CN114082290A - Method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process - Google Patents
Method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process Download PDFInfo
- Publication number
- CN114082290A CN114082290A CN202111299691.6A CN202111299691A CN114082290A CN 114082290 A CN114082290 A CN 114082290A CN 202111299691 A CN202111299691 A CN 202111299691A CN 114082290 A CN114082290 A CN 114082290A
- Authority
- CN
- China
- Prior art keywords
- sodium hydroxide
- cod
- secondary steam
- alkali
- circulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 58
- 239000000149 chemical water pollutant Substances 0.000 title claims abstract description 24
- 238000001704 evaporation Methods 0.000 title claims abstract description 24
- 230000008020 evaporation Effects 0.000 title claims abstract description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 143
- 238000010521 absorption reaction Methods 0.000 claims abstract description 55
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 239000003513 alkali Substances 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000007921 spray Substances 0.000 claims abstract description 19
- 238000005507 spraying Methods 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 9
- 229910052708 sodium Inorganic materials 0.000 claims description 9
- 239000011734 sodium Substances 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 7
- 239000008399 tap water Substances 0.000 claims description 6
- 235000020679 tap water Nutrition 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 239000003337 fertilizer Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000013589 supplement Substances 0.000 claims description 2
- 230000036632 reaction speed Effects 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 description 8
- 238000001728 nano-filtration Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000001223 reverse osmosis Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- JSKQRADCWGNYQD-UHFFFAOYSA-N N.O.[Na] Chemical compound N.O.[Na] JSKQRADCWGNYQD-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
Abstract
The invention relates to the technical field of steam treatment, in particular to a method for deeply treating secondary steam COD in landfill leachate by an MVR evaporation process, which comprises the following steps: s1, adding 30% of sodium hydroxide into a sodium hydroxide tank, and conveying the sodium hydroxide into a hot well of the alkali spray absorption tower through a sodium hydroxide filling pump; s2, starting an alkali tower circulating pump communicated with the hot well, so that circulating absorption liquid in the hot well can be fully mixed with sodium hydroxide, and spraying into the alkali spraying absorption tower through a circulating pipeline and a spiral nozzle; the invention has simple structure, the COD absorption removal rate can reach 99 percent, and then the COD is directly absorbed in the state of secondary steam, the reaction speed is fast, the reaction is complete, the occupied area is small, the water quality of product water is clear, and no obvious peculiar smell exists.
Description
Technical Field
The invention relates to the technical field of steam treatment, in particular to a method for carrying out advanced treatment on secondary steam COD (chemical oxygen demand) in landfill leachate by an MVR (mechanical vapor recompression) evaporation process.
Background
Because the landfill leachate generated by the landfill site has the characteristics of high pollutant concentration and complex components, the conventional method is difficult to stably treat the landfill leachate reaching the standard and discharge, particularly for the landfill leachate with high COD, the exceeding of ammonia nitrogen and COD in the effluent is a common occurrence, and an MVR (mechanical vapor recompression) evaporation system has the advantages of mature technology, stable effluent reaching the standard, low energy consumption and the like, and is widely applied at present. In the process of treating landfill leachate by the MVR evaporation system, COD (chemical oxygen demand) with low molecular weight is easy to volatilize in the evaporation process (mainly volatile fatty acid), and enters condensed water along with secondary steam condensation, so that the condensed water exceeds the standard and cannot be stably discharged after reaching the standard.
The conventional treatment process of the landfill leachate wastewater with high COD in the prior art has the following problems:
the method has the advantages that the leachate is treated by a low-energy-consumption MVR evaporation + D.I ion exchange process route, and the treatment process is adopted more in the earliest period;
the main process flow has 3 processing units and is simpler. Effluent can be discharged up to the standard, but a large amount of product water needs to be wasted in the regeneration process of the ion exchange resin for back washing and forward washing, and a large amount of regenerated waste lye and regenerated waste liquid are also generated. Meanwhile, the resin belongs to a consumable product, the purchase price of the resin is high, and the service life of the resin is about 2 years generally.
Treating percolate by adopting a biochemical (MBR membrane biochemical reactor) and membrane treatment (NF nanofiltration or RO reverse osmosis) process route;
the leachate is treated by adopting a biochemical (MBR membrane biochemical reactor) + membrane treatment (NF nanofiltration or RO reverse osmosis) process route, the requirement on the effect of a biochemical treatment system is stricter, if the biochemical system is not well treated, the COD and the total nitrogen are easily not up to the standard, the water yield of NF nanofiltration clear liquid is about 50-80%, the yield of concentrated solution is about 20-50%, the amount of RO reverse osmosis concentrated solution is slightly smaller and is 20% at the beginning, and the amount of concentrated solution is rapidly increased due to the blockage of the membrane surface along with the time. If the concentrate is re-circulated into the landfill, while monovalent ions do not accumulate, the total TDS will continue to rise, again causing serious impacts or outages to the biochemical and NF systems themselves. The membrane life is about 2 years under normal maintenance.
Based on the above problems with the prior art, the applicant believes that it would be desirable to improve the process of treating the secondary steam.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a method for carrying out advanced treatment on secondary steam COD in landfill leachate by using an MVR evaporation process.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for carrying out advanced treatment on secondary steam COD in landfill leachate by an MVR evaporation process is designed, and comprises the following steps:
s1, adding 30% of sodium hydroxide into a sodium hydroxide tank, and conveying the sodium hydroxide into a hot well of the alkali spray absorption tower through a sodium hydroxide filling pump;
s2, starting an alkali tower circulating pump communicated with the hot well, so that circulating absorption liquid in the hot well can be fully mixed with sodium hydroxide, and spraying into the alkali spraying absorption tower through a circulating pipeline and a spiral nozzle;
s3, conveying the secondary steam to the central cylinder and the outer cylinder of the alkali spray absorption tower in sequence through the secondary steam inlet of the alkali spray absorption tower, enabling COD in the secondary steam to be in full contact reaction with the mixed liquid of the circulating absorption liquid sprayed by the spiral nozzle and the sodium hydroxide, enabling the sodium hydroxide and the COD to react to generate sodium aliphatate, intercepting the sodium aliphatate in the circulating absorption liquid, and discharging the purified secondary steam from the steam outlet communicated with the outer cylinder of the alkali spray absorption tower.
Preferably, a PH detector is arranged inside the hot well, and when the PH of the circulating absorption liquid is detected to be lower than 12, the external control unit controls the sodium hydroxide filling pump to add sodium hydroxide additionally.
Preferably, a liquid level detection instrument is arranged in the hot well, when the liquid level of the circulating absorption liquid is detected to be higher than a set value, a pneumatic valve on a discharge pipe communicated with the circulating pipeline is controlled to be opened through an external control unit, the circulating absorption liquid is discharged to a concentrated liquid pool or a waste liquid pool for further treatment, and the generated sodium aliphatate can be further processed into fertilizer for direct use.
Preferably, the discharge pipe is provided with a flushing port and a one-way valve C.
Preferably, a temperature detecting instrument is arranged in the hot well, and when the temperature of the circulating absorption liquid is detected to be higher than a set value, the external control unit controls the sodium hydroxide filling pump to be closed and stop entering the sodium hydroxide.
Preferably, the top of alkali spraying absorption tower is equipped with high-efficient defroster, high-efficient defroster sets up between central barrel and outer barrel for prevent that alkali lye from smuggleing secretly and causing the influence to follow-up unit.
Preferably, the alkali spraying absorption tower further comprises a water inlet pipeline, wherein the water inlet pipeline comprises a hot water pipe and a tap water pipe, and the hot water pipe and the tap water pipe are communicated and are communicated with the alkali spraying absorption tower through a ball valve A and a one-way valve A.
Preferably, a one-way valve B and a ball valve B are arranged on the conveying pipeline of the sodium hydroxide filling pump.
Preferably, the circulating pipeline is connected with a discharge port through a ball valve C, and the circulating pipeline is provided with a manual valve for opening and closing the spiral nozzle.
Preferably, the top of the alkali spray absorption tower is provided with a direct discharge port communicated with the outer cylinder.
The invention provides a method for carrying out advanced treatment on secondary steam COD in landfill leachate by an MVR evaporation process, which has the beneficial effects that: the device has a simple structure, the COD absorption removal rate can reach 99% at most, and then the COD is directly absorbed in a secondary steam state, so that the reaction speed is high, the reaction is complete, the occupied area is small, the water quality of product water is clear, no obvious peculiar smell exists, 30% sodium hydroxide is easily obtained, the unit price is low, the treatment cost per ton of water is low, and compared with the prior art, the device does not have the problems of large amount of regenerated waste hydrochloric acid and regenerated waste liquid in MVR evaporation and D.I ion exchange processes; the consumption of products is avoided, the sealing rubber mat or the mechanical seal of the water pump is replaced daily, the problem of salt accumulation in the biochemical (MBR membrane biochemical reactor) + membrane treatment (NF nanofiltration or RO reverse osmosis) process is avoided, the sodium hydroxide directly absorbs COD to produce sodium ammonium hydroxide, the design is reasonable, and the practicability is high.
Drawings
FIG. 1 is a schematic structural diagram of a method for deep treatment of secondary steam COD in landfill leachate by an MVR evaporation process provided by the invention.
In the figure: 1. a sodium hydroxide tank; 2. a sodium hydroxide filling pump; 3. an alkali spray absorption tower; 4. a hot well; 5. an alkali tower circulating pump; 6. a circulation pipe; 7. a spiral nozzle; 8. a central cylinder; 9. an outer cylinder; 10. a secondary steam inlet; 11. a steam outlet; 12. a pH detection instrument; 13. a liquid level detection instrument; 14. a discharge pipe; 15. a pneumatic valve; 16. a high-efficiency demister; 17. a water inlet pipeline; 18. a ball valve A; 19. a one-way valve A; 20. a check valve B; 21. a ball valve B; 22. a discharge port; 23. a manual valve; 24. flushing the opening; 25. a ball valve C; 26. a check valve C; 27. a temperature probe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, a method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process comprises the following steps:
s1, adding 30% of sodium hydroxide into a sodium hydroxide tank 1, and conveying the sodium hydroxide into a hot well 4 of an alkali spray absorption tower 3 through a sodium hydroxide filling pump 2;
s2, starting an alkali tower circulating pump 5 communicated with the hot well 4, so that circulating absorption liquid in the hot well 4 can be fully mixed with sodium hydroxide, and spraying into the tower of the alkali spray absorption tower 3 through a circulating pipeline 6 and a spiral nozzle 7;
s3, conveying the secondary steam to the central cylinder 8 and the outer cylinder 9 of the alkali spray absorption tower 3 in sequence through the secondary steam inlet 10 of the alkali spray absorption tower 3, so that COD in the secondary steam can be in full contact reaction with the mixed liquid of the circulating absorption liquid jetted by the spiral nozzle 7 and the sodium hydroxide, the sodium hydroxide and the COD react to generate sodium aliphatate, the sodium aliphatate is intercepted in the circulating absorption liquid, and the purified secondary steam is discharged from the steam outlet 11 communicated with the outer cylinder 9 of the alkali spray absorption tower 3.
Wherein, a PH detecting instrument 12 is arranged in the hot well 4, and when the PH of the circulating absorption liquid is lower than 12, the external control unit controls the sodium hydroxide filling pump 2 to supplement and add sodium hydroxide.
Further, a liquid level detecting instrument 13 is arranged in the hot well 4, when the liquid level of the circulating absorption liquid is detected to be higher than a set value, namely, a pneumatic valve 15 on a discharge pipe 14 communicated with the circulating pipeline 6 is controlled to be opened through an external control unit, the circulating absorption liquid is discharged to a concentrated liquid pool or a waste liquid pool for further treatment, the generated sodium aliphatate can be further processed into fertilizer for direct use, and a flushing port 24 and a one-way valve C26 are arranged on the discharge pipe 14.
In more detail, a temperature detecting instrument 27 is arranged in the hot well 4, and when the temperature of the circulating absorption liquid is detected to be higher than a set value, the external control unit controls the sodium hydroxide filling pump 2 to be closed and stop entering the sodium hydroxide.
Further, the top that the absorption tower 3 was sprayed to alkali is equipped with high-efficient defroster 16, and high-efficient defroster 16 sets up between central barrel 8 and outer barrel 9 for prevent that alkali lye from smuggleing secretly leading to the fact the influence to follow-up unit, alkali sprays absorption tower, spiral nozzle and defroster and all adopts stainless steel material to make, ensures the acid and alkali-resistance corrosion and the high temperature resistance of each part.
It is worth noting that the alkali spraying absorption tower further comprises a water inlet pipeline 17, wherein the water inlet pipeline 17 comprises a hot water pipe and a tap water pipe, and the hot water pipe is communicated with the tap water pipe and is communicated with the alkali spraying absorption tower 3 through a ball valve A18 and a one-way valve A19.
Wherein, a one-way valve B20 and a ball valve B21 are arranged on the delivery pipeline of the sodium hydroxide filling pump 2.
In order to control the spiral nozzle 7, a discharge port 22 is connected to the circulation pipe 6 through a ball valve C25, and a manual valve 23 for opening and closing the spiral nozzle 7 is provided in the circulation pipe 6.
In the invention, the top of the alkali spray absorption tower 3 is provided with a direct discharge port communicated with the outer cylinder 9, and purified steam can be discharged into the air in a direct discharge mode.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A method for carrying out advanced treatment on secondary steam COD in landfill leachate by an MVR evaporation process is characterized by comprising the following steps:
s1, adding 30% of sodium hydroxide into a sodium hydroxide tank (1), and conveying the sodium hydroxide into a hot well (4) of an alkali spray absorption tower (3) through a sodium hydroxide filling pump (2);
s2, starting an alkali tower circulating pump (5) communicated with the hot well (4) to enable circulating absorption liquid in the hot well (4) to be fully mixed with sodium hydroxide, and spraying into the alkali spraying absorption tower (3) through a circulating pipeline (6) and a spiral nozzle (7);
s3, conveying the secondary steam to a central cylinder (8) and an outer cylinder (9) of the alkali spray absorption tower (3) in sequence through a secondary steam inlet (10) of the alkali spray absorption tower (3), enabling COD in the secondary steam to be in full contact reaction with a mixed liquid of circulating absorption liquid and sodium hydroxide sprayed by a spiral nozzle (7), enabling the sodium hydroxide and the COD to react to generate sodium aliphatate, intercepting the sodium aliphatate in the circulating absorption liquid, and discharging the purified secondary steam from a steam outlet (11) communicated with the outer cylinder (9) of the alkali spray absorption tower (3).
2. The method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process according to claim 1, wherein the method comprises the following steps: and a pH detection instrument (12) is arranged in the hot well (4), and when the pH of the circulating absorption liquid is detected to be lower than 12, the external control unit controls the sodium hydroxide filling pump (2) to supplement and add sodium hydroxide.
3. The method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process according to claim 1, wherein the method comprises the following steps: a liquid level detection instrument (13) is arranged in the hot well (4), when the liquid level of the circulating absorption liquid is detected to be higher than a set value, a pneumatic valve (15) on a discharge pipe (14) communicated with the circulating pipeline (6) is controlled to be opened through an external control unit, the circulating absorption liquid is discharged to a concentrated liquid pool or a waste liquid pool for further treatment, and the generated sodium aliphatate can be further processed into fertilizer for direct use.
4. The method of claim 3, wherein the MVR evaporation process is used for advanced treatment of secondary steam COD in landfill leachate, and the method comprises the following steps: the discharge pipe (14) is provided with a flushing port (24) and a one-way valve C (26).
5. The method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process according to claim 1, wherein the method comprises the following steps: a temperature detecting instrument (27) is arranged in the hot well (4), and when the temperature of the circulating absorption liquid is detected to be higher than a set value, the external control unit controls the sodium hydroxide filling pump (2) to be closed and stop entering the sodium hydroxide.
6. The method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process according to claim 1, wherein the method comprises the following steps: the top of alkali spraying absorption tower (3) is equipped with high-efficient defroster (16), high-efficient defroster (16) set up between central barrel (8) and outer barrel (9) for prevent that alkali lye from smuggleing secretly leading to the fact the influence to follow-up unit.
7. The method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process according to claim 1, wherein the method comprises the following steps: the alkali spraying absorption tower is characterized by further comprising a water inlet pipeline (17), wherein the water inlet pipeline (17) comprises a hot water pipe and a tap water pipe, and the hot water pipe and the tap water pipe are communicated and are communicated with the alkali spraying absorption tower (3) through a ball valve A (18) and a one-way valve A (19).
8. The method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process according to claim 1, wherein the method comprises the following steps: and a one-way valve B (20) and a ball valve B (21) are arranged on the delivery pipeline of the sodium hydroxide filling pump (2).
9. The method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process according to claim 1, wherein the method comprises the following steps: the circulating pipeline (6) is connected with a discharge port (22) through a ball valve C (25), and the circulating pipeline (6) is provided with a manual valve (23) for opening and closing the spiral nozzle (7).
10. The method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process according to claim 1, wherein the method comprises the following steps: the top of the alkali spray absorption tower (3) is provided with a direct discharge port communicated with the outer cylinder (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111299691.6A CN114082290A (en) | 2021-11-04 | 2021-11-04 | Method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111299691.6A CN114082290A (en) | 2021-11-04 | 2021-11-04 | Method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114082290A true CN114082290A (en) | 2022-02-25 |
Family
ID=80299004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111299691.6A Pending CN114082290A (en) | 2021-11-04 | 2021-11-04 | Method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114082290A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101543723A (en) * | 2009-05-08 | 2009-09-30 | 大连汪洋环境工程有限公司 | Device and process for processing nitrogen-oxide waste gas containing acidic gas |
| CN104761094A (en) * | 2015-04-10 | 2015-07-08 | 中冶焦耐工程技术有限公司 | Method for processing coking wastewater employing efficient evaporation process |
| CN206680207U (en) * | 2017-04-25 | 2017-11-28 | 大连广泰源环保科技有限公司 | COD, the processing system of ammonia nitrogen in a kind of removal steam |
| CN109626684A (en) * | 2017-10-09 | 2019-04-16 | 中国石油化工股份有限公司 | The processing unit and its technique of high nitrate wastewater |
| CN109942043A (en) * | 2019-04-26 | 2019-06-28 | 中创水务科技环保(广东)有限公司 | A kind of percolate treating process and device |
| WO2019200590A1 (en) * | 2018-04-19 | 2019-10-24 | Kemira Oyj | Composition and method for pretreating landfill leachate on mechanical vapor recompression evaporation process |
| CN111111416A (en) * | 2020-02-26 | 2020-05-08 | 大连广泰源环保科技有限公司 | A novel gas washing system for landfill leachate handles |
| CN212283470U (en) * | 2020-04-29 | 2021-01-05 | 常州时升环境工程科技有限公司 | Secondary steam purification system |
-
2021
- 2021-11-04 CN CN202111299691.6A patent/CN114082290A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101543723A (en) * | 2009-05-08 | 2009-09-30 | 大连汪洋环境工程有限公司 | Device and process for processing nitrogen-oxide waste gas containing acidic gas |
| CN104761094A (en) * | 2015-04-10 | 2015-07-08 | 中冶焦耐工程技术有限公司 | Method for processing coking wastewater employing efficient evaporation process |
| CN206680207U (en) * | 2017-04-25 | 2017-11-28 | 大连广泰源环保科技有限公司 | COD, the processing system of ammonia nitrogen in a kind of removal steam |
| CN109626684A (en) * | 2017-10-09 | 2019-04-16 | 中国石油化工股份有限公司 | The processing unit and its technique of high nitrate wastewater |
| WO2019200590A1 (en) * | 2018-04-19 | 2019-10-24 | Kemira Oyj | Composition and method for pretreating landfill leachate on mechanical vapor recompression evaporation process |
| CN109942043A (en) * | 2019-04-26 | 2019-06-28 | 中创水务科技环保(广东)有限公司 | A kind of percolate treating process and device |
| CN111111416A (en) * | 2020-02-26 | 2020-05-08 | 大连广泰源环保科技有限公司 | A novel gas washing system for landfill leachate handles |
| CN212283470U (en) * | 2020-04-29 | 2021-01-05 | 常州时升环境工程科技有限公司 | Secondary steam purification system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106277591A (en) | Percolate nanofiltration concentrated solution processing method | |
| CN206173148U (en) | Energy -efficient seawater desalination equipment | |
| CN105366867A (en) | Single-effect multi-chamber mechanical compression evaporation device for processing high-salinity/high-organic-substance-content wastewater and method thereof | |
| CN103979627A (en) | Multistage efficient gas stripping system of ammonia nitrogen wastewater | |
| CN203807201U (en) | Multistage efficient air stripping system for ammonia nitrogen wastewater | |
| CN212283470U (en) | Secondary steam purification system | |
| CN211226612U (en) | Integrated treatment device for removing hydrogen sulfide in landfill leachate | |
| CN114082290A (en) | Method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process | |
| CN108275818B (en) | System for rapidly recycling ammonia nitrogen in high ammonia nitrogen livestock and poultry wastewater | |
| CN107857395B (en) | Condensate fine treatment regeneration wastewater ammonia recovery system | |
| CN104118949A (en) | A cold-rolling wastewater treating process | |
| CN207307550U (en) | A kind of deammoniation tower suitable for MVR evaporator indirect steams | |
| CN207330484U (en) | A kind of efficient deeply treating wastewater device of coupling type heterogeneous catalysis ozone | |
| CN105000736A (en) | Process method for nanofiltration concentrated liquor reduction of landfill leachate | |
| CN210528508U (en) | Ammonia-containing wastewater treatment system | |
| CN111514734A (en) | Device and method for treating ammonia nitrogen in desulfurization wastewater by using flue gas | |
| CN208414116U (en) | Positive-negative pressure integrated high-efficient deamination system | |
| CN108658350A (en) | Dry method dust blast furnace gas system ammonia nitrogen waste water treatment method and its system | |
| CN201871326U (en) | Scale inhibition and pollution-preventing device for membrane separation | |
| CN204958612U (en) | Energy saving and emission reduction purifier | |
| CN201154933Y (en) | Ozone purification device for recirculated cooling water of evaporative cooling air conditioner | |
| CN203768091U (en) | Two-stage heating and neutralizing device applicable to low-temperature acidic wastewater | |
| CN104386855A (en) | Method for preventing membrane filtration concentrated liquid from being scaled | |
| CN107043181A (en) | The Water Treatment in Circulating Cooling System of ozone cooperative film process | |
| CN108793549A (en) | Wet dedusting blast furnace gas system ammonia nitrogen waste water treatment method and its system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |