value in the photolysis device box 1 exceeds a first temperature threshold and is lower than a second temperature threshold, waste gas begins to be conveyed into the photolysis device box 1, the control system controls the UV lamp tube 5 in the UV photolysis lamp group 4 to be fully opened and controls the regulating valve 15 in the cooling water circulating system to be opened, so that the heat in the photolysis device box 1 taken away by the cold water pipeline 13 is balanced with the heat emitted by the UV lamp tube 5, and the temperature value in the photolysis device box 1 is constant between the first temperature threshold and the second temperature threshold; when the temperature value in the photolysis device tank 1 exceeds the second temperature threshold and is lower than the third temperature threshold, the control system controls the opening number of the UV lamp tubes 5 in the UV photolysis lamp group 4 to gradually decrease, and gradually increases the opening degree of the regulating valve 15, and the cold water pipeline 13 takes away the heat in the photolysis device tank 1 to exceed the heat emitted by the UV lamp tubes 5, so that the temperature in the photolysis device tank 1 is gradually decreased; when the temperature value in the photolysis device box 1 exceeds the third temperature threshold value, the control system controls the UV lamp tubes 5 in the UV photolysis lamp bank 4 to be completely closed, and adjusts the opening degree of the adjusting valve 15 to the maximum value, so as to rapidly perform cooling treatment on the photolysis device box 1. In UV photodissociation clarification plant operation in-process, temperature sensor carries out in good time detection to the temperature in the photolysis device case 1, control system controls the flow size of opening quantity of UV fluorescent tube 5 and the cold water pipeline 13 internal recycle water in the cooling water circulation system in the UV photodissociation banks 4 according to the temperature value in the photolysis device case 1, the constancy of temperature in the photolysis device case 1 is near second temperature threshold value, thereby make photolysis device case 1 higher to foul gas's photolysis efficiency, simultaneously difficult explosion phenomenon because of overheated emergence again, the stability of UV photodissociation clarification plant operation in-process has been improved.
The first temperature threshold is 50 degrees celsius, the second temperature threshold is 60 degrees celsius, and the third temperature threshold is 70 degrees celsius. When the temperature in the photolysis device box 1 is lower than 50 ℃, the cracking and oxidation time of the waste gas is long, and the purification effect of the waste gas is poor; when the temperature in the photolysis device box 1 is about 60 ℃, the cracking and oxidation time of the waste gas is short, and the purification efficiency of the waste gas is high; when the temperature in the photolysis device case 1 exceeded 70 degrees centigrade, the temperature was too high in the photolysis device case 1, and waste gas was expanded in the photolysis device case 1 dramatically, and foul gas in the unit volume is less, and photolysis device case 1 is lower to foul gas's purification efficiency, and the phenomenon of explosion takes place easily for the high temperature in the photolysis device case 1 in addition, and the security performance of UV photolysis clarification plant operation in-process is also relatively poor.
The working process and principle are as follows: in the operation process of the UV photolysis purification equipment, the temperature sensor timely detects the temperature in the photolysis device box 1, the control system controls the opening quantity of the UV lamp tubes 5 in the UV photolysis lamp bank 4 and the flow of circulating water in the cold water pipeline 13 in the cooling water circulation system according to the temperature value in the photolysis device box 1, the purpose that the temperature in the photolysis device box 1 is constant near a second temperature threshold value is achieved, the photolysis device box 1 is high in purification rate and meanwhile is not prone to explosion due to overheating, and the stability of the UV photolysis purification equipment in the operation process is improved.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (7)
1. A temperature control method of a UV photolysis purification apparatus, the UV photolysis purification apparatus comprising:
photolysis device case (1), photolysis device case (1) relative both ends are provided with air inlet (2) and gas outlet (3) respectively, photolysis device case (1) inside is provided with UV photodissociation banks (4), UV photodissociation banks (4) include: a plurality of UV lamps (5) capable of emitting D-band high-energy ultraviolet rays for breaking chemical bonds between organic gases and oxygen; and a ballast (6) which is electrically connected with the corresponding UV lamp tube (5) and provides high voltage required by the UV lamp tube (5) to emit light at the same time;
the temperature sensor is arranged in the photolysis device box (1) and used for sensing the internal temperature of the photolysis device box (1); and the number of the first and second groups,
locate photolysis device case (1) outside temperature control box (7), temperature control box (7) include: the display screen is used for displaying the temperature signal value measured by the temperature sensor; a touch screen for inputting a human-computer instruction; the control system is electrically connected with the touch screen and the display screen and is used for controlling the opening and closing of the UV lamp tubes (5), and the control system is in communication connection with the temperature sensor;
UV photodissociation clarification plant still includes and receives temperature control box (7) control, be used for right carry out the cooling water circulating system who cools down in photodissociation device case (1), cooling water circulating system includes:
a water storage tank (12) arranged in the photolysis device box (1);
both ends with storage water tank (12) intercommunication and stretch into cold water pipeline (13) in the photolysis device case (1):
a freezing water pump (14) which is arranged in the water storage tank (12) and drives circulating water to circularly flow in the cold water pipeline (13) and takes away part of heat in the photolysis device box (1); and the number of the first and second groups,
the regulating valve (15) is arranged on the cold water pipeline (13) and is controlled by the control system to regulate the circulating water flow in the cold water pipeline (13);
the control system is used for controlling the opening number of UV lamp tubes (5) in the UV photolysis lamp bank (4) and the flow of circulating water in a cold water pipeline (13) in the cooling water circulation system according to the temperature value in the photolysis device box (1), and controlling the temperature in the photolysis device box (1) to be between 50 ℃ and 70 ℃;
the temperature control method of the UV photolysis purification equipment comprises the following steps:
setting a predetermined temperature threshold in the photolysis device cabinet (1): the preset temperature threshold comprises a first temperature threshold, a second temperature threshold and a third temperature threshold which are sequentially increased in temperature;
the temperature sensor acquires the temperature in the photolysis device box (1);
when the temperature value in the photolysis device box (1) is lower than a first temperature threshold value, stopping conveying waste gas into the photolysis device box (1), controlling a control system to control the UV lamp tube (5) in the UV photolysis lamp bank (4) to be fully opened and controlling a regulating valve (15) in the cooling water circulation system to be fully closed, and gradually increasing the temperature in the photolysis device box (1) due to continuous heating of the UV lamp tube (5); if the temperature value in the photolysis device box (1) exceeds the first temperature threshold and is lower than the second temperature threshold, waste gas is conveyed into the photolysis device box (1) through the air inlet (2), the control system controls the UV lamp tube (5) in the UV photolysis lamp bank (4) to be fully opened and controls the adjusting valve (15) in the cooling water circulation system to be opened, so that the cold water pipeline (13) takes away heat in the photolysis device box (1) and heat emitted by the UV lamp tube (5) to reach balance, and the temperature value in the photolysis device box (1) is constant between the first temperature threshold and the second temperature threshold; if the temperature value in the photolysis device box (1) exceeds the second temperature threshold and is lower than the third temperature threshold, the control system controls the opening number of the UV lamp tubes (5) in the UV photolysis lamp bank (4) to gradually decrease, the opening degree of the regulating valve (15) is gradually increased, and the cold water pipeline (13) takes away heat in the photolysis device box (1) which exceeds heat emitted by the UV lamp tubes (5), so that the temperature in the photolysis device box (1) is gradually decreased; if the temperature value in the photolysis device box (1) exceeds the third temperature threshold value, the control system controls all UV lamp tubes (5) in the UV photolysis lamp bank (4) to be closed, and the opening degree of the regulating valve (15) is regulated to the maximum value, so that the photolysis device box (1) is rapidly cooled;
waste gas to be treated enters the photolysis device box (1) through the gas inlet (2), and carbon dioxide and water vapor formed by final cracking and oxidation of waste gas molecules are discharged from the photolysis device box (1) through the gas outlet (3); wherein the first temperature threshold is 50 degrees centigrade, the second temperature threshold is 60 degrees centigrade, and the third temperature threshold is 70 degrees centigrade.
2. The method of claim 1, wherein the UV photolysis lamp bank (4) further comprises a lamp cover plate (8) for mounting the plurality of UV lamps (5) and separating the plurality of ballasts (6) and the plurality of UV lamps (5) in the photolysis device housing (1); the UV lamp tubes (5) are arranged in a manner that a plurality of UV lamp tubes are uniformly arranged at intervals in a direction perpendicular to a connecting line of the air inlet (2) and the air outlet (3).
3. The temperature control method of UV photolysis purification apparatus according to claim 2, wherein a plurality of columns are fixed on the side of the lamp cover plate (8) facing away from the UV lamp tube (5), an explosion door (9) for installing a plurality of ballasts (6) is rotatably installed on the columns through hinges, and a plurality of closing doors (10) are arranged on the casing of the photolysis device box (1) outside the explosion door (9).
4. A method for temperature control in UV photolysis purification apparatus according to claim 3, characterized in that the photolysis device cabinet (1) housing is provided with heat sinks (11) for diffusion of hot gas between the closing door (10) and the explosion vent (9) to the outside.
5. The method for controlling the temperature of a photolysis purification apparatus according to claim 1, wherein the cold water pipe (13) is fixed to the inner wall of the photolysis device housing (1) in a disk shape.
6. The method for controlling the temperature of a UV photolysis purification apparatus according to claim 5, wherein the photolysis device tank (1) and the closing door (10) are made of austenitic stainless steel.
7. The temperature control method of UV photolysis purification apparatus according to claim 1, wherein a HEPA filter screen is disposed at the gas inlet (2).
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| CN110721564A (en) * | 2019-08-29 | 2020-01-24 | 武汉时泰环保科技有限公司 | Positive pressure type explosion-proof UV photodissociation equipment |
| CN111013308A (en) * | 2019-11-26 | 2020-04-17 | 青岛腾坤包装有限公司 | UV photo-oxygen catalysis exhaust gas purifier |
| CN111249901A (en) * | 2020-03-09 | 2020-06-09 | 上海和达化工石油工程技术有限公司 | Organic waste gas catalytic oxidation equipment |
| CN111495100B (en) * | 2020-04-26 | 2022-08-30 | 安徽顺达环保科技股份有限公司 | Wet electric dedusting and cracking equipment and method for high-sulfur flue gas in boiler |
| CN112611088A (en) * | 2020-12-21 | 2021-04-06 | 佛山市顺德区美的电子科技有限公司 | Control method of air conditioner and air conditioner |
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