CN214457507U

CN214457507U - Tar deep-processing wastewater recycling treatment system

Info

Publication number: CN214457507U
Application number: CN202120307091.9U
Authority: CN
Inventors: 武新宇; 白正凯
Original assignee: Shanxi Feiyu Environmental Engineering Ltd By Share Ltd
Current assignee: Shanxi Feiyu Environmental Engineering Ltd By Share Ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-10-22
Anticipated expiration: 2031-02-03

Abstract

The utility model provides a tar deep-processing waste water retrieval and utilization processing system, belongs to tar waste water treatment technical field, mends the pond including oxidation pond, air supporting pond, carousel filter, equalizing basin, deamination equipment, MBR combination membrane cisterna, filter tank and circulating water that connect gradually, the oxidation pond is equipped with the entry that lets in waste water, be equipped with the medicament on the air supporting pond and add the mouth, the deamination technology that deamination equipment used is the ion exchange method, include multiple filter in the filter tank. By using the utility model, the pretreatment process in the earlier stage comprises ozone advanced oxidation, gaseous membrane deamination and MBR combined membrane tank, the tar wastewater is fully treated, all toxic elements in the tar wastewater are decomposed and synthesized into solid compounds, and finally, toxic substances and impurities are filtered out by a series of filters, and the filtered water can enter the circulating water replenishing tank for recycling; meanwhile, solid impurities generated in the treatment process can be evaporated and recycled through the MVR evaporation crystallizer.

Description

Tar deep-processing wastewater recycling treatment system

Technical Field

The utility model belongs to the technical field of tar waste water treatment, concretely relates to tar deep-processing waste water recycling treatment system.

Background

The production and processing process of mineral substances such as petroleum, coal and the like usually involves water washing treatment, during the water washing treatment, part of tar substances enter a water body to form tar waste water, as the name suggests, harmful components in the tar waste water are mainly tar, and the tar is a complex compound containing more than one hundred components, including organic substances such as alkane, aromatic hydrocarbon, colloid and the like. Besides tar, the tar wastewater also contains phenolic substances, ammonia nitrogen substances, cyanides and solid particles, and the wastewater contains high-concentration organic substances, cyanogens and other highly toxic substances, has high toxicity and complex components. The organic pollutants are mainly monocyclic or polycyclic aromatic compounds and heterocyclic compounds containing nitrogen, sulfur and oxygen, such as high-concentration phenol, naphthalene, aniline, pyridine, quinoline, benzopyrene, etc. Phenolic compounds are toxic to all organisms, they can inactivate cells and coagulate proteins; polycyclic aromatic hydrocarbons are carcinogenic and generally difficult to biodegrade.

The traditional treatment method of tar wastewater mainly comprises a gravity separation method and a filter screen or filter membrane adsorption method, but the oil removal rate of the methods is only 20-30% by weight, the treatment effect is generally poor and is difficult to meet the requirements, a large amount of tar substances still exist in water, the tar-containing wastewater is directly introduced into the subsequent process, the tar substances can influence the growth of microorganisms in a subsequent biochemical treatment system, so that the subsequent biochemical treatment effect is poor, ammonia nitrogen substances and phenolic substances in the wastewater are difficult to further remove, the biochemical oxygen demand (COD) of the water is not completely degraded, and the national water quality standard requirements cannot be met. Therefore, the treatment of tar wastewater, especially the removal of tar substances in wastewater, has been a problem in the water treatment industry, and the problem of utilizing solids generated in the treatment process of tar wastewater is still one of the problems which are difficult to solve in environmental protection.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that exists among the above-mentioned background art, improve tar waste water's treatment effect to the solid residue after will handling and the water after handling carry out cycle recycle, the utility model provides a tar deep-processing waste water retrieval and utilization processing system.

In order to realize the above-mentioned purpose, the utility model provides a tar deep-processing waste water recycling treatment system, including oxidation pond, air supporting pond, carousel filter, equalizing basin, deamination equipment, MBR combination membrane pond, filter tank and the circulating water that connects gradually mends the pond, the oxidation pond is equipped with the entry that lets in waste water, it adds the mouth to be equipped with the medicament on the air supporting pond, the equalizing basin is equipped with liquid caustic soda and adds the mouth, deamination equipment is equipped with absorption liquid and adds the mouth, be equipped with a plurality of filters in the filter tank.

Further, the oxidation pond is an ozone catalytic oxidation pond.

Further, a hollow fiber membrane required for gaseous membrane deamination is installed in the deamination equipment.

Further, still include MVR evaporative crystallizer, deamination equipment and filter tank are connected with MVR evaporative crystallizer respectively.

Further, MBR combination membrane cisterna is including the anaerobism pond, oxygen deficiency pond, good oxygen pond and the MBR pond that connect gradually, the anaerobism pond links to each other with deamination equipment, and the MBR pond links to each other with the filter pond.

Further, the filter tank comprises a multi-media filter, a high-energy sand filter, an activated carbon filter, a precision filter and a reverse osmosis filter which are connected in sequence, wherein the multi-media filter is connected with the MBR tank, and the reverse osmosis filter is connected with the MVR evaporation crystallizer.

Use the utility model has the advantages that: the system is provided with a plurality of pre-pretreatment processes for treatment, so that the biodegradability of the wastewater to be treated is fully improved, the tar wastewater to be treated is subjected to ozone advanced oxidation pretreatment to improve the biodegradability of the wastewater, and then sequentially passes through an air flotation tank, a rotary disc filter and deamination equipment to degrade high ammonia nitrogen, further improve the biodegradability of the wastewater and improve the upper limit of the treatment of the tar wastewater; the system is also provided with a plurality of reaction and filtration processes for full purification, the biodegradability of the wastewater is improved, then the wastewater passes through a novel combined MBR membrane tank for sequentially carrying out hydrolytic acidification, denitrification and nitrification to degrade COD/ammonia nitrogen, all toxic elements in the water are decomposed into solid compounds, finally, toxic substances and impurities are filtered out through a series of filters, and the filtered water can enter a circulating water replenishing tank for recycling; meanwhile, in the treatment process, the reaction liquid after the gaseous membrane deamination and the concentrated water left after final filtration are evaporated through an MVR evaporation crystallizer, and the evaporation crystals can be recycled.

Drawings

FIG. 1 is a schematic flow diagram of a preferred embodiment of the system for recycling and treating tar deep-processing wastewater of the present invention.

Wherein: 1. an oxidation pond; 2. an air floatation tank; 3. a rotary disc filter; 4. a regulating tank; 5. a deamination device; 6. MBR combined membrane tank; 61. an anaerobic tank; 62. an anoxic tank; 63. an aerobic tank; 64. an MBR tank; 7. a filter tank; 8. a multi-media filter; 9. a manganese sand filter; 10. an activated carbon filter; 11. a precision filter; 12. a reverse osmosis filter; 13. supplementing a pool with circulating water; 14. MVR evaporative crystallizer.

Detailed Description

To make the advantages, technical solutions and objects of the present invention clearer, the following describes preferred embodiments of the present invention in more detail with reference to the accompanying drawings.

Example 1: the utility model provides a tar deep-processing waste water recycling processing system which characterized in that: including oxidation pond 1, air supporting pond 2, carousel filter 3, equalizing basin 4, deamination equipment 5, MBR combination membrane tank 6, filter tank 7 and circulating water replenishing tank 13 that connect gradually, the utility model discloses the scheme that adopts lets tar waste water flow into oxidation pond 1 earlier, and oxidation pond 1 is ozone catalytic oxidation pond in this embodiment, mineralizes or decomposes most organic matters in the tar waste water in oxidation pond 1, flows into air supporting pond 2 after the complete reaction to add the flocculating agent through the medicament and make some compounds in the waste water form wadding grain or wadding block, and make some compound suspension stop air supporting pond 2 surfaces; the residual wastewater enters a rotary disc filter 3, and chemical compounds and floccules existing in the wastewater are filtered out through a rotary disc; then the wastewater enters a regulating tank 4, wherein the regulating tank 4 is arranged mainly for regulating the pH value of the wastewater according to the next procedure, regulating the inflow and outflow water amount, and controlling and buffering the flow rate of the water flow to a certain degree so as to improve the effect of the next procedure, and because the next procedure uses an acidic solution as an absorption liquid for deamination, the acidic solution and the absorption liquid need to be subjected to ion exchange, a liquid alkali agent needs to be added into the regulating tank 4 through a liquid alkali adding port to regulate the pH value of the tar wastewater to be alkaline; then, the wastewater enters a deamination device 5, in the embodiment, the deamination device 5 adopts an ion exchange method, a gaseous membrane deamination process is used for deamination, a hollow fiber membrane is arranged in the deamination device, a dilute sulfuric acid solution is added through an absorption liquid adding port and is used as an absorption liquid, tar wastewater flows inside the hollow fiber membrane, the dilute sulfuric acid solution flows with the tar wastewater in a cross flow manner outside the hollow fiber membrane, under an alkaline condition, ammonia in the wastewater is vaporized at the junction of the wastewater and a microporous membrane and diffuses through membrane pores to react with hydrogen ions in the dilute sulfuric acid solution, so that a highly concentrated and purified ammonium sulfate solution is obtained, the ammonia in the wastewater is removed, and finally, the deamination solution and the ammonium sulfate solution are obtained;

the deamination solution from the deamination equipment 5 enters an MBR combined membrane tank 6, wherein the MBR combined membrane tank 6 adopts a combined process of A/O and MBR, and the A/O method is anaerobic/anoxic and aerobic biochemical treatment, and comprises an anaerobic tank 61, an anoxic tank 62, an aerobic tank 63 and an MBR tank 64 which are connected in sequence, wherein tar wastewater flows into the anaerobic tank 61 after coming out of the deamination equipment 5, the anaerobic tank 61 utilizes the action of anaerobic bacteria to hydrolyze, acidify and methanate organic matters in the wastewater, remove the organic matters in the wastewater and improve the biodegradability of the wastewater, no dissolved oxygen exists in the anoxic tank 62, but nitrate exists, nitrate is removed through hydrolysis reaction, partial Biochemical Oxygen Demand (BOD) content in the wastewater can be reduced, the biodegradability of the wastewater is improved, and after pretreatment of the anaerobic tank 61 and the anoxic tank 62, organic pollutants in the wastewater are finally decomposed in the aerobic tank 63 through aerobic microorganisms in the aerobic tank, sludge-like flocs are produced, after which the produced solid particles are filtered by the MBR tank 64. Then flows into a filter tank 7, the filter tank 7 is provided with an internal filter type according to the type of tar wastewater and the requirement of subsequent circulating water, and in the embodiment, the filter tank 7 is internally provided with a multi-media filter 8, a manganese sand filter 9, an activated carbon filter 10, a precision filter 11 and a reverse osmosis filter 12 which are connected in sequence because the requirement of the subsequent circulating water is higher. The MBR tank 64 is connected with the multi-media filter 8, the multi-media filter 8 mainly removes suspended and colloidal impurities in water, the fierce sand filter 9 mainly removes pollutants such as colloid, iron, organic matters, pesticides, manganese, bacteria, viruses and the like in water, the activated carbon filter 10 mainly removes residual chlorine which cannot be removed in the previous stage of filtration so as to prevent a later stage reverse osmosis membrane from being oxidized and degraded, and simultaneously adsorbs pollutants such as micromolecule organic matters leaked from the previous stage, so that the active carbon filter has obvious adsorption and removal effects on peculiar smell, colloid, pigments, heavy metal ions and the like in liquid, good conditions are provided for subsequent reverse osmosis treatment, the precision filter 11 further removes oil stains and solid particles in the liquid, the filtration precision can reach 0.01 mu m, and finally the liquid enters the reverse osmosis filter 12 for final filtration, and the water passing through the reverse osmosis filter 12 meets the recycling requirement, then flows into the circulating water replenishing pool 13 to wait for recycling.

Example 2: essentially the same as the protocol of example 1, except that: the whole system further comprises an MVR evaporative crystallizer 14, and the deamination equipment 5 and a reverse osmosis filter 13 in the filter pool 7 are respectively connected with the MVR evaporative crystallizer 14. The MVR is a monomer evaporator, integrates multiple-effect falling film evaporators, and adopts sectional evaporation according to different required product concentrations, namely when the product cannot reach the required concentration after passing through the evaporation crystallizer for the first time, the product is pumped to the upper part again through an external pipeline by a vacuum pump at the lower part of the device after leaving the MVR evaporation crystallizer 14, so that the product passes through the MVR evaporation crystallizer 14 again, and then the method of repeatedly passing through the device is used for reaching the required concentration or crystals.

After deamination equipment 5, dilute sulfuric acid solution is used as absorption liquid and is deaminated, deamination solution and ammonium sulfate solution are finally obtained, deamination solution directly enters the next procedure, and ammonium sulfate solution is directly discharged, which wastes resources and harms the environment, so that the ammonia sulfate solution flows into the MVR evaporative crystallizer 14 to be evaporated and crystallized and then recycled, and meanwhile, the last filtered liquid passes through the reverse osmosis filter 12, the concentrated water impurities left after filtration also enter the MVR evaporative crystallizer 14 to be evaporated and crystallized and then recycled, and the treated solid crystal can be recycled.

Claims

1. The utility model provides a tar deep-processing waste water recycling processing system which characterized in that: pond (13) is mended including oxidation pond (1), air supporting pond (2), carousel filter (3), equalizing basin (4), deamination equipment (5), MBR combination membrane cisterna (6), filter pond (7) and circulating water that connect gradually, oxidation pond (1) is equipped with the entry that lets in waste water, be equipped with the medicament on air supporting pond (2) and add the mouth, equalizing basin (4) are equipped with liquid caustic soda and add the mouth, deamination equipment (5) are equipped with absorption liquid and add the mouth, be equipped with a plurality of filters in filter pond (7).

2. The recycling treatment system for tar deep processing wastewater according to claim 1, characterized in that: the oxidation pond (1) is an ozone catalytic oxidation pond.

3. The recycling treatment system for tar deep processing wastewater according to claim 1, characterized in that: and a hollow fiber membrane is arranged in the deamination equipment (5).

4. The recycling treatment system for tar deep processing wastewater according to claim 1, characterized in that: the deamination equipment (5) and the filter tank (7) are respectively connected with the MVR evaporative crystallizer (14).

5. The recycling treatment system for tar deep processing wastewater according to claim 1, characterized in that: MBR combination membrane cisterna (6) is including anaerobism pond (61), oxygen deficiency pond (62), good oxygen pond (63) and MBR pond (64) that connect gradually, anaerobism pond (61) links to each other with deamination equipment (5), and MBR pond (64) links to each other with filter pond (7).

6. The recycling treatment system for tar deep processing wastewater according to claim 1, characterized in that: the filter tank (7) comprises a multi-media filter (8), a high-energy sand filter (9), an activated carbon filter (10), a precision filter (11) and a reverse osmosis filter (12) which are connected in sequence, wherein the multi-media filter (8) is connected with an MBR tank (64), and the reverse osmosis filter (12) is connected with an MVR evaporation crystallizer (14).