CN212403872U

CN212403872U - Complete treatment device for municipal sewage recycling

Info

Publication number: CN212403872U
Application number: CN202020979061.8U
Authority: CN
Inventors: 陈尚武; 徐继峥; 党昕
Original assignee: TONGFANG ENVIRONMENT CO Ltd
Current assignee: TONGFANG ENVIRONMENT CO Ltd
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2021-01-26
Anticipated expiration: 2030-06-02

Abstract

Municipal administration sewage regeneration's complete sets processing apparatus relates to municipal administration sewage advanced treatment field. The complete set of treatment device of the utility model comprises a biological aerated filter, a mechanical accelerated clarification tank and a V-shaped filter which are connected in sequence. The biological aerated filter comprises a biological ceramsite filter material, an aeration system, a back washing system and a water and gas distribution system. The V-shaped filter comprises a quartz sand filter material, a filter plate, a filter head, a water distribution system and a filter material. The core equipment of the mechanical accelerated clarification tank is stirring and mud scraping integrated equipment, the stirring machine and the mud scraping machine use the same motor placed on water, and a PLC (programmable logic controller) system in the mechanical accelerated clarification tank respectively controls the dosing amount and whether the dosing amount is equal to or not. Compared with the prior art, the utility model discloses possess the function of getting rid of COD, BOD, TN, TP, removing hard, removing alkali and suspended solid, can guarantee out the stability and the excellence of water quality of water, solved the technical problem that industrial water quality of water exceeds standard.

Description

Complete treatment device for municipal sewage recycling

Technical Field

The utility model relates to a municipal administration sewage advanced treatment field is applicable to municipal administration sewage and goes out water from one-level A emission standard, is used for the moisturizing of thermal power plant circulative cooling system after handling, satisfies circulative cooling water matter standard in "city and town sewage regeneration engineering design standard" (GB 50335-2016).

Background

Aiming at the water-deficient city, the reclaimed water recycling is realized while the existing water resource is protected, and the method has great significance for the sustainable development of the city. Compared with a surface water source, the urban sewage is used as a potential water source, and the water quantity is stable and is available nearby. Therefore, the deeply treated sewage is an important water source in the future of the city. According to the principle of good water and good use, the sewage recycling should be considered to be reused in industry preferentially. For example, the power plant is a large consumer using water, has high requirements on water quality, especially hardness, can effectively remove COD, BOD, hardness, alkalinity and other key indexes, ensures that the water quality reaches the water quality standard of circulating cooling water in the urban sewage recycling engineering design specification (GB 50335-2016), ensures the water safety, and is an important outlet for recycling the urban sewage.

The quality of the effluent of the sewage treatment plant meets the primary A discharge standard of the national discharge Standard of pollutants for municipal wastewater treatment plant (GB 18918-2002), so the design effluent quality standard of the reclaimed water is the primary A standard, as shown in Table 1.

Index (I)

BOD₅

COD_cr

SS

NH₃－N

TN

TP

pH

Effluent standard (mg/L)

10

50

10

5（8）

15

0.5

6～9

TABLE 1

The reclaimed water outlet is mainly used for replenishing water of a circulating cooling system of a thermal power plant, and meets the circulating cooling water quality standard in the engineering design Specification for recycling urban sewage (GB 50335-2016) according to the water quality requirement of the circulating cooling water of the thermal power plant. The specific effluent quality is shown in table 2:

designed effluent quality

Reference numerals	Item	Quality of effluent water	Detection method
				1	CODcr	≤40 mg/l	Potassium dichromate method or spectrophotometry
2	BOD₅	≤5 mg/l	Standard method of dilution
				3	Ammonia nitrogen	Less than or equal to 3 to 5 mg/l (summer 3, winter 5)	Nahl colorimetric method
4	Total number of bacteria	Less than or equal to 1000 pieces/ml	Plate counting method
				5	Suspended matter SS	≤10 mg/l	Gravimetric method
6	Free residual chlorine	0.1-0.2 mg/l of pipe network tail end	Spectrophotometric method
				7	Total phosphorus (in terms of P)	≤1 mg/l	Ammonium molybdate spectrophotometry
8	Dissolved solid TDS	≤1000 mg/l	Gravimetric method
				9	PH	7.0～8.5	Colorimetric method
10	Full basicity MA	1.0～3.0 mmol/l	Indicator method
				11	Hardness YD	≤6.0 mmol/l（600mg/l）	Complex titration method
12	CL^-	≤250mg/l	Spectrophotometric method
				13	Silicic acid (SiO)₂）	≤30 mg/l	Molybdenum blue method
14	Turbidity (NTU)	≤5	Photometry
				15	All iron	≤0.3 mg/l	Spectrophotometric method

TABLE 2

The center of the prior art is a combined treatment process of a common aeration biological filter and a V-shaped filter for municipal sewage reuse, the treatment can generally meet the water quality requirement of urban reuse water, but the treatment process has problems on water with higher hardness and alkalinity, such as power plant circulating water, and the scaling problem of equipment such as a boiler can be caused by the over-standard hardness.

Disclosure of Invention

To the deficiency that exists among the above-mentioned prior art, the utility model aims at providing a complete set processing apparatus of municipal administration sewage regeneration. The device has the functions of removing COD, BOD, TN and TP, removing hardness, removing alkali and suspended matters, can ensure the stability and excellence of the effluent quality, and solves the technical problem that the quality of industrial water exceeds the standard.

In order to achieve the above object, the technical solution of the present invention is implemented as follows:

a complete set of treatment device for recycling municipal sewage comprises a biological aerated filter and a V-shaped filter. The aeration biological filter comprises a biological filter material, an aeration system, a back washing system and a water and gas distribution system. The V-shaped filter comprises a quartz sand filter material, a filter plate, a filter head, a water distribution system and a filter material. The structure is characterized by also comprising a mechanical accelerated clarification tank connected between the biological aerated filter and the V-shaped filter. The core equipment of the mechanical accelerated clarification tank is stirring and mud scraping integrated equipment, the stirrer and the mud scraper use the same motor placed on water, a PLC (programmable logic controller) system in the mechanical accelerated clarification tank respectively controls the dosing amount and whether dosing is carried out on a plurality of dosing points, and the mechanical accelerated clarification tank further comprises a water inlet system, a mud discharging system and other auxiliary equipment.

The utility model discloses owing to adopted above-mentioned structure, whole set of device comprises three technology section, increases machinery on current municipal sewage retrieval and utilization technical basis and accelerates the depositing reservoir, fine solution because of hardness exceeds standard and make the problem of equipment scale deposit such as boiler, make quality of water more excellent, be favorable to cyclic utilization.

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Drawings

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

FIG. 2 is a schematic structural view of a biological aerated filter according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a mechanical accelerated clarifier according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a V-shaped filter in the embodiment of the present invention.

Detailed Description

Referring to fig. 1 to 4, the municipal sewage recycling complete treatment device of the present invention comprises a biological aerated filter, a mechanical accelerated clarification tank, a V-shaped filter and the like connected in series through pipes.

The aeration biological filter comprises a biological filter material, an aeration system, a back washing system and a water and gas distribution system.

The biological filter tank adopts a combined filter material of activated carbon and biological ceramic materials, more biomass and biological species are borne by the adsorption capacity of the activated carbon and are converted into the biological carbon, the optimal proportion value of the two filter materials is determined through a plurality of similar water quality pilot experiments, the most appropriate biological population of similar projects is met, and pollutants such as COD, BOD, nitrogen, phosphorus and the like are removed to the maximum extent by utilizing the minimum tank capacity.

The core equipment of the mechanical accelerated clarification tank is stirring and mud scraping integrated equipment, and in addition, a water inlet system, a mud discharging system and other auxiliary equipment are also arranged. And adding a flocculating agent to effectively remove the hardness, alkalinity and organic pollutants in water.

Stirring and scraping integrated equipment is that we improve gradually in the engineering reality and come, and the mud scraper motor of former equipment is under water, and the operation is maintained inconveniently, and the flocculation stirring machine sets up a motor in addition alone, and the design is complicated, and the fault point is many. After the optimization, stirring and mud scraping are synchronously completed, the torque of equipment is reasonably designed, complete unification is achieved, and the effect is good after repeated trial. In the using process, the control of a dosing system and the matched optimization of flocculation stirring equipment are carried out, multi-point dosing is adopted in design, the whole system is controlled through a PLC system, the flocculation reaction condition is fed back in time at different dosing points, the dosing amount and the dosing quantity of the next dosing point are controlled according to the reaction condition, the dosing points can be used by the system to be more than three points, and the medicament cost is saved by at least more than 30% through the system design optimization.

The V-shaped filter tank comprises a quartz sand filter material, a filter plate, a filter head, a water distribution system, a filter material and the like, and can effectively intercept suspended matters in sewage

The utility model discloses the device during operation:

the aeration biological filter adopts ceramic and active carbon filler, microbial films grow on the surface and the space of an opening inner cavity, when sewage flows through a filter material layer from bottom to top, the microbial films absorb organic pollutants in the sewage as nutrient substances for metabolism of the sewage, and under the condition of providing aeration oxygen supply at the lower part of the filter material layer, gas and water are in an upward flow state, so that organic matters in the wastewater are subjected to aerobic degradation and nitrification denitrification. The aeration biological filter tank regularly utilizes the treated effluent to carry out back flush on the filter tank, and removes aged microbial membranes proliferated on the surface of the filter material so as to ensure the activity of the microbial membranes. The principle of sewage treatment in the biological aerated filter is that microorganisms in a biological membrane attached to a filter material in a reactor are subjected to oxidative decomposition, the adsorption and retention of the filter material and the microbial membrane, the food chain graded predation formed along the water flow direction and the denitrification of a microenvironment in the microbial membrane.

The effluent of the aeration biological filter enters a mechanical accelerated clarification tank. After entering the annular triangular water distribution tank through the water inlet pipe, the water enters the first reaction chamber through the water distribution hole at the bottom of the tank, and is mixed with the return sludge in the separation chamber, and the mixing and reaction process of the medicament and the water is completed. The mixed water with the sludge is lifted to the second reaction chamber by the impeller on the stirring device, and the contact flocculation is completed in the first reaction chamber and the second reaction chamber. The second reaction chamber is internally provided with a guide plate to eliminate the water flow rotation caused by the lifting action of the impeller, so that the water flow stably flows into the separation chamber through the guide chamber, and the guide chamber is also provided with the guide plate. Where the water and agent complete the coagulation process and rectify the flow. The upper part of the separation chamber is a clean water area, and clean water flows upwards into the water collecting tank and the water outlet pipe. The lower part of the separation chamber is a suspended sludge layer, most of settled sludge flows into the first reaction chamber again along the backflow seam of the conical bottom to be in contact flocculation reaction with raw water again, and a small part of settled sludge is discharged into a sludge concentrator and is discharged out of the tank after being concentrated to a certain concentration, so that the water consumption is reduced. The annular triangular water distribution tank is provided with a drain pipe to remove air brought by inlet water.

The effluent of the mechanical accelerated clarification tank flows into a V-shaped filter tank by gravity after being subjected to dosing and coagulating sedimentation and is filtered to meet the requirement of recycling water quality.

Claims

1. Municipal administration sewage regeneration's complete sets processing apparatus, it includes bological aerated filter and V type filtering pond, the bological aerated filter includes biological filter material, aeration systems, back flush system and water distribution, gas distribution system, the V type filtering pond includes quartz sand filter material, filter plate, filter head, water distribution system and filter material, its characterized in that, it still including connecting the machinery between bological aerated filter and V type filtering pond and accelerateing the depositing reservoir, the core equipment of machinery accelerateing the depositing reservoir is stirring and scrapes mud integral type equipment, and the motor on water is arranged in to the same platform of mixer and mud scraper use, and the PLC system in machinery accelerateing the depositing reservoir controls the dose of throwing of a plurality of dosing points respectively and whether to give medicine, machinery is accelerateed the depositing reservoir still including water inlet system and mud discharge system.