阅读说明：本技术 一种市政污水再生利用的成套处理装置 (Complete treatment device for municipal sewage recycling ) 是由 陈尚武 徐继峥 党昕 于 2020-06-02 设计创作，主要内容包括：一种市政污水再生利用的成套处理装置,涉及市政污水深度处理领域。本发明成套处理装置包括依次连接的曝气生物滤池、机械加速澄清池和V型滤池。所述曝气生物滤池包括生物陶粒滤料、曝气系统、反冲洗系统和配水、配气系统。所述V型滤池包括石英砂滤料、滤板、滤头、布水系统及滤料。所述机械加速澄清池的核心设备是搅拌刮泥一体式设备,搅拌机和刮泥机使用同一台置于水上的电机,机械加速澄清池中的PLC系统分别控制多个加药点的投药量与是否投药。同现有技术相比,本发明具备去除COD、BOD、TN、TP、除硬、除碱和悬浮物的功能,能保证出水水质的稳定及优异,解决了工业用水水质超标的技术难题。(A complete set of treatment device for recycling municipal sewage relates to the field of advanced treatment of municipal sewage. The complete treatment device 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 invention 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 of the over standard of the water quality of industrial water.)

1. The utility model provides a municipal administration sewage regeneration's complete sets processing apparatus, it includes bological aerated filter and V type filtering pond, 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 the machinery that connects between bological aerated filter and V type filtering pond and accelerate the depositing reservoir, the core equipment of machinery is stirring and scrapes mud integral type equipment, and the mixer uses same platform to arrange the motor on water in with scraping mud machine, and the PLC system in the machinery accelerates the depositing reservoir controls the dose of throwing of a plurality of dosing points respectively and whether to dose, machinery is clarification reservoir still including water inlet system, row mud system and other auxiliary assembly with higher speed.

Technical Field

The invention relates to the field of advanced treatment of municipal sewage, which is suitable for discharging the municipal sewage from a first-level A discharge standard, is used for replenishing water of a circulating cooling system of a thermal power plant after treatment, and meets the quality standard of circulating cooling water in the engineering design Specification for recycling municipal sewage (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

CODcr

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

Aiming at the defects in the prior art, the invention aims to provide a complete set of treatment device for recycling municipal sewage. 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 treatment device for municipal sewage recycling 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.

By adopting the structure, the whole device consists of three process sections, and the mechanical accelerated clarification tank is added on the basis of the existing municipal sewage recycling technology, so that the problem of scaling of equipment such as a boiler and the like due to over standard hardness is well solved, the water quality is better, and the cyclic utilization is facilitated.

The invention is further described with reference to the following figures and 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 illustration of the construction of a mechanically accelerated clarifier in an embodiment of the present invention;

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

Detailed Description

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

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

When the device works:

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.