CN217377619U

CN217377619U - Shaft type sewage treatment equipment

Info

Publication number: CN217377619U
Application number: CN202121449448.3U
Authority: CN
Inventors: 柏昕然; 陈凡阵; 李�诚; 曹仲宏; 胡光振; 方正; 顾悦; 郭金玲; 刘旭; 马正占
Original assignee: Tianjin Huabo Water Co ltd
Current assignee: Tianjin Huabo Water Co ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-09-06
Anticipated expiration: 2031-06-28

Abstract

The utility model relates to a shaft formula sewage treatment device, equipment body including the shaft shape, the equipment body includes shaft reaction tank and sedimentation tank, shaft reaction tank and sedimentation tank separate through intermediate bottom, shaft reaction tank and advance water piping connection, wherein, shaft reaction tank top-down divide into four regions, include biofilm carrier district, reaction zone, mud entrapment district and heavy mud district respectively, the degree of depth of shaft reaction tank between 5-10 meters and the equipment body sets up in the soil. The vertical shaft type vertical sewage treatment device adopts a vertical shaft form, can reach 10m or higher in the vertical direction, is located underground, can effectively utilize the ground temperature as a heat source for improving the sewage temperature, and can improve the winter rural sewage temperature in the northern area under the condition of not increasing the cost.

Description

Shaft type sewage treatment equipment

Technical Field

The utility model belongs to rural sewage treatment field, concretely relates to shaft type sewage treatment device.

Background

The rural sewage treatment technology has obvious characteristics, the difference of each region is large, the problem that the rural sewage temperature is low in winter in northern areas of China and is difficult to biochemically treat becomes a puzzle, the puzzle is a main reason that the standard reaching rate of rural sewage treatment is low, the temperature rise cost is very high by means of steam, electricity and the like, potential safety hazards exist, and the realization is difficult. The research on the technology for effectively improving the sewage treatment efficiency in winter becomes a key link for solving the problem of sewage treatment in rural areas in northern areas of China.

SUMMERY OF THE UTILITY MODEL

For solving the problem that exists among the prior art, the utility model provides a shaft sewage treatment device, the equipment body including the shaft shape, the equipment body includes shaft reaction tank and sedimentation tank, shaft reaction tank and sedimentation tank separate through intermediate bottom, shaft reaction tank and advance water piping connection, wherein, shaft reaction tank top-down divide into four regions, includes biofilm carrier district, reaction zone, mud entrapment district and heavy mud district respectively, the degree of depth of shaft reaction tank between 5-10 meters and the equipment body sets up in the soil.

Preferably, the water inlet of the water inlet pipe extends into the position of the reaction zone.

Preferably, a sludge discharge pipe is arranged in the vertical shaft reaction tank, a sludge discharge suction port of the sludge discharge pipe is arranged in the sludge settling area, and a sludge discharge vent pipe is arranged at the upper end of the sludge discharge pipe.

In any of the above embodiments, preferably, the biological filler region is provided with biological filler.

In any of the above schemes, preferably, an aeration pipe is arranged in the vertical shaft reaction tank, and a perforated aeration pipe of the aeration pipe is positioned below the biological filler.

In any of the above aspects, it is preferable that a connection port is provided in the intermediate partition.

In any of the above embodiments, preferably, an inclined plate packing is provided in the sedimentation tank.

In any of the above schemes, preferably, a perforated water collecting device is arranged in the sedimentation tank, and the perforated water collecting device is connected with the water outlet pipe.

The technical characteristics are as follows: the reaction tank is designed in a shaft mode and is located underground, the ground temperature below a freezing line can be gradually increased to 5-10 m below the ground, the temperature is basically 12-17 ℃ under normal conditions, the temperature of the sewage can reach more than 10 ℃ under the action of the ground temperature and hydraulic circulation in winter, and the actual ground temperature controls the temperature of the sewage within a small fluctuation range; the vertical arrangement greatly saves the occupied land; the middle part is provided with a flow guide clapboard, the single side aeration of the middle upper part leads the water body to form circulation in the reaction tank, different circulation ratios can be formed according to the aeration intensity, and no mechanical facilities are arranged in the system; different reaction zones can be naturally formed in the reaction tank by local aeration; the braid biological filler is arranged in the aeration zone to improve the biomass; the sludge liquid in the reaction tank can form a concentration gradient in the vertical direction, and an interception layer is formed by utilizing activated sludge with higher specific gravity at the lower part to intercept large granular substances in the raw water; the bottom of the reaction zone is a sludge settling tank, and the settled sludge can automatically flow into the system without independent reflux power.

The utility model also provides a rural sewage treatment process of shaft formula, contain aeration oxygenation have air stripping hydraulic circulation technique, biological treatment technique, sediment mud unpowered backward flow technique, winter ground temperature heating sewage technique, sludge blanket hold back technique, perforation water-collecting device technique concurrently. The aeration oxygenation technology utilizes a blower to aerate the system, and forms an aerobic zone in an aeration zone; the technology with the gas stripping hydraulic circulation is characterized in that compressed air is introduced into a constrained water body, and when the air is released, the density difference of the water body is reduced, so that the water body flows upwards, hydraulic circulation is formed in a system, and various reaction zones are formed in a vertical shaft area; according to the biological treatment technology, water flow is oxygenated in the air stripping process, the dissolved oxygen is relatively high, the water flow passes through the area provided with the biological filler and is adsorbed and exchanged with a biological film on the filler, and the biological film degrades adsorbed pollutants, so that the purpose of removing the pollutants in water is achieved; the unpowered backflow technology for the precipitated sludge utilizes an inclined plane with the bottom of the precipitation tank being not less than 60 degrees to slide the precipitated sludge to an opening between the bottom of the precipitation tank and the reaction tank, and then the precipitated sludge enters the reaction system again; according to the technology for heating sewage by using the ground temperature, the tank body part of a reaction tank (which can be an adjusting tank) is positioned underground, the depth can reach 10m, the underground temperature increases along with the increase of the depth, the temperature in the depth of 5-10 m underground in the northern area reaches 12-17 ℃, heat is transferred through a tank body when a water body in the reaction tank circulates, the temperature of the sewage is gradually increased by the ground temperature and can reach more than 10 ℃, the temperature of the sewage can be reduced in other seasons, and the temperature can be kept in a smaller fluctuation range throughout the year; according to the sludge retention technology, due to gravity, particles with large specific gravity can form certain accumulation at the bottom of the reaction tank, so that a sludge layer is formed, and large particle suspended matters and the like in raw water can be retained; the perforation water collecting device is a collecting device which is independently researched and developed by my department and is composed of perforated pipes, and has the functions of isolating scum and improving the difficulty of precipitating and collecting water.

In the above technology, it is preferable that the biological treatment area is provided with a braid-type fixed biological filler, and inoculated sludge can be used to accelerate filler biofilm formation to form a suitable biological flora.

In the technology, the shaft type depth is preferably within the range of 5-10 m underground, so that a stable geothermal source can be provided, and the water temperature required by treatment can be reached.

In the above technology, it is preferable that the reaction tank should have sufficient heat transfer circulation time so that the temperature of the sewage in the sewage system can reach the design requirement under normal treatment conditions.

In the technology, the preferred is that the gas stripping hydraulic circulation adopts conventional wind pressure to enable the water body to form circulation and oxygenation, and forms DO concentration gradient in the reactor, thereby forming different reaction areas and saving energy consumption.

In the above technology, it is preferable that the precipitated sludge is unpowered to return, and the precipitated sludge can be returned to the reaction system by gravity, which is suitable for small-scale sewage treatment;

the preferential is in the technique, the technique is held back to mud, because gravity reason, the great granule of proportion can form certain accumulation in reaction tank bottom, and then forms the sludge blanket, can hold back great granule suspended solid etc. in the raw water, and then takes place hydrolysis acidification reaction, promotes the biodegradability.

In the technology, the reactor can be preferably combined in parallel and series, and the connecting pipe is arranged at the upper part of the reaction tank, so that a multi-stage AO process can be formed to meet the requirements of different treatment scales.

The utility model aims at providing an utilize natural condition to promote rural sewage treatment technique of shaft formula of sewage temperature, its shaft form through adopting can reach 10m or higher in the vertical, all is located the underground, can effectively utilize the earth temperature as the heat source that promotes sewage temperature, can promote rural sewage temperature in winter of northern area under the condition that does not increase cost (other areas are equally effective).

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the prior art can not increase the temperature of rural sewage in winter with low cost;

(2) the shaft type design technology can greatly save the floor area of treatment facilities;

(3) the shaft reactor can be manufactured in a segmented mode in the depth direction and connected through flanges on site, and therefore the problems of equipment transportation and equipment installation can be well solved;

(4) the shaft reactor can adopt a parallel/serial combination mode to meet the requirements of different treatment scales.

Drawings

FIG. 1 is a schematic view of a preferred embodiment of a shaft-type sewage treatment apparatus according to the present invention;

the figures are labeled as follows: 1, water inlet pipe; 2, a mud discharge breather pipe; 3, biological stuffing; 4, a sludge discharge pipe; 5, a water inlet; 6, discharging mud and sucking; 7, an aeration pipe; 8, a perforated water collecting device; 9, discharging a water pipe; 10, filling with an inclined plate; 11 perforating an aeration pipe; 12 a connecting port; 13 connecting flanges up and down; 14, a middle clapboard; 15 a sludge entrapment zone; 16 a mud settling area; 17 shaft reaction tank; 18 a sedimentation tank.

Detailed Description

In order to further understand the present invention, the present invention will be described in detail with reference to the following embodiments.

As shown in fig. 1, the utility model provides a shaft type sewage treatment device, which comprises a shaft-shaped device body, wherein the device body comprises a shaft reaction tank 17 and a sedimentation tank 18, the shaft reaction tank 17 and the sedimentation tank 18 are separated by an intermediate baffle 14, the shaft reaction tank 17 is connected with a water inlet pipe 1, wherein the shaft reaction tank 17 is divided into four regions from top to bottom, and respectively comprises a biological filler region, a reaction region, a sludge interception region and a sludge deposition region 16, the depth of the shaft reaction tank 17 is between 5 and 10 meters, the device body is arranged in the ground, a water inlet 5 of the water inlet pipe 1 extends into the reaction region, a sludge discharge pipe 4 is arranged in the shaft reaction tank 17, a sludge discharge inlet 6 of the sludge discharge pipe 4 is arranged in the sludge deposition region 16, a sludge discharge vent pipe 2 is arranged at the upper end of the sludge discharge pipe 4, the biological filler zone is provided with biological fillers 3, the vertical shaft reaction tank 17 is internally provided with an aerator pipe 7, a perforated aerator pipe 11 of the aerator pipe 7 is positioned below the biological fillers, the middle partition plate 14 is provided with a connecting port 12, the upper part and the lower part of the vertical shaft reaction tank 17 are connected through an upper connecting flange and a lower connecting flange 13, the sedimentation tank 18 is internally provided with inclined plate fillers 10, the sedimentation tank 18 is internally provided with a perforated water collecting device 8, and the perforated water collecting device 8 is connected with a water outlet pipe 9.

When the device is used, raw water enters a reactor through a water inlet pipe 01, compressed air (air pressure of 3.5-5 m) provided by a conventional fan is utilized and is conveyed to a perforated aeration pipe 11 through a pipeline 07, released air passes through an oxygen source for a system on one hand, on the other hand, water can form hydraulic circulation in a reaction tank 17 by means of an intermediate partition plate 14, meanwhile, as a tank body is positioned underground and the depth reaches 10m, heat exchange is carried out between water in the reaction tank 17 and surrounding soil, the temperature of sewage is increased and can reach more than 10 ℃ (related to water temperature, ground temperature and reaction time), a filler area is arranged above the perforated aeration pipe, biological filler 03 is installed, and as the aeration oxygenation area is an aerobic area, the aeration oxygenation area is gradually reduced along with circulation DO and is transited to an anoxic area; due to hydraulic circulation and gravity, a sludge retaining layer is formed in the sludge retaining area 15 at the bottom of the reaction tank 17, so that large-particle suspended matters can be retained, and a certain hydrolysis effect can be generated in the area; mud water in the reaction tank 17 enters the sedimentation tank 18 from the reaction tank/sedimentation tank connecting port 12, mud water separation is carried out through the inclined plate packing 10, supernatant is discharged out of the system through the water outlet pipe 09 after being collected by the perforated water collecting device 08, and settled mud slides into the reaction tank 17 again through the inclined plate at the lower part of the sedimentation tank 18; the residual sludge is stored in a sludge area 16 at the lower part of the reaction tank 17 and is discharged outside after being lifted by a pump through a sludge discharge pipe 04 or discharged by an external pump.

Test example 1

Based on the working principle, the small test study is carried out, the internal water temperature is controlled to be 15 ℃ by using a 0.8m multiplied by 1.2m water tank, 2 long DN150 transparent plastic pipelines are used for being communicated up and down, the pipelines are vertically arranged, namely the pipelines of about 1/2 are immersed in water, the leaking parts are located in the atmosphere, and the small test is carried out at the indoor natural temperature in winter. The small aeration facility is arranged in the single-side tank body, the raw water is refrigerated by a refrigerator and is about 4 ℃, and experiments prove that the temperature of the water body in the reactor can be raised to 10-12 ℃ by hydraulic circulation under the condition of continuous water inlet.

Tests prove that under the condition of controlling reasonable flow, the temperature of the water body in the reactor can be raised to be slightly lower or approach to the corresponding ambient temperature by using proper constant external ambient temperature.

Test example II

Based on the working principle, the technical application research is carried out, a reaction tank with the thickness of 0.8m multiplied by 8.5m is utilized to carry out a simulation production test, and the test treatment capacity is 5-12 m ³ And d, starting the test for 10 months, culturing a test biochemical system by using activated sludge of a sewage treatment plant, and formally starting the test in 12 months. The test water inlet temperature is 1-5 ℃ (filtered raw water enters the test system after being stored outdoors), water in a biochemical reaction tank of a sewage plant (the water temperature is 12-15 ℃ in winter) is used as a heat supply source, the immersion depth of the tank body is 5m, the depth above the water surface is 3.5m (heat preservation treatment is carried out outside the reaction tank and the sedimentation tank above the water surface), the power N of a matched fan is 0.75kW, and the air-water ratio is 8-30: 1 and can be adjusted.

After the system operation parameters are adjusted, the temperature of the sewage in the reaction tank can reach 10-12 ℃, and COD and NH of the effluent of the test system ₃ The indexes of-N, TN all achieve good treatment effect.

It will be understood by those skilled in the art that a shaft sewage treatment plant of the present invention includes any combination of the above-described embodiments and embodiments of the present invention and the portions shown in the drawings, which is limited to space and has no description of the combination of these embodiments for the sake of brevity. 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. The utility model provides a shaft formula sewage treatment device, includes the equipment body of shaft shape, the equipment body includes shaft reaction tank and sedimentation tank, shaft reaction tank and sedimentation tank separate through intermediate bottom, shaft reaction tank and advance water piping connection, its characterized in that, shaft reaction tank top-down divide into four regions, includes biological filler district, reaction zone, mud entrapment district and heavy mud district respectively, the degree of depth of shaft reaction tank between 5-10 meters and the equipment body sets up in the soil.

2. The vertical shaft type sewage treatment apparatus according to claim 1, wherein the inlet of said inlet pipe is extended to a position of said reaction zone.

3. The shaft-type sewage treatment equipment according to claim 1, wherein a sludge discharge pipe is arranged in the shaft reaction tank, a sludge discharge suction port of the sludge discharge pipe is arranged in the sludge deposition area, and a sludge discharge vent pipe is arranged at the upper end of the sludge discharge pipe.

4. The shaft sewage treatment plant of claim 1 wherein the bio-packing region is provided with bio-packing.

5. The shaft-type sewage treatment apparatus according to claim 4, wherein an aeration pipe is provided in the shaft-type reaction tank, and a perforated aeration pipe of the aeration pipe is located below the biological filler.

6. The vertical shaft type sewage treatment apparatus according to claim 1, wherein a connection port is provided on the intermediate partition.

7. The vertical shaft type sewage treatment apparatus according to claim 1, wherein an inclined plate packing is provided in the settling tank.

8. The vertical shaft type sewage treatment equipment according to claim 1, wherein a perforated water collecting device is arranged in the sedimentation tank, and the perforated water collecting device is connected with a water outlet pipe.