CN112573756A

CN112573756A - Integrated treatment equipment for treating coal chemical industry/coking wastewater

Info

Publication number: CN112573756A
Application number: CN202011616238.9A
Authority: CN
Inventors: 张智春; 王力强
Original assignee: Shanxi Boman Environment Treatment Co ltd
Current assignee: Shanxi Boman Environment Treatment Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-03-30

Abstract

The invention discloses integrated treatment equipment for treating coal chemical industry/coking wastewater, and relates to the technical field of coking wastewater treatment. Comprises a coagulating sedimentation area, an advanced oxidation and super-magnetic separation area, a deamination area, a filtration area and a control area; some equipment sled dress realizes integrating and convenient removal in the container. Aiming at the problem that residual coking/coal gasification wastewater cannot be effectively treated under the policy that heavily polluted enterprises such as coking/coal gasification gradually quit productivity, the method adopts integrated equipment to treat coking/coal gasification wastewater, and has the advantages of high reaction rate, high equipment integration, effective reduction of organic matters, ammonia nitrogen, petroleum, cyanides, total phosphorus, suspended matters and chromaticity which are difficult to biodegrade in the wastewater, and reduction of the influence of the coking/coal gasification wastewater on the surrounding ecological environment.

Description

Integrated treatment equipment for treating coal chemical industry/coking wastewater

Technical Field

The invention relates to the technical field of sewage treatment, in particular to coking/coal gasification sewage treatment integrated equipment.

Background

The coking/coal gasification wastewater is an industrial wastewater with complex components, high organic matter content, high salt content and toxic and harmful substances. At present, the coking/coal gasification industry steps into a capacity elimination period, some coking/coal gasification enterprises are closed successively, a wastewater treatment station stops running, and coking wastewater is intensively arranged in a buffer pool and is not treated. Coking wastewater can be discharged in an overproof manner due to the shutdown of a treatment station after a coking/coal gasification enterprise is shut down, and the coking wastewater inevitably causes great harm to human beings, aquatic products, crops and the whole environment. How to solve the problem of environmental pollution caused by the shutdown of the wastewater of the coking enterprises becomes a major problem to be solved urgently for people.

The advanced oxidation technology is a well-known effective mode for treating high-difficulty organic matters, has the advantages of high reaction speed, high efficiency and the like, and has a plurality of applications in degrading difficult-to-biochemically-treated wastewater.

The integration of water treatment equipment is a great trend in the development of the current and future environmental protection industry, and is particularly aimed at the heavy pollution enterprises which are about to shut down. The invention adopts demulsification and pre-precipitation modes to remove petroleum, total phosphorus, suspended matters and colloid in the coking/coal gasification wastewater, so that the content of the suspended matters in the wastewater is greatly reduced. Other soluble organic matters which are difficult to be biochemically treated and cyanides are forcibly oxidized by an advanced oxidation method, broken chains are broken and are reduced to low-molecular organic matters which can be biochemically treated, ammonia nitrogen is removed by a high-temperature reaction zone and pH adjustment, and finally a filtering system is arranged to further remove suspended matters in water so as to convert the suspended matters into wastewater which is low-toxic or nontoxic to the environment.

Disclosure of Invention

The invention provides a coking/coal gasification sewage treatment integrated device, which adopts the process combination of an emulsion breaking air flotation tank, an advanced oxidation and super-magnetic separator, a high-temperature deaminator and a filter, reduces petroleum pollutants, total phosphorus, suspended matters, partial suspended COD and petroleum pollutants of coking/coal gasification sewage in the early stage, further removes dissolved COD and cyanides which are difficult to be biochemically treated by adopting an advanced oxidation method, removes ammonia nitrogen by adopting a pH adjusting and high-temperature reaction tank, and finally further removes suspended matters in the wastewater by filtering to reduce the concentrations of the COD, the ammonia nitrogen, the petroleum, the cyanides, the total phosphorus and the suspended matters so as to convert the wastewater into low-toxicity or non-toxicity wastewater.

The technical scheme of the invention is realized as follows:

coking/coal gasification sewage firstly enters an adjusting tank, after the coking/coal gasification sewage is fully homogenized in the adjusting tank, the coking/coal gasification sewage enters a first air flotation module by adopting a pumping mode, a demulsifier and a flocculating agent adding device are arranged beside an air flotation reactor, and the first air flotation module is connected with the air flotation reactor through a dosing pipe; the water discharged from the air flotation module is pumped into a second advanced oxidation and super-magnetic separation module, the advanced oxidation reactor is an independent reactor with a stirring device, an oxidant, an activating agent and a magnetic powder adding barrel are arranged in a container beside the advanced oxidation reactor and are connected with the advanced oxidation reactor through a medicine adding pump and a medicine adding pipe, and the water discharged from the advanced oxidation reactor enters a super-magnetic separator for rapid mud-water separation; the water discharged by the second advanced oxidation and super-magnetic separation module enters the third deamination module under the lifting of a pump, an alkaline agent dosing tank is arranged in the second super-magnetic separation container and is connected with a high-temperature reaction tank through a dosing pump, a stirrer is arranged in the reaction tank to enhance gas-liquid exchange, a gas collecting pipe is arranged at the top of the reaction tank to collect ammonia gas and is externally connected with an absorption device, and a water outlet is positioned at the lower part of the reaction tank; the water discharged by the third deamination module is pumped into a fourth filtering module by a pump, and firstly enters a cooling and neutralizing area, the outlet of the fourth filtering module is connected with a shallow sand filter, and the outlet of the sand filter is connected with a main water outlet pipe of the container; the automatic control of the whole integrated processing equipment is arranged in a fifth control module, and each module adopts the mobile and skid-mounted design.

Preferably, the first air flotation module is a pressurized dissolved air flotation machine skid-mounted in a first container, an air flotation dosing tank is connected with an air flotation machine body through a skid-mounted facility, and petroleum pollutants, total phosphorus and partial suspended COD in a water body are removed in a demulsification-flocculation-slag scraping mode; the water inlet pipe, the water outlet pipe and the mud outlet pipe are connected out of the air flotation machine body, and the interfaces are arranged on the outer side of the container.

Preferably, the second advanced oxidation and super-magnetic separation module consists of an advanced oxidation reactor and a super-magnetic separation container, and the dosing area, the magnetic powder adder, the flocculation reaction area and the super-magnetic separation host are positioned in the container; the medicine adding area consists of oxidant, activator and pH regulator medicine adding equipment; the super-magnetic separation host machine adopts a neodymium iron boron magnet as a separation facility of the nuclear separator; cyanide and partial COD in the water body are effectively removed through the advanced oxidation reactor, and the organic matters which are difficult to biodegrade are broken; the effluent of the advanced oxidation reactor enters a magnetic separation host to rapidly separate precipitates generated in the oxidation process; the water inlet pipe, the water outlet pipe, the dosing pipe and the mud outlet pipe are arranged on the outer side of the container.

Preferably, the advanced oxidation technology adopts a Fenton oxidation technology/persulfate oxidation technology, and the oxidant adopts hydrogen peroxide/peroxydisulfate; the activator adopts micron-sized zero-valent iron/ferrous oxide/ferroferric oxide.

Preferably, the advanced oxidation reactor is made of 316L stainless steel/glass fiber reinforced plastic.

Preferably, the third deamination module is provided with an independent closed reactor structure, a medicine adding tank is not arranged beside the reactor, a pH regulator in the second container is used for adding medicine, and a medicine adding pipe is connected with the third deamination module; the top of the reactor is provided with a gas collecting pipe to lead out ammonia gas in the third container and then adopts liquid to absorb the ammonia gas.

Preferably, the third high-temperature reaction tank adopts a low-pressure steam or electric heating mode, the reaction temperature is 55-85 ℃, and a heat-insulating layer is arranged outside the high-temperature reaction tank.

Preferably, the No. four filter modules are skid-mounted in a container by adopting a cooling neutralization pond and a shallow sand filter, and are used for further cooling, neutralizing and removing residual suspended matters in the water body.

Preferably, all the equipment automatic control adopts PLC control, the control box is prized in the five containers and is connected with each container through cables; all on-line monitoring facilities are arranged in a fifth container and comprise an SS determinator, a COD determinator and an ammonia nitrogen determinator.

Preferably, the beneficial effects of the invention are as follows:

the invention provides a coking/coal gasification sewage treatment integrated device which comprises an air floatation module arranged in a container I for removing petroleum pollutants, total phosphorus and partial suspended COD in a water body, a super-magnetic separation module of advanced oxidation comprising an advanced oxidation reaction zone and a super-magnetic separation container, a high-temperature ammonia nitrogen removal reactor arranged in a deamination module III, a cooling neutralization pond and a shallow sand filter arranged in a container IV, an instrument and a meter arranged in a container V and a control module.

The invention solves the problem that residual coking wastewater generated by coking/coal gasification enterprises is gathered in a closed wastewater treatment station and can not be discharged because the capacity is eliminated or upgraded. The equipment has the advantages of high integration level, vehicle-mounted transportation, high pollutant degradation efficiency and the like, avoids the harm of coking/coal gasification wastewater to human health and environment, and belongs to high-efficiency and green wastewater integrated treatment equipment.

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below.

FIG. 1 is an integrated treatment equipment for treating coal chemical industry/coking wastewater according to the invention.

Drawings

FIG. 1 is a schematic structural view of the present invention;

description of reference numerals: 1-total water inlet; 2-air flotation module water outlet; 3-water outlet of advanced oxidation reactor; 4-water outlet of the ultra-magnetic separation container; 5-water outlet of high temperature reaction tank; 6-total water outlet; 7-sludge outlet;

11-air compressor and piping; 12-air floating dosing tank and piping system; 13-air flotation zone; 14-slag scraper; 15-clear water zone;

21-advanced oxidation reaction zone; 22-dosing zone; 23-magnetic powder adding machine; 24-super magnetic separation main machine; 25-magnetic powder recovery machine; 26; a flocculation reaction tank;

31-reaction zone for removing ammonia and nitrogen; 32-ammonia collecting tube; 33-steam heating or electric heater;

41-Cooling the neutralization tank; 42-shallow sand filter.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms described above will be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, coking/coal gasification wastewater enters an air flotation tank through a main water inlet 1, enters a high-grade oxidation reaction zone through a water outlet 2 of an air flotation module, enters a super-magnetic separation container through a water outlet 3 of a high-grade oxidation reactor, enters a high-temperature deammoniation reactor through a water outlet 4 of the super-magnetic separation container, enters a cooling neutralization tank through a water outlet 5 of the high-temperature reaction tank, and is discharged out of a system through a main water outlet 6; all the sludge is collected to a sludge outlet 7 to be discharged.

Referring to fig. 1, after wastewater enters a first air flotation module, demulsifier and coagulant are fed into an air flotation area through a 12 dosing tank and a pipe system, compressed air is fed into an air compressor and a pipe system 11, the wastewater is dissolved, then the wastewater enters an air flotation area 13 through a dissolved air releaser to fully react, oil substances and floating slag float on the surface of the air flotation area and are scraped by a slag scraping area 14, and discharged water enters a clear water area 15 and is discharged.

Referring to fig. 1, 2, the water discharged from the water outlet of the air floatation module firstly enters a 21 reaction zone of a second advanced oxidation and super-magnetic separation module, an oxidant and activator dosing tank is positioned in a 22 dosing zone and a 23 magnetic powder dosing device of a container, and COD and cyanides in the wastewater are removed in the advanced oxidation reaction zone through oxidation; and the effluent of the reaction zone enters a 26 flocculation zone of container integrated equipment, after full flocculation reaction, the effluent enters a 24-supermagnetic separation main machine for solid-liquid separation, and the residual magnetic powder is recovered by a 25-magnetic powder recovery machine.

Referring to fig. 1, the water from the water outlet of the 4-stage supermagnetic separation container enters a 31-stage high-temperature reaction tank of a third deamination module, a pH adjusting and dosing device of the high-temperature reaction tank is still arranged in a 22-stage dosing area, the pH of the solution is adjusted to 10-12, a steam pipe enters a tank body through the top to be released, ammonia nitrogen is removed by accelerating gas-liquid contact, and the ammonia nitrogen is absorbed by a collecting pipe in a gaseous form.

Referring to fig. 1, 5, the water discharged from the water outlet of the high-temperature reaction tank enters a No. four filtering module, firstly enters a cooling neutralization tank 41, meanwhile, the pH of the solution is adjusted to be neutral by a pH adjusting agent in a dosing region 22, then enters a shallow sand filter 42, and is discharged out of the system after being filtered.

Referring to fig. 1, the sludge produced by the air flotation module and the sludge produced by the advanced oxidation and super-magnetic separation module are collected by a sludge pipeline and then are collected together to a sludge outlet 7 to be discharged.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated treatment equipment for treating coal chemical industry/coking wastewater is characterized in that: the device comprises a first air floatation module, a second advanced oxidation/super-magnetic separation module, a third deamination module, a fourth filtration module and a fifth control module which are skid-mounted in a container; the first, second, third and fourth modules are connected through pipelines, and all control facilities are arranged in the fifth control module.

2. The integrated processing device according to claim 1, wherein: the first air flotation module comprises an 11 air compressor and a piping system, a 12 dosing tank and a piping system, an air flotation area, a slag scraping area and a clear water area, and is skid-mounted in the container; the 11 air compressor and the piping system are connected with the 12 dosing tank and the piping system through the pipeline and the air flotation area.

3. The integrated processing device according to claim 1, wherein: the advanced oxidation reactor of the second advanced oxidation super-magnetic separation module is a 21 reactor with an independent stirring device, a 22 dosing area is arranged in the container and comprises an oxidant, a flocculating agent, an acid agent and an alkaline agent, a 23 magnetic powder adding machine and the oxidant are connected with the 21 reactor through a pipeline, a 3 advanced oxidation reactor water outlet is connected with a 26 flocculation reaction tank through a pipeline and then connected with a 24 super-magnetic separation host, and the solid-liquid separation is discharged from a 4 super-magnetic separation container water outlet.

4. The integrated processing device according to claim 1, wherein: the third deamination module comprises a 31 ammonia nitrogen removal reaction area, a 32 ammonia gas collecting pipe and a 33 steam heating or electric heater; the alkaline agent dosing tank in the dosing region 22 is connected with the ammonia nitrogen removal reaction region 31 through a pipeline, steam or gas enters the reaction region through a stirrer at the upper part of the reaction region, and ammonia gas escapes and is discharged from an ammonia gas collecting pipe 32.

5. The integrated processing device according to claim 1, wherein: the fourth filtering module is characterized in that water outlet of a water outlet of the 5 high-temperature reaction tank is connected into a 41 cooling neutralization tank by adopting a pipeline, and a pH regulator in the 22 dosing area is added into the 41 cooling neutralization tank by adopting a pipeline; and (41) cooling the discharged water of the neutralization pond, connecting the discharged water to a 42 shallow sand filter and then discharging the water.

6. The advanced oxidation supermagnetic separation module of claim 1, wherein: the advanced oxidation mode adopts a Fenton method or a persulfate oxidation method, and a fifth control module comprises an online flow measuring instrument, an online COD measuring instrument and an online ammonia nitrogen measuring instrument, and the dosage is determined by measuring COD, ammonia nitrogen and flow; all the devices are controlled by a PLC, and the control cabinet is arranged in the container of the control module.

7. The integrated processing device of claim 3, wherein: the advanced oxidation technology adopts a Fenton method or a persulfate oxidation method, the oxidant is hydrogen peroxide or peroxydisulfate, and the activator is Fe/Fe₃O₄One or a mixture of several kinds of FeO, the particle size is between 10 and 200 microns, and the reaction time is 1-3 h.

8. The integrated processing device of claim 3, wherein: the super-magnetic separation host machine adopts a separation device with neodymium iron boron magnet as the core material of the separator.

9. The integrated processing device of claim 4, wherein: the pH value of the solution after the ammonia nitrogen reaction zone is adjusted by adding drugs is between 10.0 and 12.0, the temperature is between 55 and 85 ℃, and a heat insulation layer is additionally arranged outside the reaction zone.