CN217479240U - Coating waste gas consumable-free washing and purifying device - Google Patents
Coating waste gas consumable-free washing and purifying device Download PDFInfo
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- CN217479240U CN217479240U CN202221119560.5U CN202221119560U CN217479240U CN 217479240 U CN217479240 U CN 217479240U CN 202221119560 U CN202221119560 U CN 202221119560U CN 217479240 U CN217479240 U CN 217479240U
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Abstract
The utility model discloses a coating waste gas does not have consumptive material washing purifier, the device is including the waste water buffer pool, electrochemical reactor, sediment liquid delayer, lacquer sediment concentrator and the lacquer sediment collection box that connect gradually, wherein the sediment liquid delayer with lacquer sediment concentrator still is connected to via the waste gas scrubber waste water buffer pool.
Description
Technical Field
The utility model relates to an application waste gas does not have consumptive material washing purifier belongs to the exhaust-gas treatment field.
Background
The waste gas and waste water of the coating production line are the core pollution sources for environmental protection treatment.
The coating waste gas is generally treated by water curtain washing as a pretreatment purification process for treating the coating waste gas. The method has the problems of large waste water amount, short water changing period, low interception efficiency of aerosol particles, which is only 20-30% on average, high cost of subsequent waste gas treatment and large load of purifying equipment. Moreover, for the organic wastewater generated by washing and coating waste gas by a water curtain, in order to recycle, AB agent, preservative, bactericide and the like need to be added continuously, the consumption of consumables is large, the amount of paint sludge is large, the subsequent cleaning work is difficult and the cost is high.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a coating waste gas does not have consumptive material washing purifier and method.
Specifically, the utility model provides a coating waste gas does not have consumptive material washing purifier, including the waste water buffer pool, electrochemical reactor, sediment liquid delayer, lacquer sediment concentrator and the lacquer sediment collection box that connect gradually, wherein the sediment liquid delayer with the lacquer sediment concentrator still is connected to via exhaust gas scrubber the waste water buffer pool.
The waste water buffer tank is used for temporarily storing coating waste water and balancing dynamic balance of backwater and water supply.
The wastewater buffer tank comprises a tank bottom aerator, a tank bottom stirrer and a submersible pump. The aeration machine at the bottom of the tank is used for distributing air to the bottom of the tank by adopting an air source outside the tank; the pool bottom stirrer is used for ensuring dynamic rolling of the wastewater; the submersible pump is used for lifting coating wastewater to enter the wastewater electrochemical reactor.
The electrochemical reactor is used for ionizing the coating wastewater and preparing a flocculating agent and cationic water.
The electrochemical reactor comprises an electrochemical reaction tank, an electrode plate group and a power supply control cabinet, wherein a water inlet of the electrochemical reactor is arranged at the lower part of the electrochemical reaction tank, a water outlet of the electrochemical reactor is arranged at the upper part opposite to the water inlet, and the electrode plate group is arranged on a bottom plate of the electrochemical reaction tank. The electrode plate group consists of a plurality of groups of electrode plates which are alternated by aluminum and iron, a bipolar mode is adopted, the distance between the electrode plates of the electrode plates is 22mm, the thickness of the electrode plates is more than 2mm, the electrode plates are vertically arranged and fully distributed on a bottom plate of the electrochemical reaction tank, and a reaction area accounts for 1/4 of the volume of the electrochemical reaction tank, so that wastewater entering from a water inlet of the electrochemical reactor is ensured to pass through the electrode plate group and then slowly rise; the power supply control cabinet provides an electrochemical reaction working power supply for the electrochemical reactor.
The slag-liquid delaminator is used for separating paint slag from reclaimed water.
The slag liquid demixer comprises a slag liquid demixing tank, a tank bottom aerator and two slag discharge pumps, wherein a water inlet of the slag liquid demixer is arranged at the lower part of the slag liquid demixing tank, and a water outlet of the slag liquid demixer is arranged at the middle upper part opposite to the water inlet. The tank bottom aerator is used for pumping ambient air into the tank bottom and uniformly distributing air; and the two slag discharge pumps are respectively used for pumping paint slag concentrated liquid on the upper layer of the water surface into the paint slag concentrator and pumping reclaimed water in a reclaimed water layer into the waste gas scrubber.
The paint slag concentrator is used for further separating slag from liquid of the paint slag concentrated liquid.
The paint residue concentrator uses a special automatic discharging paint residue centrifugal machine.
The paint slag recovery box is used for receiving dry slag discharged by the paint slag concentrator automatically.
The waste gas scrubber is used for receiving high-concentration cation reclaimed water from the slag liquid delayer and the paint slag concentrator, scrubbing the coating waste gas after mixing, and then sending the obtained coating waste water back to the waste water buffer tank.
The utility model also provides a no consumptive material washing purification method of application waste gas, including following step:
(1) introducing the coating wastewater into a wastewater buffer tank for temporary storage;
(2) introducing the coating wastewater in the wastewater buffer tank into an electrochemical reactor, ionizing the coating wastewater, and preparing a flocculating agent and cationic water;
(3) introducing ionized coating wastewater in an electrochemical reactor into a slag-liquid delayer, separating paint slag from reclaimed water, introducing a separated paint slag concentrated solution into a paint slag concentrator, and introducing separated reclaimed water into a waste gas scrubber;
(4) in the paint slag concentrator, further slag-liquid separation is carried out on paint slag concentrated liquid, the separated dry slag is sent into a paint slag recovery box for unified treatment, and the separated reclaimed water is sent into a waste gas scrubber;
(5) in the waste gas washer, after the reclaimed water from the slag liquid delayer and the paint slag concentrator is mixed, the coating waste gas is washed, and then the obtained coating waste water is sent back to the waste water buffer pool.
Wherein, the bottom of the wastewater buffer tank is aerated and stirred, so that the accumulation of sediment at the bottom of the tank is avoided.
The flow of the coating wastewater passing through the wastewater buffer tank is to ensure that the wastewater buffer tank is changed with water every 4 hours.
Wherein the retention time of the coating wastewater in the electrochemical reactor is 9-11 minutes, preferably 10 minutes.
The electrode plate group in the electrochemical reactor consists of a plurality of groups of electrode plates which are alternated by aluminum and iron, a bipolar mode is adopted, the distance between the electrode plates of the electrode plates is 22mm, the thickness of the electrode plates is more than 2mm, the electrode plates are vertically arranged and fully distributed on the bottom plate of the electrochemical reaction tank, and a reaction area accounts for 1/4 of the volume of the electrochemical reaction tank, so that the coating wastewater is ensured to pass through the electrode plate group and then slowly rise; and a power supply control cabinet is used for providing an electrochemical reaction working power supply for the electrochemical reactor, the provided working power supply is a high-voltage pulse direct-current power supply, and the highest pulse direct-current voltage is 15000v adjustable.
The electrochemical reactor is driven by a high-voltage pulse direct-current power supply to form a dynamic electric field area, coating wastewater generates an ionization reaction in the area, anions and an anode plate generate a corrosion reaction to form an aluminum alloy and iron compound flocculant, generated cations are mixed with water to form cation water, the flocculant and paint particles are adsorbed to form large floc particles, and the cation water activates reclaimed water.
Wherein, the retention time of the coating wastewater in the slag-liquid delayer is not less than 10 minutes, thereby ensuring thorough delaminating and controlling floc particles not to form large flocs.
And aerating the bottom of the slag-liquid delayer, so that flocculating constituent paint slag floats upwards to realize slag-liquid separation, and water at the lower part becomes clear reclaimed water, so that oxygen in the water is supplemented, and cations in the water are kept stable at an activated level.
Wherein the amount of the medium water fed into the waste gas scrubber in the slag-liquid delayer is 65-70%, preferably 70%.
The paint slag concentrator further separates slag from liquid of paint slag concentrated liquid by adopting a high-speed centrifugation technology, and the separation coefficient is more than 3000.
The waste gas scrubber fully washes the coating waste gas by adopting a filler waste gas washing technology, and the flow speed of washing control gas is below 1.2 m/min.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the utility model adopts the electrochemical reactor to ionize the coating wastewater and make flocculating agent and cationic water. The generated flocculating agent is produced by itself, so that the separation of slag and liquid is realized, chemical agents such as an AB agent and a deodorant are not required to be added additionally, and the expense of the chemical agents is reduced. The generated high-activation-energy cationic water efficiently washes and traps paint particles of the coating waste gas, the interception efficiency is more than 60%, the pressure of subsequent waste gas treatment equipment is reduced, and the cost of the waste gas treatment equipment is effectively reduced. And the high activation energy cation water also has the effects of sterilization and deodorization, prolongs the water changing period of the washing water, and reduces the waste water discharge cost and the water resource consumption.
2. The utility model discloses a coating waste gas does not have consumptive material washing purifier and method adopts the modularized design, and the overall arrangement is nimble, and on-the-spot strong adaptability, and full process automation control, and production is continuous, degree of automation is high, and the sludge volume that produces simultaneously is few, and the moisture content of discharge lacquer sediment is less than 70%, has reduced the useless treatment cost of danger with having had great application space at application trade, tanning trade, pharmacy trade, food industry, electroplating industry etc..
Drawings
Fig. 1 is a schematic flow diagram of the coating waste gas consumable-free washing and purifying device and method of the present invention.
Fig. 2 is a front sectional view of the wastewater buffer tank according to the embodiment of the present invention.
Fig. 3 is a front sectional view of an electrochemical reactor according to an embodiment of the present invention.
Fig. 4 is a front sectional view of the slag-liquid delaminator of the embodiment of the present invention.
Detailed Description
The invention will be further described with reference to specific embodiments, the advantages and features of the invention will become more apparent as the description proceeds. These examples are merely illustrative and do not limit the scope of the invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications are intended to be included within the scope of the invention.
Example 1
The coating waste gas of this embodiment does not have consumptive material washing purifier is including the waste water buffer pool, electrochemical reactor, sediment liquid delayer, lacquer sediment concentrator and the lacquer sediment collection box that connect gradually, wherein the sediment liquid delayer with the lacquer sediment concentrator still is connected to via the waste gas scrubber waste water buffer pool. As shown in fig. 1.
The waste water buffer tank is used for temporarily storing coating waste water and balancing dynamic balance of backwater and water supply.
The wastewater buffer tank comprises a tank bottom aerator, a tank bottom stirrer and a submersible pump. As shown in fig. 2. The aeration machine at the bottom of the tank is used for distributing air to the bottom of the tank by adopting an air source outside the tank, so that the accumulation of sediment at the bottom of the tank is avoided; the pool bottom stirrer is used for ensuring dynamic rolling of wastewater and avoiding aggregation of sediment at the pool bottom; the submersible pump is used for lifting coating wastewater and enabling the coating wastewater to enter the wastewater electrochemical reactor, and the flow of the submersible pump ensures that the wastewater buffer pool is changed with water every 4 hours. In this example, the wastewater buffer tank has a length of 2m, a width of 1m and a height of 1.2 m.
The electrochemical reactor is used for ionizing the coating wastewater to prepare a flocculating agent and cationic water.
The electrochemical reactor comprises an electrochemical reaction tank, an electrode plate group and a power supply control cabinet, wherein a water inlet of the electrochemical reactor is arranged at the lower part of the electrochemical reaction tank, a water outlet of the electrochemical reactor is arranged at the upper part opposite to the water inlet, and the electrode plate group is arranged on a bottom plate of the electrochemical reaction tank. As shown in fig. 3. The electrode plate group consists of a plurality of groups of electrode plates which are alternated by aluminum and iron, a bipolar mode is adopted, the distance between the electrode plates of the electrode plates is 22mm, the thickness of the electrode plates is more than 2mm, the electrode plates are vertically arranged and fully distributed on a bottom plate of the electrochemical reaction tank, and a reaction area accounts for 1/4 of the volume of the electrochemical reaction tank, so that wastewater entering from a water inlet of the electrochemical reactor is ensured to pass through the electrode plate group and then slowly rise; the power control cabinet is used for providing an electrochemical reaction working power supply for the electrochemical reactor, the provided working power supply is a high-voltage pulse direct-current power supply, and the highest pulse direct-current voltage is 15000v adjustable. In this embodiment, the electrochemical reactor has a length of 1m, a width of 1m, and a height of 1.2m, and the power control cabinet has a length of 0.4m, a width of 0.4m, and a height of 0.5 m.
The slag-liquid delaminator is used for separating paint slag from reclaimed water.
The slag-liquid delayer comprises a slag-liquid delaminating tank, a tank bottom aerator and two slag discharging pumps, wherein a water inlet of the slag-liquid delayer is arranged at the lower part of the slag-liquid delaminating tank, and a water outlet of the slag-liquid delayer is arranged at the middle upper part opposite to the water inlet. As shown in fig. 4. The tank bottom aerator is used for pumping ambient air into the tank bottom and uniformly distributing air; and the two slag discharge pumps are respectively used for pumping paint slag concentrated liquid on the upper layer of the water surface into the paint slag concentrator and pumping reclaimed water in a reclaimed water layer into the waste gas scrubber. In this embodiment, the slag-liquid separator has a length of 1m, a width of 1m and a height of 1.2 m.
The paint slag concentrator is used for further separating slag from liquid of the paint slag concentrated liquid.
The paint residue concentrator adopts a high-speed centrifugation technology, uses a special automatic-discharging paint residue centrifuge, and has a separation coefficient of more than 3000.
The paint slag recovery box is used for receiving the dry slag automatically discharged by the paint slag concentrator and performing unified treatment.
The waste gas scrubber is used for receiving high-concentration cation reclaimed water from the slag liquid delayer and the paint slag concentrator, scrubbing the coating waste gas after mixing, and then sending the obtained coating waste water back to the waste water buffer tank.
The waste gas scrubber adopts a filler waste gas scrubbing technology to fully scrub the coating waste gas, and the flow speed of scrubbing control gas is below 1.2 m/min.
The consumable-free washing and purifying method for the coating waste gas comprises the following steps:
(1) introducing the coating wastewater into a wastewater buffer tank for temporary storage, and balancing the dynamic balance of backwater and water supply;
(2) under the power action of a submersible pump, feeding the coating wastewater in the wastewater buffer tank into an electrochemical reactor, forming a dynamic electric field area under the driving of a high-voltage pulse direct-current power supply, carrying out ionization reaction on the coating wastewater in the area, carrying out corrosion reaction on anions and an anode plate to form an aluminum alloy and iron composite flocculant, mixing the generated cations with water to form cation water, adsorbing the flocculant and paint particles to form large floc particles, and activating the reclaimed water by the cation water;
(3) under the power action of a submersible pump, ionized coating wastewater in an electrochemical reactor is sent into a slag-liquid delayer, flocculent paint slag floats upwards under the action of aeration to realize slag-liquid separation, paint slag concentrated liquid on the upper part enters a paint slag concentrator under the drive of a slag discharge pump, water on the lower part becomes clear reclaimed water and flows out of a water outlet to enter a waste gas washer, and meanwhile, the aeration operation can also supplement oxygen in the water and keep cations in the water stable at an activated level;
(4) in the paint slag concentrator, further slag-liquid separation is carried out on paint slag concentrated liquid, the separated dry slag is sent into a paint slag recovery box for unified treatment, and the separated reclaimed water is sent into a waste gas scrubber;
(5) and in the waste gas washer, after the reclaimed water from the slag liquid delayer and the paint slag concentrator is mixed, the coating waste gas is washed, the obtained coating waste water is sent back to the waste water buffer pool, the operation is circulated, and the washing water is periodically replaced.
Wherein the retention time of the coating wastewater in the electrochemical reactor is 10 minutes, and the error is 9-11 minutes.
Wherein, the retention time of the coating wastewater in the slag-liquid delayer is not less than 10 minutes, thereby ensuring thorough delaminating and controlling floc particles not to form large flocs.
Wherein the amount of the medium water fed into the waste gas scrubber in the slag-liquid delayer is 70%.
Example 2
System improvement
In this example, according to the apparatus and method of example 1, a treatment system of a conventional coating exhaust gas scrubber and a waste water buffer tank in an automobile factory was modified in 2021 month, and was put into operation in the same month.
This example differs from example 1 in that: the volume of the wastewater buffer tank is 30t, and the flow rate in the wastewater buffer tank is 10m 3 The submersible pump of the/h feeds the coating waste water into the electrochemical reactor, and correspondingly the volume of the subsequent apparatus is also 10m 3 Processing power of/h; the flow rate of the slag-liquid delayer is 7m 3 The/h slag discharge pump sends the reclaimed water of the reclaimed water layer into the waste gas scrubber at the flow rate of 3m 3 And the/h slag discharge pump sends the paint slag concentrated solution on the upper layer into the paint slag concentrator.
(II) Water quality detection results
Please refer to table one for the water quality testing results.
Watch 1
(III) analyzing the operation effect:
1. when a flocculating agent is added into a traditional coating waste gas and wastewater treatment system to operate, the sludge cleaning operation of the bottom of the buffer tank is carried out every six months; after the improvement, the adding process of the flocculating agent is cancelled, the bottom of the pool does not need to be cleaned, and no sludge is deposited at the bottom of the pool.
And (3) analysis: after the electrochemical reactor is adopted, the alkaline flocculant formed by the generated aluminum ions and iron ions has strong polarity, high cation content, high purity and strong flocculation function, and does not deposit paint mud.
2. When a traditional coating waste gas and wastewater treatment system is added with a flocculating agent to operate, water is changed in a buffer tank every three to four months according to different production strengths; after the transformation, the addition flow of the flocculating agent is cancelled, and water does not need to be changed.
And (3) analysis: a large amount of strong oxidants, such as hydroxide ions, cations and the like, are generated in the wastewater treated by the electrochemical reactor due to ionization, and the oxidants kill bacteria, viruses, most organic molecules and other elements which can deteriorate the wastewater, thereby ensuring the water quality.
3. After the transformation, the treatment cost of the paint slag is saved by more than 50 percent on average per month.
And (3) analysis: the flocculating operation flocculant implemented by the electrochemical reactor has high purity, strong polarity, good trapping effect on tiny paint particles and short reaction time, and avoids the adhesive aggregation of the paint particles; the paint slag formed by the suspension subjected to electrochemical flocculation through solid-liquid separation and concentration of the high-speed centrifugal concentrator has low water content, no liquid drops fall on the ground during transportation, and the generation amount of waste slag is greatly reduced.
4. The atomizing nozzle of the waste gas scrubber is cleaned once every two months for the longest time before modification, and is repaired once in half a year after modification.
And (3) analysis: circulating water treated by the electrochemical reactor contains a large amount of cations such as iron ions, aluminum ions and the like, and is high-concentration cation recycled water; in the recycling process, the cation water continuously cleans the water pipe and the atomizing nozzle, so that the clogging of the nozzle and the pipeline is avoided.
5. After the filter is modified, the replacement frequency of the filter for filtering waste gas is reduced, and the replacement is changed from once every three months to once every half year.
And (3) analysis: the coating wastewater treated by the electrochemical reactor has good flocculation capture effect on paint mist particles, the cleaning capability of the ionized water is strong, and the exhaust concentration of waste gas is effectively reduced; the washing efficiency of the waste gas is improved by 50 percent, and the original washing and purifying efficiency of 40 percent is improved to 60 percent.
(IV) description of System parameters
1. The electrochemical reaction time is preferably 10 minutes, and the error is controlled to be +/-10%.
The reaction time is the residence time of the coating wastewater through the electrochemical reactor.
When the retention time is less than 10 minutes, liquid stratification is not obvious, the concentration of particles of suspension on the upper layer is too low, and the centrifugal solid-liquid separation efficiency of the subsequent concentrator is influenced.
After the retention time is longer than 10 minutes, the suspension becomes flocculated and floats on the liquid surface, so that the eccentric centrifugal facilities of the concentrator cannot normally perform solid-liquid separation operation.
2. 70% of the reuse water is the upper limit of the proportion of the reuse water, if the proportion of the reuse water is further increased, the flocculation particles of the reuse water are greatly increased, and flocculation blocks are easily generated to block a nozzle; the 65% of the reuse water is the lower limit of the proportion of the reuse water, and if the proportion of the reuse water is further reduced, the effect of trapping paint mist particles is greatly reduced due to insufficient concentration of cations in the water.
3. The 30% concentrate is the input of the transformation cost which is reduced as much as possible, because the unit flow cost of the concentrator is high, and the total input of the transformation cost can be greatly reduced by reducing the flow of the concentrator.
4. The aluminum-iron composite anode is adopted to obtain high-efficiency aluminum ion flocculant and iron ion flocculant, ensure the flocculation efficiency of the generated flocculant and avoid anode passivation.
Claims (5)
1. The utility model provides a coating waste gas does not have consumptive material washing purifier, its characterized in that, including the waste water buffer pool, electrochemical reactor, sediment liquid delayer, lacquer sediment concentrator and the lacquer sediment collection box that connect gradually, wherein the sediment liquid delayer with lacquer sediment concentrator still is connected to via the waste gas scrubber waste water buffer pool.
2. The apparatus of claim 1, wherein the wastewater buffer tank comprises a tank bottom aerator, a tank bottom agitator, and a submersible pump; the aeration machine at the bottom of the tank is used for distributing air to the bottom of the tank by adopting an air source outside the tank; the pool bottom stirrer is used for ensuring dynamic rolling of the wastewater; the submersible pump is used for lifting the coating wastewater to enter the electrochemical reactor.
3. The apparatus of claim 1, wherein the electrochemical reactor comprises an electrochemical reaction tank, an electrode plate group and a power control cabinet, the water inlet of the electrochemical reactor is arranged at the lower part of the electrochemical reaction tank, the water outlet of the electrochemical reactor is arranged at the upper part opposite to the water inlet, and the electrode plate group is arranged on the bottom plate of the electrochemical reaction tank.
4. The device of claim 3, wherein the electrode plate group is composed of a plurality of groups of electrode plates which are alternated by aluminum and iron, the bipolar mode is adopted, the distance between the electrode plates of the electrode plates is 22mm, the thickness of the electrode plates is more than 2mm, the electrode plates are vertically arranged and are fully distributed on the bottom plate of the electrochemical reaction tank, and the reaction zone occupies 1/4 of the volume of the electrochemical reaction tank, so that wastewater entering from the water inlet of the electrochemical reactor passes through the electrode plate group and then slowly rises.
5. The apparatus of claim 1, wherein the slag-liquid separator comprises a slag-liquid separating tank, a tank bottom aerator and two slag pumps, a water inlet of the slag-liquid separator is arranged at the lower part of the slag-liquid separating tank, and a water outlet of the slag-liquid separator is arranged at the middle upper part opposite to the water inlet; the two slag discharge pumps are respectively used for pumping paint slag concentrated liquid on the upper layer of the water surface into the paint slag concentrator and pumping reclaimed water in a reclaimed water layer into the waste gas scrubber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221119560.5U CN217479240U (en) | 2022-05-10 | 2022-05-10 | Coating waste gas consumable-free washing and purifying device |
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| CN202221119560.5U CN217479240U (en) | 2022-05-10 | 2022-05-10 | Coating waste gas consumable-free washing and purifying device |
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| CN217479240U true CN217479240U (en) | 2022-09-23 |
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