CN110813000A - Quenching oil fume waste gas treatment and collection process - Google Patents
Quenching oil fume waste gas treatment and collection process Download PDFInfo
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- CN110813000A CN110813000A CN201911107459.0A CN201911107459A CN110813000A CN 110813000 A CN110813000 A CN 110813000A CN 201911107459 A CN201911107459 A CN 201911107459A CN 110813000 A CN110813000 A CN 110813000A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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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
- B01D53/002—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 by condensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Abstract
The invention provides a quenching oil smoke waste gas treatment and collection process, and particularly relates to the field of environmental protection, wherein a quenching furnace is sealed by a birdcage type sealing cover, and waste gas is communicated with a variable frequency fan through a pipeline arranged at the side part of the sealing cover; the collected quenching oil smoke is sent to a subsequent air cooling unit through a pipeline connected with a variable frequency fan, and the temperature of the waste gas in the pipeline is reduced to 30-40 ℃; oil and moisture in the quenching oil fume waste gas carry partial impurities such as particulate matters and the like to be condensed and attached to the inner wall of the pipeline, and the condensed oil-water mixed liquid is periodically and manually cleaned and then sent out for treatment through a drain valve; carrying out multistage filtration treatment on the cooled oily waste gas; and (3) carrying out water spraying treatment on the quenching oil fume after multistage filtration, carrying out centrifugal dehydration, demisting through a folded plate, sending into an electrostatic oil removal device, and carrying out high-altitude discharge after adsorption through an activated carbon adsorption box. The invention can efficiently treat the quenching oil fume to meet the emission standard, has good treatment effect and can reduce environmental pollution.
Description
Technical Field
The invention belongs to the field of environmental protection, and particularly relates to a quenching oil fume waste gas treatment and collection process.
Background
The cooling liquid used for quenching is mainly cooling oil in the market at present, quenching oil fume is a large amount of oil fume generated when a high-temperature metal workpiece is placed in the cooling oil for cooling, and the quenching oil fume is different from catering oil fume and industrial oil fume, has complex oil fume components, contains carbon, smoke dust, and also contains benzopyrene, benzanthracene, carbazole and other poly aromatic hydrocarbons, and other complex oil fume, and has great environmental pollution if the quenching oil fume cannot be effectively treated in time;
the patent with the application number of 201821128286.1 discloses a quenching oil smoke collecting and purifying device, wherein a quenching oil groove of the device is divided into a quenching chamber and a lifting device chamber, a lifting motor is arranged at the top of the lifting device chamber of the quenching oil groove, an output shaft of the lifting motor faces downwards and is connected with a lead screw, two nuts are sleeved on the lead screw, a lifting platform is connected on the lower nut, a groove cover is connected on the upper nut, an oil smoke outlet is formed in the upper part of one side wall of the quenching chamber, the oil smoke outlet is connected to a spraying chamber, the bottom of the spraying chamber is connected with a purifying chamber, a variable frequency fan is arranged in the purifying chamber, a rotary filter element is connected to the front end of a front impeller disc, an arc-shaped guide plate is arranged at the lower part of the; this patent is through work piece quenching time slot lid closure, prevents the flue gas diffusion, collects and purifies the oil smoke, and rotatory filter core centrifugal force acts on, but this purification mode can't be suitable for on large-scale industrial processing
In view of the above, there is a need for a quenching oil smoke waste gas treatment and collection process, which can efficiently treat quenching oil smoke to meet emission standards, has a good treatment effect, and can reduce environmental pollution.
Disclosure of Invention
The invention aims to provide a quenching oil smoke waste gas treatment and collection process, which can efficiently treat quenching oil smoke so as to meet emission standards, has a good treatment effect and can reduce environmental pollution.
The invention provides the following technical scheme:
a quenching oil fume waste gas treatment and collection process comprises the following steps,
s1, sealing the quenching furnace generating quenching oil smoke at the temperature of 60-90 ℃ by a birdcage-shaped sealing cover, and communicating waste gas with a variable frequency fan through a pipeline arranged at the side part of the sealing cover; according to the oil smoke content and temperature in the quenching oil smoke, the variable frequency fan simulates the quenching operation process through a PLC control program, and the air suction amount and the air pressure of the fan are controlled to collect the quenching oil smoke;
s2, conveying the collected quenching oil smoke into a subsequent air cooling unit through a pipeline connected with a variable frequency fan; the air cooling device is arranged on the waste gas pipeline, the air cooling device rotates by using a fan, air around the pipeline is forced to flow through the outer surface of the waste gas pipeline at a high speed, and heat exchange is rapidly carried out by using the temperature difference between the air and the pipeline, so that the temperature of the waste gas in the pipeline is reduced to 30-40 ℃; utilize self kinetic energy that moisture oiliness waste gas gos forward in the pipeline, the fan of installation on the drive device rotates, rotates the centrifugal force that produces through the fan, gets rid of the device inner wall with tiny liquid drop in the waste gas after, relies on self gravity to converge to the lowest of pipe-line system, reaches the purpose of dewatering deoiling through the valve of regularly opening setting in this department.
The cooled quenching oil fume waste gas advances in the pipeline, oil and moisture carry partial impurities such as particulate matters and the like to be condensed and attached to the inner wall of the pipeline, the impurities automatically flow to the bottom of a U-shaped pipe arranged at the lowest part of the pipeline by virtue of the pumping force of a fan and gravity, and condensed oil-water mixed liquid is periodically manually cleaned through a drain valve and then is sent out for treatment; the cooled oil-containing waste gas is subjected to multi-stage filtration treatment,
And S3, carrying out water spraying treatment on the quenching oil fume after multi-stage filtration, carrying out centrifugal dehydration, demisting through a folded plate, sending into an electrostatic oil removal device, adsorbing through an activated carbon adsorption box, and then carrying out high-altitude discharge.
Preferably, the deep dehydration device consists of 1 centrifugal dehydration device with a circular section and 1 folded plate demisting device with a cuboid appearance. The humidity of the waste gas treated by the water spray tower is high, and after the waste gas enters the centrifugal dehydration device along the tangential direction, the saturated moisture in the waste gas is thrown to the inner wall of the equipment under the action of centrifugal force and is collected into a water collecting hopper at the bottom of the dehydration machine to be discharged due to the action of gravity, and the exhaust gas of the centrifugal dehydration machine is discharged from the top and then enters the folded plate demisting device for treatment; the folded plate defogging device outward appearance is the cuboid, and the less folded plate in clearance is equipped with along waste gas advancing direction in inside, and waste gas advances the in-process and the folded plate contact, and the moisture that contains condenses on the folded plate, because the effect of gravity falls into the drain tank periodic emission of folded plate defogging device bottom, and waste gas is discharged from the device other end and is sent into the treatment of electrostatic oil removal device.
Preferably, the electrostatic oil removal device is internally provided with a primary filtering part and an electrostatic field part. After the waste gas enters the device, primarily filtering the waste gas to remove particles and then entering an electrostatic field; the strong electric field makes the tiny oil particles in the waste gas charged into charged particles, and the charged particles reach the second part, namely the collecting electrode, and are immediately adsorbed on a polar plate with opposite charges, so that the aim of removing oil mist pollution is fulfilled; and (4) sending the exhaust of the electrostatic oil removal device into an active carbon adsorption device for treatment.
Preferably, after the waste gas enters the activated carbon adsorption device, a small amount of impurities such as particulate matters and the like carried in the waste gas are removed through the primary filtering device, then the waste gas enters the activated carbon adsorption layer for adsorption, and organic matters and the like contained in organic matters contained in the waste gas are adsorbed in pores inside the activated carbon by utilizing the huge specific surface area of the activated carbon, so that the purpose of purifying the waste gas is achieved; the purified waste gas enters the induced draft fan, is sucked into the exhaust funnel by the induced draft fan and is discharged in the upper air.
Preferably, the whole multi-stage filtering device is in a cuboid shape, and a multi-stage wire mesh is adopted as a filtering material in the multi-stage filtering device; when the oil-containing waste gas passes through the metal wire mesh, part of oil, moisture and the like are attached to the surface of the filter screen due to the interception effect of the metal wire mesh, and the oil, the moisture and the like are treated as hazardous waste after being regularly cleaned; the filtered waste gas is treated by a water spray tower;
preferably, the water spray tower takes water as spray liquid, and 2 layers of spray heads are arranged in the water spray tower; when in operation, the waste gas enters the tower from the bottom of the spray tower, and water drops sprayed from a spray header positioned at the middle upper part of the tower contact with the waste gas to intercept oil, organic matters and the like in the waste gas in water; and a circulating water tank is arranged at the bottom of the spraying tower, and water in the tank is pumped into the 2 layers of spraying heads by a circulating pump for recycling. Discharging the treated waste gas from a gas outlet at the top of the tower, and carrying out deep dehydration treatment; two layers of spraying devices are arranged in the spraying tower, and a demisting device is arranged above the spraying devices; the spray tower parameters were as follows: the spraying speed S is less than 0.8m/S, and the retention time t is approximately equal to 3-5S.
Preferably, an air outlet pipeline of the variable frequency fan is provided with a U-shaped pipe, and the lower end of the U-shaped pipe is provided with a drain valve.
Preferably, the variable frequency fan is a variable frequency fan, and the air volume variable is controlled by a PLC (programmable logic controller)
Preferably, the waste gas rises spirally in the dehydration device through the variable frequency fan during dehydration, and the variable frequency fan has the maximum air volume and air pressure within 1-2 min; properly reducing the air quantity and the air pressure within 2-4 min; 4-10 min, the air quantity and the air pressure are in a stable state; the temperature of the waste gas is raised by 5 to 10 ℃ through a heat exchanger for dehydration, wherein the dehydrated waste gas is discharged from the upper part of the dehydration device and sent into the electrostatic oil removal device, and the waste water oil is discharged from the lower part of the dehydration device
Preferably, the activated carbon adsorption tank is provided with a sandwich structure for placing activated carbon, and the upper end and the lower end of the sandwich structure are respectively provided with an inlet and an outlet for replacing the activated carbon.
The invention has the beneficial effects that:
the invention can efficiently treat the quenching oil smoke waste gas through the processes of filtering, spraying, dehydrating, deoiling and adsorbing so as to meet the emission standard, has good treatment effect and can reduce environmental pollution.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a flow chart of the apparatus of the present invention.
Detailed Description
As shown in fig. 1 and fig. 2, a quenching furnace for generating quenching oil smoke at 60-90 ℃ is sealed by a birdcage-shaped sealing cover, and waste gas is communicated with a variable frequency fan through a pipeline arranged at the side part of the sealing cover; according to the oil smoke content and temperature in the quenching oil smoke, the variable frequency fan simulates the quenching operation process through a PLC control program, and the air suction amount and the air pressure of the fan are controlled to collect the quenching oil smoke; the collected quenching oil smoke is sent to a subsequent air cooling unit through a pipeline connected with a variable frequency fan; the air cooling device is arranged on the waste gas pipeline, the air cooling device rotates by using a fan, air around the pipeline is forced to flow through the outer surface of the waste gas pipeline at a high speed, and heat exchange is rapidly carried out by using the temperature difference between the air and the pipeline, so that the temperature of the waste gas in the pipeline is reduced to 30-40 ℃; the cooled quenching oil fume waste gas advances in the pipeline, oil and moisture carry partial impurities such as particulate matters and the like to be condensed and attached to the inner wall of the pipeline, the impurities automatically flow to the bottom of a U-shaped pipe arranged at the lowest part of the pipeline by virtue of the pumping force of a fan and gravity, and condensed oil-water mixed liquid is periodically manually cleaned through a drain valve and then is sent out for treatment; carrying out multistage filtration treatment on the cooled oily waste gas; the multistage filtering device is integrally rectangular, and a multistage wire mesh is adopted as a filtering material in the multistage filtering device; when the oil-containing waste gas passes through the metal wire mesh, part of oil, moisture and the like are attached to the surface of the filter screen due to the interception effect of the metal wire mesh, and the oil, the moisture and the like are treated as hazardous waste after being regularly cleaned; the filtered waste gas is treated by a water spray tower; quenching oil smoke after multi-stage filtration is treated by water spraying, a water spray tower takes water as spray liquid, 2 layers of spray heads are arranged in the water spray tower, a demisting device is arranged above the spray device, and the parameters of the spray tower are as follows: the spraying speed S is less than 0.8m/S, and the retention time t is approximately equal to 3-5S; when in operation, the waste gas enters the tower from the bottom of the spray tower, and water drops sprayed from a spray header positioned at the middle upper part of the tower contact with the waste gas to intercept oil, organic matters and the like in the waste gas in water; and a circulating water tank is arranged at the bottom of the spraying tower, and water in the tank is pumped into the 2 layers of spraying heads by a circulating pump for recycling. Discharging the treated waste gas from a gas outlet at the top of the tower, and carrying out deep dehydration treatment; the deep dehydration device consists of 1 centrifugal dehydration device with a circular section and 1 folded plate demisting device with a cuboid appearance. The humidity of the waste gas treated by the water spray tower is high, after the waste gas enters the centrifugal dehydration device along the tangential direction, saturated moisture in the waste gas is thrown to the inner wall of the equipment under the action of centrifugal force, and is collected into a water collecting hopper at the bottom of the dehydration machine to be discharged due to the action of gravity, the waste gas is spirally lifted in the dehydration device through a variable frequency fan during dehydration, and the air volume and the air pressure of the variable frequency fan are the maximum within 1-2 min; properly reducing the air quantity and the air pressure within 2-4 min; 4-10 min, the air quantity and the air pressure are in a stable state; the temperature of the waste gas is raised by 5 to 10 ℃ through a heat exchanger, and the discharged gas of the centrifugal dehydrator is discharged from the top and then enters a folded plate demisting device for treatment; folded plate defogging device outward appearance is the cuboid, and the less folded plate in clearance is equipped with along waste gas advancing direction in inside, and waste gas advances in-process and folded plate contact, and the moisture that contains condenses on the folded plate, because the effect of gravity falls into the drain tank periodic discharge of folded plate defogging device bottom to after the folded plate defogging, send into the electrostatic oil removal device, establish preliminary filtration and electrostatic field two parts in the electrostatic oil removal device and constitute. After the waste gas enters the device, primarily filtering the waste gas to remove particles and then entering an electrostatic field; the strong electric field makes the tiny oil particles in the waste gas charged into charged particles, and the charged particles reach the second part, namely the collecting electrode, and are immediately adsorbed on a polar plate with opposite charges, so that the aim of removing oil mist pollution is fulfilled; and (4) sending the exhaust of the electrostatic oil removal device into an active carbon adsorption device for treatment.
After the waste gas enters the activated carbon adsorption device, a small amount of impurities such as particulate matters and the like carried in the waste gas are removed through the primary filtering device, then the waste gas enters the activated carbon adsorption layer for adsorption, and organic matters and the like contained in organic matters contained in the waste gas are adsorbed in the internal pores of the activated carbon by utilizing the huge specific surface area of the activated carbon, so that the aim of purifying the waste gas is fulfilled; the purified waste gas enters an induced draft fan, is sucked into an exhaust funnel by the induced draft fan and then is discharged at high altitude; and the activated carbon adsorption tank is provided with a sandwich structure for placing activated carbon, and the upper end and the lower end of the sandwich structure are respectively provided with an inlet and an outlet for replacing the activated carbon.
Experimental data: randomly taking 2 samples before quenching oil fume treatment, and numbering 1 and 2 respectively; randomly taking 6 samples of the quenching oil fume treated in the embodiment, and numbering 1a and 2a respectively; 1b, 2 b; 1c, 2 c;
the harmful substances are respectively detected, and the specific data are as follows:
the waste gas before treatment does not accord with JB8434-1996 Integrated emission Standard of air pollutants, and the treated waste gas accords with JB8434-1996 Integrated emission Standard of air pollutants, so the quenching oil fume waste gas can be efficiently treated by the processes of filtering, spraying, dehydrating, removing oil and adsorbing so as to accord with the emission Standard, the treatment effect is good, and the environmental pollution can be reduced;
although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A quenching oil smoke waste gas treatment and collection process is characterized by comprising the following steps:
s1, sealing the quenching furnace generating quenching oil smoke at the temperature of 60-90 ℃ by a birdcage-shaped sealing cover, and communicating waste gas with a variable frequency fan through a pipeline arranged at the side part of the sealing cover; according to the oil smoke content and temperature in the quenching oil smoke, the variable frequency fan simulates the quenching operation process through a PLC control program, and the air suction amount and the air pressure of the fan are controlled to collect the quenching oil smoke;
s2, conveying the collected quenching oil smoke into a subsequent air cooling unit through a pipeline connected with a variable frequency fan; the air cooling device is arranged on the waste gas pipeline, the air cooling device rotates by using a fan, air around the pipeline is forced to flow through the outer surface of the waste gas pipeline at a high speed, and heat exchange is rapidly carried out by using the temperature difference between the air and the pipeline, so that the temperature of the waste gas in the pipeline is reduced to 30-40 ℃; the cooled quenching oil fume waste gas advances in the pipeline, oil and moisture carry partial impurities such as particulate matters and the like to be condensed and attached to the inner wall of the pipeline, the impurities automatically flow to the bottom of a U-shaped pipe arranged at the lowest part of the pipeline by virtue of the pumping force of a fan and gravity, and condensed oil-water mixed liquid is periodically manually cleaned through a drain valve and then is sent out for treatment; the cooled oil-containing waste gas is subjected to multi-stage filtration treatment,
And S3, carrying out water spraying treatment on the quenching oil fume after multi-stage filtration, carrying out centrifugal dehydration, demisting through a folded plate, sending into an electrostatic oil removal device, adsorbing through an activated carbon adsorption box, and then carrying out high-altitude discharge.
2. The quenching oil smoke waste gas treatment and collection process according to claim 1, characterized in that: the deep dehydration device consists of 1 centrifugal dehydration device with a circular section and 1 folded plate demisting device with a cuboid appearance. The humidity of the waste gas treated by the water spray tower is high, and after the waste gas enters the centrifugal dehydration device along the tangential direction, the saturated moisture in the waste gas is thrown to the inner wall of the equipment under the action of centrifugal force and is collected into a water collecting hopper at the bottom of the dehydration machine to be discharged due to the action of gravity, and the exhaust gas of the centrifugal dehydration machine is discharged from the top and then enters the folded plate demisting device for treatment; the folded plate defogging device outward appearance is the cuboid, and the less folded plate in clearance is equipped with along waste gas advancing direction in inside, and waste gas advances the in-process and the folded plate contact, and the moisture that contains condenses on the folded plate, because the effect of gravity falls into the drain tank periodic emission of folded plate defogging device bottom, and waste gas is discharged from the device other end and is sent into the treatment of electrostatic oil removal device.
3. The quenching oil smoke waste gas treatment and collection process according to claim 1, characterized in that: the electrostatic oil removing device is internally provided with a primary filtering part and an electrostatic field. After the waste gas enters the device, primarily filtering the waste gas to remove particles and then entering an electrostatic field; the strong electric field makes the tiny oil particles in the waste gas charged into charged particles, and the charged particles reach the second part, namely the collecting electrode, and are immediately adsorbed on a polar plate with opposite charges, so that the aim of removing oil mist pollution is fulfilled; the exhaust gas of the electrostatic oil removal device is sent into an active carbon adsorption device for treatment
4. The quenching oil smoke waste gas treatment and collection process according to claim 1, characterized in that: after the waste gas enters the activated carbon adsorption device, a small amount of impurities such as particulate matters and the like carried in the waste gas are removed through the primary filtering device, then the waste gas enters the activated carbon adsorption layer for adsorption, and organic matters and the like contained in organic matters contained in the waste gas are adsorbed in the internal pores of the activated carbon by utilizing the huge specific surface area of the activated carbon, so that the aim of purifying the waste gas is fulfilled; the purified waste gas enters the induced draft fan, is sucked into the exhaust funnel by the induced draft fan and is discharged in the upper air.
5. The quenching oil smoke waste gas treatment and collection process according to claim 1, characterized in that: the multistage filtering device is integrally rectangular, and a multistage wire mesh is adopted as a filtering material in the multistage filtering device; when the oil-containing waste gas passes through the metal wire mesh, part of oil, moisture and the like are attached to the surface of the filter screen due to the interception effect of the metal wire mesh, and the oil, the moisture and the like are treated as hazardous waste after being regularly cleaned; the filtered waste gas is treated by a water spray tower;
6. the quenching oil smoke waste gas treatment and collection process according to claim 1, characterized in that: the water spray tower takes water as spray liquid and is internally provided with 2 layers of spray heads; when in operation, the waste gas enters the tower from the bottom of the spray tower, and water drops sprayed from a spray header positioned at the middle upper part of the tower contact with the waste gas to intercept oil, organic matters and the like in the waste gas in water; and a circulating water tank is arranged at the bottom of the spraying tower, and water in the tank is pumped into the 2 layers of spraying heads by a circulating pump for recycling. Discharging the treated waste gas from a gas outlet at the top of the tower, and carrying out deep dehydration treatment; two layers of spraying devices are arranged in the spraying tower, and a demisting device is arranged above the spraying devices; the spray tower parameters were as follows: the spraying speed S is less than 0.8m/S, and the retention time t is approximately equal to 3-5S.
7. The quenching oil smoke waste gas treatment and collection process according to claim 1, characterized in that: and a U-shaped pipe is arranged on an air outlet pipeline of the variable frequency fan, and a drain valve is arranged at the lower end of the U-shaped pipe.
8. The quenching oil smoke waste gas treatment and collection process according to claim 4, characterized in that: the variable frequency fan is a variable frequency fan, and the air quantity variable is controlled by a PLC
9. The quenching oil smoke waste gas treatment and collection process according to claim 1, characterized in that: during dehydration, the waste gas rises spirally in the dehydration device through the variable frequency fan, and the air volume and the air pressure are maximum when the variable frequency fan is used for 1 to 2 min; properly reducing the air quantity and the air pressure within 2-4 min; 4-10 min, the air quantity and the air pressure are in a stable state; the temperature of the waste gas is raised by 5 to 10 ℃ through a heat exchanger for dehydration, wherein the dehydrated waste gas is discharged from the upper part of the dehydration device and sent into the electrostatic oil removal device, and the waste water oil is discharged from the lower part of the dehydration device
10. The quenching oil smoke waste gas treatment and collection process according to claim 1, characterized in that: the activated carbon adsorption box is provided with an interlayer structure for placing activated carbon, and the upper end and the lower end of the interlayer structure are respectively provided with an inlet and an outlet for replacing the activated carbon.
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| CN111397386A (en) * | 2020-04-24 | 2020-07-10 | 安徽科技学院 | Isothermal quenching furnace waste gas and waste heat treatment device |
| CN111921323A (en) * | 2020-08-15 | 2020-11-13 | 巩义市恒铭金属制品有限公司 | Oil fume purification treatment method for industrial oil quenching |
| CN112755742A (en) * | 2020-12-31 | 2021-05-07 | 重庆派格机械设备有限责任公司 | High-temperature heavy oil sewage and waste gas treatment system |
| CN113862440A (en) * | 2021-08-25 | 2021-12-31 | 李宝杰 | Quenching device and quenching process thereof |
| CN113862440B (en) * | 2021-08-25 | 2023-11-17 | 河南四通精密模具有限公司 | Quenching device and quenching process thereof |
| CN114686670A (en) * | 2022-03-17 | 2022-07-01 | 浙江五洲新春集团股份有限公司 | Bearing quenching device with oil fume and waste gas treatment function |
| CN114686670B (en) * | 2022-03-17 | 2023-10-27 | 浙江五洲新春集团股份有限公司 | Bearing quenching device with oil smoke waste gas treatment function |
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