CN213506408U - Small-particle oil shale dry distillation wastewater treatment and comprehensive utilization device - Google Patents
Small-particle oil shale dry distillation wastewater treatment and comprehensive utilization device Download PDFInfo
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- CN213506408U CN213506408U CN202022059016.3U CN202022059016U CN213506408U CN 213506408 U CN213506408 U CN 213506408U CN 202022059016 U CN202022059016 U CN 202022059016U CN 213506408 U CN213506408 U CN 213506408U
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Abstract
The utility model discloses a small-particle oil shale dry distillation wastewater treatment and comprehensive utilization device, which comprises a desulfurizing tower flue gas desulfurization device, a high ammonia nitrogen wastewater pretreatment device and a flue gas washing device, wherein the high ammonia nitrogen wastewater pretreatment device is communicated with a flue gas inlet of a desulfurizing tower, and the flue gas washing device is connected with a slurry outlet side of the desulfurizing tower; the flue gas washing device comprises a desulfurization slurry pump, a flue gas washing tower and a flue gas washing tower bottom pump, which are sequentially arranged on a pipeline at the outlet side of the desulfurization tower, an inlet slurry valve is arranged on the pipeline between the desulfurization slurry pump and the outlet of the desulfurization tower, and an outlet slurry valve is arranged on the pipeline between the desulfurization slurry pump and the flue gas washing tower. The utility model discloses but the high ammonia-nitrogen concentration waste water that innocent treatment oil shale dry distillation technology produced, still usable high ammonia-nitrogen concentration waste water carries out flue gas desulfurization, has very wide suitability for handle high ammonia-nitrogen concentration sewage treatment, carry out the desulfurization medicament to the flue gas and replace.
Description
Technical Field
The utility model relates to an environmental protection equipment specifically is a tiny particle oil shale dry distillation effluent treatment and comprehensive utilization device.
Background
The oil production industry by retorting the oil shale belongs to the national new energy and has stronger development prospect. Internationally, the american shale oil revolution has driven dramatic increases in crude oil production and profoundly influenced the international energy landscape. As a third country of shale oil storage, China is bound to be regarded as a shale oil field in the future along with the continuous maturity of exploration and development technologies. As a strategic area of conventional oil successors, the dream of the shale oil revolution is a vision of the petroleum industry in china. The environment-friendly technology and corresponding standard specifications matched with the method need to be formed, and the self-localization and the localization from tools to processes and from construction to technical services are realized.
The prior art discloses a method and a system for treating shale oil dry distillation sewage, which comprises the following steps: the pretreatment unit, the biochemical treatment unit and the advanced treatment unit are connected in sequence; wherein, the preprocessing unit includes: the device comprises a regulating tank, a mixing reaction tank, an oil separation sedimentation tank and an air floatation tank which are connected in sequence; the biochemical treatment unit includes: the hydrolysis acidification tank and the primary MBR tank are connected in sequence; the depth processing unit includes: the advanced oxidation system, the second-level MBR tank and the nanofiltration system are connected in sequence. The method comprises pretreatment, biochemical treatment and advanced treatment. The method can only treat the ammonia nitrogen wastewater with the concentration of less than 3500mg/l, and has high treatment cost and complex process.
Except the method and the system for treating the shale oil dry distillation sewage, most high ammonia nitrogen wastewater sewage treatment devices continue to adopt the technical means of stripping, ammonia distillation and the like, but all have the defects of high treatment cost, low ammonia removal efficiency, complex process, large equipment maintenance amount and insufficient start-up operation rate, and residues need to be conveyed to a biochemical plant for biochemical treatment and then discharged, so that the discharged place has heavy taste. In order to continuously meet the increasingly stringent requirements of national environmental emission standards, a more advanced treatment device for treating high ammonia nitrogen wastewater with free ammonia content of 10000mg/l to 30000mg/l is urgently needed.
SUMMERY OF THE UTILITY MODEL
The waste gas and the waste residue treatment process that produce among the dry distillation technology on the ground to the oil shale of prior art are with high costs, the not enough of technology complicacy, the to-be-solved problem of the utility model is to provide a high ammonia nitrogen waste water that not only can innocent treatment oil shale dry distillation technology produce, can also utilize high ammonia nitrogen waste water to carry out flue gas desulfurization's tiny particle oil shale dry distillation waste water treatment and comprehensive utilization device.
In order to solve the technical problem, the utility model discloses a technical scheme is:
the utility model provides a tiny particle oil shale dry distillation effluent treatment and comprehensive utilization device, including desulfurizing tower and flue gas desulphurization unit, still include high ammonia nitrogen waste water pretreatment device and flue gas washing device, wherein high ammonia nitrogen waste water pretreatment device communicates with the flue gas entry of desulfurizing tower, and flue gas washing device connects in the thick liquid outlet side of desulfurizing tower.
The high ammonia nitrogen wastewater pretreatment device comprises a high ammonia nitrogen wastewater tank and a high ammonia nitrogen wastewater pump, wherein the high ammonia nitrogen wastewater pump is installed on a pipeline between the high ammonia nitrogen wastewater tank and an inlet of the desulfurizing tower.
The flue gas washing device comprises a desulfurization slurry pump, a flue gas washing tower and a flue gas washing tower bottom pump, which are sequentially arranged on a pipeline at the outlet side of the desulfurization tower, an inlet slurry valve is arranged on the pipeline between the desulfurization slurry pump and the outlet of the desulfurization tower, and an outlet slurry valve is arranged on the pipeline between the desulfurization slurry pump and the flue gas washing tower.
The utility model discloses still have supplementary agitating unit, including disturbance pump inlet valve, disturbance pump and disturbance pump outlet valve, install in the desulfurization tower bottom outside in proper order through closed pipeline.
The utility model relates to a method that tiny particle oil shale dry distillation effluent treatment plant adopted includes following step:
1) filtering high ammonia nitrogen wastewater with different concentrations generated in different production process links in the small-particle oil shale dry distillation process, mixing and storing, and separating solids in the wastewater by combining a cyclone arranged in a storage tank to ensure that the solid content of the high ammonia nitrogen wastewater is lower than 0.01%;
2) an oil filter screen is combined with a hydraulic rotary oil catching device to separate, collect and recycle the residual light oil in the high ammonia nitrogen wastewater;
3) pumping the mixed and standing high ammonia nitrogen wastewater with the concentration of 30000mg/L to a flue gas desulfurization device through a high ammonia nitrogen wastewater pump for desulfurization treatment to generate a large amount of ammonium sulfite with ionic bonds and a small amount of ammonium sulfate;
4) the ammonium solution and the flue gas after the desulfurization treatment reaction have part of incompletely reacted ammonia and sulfur dioxide, and enter a desulfurization tower together; the desulfurization tower cools the unreacted feed again by using a circulating spray method, and the reaction is enhanced in the mass transfer process so as to ensure that the reaction is complete;
5) the slurry in the desulfurizing tower is oxidized by aeration, so that ammonium sulfite is completely oxidized into ammonium sulfate to generate more stable ammonium sulfate, the chemical reaction is balanced and shifted to the right, and the reaction rate of a circulating spray method is improved;
6) the PH value in the desulfurizing tower is monitored on line, the spraying amount of the high ammonia-nitrogen wastewater is adjusted along with the reduction or improvement of the PH value, and the optimal desulfurizing effect is controlled;
7) the fixed ionic bond ammonium sulfate solution is pumped out of the bottom of the desulfurization tower and is sent to an ash humidifier for secondary spraying of high-temperature hot ash.
When the desulfurization treatment is carried out in the step 3), aiming at the condition of secondary pollution caused by ammonia escape after the high-ammonia nitrogen wastewater is too high in concentration and reaches 10000 mg/L-30000 mg/L and is contacted with high-temperature flue gas, a mass transfer heat exchange spraying mode is used, namely, the wastewater is sprayed onto a baffle plate at the flue inlet of the desulfurization tower by using a plurality of superfine atomizing nozzles; the flue gas containing sulfur dioxide and the superfine atomized high ammonia nitrogen wastewater generate ion reaction to generate a large amount of ammonium sulfite and a small amount of ammonium sulfate with ionic bonds; free ammonia in the high ammonia nitrogen wastewater is converted into fixed ammonia.
The utility model has the following beneficial effects and advantages:
1. the utility model discloses a tiny particle oil shale dry distillation sewage treatment plant, by parts such as tank field, pump house, technology pipeline, valves and DCS control system constitute, high ammonia nitrogen waste water that not only can innocent treatment oil shale dry distillation technology produce, can also utilize high ammonia nitrogen waste water to carry out flue gas desulfurization, belong to the environmental protection technique, it has very wide suitability, can be used to handle high ammonia nitrogen sewage treatment, can be used to carry out desulfurization medicament substitution to the flue gas again.
2. The utility model uses the high ammonia nitrogen wastewater as the desulfurization agent for flue gas desulfurization, can avoid the treatment of the high ammonia nitrogen wastewater, and saves the repeated investment of wastewater treatment; the wet desulphurization device is combined, the use cost of desulphurization reagent is avoided, and the method plays an important role in the aspects of environmental protection, waste resource utilization and the like related to oil production by the dry distillation of the oil shale.
3. The utility model discloses can accomplish the high ammonia-nitrogen concentration waste water treatment process that oil shale dry distillation produced, flue gas desulphurization unit, realize "10000 mg/L ~ 35000mg/L high ammonia-nitrogen concentration waste water innocent treatment", "entry flue gas sulfur dioxide concentration 1280ppm wet flue gas desulfurization", "dilute solution of ammonium sulfate fertilizer is watered sediment and is increased fertile soil of restoration", but the complete equipment DCS centralized control full journey, satisfy that pollutant on-line analysis data is up to standard and upload.
Drawings
FIG. 1 is a schematic structural view of the device for treating and comprehensively utilizing the dry distillation wastewater of the small-particle oil shale.
Wherein, 1 is the desulfurizing tower, 2 is the circulation spray pump, for the flue gas scrubbing tower, 4 is the desulfurization thick liquids pump, 5 is the export thick liquids valve, 6 is the entry thick liquids valve, 7 is the flue gas scrubbing tower bottom pump, 8 is the process water tank, 9 is high ammonia nitrogen wastewater tank, 10 is defogging spray water pump inlet valve, 11 is the defroster spray water pump, 12 is defogging spray water pump outlet valve, 13 is the electronic butterfly valve that sprays, 14 is the online analysis appearance of flue gas, 15 is high ammonia nitrogen wastewater pump, 16 is disturbance pump inlet valve, 17 is the disturbance pump, 18 is disturbance pump outlet valve, 19 is the flue gas exhauster.
Detailed Description
The invention will be further explained with reference to the drawings attached to the specification.
As shown in figure 1, the utility model provides a tiny particle oil shale dry distillation effluent treatment and comprehensive utilization device, including desulfurizing tower and flue gas desulphurization unit, still include high ammonia-nitrogen concentration waste water pretreatment device and flue gas washing device, wherein the flue gas entry intercommunication of waste water pretreatment device and desulfurizing tower, flue gas washing device connects in the thick liquid outlet side of desulfurizing tower.
The high ammonia nitrogen wastewater pretreatment device comprises a high ammonia nitrogen wastewater tank 9 and a high ammonia nitrogen wastewater pump 15, wherein the high ammonia nitrogen wastewater pump 15 is installed on a pipeline between the high ammonia nitrogen wastewater tank 9 and an inlet of the desulfurizing tower.
The flue gas washing device comprises a desulfurization slurry pump 4, a flue gas washing tower 3 and a flue gas washing tower bottom pump 7 which are sequentially arranged on a pipeline at the outlet side of the desulfurization tower, an inlet slurry valve 6 is arranged on the pipeline between the desulfurization slurry pump 4 and the outlet of the desulfurization tower, and an outlet slurry valve 5 is arranged on the pipeline between the desulfurization slurry pump 4 and the flue gas washing tower 3.
The utility model discloses still have supplementary agitating unit, including disturbance pump inlet valve 16, disturbance pump 17 and disturbance pump outlet valve 16, install in the desulfurization tower bottom outside in proper order through closed pipeline for improve absorption and chemical reaction efficiency, reduce the green high ammonia nitrogen waste water of free ammonia escape and spray atomizing and cooling mass transfer reaction plate.
The utility model discloses a working process and principle as follows:
the flue gas is sent to desulfurizing tower 1 through flue gas exhauster 19, and single flange level gauge is installed to desulfurizing tower 1, can show the liquid level in the tower, and desulfurizing tower 1 sprays the sulfur dioxide in the pump 2 circulation washing absorption flue gas through the circulation. The process water tank 8 can provide washing water for a demister arranged in the desulfurizing tower 1 through a demisting spray pump 11, and slurry after absorption reaction in the desulfurizing tower 1 is sent to the flue gas washing tower 3 through a desulfurizing slurry pump 4 and then is pressurized and conveyed to a slag pouring section through a flue gas washing tower bottom pump 7.
The high ammonia nitrogen wastewater in the high ammonia nitrogen wastewater tank 9 is sent to a flue gas inlet of the desulfurizing tower 1 through a high ammonia nitrogen wastewater pump 15 for adding a desulfurizing liquid. The flue gas reacts after contacting with the desulfurization agent, and then reversely contacts with the circulating spray material flow conveyed into the desulfurization tower 1 by the circulating spray pump 2 to generate the dilute solution of the ammonium salt with fixed ionic bonds, and the dilute solution returns to the tower. And after the flue gas is desulfurized, carrying out two-stage demisting through a demister to reach the emission index and discharge atmosphere.
The slurry in the tower is circulated and stirred and mixed by a disturbance pump 17, so that the uniformity is improved. The discharged flue gas is subjected to data monitoring through the online analyzer 14, and the data is transmitted to an environmental supervision office.
The utility model discloses the device can be handled the high ammonia-nitrogen concentration waste water of ammonia nitrogen content 10000mg/L ~ 30000mg/L that oil shale dry distillation produced, makes flue gas desulfurization entry sulfur dioxide content be less than 1280mg/m3The desulfurization method uses wet desulfurization. The formed product is dilute ammonium sulfate solution used for soil remediation after high-temperature waste residue backfilling.
The utility model relates to a processing method of tiny particle oil shale dry distillation effluent treatment plant includes following step:
1) filtering, mixing and storing the high ammonia nitrogen wastewater with different concentrations generated in different production process links in the small-particle oil shale dry distillation process, separating the solid in the wastewater by combining a cyclone arranged in a storage tank, ensuring that the solid content of the high ammonia nitrogen wastewater is lower than 0.01 percent, and providing possibility for subsequent atomization and reaction efficiency improvement;
2) an oil filter screen is combined with a hydraulic rotary oil catching device (arranged in a high ammonia nitrogen wastewater tank 9, which is the prior art), and the residual light oil in the high ammonia nitrogen wastewater is separated, collected and then recovered;
3) pumping the mixed and standing high ammonia nitrogen wastewater with the concentration of 30000mg/L to a flue gas desulfurization device by a high ammonia nitrogen wastewater pump 15 for desulfurization treatment to generate a large amount of ammonium sulfite and a small amount of ammonium sulfate with ionic bonds;
4) the ammonium solution and the flue gas after the desulfurization treatment reaction have part of incompletely reacted ammonia and sulfur dioxide, and enter a desulfurization tower together; the desulfurization tower cools the unreacted feed again by using a circulating spray method, and the reaction is enhanced in the mass transfer process so as to ensure that the reaction is complete;
5) the slurry in the desulfurizing tower is oxidized by aeration, so that ammonium sulfite is completely oxidized into ammonium sulfate to generate more stable ammonium sulfate, the chemical reaction is balanced and shifted to the right, and the reaction rate of a circulating spray method is improved;
6) the PH value in the desulfurizing tower is monitored on line, the spraying amount of the high ammonia-nitrogen wastewater is adjusted along with the reduction or improvement of the PH value, and the optimal desulfurizing effect is controlled;
7) the fixed ionic bond ammonium sulfate can not release free ammonia gas at the temperature of less than 200 ℃, and is in a tasteless pale yellow state; the ionic bond sulfur solution is pumped out of the bottom of the desulfurization tower and is sent to an ash humidifier for secondary spraying of high-temperature hot ash. Because the shale ash is calcined at the high temperature of 780 ℃, organic matters in the ash are completely decomposed and released. The ash residue is not enough in fertility after being backfilled into the mine, and vegetation can not grow. Through this process of utility model, these ammonium of being sneaked into in the lime-ash have effectively improved the lime-ash fertility, promote soil vegetation and ecological remediation.
When the desulfurization treatment is carried out in the step 3), aiming at the condition of secondary pollution caused by ammonia escape after the high-ammonia nitrogen wastewater is too high in concentration and reaches 10000 mg/L-30000 mg/L and is contacted with high-temperature flue gas, a mass transfer heat exchange spraying mode is used, namely, the wastewater is sprayed onto a baffle plate at the flue inlet of the desulfurization tower by using up to 36 superfine atomizing nozzles; the flue gas containing sulfur dioxide and the superfine atomized high ammonia nitrogen wastewater generate ion reaction to generate a large amount of ammonium sulfite and a small amount of ammonium sulfate with ionic bonds; the baffle with lower temperature simultaneously improves the reaction efficiency and reduces the escape rate of ammonia; the free ammonia in the high ammonia nitrogen wastewater is instantly converted into fixed ammonia.
The flue gas containing sulfur dioxide and the superfine atomized high ammonia nitrogen wastewater generate ion reaction to generate a large amount of ammonium sulfite and a small amount of ammonium sulfate with ionic bonds; the baffle with lower temperature simultaneously improves the reaction efficiency and reduces the escape rate of ammonia; the free ammonia in the high ammonia nitrogen wastewater is instantly converted into fixed ammonia.
The utility model discloses can accomplish the high ammonia-nitrogen concentration waste water treatment process that oil shale dry distillation produced, flue gas desulphurization unit, realize "10000 mg/L ~ 35000mg/L high ammonia-nitrogen concentration waste water innocent treatment", "entry flue gas sulfur dioxide concentration 1280ppm wet flue gas desulfurization", "dilute solution of ammonium sulfate fertilizer is watered sediment and is increased fertile soil of restoration", but the complete equipment DCS centralized control full journey, satisfy that pollutant on-line analysis data is up to standard and upload.
Claims (4)
1. The utility model provides a tiny particle oil shale dry distillation effluent treatment and comprehensive utilization device, includes desulfurizing tower and flue gas desulphurization unit, its characterized in that: still include high ammonia nitrogen wastewater pretreatment device and flue gas washing device, wherein high ammonia nitrogen wastewater pretreatment device and the flue gas entry intercommunication of desulfurizing tower, flue gas washing device connects in the thick liquid outlet side of desulfurizing tower.
2. The small-particle oil shale retorting wastewater treatment and comprehensive utilization device according to claim 1, characterized in that: the high ammonia nitrogen wastewater pretreatment device comprises a high ammonia nitrogen wastewater tank and a high ammonia nitrogen wastewater pump, wherein the high ammonia nitrogen wastewater pump is installed on a pipeline between the high ammonia nitrogen wastewater tank and an inlet of the desulfurizing tower.
3. The small-particle oil shale retorting wastewater treatment and comprehensive utilization device according to claim 1, characterized in that: the flue gas washing device comprises a desulfurization slurry pump, a flue gas washing tower and a flue gas washing tower bottom pump, which are sequentially arranged on a pipeline at the outlet side of the desulfurization tower, an inlet slurry valve is arranged on the pipeline between the desulfurization slurry pump and the outlet of the desulfurization tower, and an outlet slurry valve is arranged on the pipeline between the desulfurization slurry pump and the flue gas washing tower.
4. The small-particle oil shale retorting wastewater treatment and comprehensive utilization device according to claim 1, characterized in that: still have supplementary agitating unit, including disturbance pump inlet valve, disturbance pump and disturbance pump outlet valve, install in proper order in the desulfurization tower bottom outside through closed pipeline.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112159017A (en) * | 2020-09-18 | 2021-01-01 | 抚顺矿业集团有限责任公司页岩炼油胜利实验厂 | Device and method for treating and comprehensively utilizing small-particle oil shale retorting wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112159017A (en) * | 2020-09-18 | 2021-01-01 | 抚顺矿业集团有限责任公司页岩炼油胜利实验厂 | Device and method for treating and comprehensively utilizing small-particle oil shale retorting wastewater |
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