CN114772785A - An integrated sewage treatment device and method - Google Patents

Abstract

The invention provides an integrated sewage treatment device, which includes a dilution stirring tank, a flocculation stirring tank, a sedimentation tank and a sludge treatment room which are connected in sequence; it also includes a dosing room connected with the flocculation stirring tank; the chemical dosing room includes A carbon dioxide neutralization system and a flocculant addition system; the flocculation stirring tank is provided with a steam-water mixer for communication with the carbon dioxide neutralization system; the flocculation stirring tank is also provided with a tubular mixer for communication with the flocculant addition system device. The invention also provides a sewage treatment method, which includes the steps of sewage dilution, flocculation and stirring, neutralization of alkaline sewage, precipitation and sludge dewatering. In the stirring tank, the neutralization of alkaline sewage will not cause excessive neutralization, and no harmful substances will be introduced, and no additional oxidation treatment steps will be added, making the sewage treatment process more economical and environmentally friendly.

Description

An integrated sewage treatment device and method

technical field

The invention relates to the technical field of sewage treatment, in particular to an integrated sewage treatment device and method.

Background technique

During the production process of the concrete mixing plant, a large amount of mud water will be generated during the cleaning of cement tankers, mixing main engines and other equipment. The mud water contains a large amount of sand aggregate, stone aggregate, fine sand, mortar and a large amount of admixtures. If it is directly discharged, it will not only cause serious damage to the surrounding environment, but also waste a lot of sand and gravel aggregates and water resources. Therefore, the mud water needs to be treated and reused to improve resource utilization while protecting the environment. .

Existing sewage treatment technologies often use sulfuric acid, hydrochloric acid and other solutions to neutralize sewage, which will introduce harmful substances into sewage, and there will also be excessive neutralization, which is not conducive to environmental protection; when organic acids are used to replace sulfuric acid, When hydrochloric acid and other substances are used for sewage neutralization, the introduced organic substances need to be oxidized later, which increases the difficulty and cost of sewage treatment.

To sum up, there is an urgent need for an integrated sewage treatment device and method to solve the problems existing in the prior art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an integrated sewage treatment device and method to solve the problem of excessive neutralization easily occurring in the existing sewage treatment process.

In order to achieve the above purpose, the present invention provides an integrated sewage treatment device, comprising a dilution stirring tank, a flocculation stirring tank, a sedimentation tank and a sludge treatment room connected in sequence; and a dosing room connected with the flocculation stirring tank;

The dosing room includes a carbon dioxide neutralization system and a flocculant addition system;

The flocculation stirring tank is provided with a steam-water mixer for communication with the carbon dioxide neutralization system; the flocculation stirring tank is also provided with a tubular mixer for communication with the flocculant addition system.

Preferably, the dilution and stirring tank includes a sewage water inlet, an agitator 1, a water replenishing inlet, a water quality detection sensor 1, a water pump 1 and a water pump 2; The first mixer, the first water quality detection sensor, the first water pump and the second water pump are all arranged inside the dilution and stirring tank; the first water pump is used to extract the sewage in the dilution and stirring tank for recycling, and the second The sewage in the dilution stirring tank is sent to the tubular mixer of the flocculation stirring tank.

Preferably, the flocculation stirring tank is provided with a plurality of partitions arranged staggered in the vertical direction, and the plurality of partitions are combined to form at least two stirring chambers, and the adjacent stirring chambers are communicated through an S-shaped channel; each The stirring chamber is provided with a second stirrer; the stirring chamber at the beginning end communicates with the tubular mixer, and the agitating chamber at the end communicates with the sedimentation tank.

Preferably, the sedimentation tank includes an overflow port, a sludge scraper, a sludge detection sensor, an inclined plate assembly and an overflow weir; the bottom of the sedimentation tank and the top of the flocculation stirring tank are connected through an overflow port; the The scraper, the sludge detection sensor, the inclined plate assembly and the overflow weir are sequentially arranged inside the sedimentation tank from bottom to top.

Preferably, the outlet of the overflow weir is provided with a second water quality detection sensor; the bottom of the sedimentation tank is provided with a conical sludge collecting port communicating with the sludge treatment room.

Preferably, the carbon dioxide neutralization system includes a storage tank and a carbon dioxide vaporizer; the carbon dioxide vaporizer is connected between the storage tank and the soda-water mixer.

Preferably, the flocculant addition system includes at least two kinds of chemical storage tanks, each of which is provided with a corresponding pipeline connected to the interior of the tubular mixer or the flocculation stirring tank.

Preferably, the dosing room further comprises an electric control system respectively connected with the carbon dioxide neutralization system and the flocculant addition system.

Preferably, the sludge treatment room includes a feed pump and a filter press; the feed pump is connected between the sedimentation tank and the filter press.

The present invention also provides a sewage treatment method, comprising the following steps:

Step 1: Input the sewage into the dilution stirring tank for stirring and dilution, and conduct water quality testing on the diluted sewage.

Step 2: In the flocculation stirring tank, the PAC solution with a concentration of 5% to 10% is firstly delivered to the tubular mixer of the flocculation stirring tank through the flocculant adding system in the dosing room; The PAM solution with a concentration of 1‰ to 2‰ is transported in the stirring tank; during the flocculation stirring process, carbon dioxide is input into the flocculation stirring tank through the carbon dioxide neutralization system to adjust the pH value of the sewage;

Step 3: The sewage in the flocculation stirring tank is transported to the sedimentation tank, and the water quality test is carried out at the water outlet of the sedimentation tank. When the total solid content in the treated sewage is less than 2000mg/L, the chloride ion content When the ion content is less than 600mg/L and the pH value is 6 to 9, the treated sewage is output to the sedimentation tank for recycling;

Step 4: The sludge in the sedimentation tank is input into the sludge treatment room for treatment and transfer.

Applying the technical scheme of the present invention has the following beneficial effects:

(1) In the present invention, by setting the carbon dioxide neutralization system in the dosing room, the carbon dioxide is passed into the flocculation stirring tank, and the alkaline sewage is neutralized, and the situation of excessive neutralization will not be caused, and harmful substances will not be introduced. , without adding additional oxidation treatment steps, making the sewage treatment process more economical and environmentally friendly.

(2) In the present invention, a tubular mixer is arranged in the flocculation stirring tank to fully mix the flocculant and the sewage in the spiral pipeline inside the tubular mixer, so as to improve the diffusion effect of the flocculant in the sewage. It saves the usage of flocculants and is suitable for the rapid mixing and reaction of PAC solution and sewage.

(3) In the present invention, a water quality detection sensor and a liquid level sensor are provided in the dilution stirring tank, which is convenient for the detection of the diluted sewage. According to the water quality, different water pumps are selected to realize the output of sewage or input the sewage into the flocculation stirring tank. When the diluted sewage can be directly recycled, the subsequent unnecessary sewage treatment steps are avoided and the cost of sewage treatment is reduced.

(4) In the present invention, a plurality of stirring chambers are arranged in the flocculation stirring tank, and each stirring chamber is provided with a second stirrer, which is convenient for the sewage and the flocculant to be fully mixed and flocculated in the flocculation stirring tank, and at the same time, carbon dioxide and flocculation can be realized. The sufficient neutralization of sewage can comprehensively improve the effect of sewage treatment.

(5) In the present invention, the solid-liquid separation can be quickly realized through the inclined plate assembly in the sedimentation tank, the outflow of clean water at the top of the sedimentation tank can be realized through the overflow weir at the top of the sedimentation tank, and the collection of sludge can be realized through the mud scraper at the bottom of the sedimentation tank. .

(6) In the present invention, the flocculant addition system includes at least two chemical storage tanks, and the input sequence and ratio of different flocculants are controlled by the electronic control system to obtain the optimal sewage treatment effect and reduce sewage treatment costs.

(7) In the present invention, the electronic control system is connected with the pump parts, agitators, sensors and pipeline valves in the sewage treatment device, so as to facilitate the intelligent control of the sewage treatment process.

(8) In the present invention, a feeding pump and a filter press are arranged in the sludge treatment room, which facilitates the extraction and dehydration of the sludge in the sedimentation tank, realizes the treatment and transfer of the sludge, and realizes the recovery of the aggregate in the sludge. .

(9) In the present invention, the dilution stirring tank, the flocculation stirring tank, the sedimentation tank, the dosing room and the sludge treatment room are integrated into an integrated box-type sewage treatment device, which has a compact structure and a reasonable equipment layout.

(10) In the present invention, the sewage treatment process is intelligently monitored by each sensor, and the entire sewage treatment process only includes steps such as dilution, neutralization, flocculation, sedimentation and sludge dewatering, and the process is simplified.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail below with reference to the drawings.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a front view of an integrated sewage treatment device in an embodiment of the present application;

2 is a top view of an integrated sewage treatment device in an embodiment of the present application;

Fig. 3 is the A-A sectional view of Fig. 2 of the embodiment of the present application;

Fig. 4 is the B-B sectional view of Fig. 2 of the embodiment of the present application;

Among them, 1. Dilution mixing tank, 1.1, Sewage water inlet, 1.2, Agitator 1, 1.3, Water replenishment inlet, 1.4, Water quality detection sensor 1, 1.5, Water pump 1, 1.6, Water pump 2, 1.7, Geared motor 1, 1.8, Liquid level sensor, 1.9, reuse water outlet, 1.10, water inlet pipeline, 1.11, outer ladder, 1.12, inner ladder, 1.13, inner ladder cover, 2, flocculation stirring tank, 2.1, soda water mixer, 2.2, tubular type Mixer, 2.3, separator, 2.4, agitator 2, 2.5, gear motor 2, 2.6, first stirring chamber, 2.7, second stirring chamber, 2.8, overflow port of flocculation tank, 3, sedimentation tank, 3.1, overflow Flow outlet, 3.2, mud scraper, 3.3, sludge detection sensor, 3.4, inclined plate assembly, 3.5, overflow weir, 3.6, water quality detection sensor 2, 3.7, conical mud collecting port, 3.8, clean water outlet, 3.9 , mud water pipeline, 4, dosing room, 4.1, carbon dioxide neutralization system, 4.1.1, storage tank, 4.1.2, carbon dioxide vaporizer, 4.1.3, carbon dioxide pipeline, 4.2, flocculant addition system, 4.2.1, Reagent storage box, 4.2.2, Reagent A pipeline, 4.2.3, Reagent B pipeline, 4.3, Electronic control system, 4.4, Double door, 4.5, Single door, 5, Sludge treatment room, 5.1, Feed pump , 5.2, filter press, 5.3, feeding pump maintenance room, 5.4, sludge dewatering room, 5.5, movable rain shelter, 5.6, stairs, 5.7, feeding pipeline, 5.8, transfer car, 6, guardrail.

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention may be implemented in many different ways as defined and covered by the claims.

Example:

Referring to FIGS. 1 to 4 , an integrated sewage treatment device and method, this embodiment is applied to sewage treatment of a concrete mixing plant.

An integrated sewage treatment device, referring to Figures 1 and 2, includes a dilution stirring tank 1, a flocculation stirring tank 2, a sedimentation tank 3 and a sludge treatment room 5 that are connected in sequence; it also includes a dosing tank that communicates with the flocculation stirring tank 2. room 4;

The dosing room 4 includes a carbon dioxide neutralization system 4.1 and a flocculant addition system 4.2;

The flocculation stirring tank 2 is provided with a steam-water mixer 2.1 for communicating with the carbon dioxide neutralization system 4.1, which is used to pass carbon dioxide into the flocculation stirring tank 2 to achieve neutralization of alkaline sewage without causing excessive neutralization. and no harmful substances will be introduced, making the sewage treatment process more economical and environmentally friendly; the flocculation stirring tank 2 is also provided with a tubular mixer 2.2 for communicating with the flocculant adding system 4.2, which is used for flocculant and sewage. The spiral pipe inside the tubular mixer 2.2 is fully mixed to improve the diffusion effect of the flocculant in the sewage, which can save the usage of the flocculant.

The dilution and stirring tank 1 includes a sewage water inlet 1.1, a mixer 1.2, a water replenishment inlet 1.3, a water quality detection sensor 1.4, a water pump 1.5 and a water pump 2 1.6; On the side wall of the pool body of the pool 1, the sewage from the concrete mixing station enters the dilution mixing tank 1 through the sewage water inlet 1.1. At this time, the sewage contains a large amount of sand aggregate, stone aggregate, fine sand, mortar and a large amount of admixtures. In line with the direct recycling standard, it needs to be diluted with water through the water replenishment port 1.3; the agitator 1.2, the water quality detection sensor 1.4, the water pump 1.5 and the water pump 2 1.6 are all set inside the dilution mixing tank 1, and the agitator 1.2 and the geared motor 1. 1.7 is connected to dilute the sewage evenly. There is also a liquid level sensor 1.8 in the dilution mixing tank 1. After the sewage is diluted, the diluted sewage is detected by the water quality detection sensor 1.4 and the liquid level sensor 1.8. When the water level is high and the total solid content in the sewage is less than 2000mg/L, the chloride ion content is less than 500mg/L, the sulfate ion content is less than 600mg/L and the pH value is 6 to 9, the sewage can be directly recycled and used for the treatment of sewage. The mixing station equipment is washed, etc; The sewage in the stirring tank 1 is transported to the tubular mixer 2.2 of the flocculation stirring tank 2 through the water inlet pipeline 1.10 for further treatment. An outer ladder 1.11 and an inner ladder 1.12 are respectively provided on the side wall of the dilution and stirring tank 1 to facilitate the staff to enter the dilution and stirring tank 1 for maintenance. The top of the inner ladder 1.12 is also provided with an inner ladder cover connected to the top of the tank body. 1.13.

Referring to Fig. 3, the flocculation stirring tank 2 is provided with a plurality of partitions 2.3 staggered in the vertical direction, and the plurality of partitions 2.3 are combined to form at least two stirring chambers, and S-shaped channels pass between adjacent stirring chambers In this embodiment, the flocculation stirring tank 2 includes a first stirring chamber 2.6 and a second stirring chamber 2.7, the steam-water mixer 2.1 is located at the bottom of the first stirring chamber 2.6 and the second stirring chamber 2.7, and in the first stirring chamber 2.6 The flocculated sewage flows into the second stirring chamber 2.7 through the overflow port 2.8 of the flocculation tank; each stirring chamber is provided with a second stirrer 2.4, and the second stirrer 2.4 is rotated by the gear motor two 2.5, which is used for stirring the sewage. It is fully mixed with carbon dioxide and flocculant; the stirring chamber at the beginning is connected with the tubular mixer 2.2, and the stirring chamber at the end is connected with the sedimentation tank 3. In this embodiment, the first stirring chamber 2.6 is connected with the tubular mixer 2.2. The outlet is communicated, and the second stirring chamber 2.7 is communicated with the sedimentation tank 3 through the overflow port 3.1 located at the top of the flocculation stirring tank 2 .

1, the sedimentation tank 3 includes an overflow port 3.1, a scraper 3.2, a sludge detection sensor 3.3, a sloping plate assembly 3.4 and an overflow weir 3.5; the bottom of the sedimentation tank 3 and the top of the flocculation stirring tank 2 They are connected through the overflow port 3.1; the scraper 3.2, the sludge detection sensor 3.3, the inclined plate assembly 3.4 and the overflow weir 3.5 are sequentially arranged inside the sedimentation tank 3 from bottom to top. The impurities in the sewage are precipitated on the bottom of the sedimentation tank 3 and the inclined plate assembly 3.4 to form sludge; the precipitated clean water flows through the overflow weir 3.5 to the clean water outlet 3.8; the outlet of the overflow weir 3.5 is provided with water quality testing Sensor 2 3.6, when the water quality detection sensor 2 3.6 detects that the water quality meets the recycling standard, it will be discharged from the clean water outlet 3.8; the bottom of the sedimentation tank 3 is provided with a conical sludge collection port 3.7 connected with the sludge treatment room 5, scraping The sludge machine 4.2 can collect the sludge deposited at the bottom of the sedimentation tank 3 to the conical sludge collecting port 3.7, and then enter the sludge into the sludge treatment room 5 through the sludge water pipeline 3.9.

Referring to Figure 2, the carbon dioxide neutralization system 4.1 includes a storage tank 4.1.1 and a carbon dioxide vaporizer 4.1.2; the carbon dioxide vaporizer 4.1.2 is connected between the storage tank 4.1.1 and the soda-water mixer 2.1, in this embodiment , the carbon dioxide vaporizer 4.1.2 is connected to the steam-water mixer 2.1 in the flocculation stirring tank 2 through the carbon dioxide pipeline 4.1.3.

The flocculant addition system 4.2 includes at least two chemical storage tanks 4.2.1, each of which is provided with a corresponding pipeline connected to the tubular mixer 2.2 or the flocculation stirring tank 2. In this embodiment, the flocculants include PAC (polyaluminum chloride) solution and PAM (polyacrylamide) solution, which are respectively stored in different pharmaceutical storage boxes 4.2.1. In order to ensure the rapid destabilization and aggregation of flocs in sewage, To make the flocs grow continuously, first pass the PAC solution into the tubular mixer 2.2 through the drug A pipeline 4.2.2, and mix it with the sewage fully, first complete the neutralization charge/colloid destabilization to form fine flocs, and then Pass the PAM solution into the stirring chamber of the flocculation stirring tank 2 through the pipeline 4.2.3 of the agent B, and further increase the volume of the flocs, which is convenient for the subsequent full sedimentation in the sedimentation tank 3.

The dosing room 4 also includes an electronic control system 4.3 connected to the carbon dioxide neutralization system 4.1 and the flocculant addition system 4.2 respectively, so as to facilitate the control of the addition sequence and the addition ratio of the chemicals, so as to obtain the optimal sewage treatment effect; In addition, the electronic control system 4.3 is also connected with the pump parts, agitators, sensors and pipeline valves in the sewage treatment plant, which is convenient for intelligent control of the sewage treatment process.

In this embodiment, the two sides of the dosing room 4 are respectively provided with double doors 4.4 and single doors 4.5, which are convenient for the transportation of medicines, and at the same time, it is convenient for personnel to enter the dosing room 4 for operation.

Referring to FIG. 4 , the sludge treatment room 5 includes a feed pump 5.1 and a filter press 5.2; the feed pump 5.1 is connected between the sedimentation tank 3 and the filter press 5.2, and is used to adjust the conical shape of the sedimentation tank 3 The sludge collected by the sludge collecting port 3.7 is sent to the filter press 5.2 through the feeding pipeline 5.7 for dehydration operation, and the sludge is made into a mud cake. The trolley 5.8 transports the mud cake to realize the recovery of the aggregate in the sewage. In this embodiment, the sludge treatment room 5 is divided into upper and lower layers, the bottom layer is the feeding pump maintenance room 5.3, which is convenient for the staff to maintain the feeding pump 5.1; the upper layer is the sludge dewatering room 5.4 where the filter press 5.2 is placed. , The feeding pump maintenance room 5.3 and the sludge dewatering room 5.4 are connected by stairs 5.6. The top of the sludge dewatering room 5.4 is also equipped with a movable canopy 5.5 to prevent external rainwater from entering the sludge treatment room 5.

In this embodiment, the dilution and stirring tank 1, the flocculation stirring tank 2, the sedimentation tank 3, the dosing room 4 and the sludge treatment room 5 are integrated into an integrated box-type sewage treatment device, with a compact structure, reasonable equipment layout, and the top of the sewage treatment device. There are also guardrails 6 to provide safety for the staff.

A sewage treatment method, which adopts the above-mentioned integrated sewage treatment device, includes the following steps:

Step 1: Input the sewage in the concrete mixing station into the dilution mixing tank 1 for mixing and dilution, and conduct the water quality detection of the diluted sewage through the water quality detection sensor 1.4. When the solid content is less than 2000mg/L, the chloride ion content is less than 500mg/L, the sulfate ion content is less than 600mg/L and the pH value is 6 to 9), the diluted sewage is input into the flocculation stirring tank 2 through the water pump 2 1.6; If the water quality meets the recycling standard, the diluted sewage will be output through the reuse outlet 1.9 through the water pump 1.5.

Step 2: In the flocculation stirring tank 2, firstly, the PAC solution with a concentration of 5% to 10% is transported to the tubular mixer 2.2 of the flocculation stirring tank 2 through the flocculant adding system 4.2 in the dosing room 4; The agent adding system 4.2 conveys the PAM solution with a concentration of 1‰ to 2‰ to the stirring chamber in the flocculation stirring tank 2; during the flocculation stirring process, the carbon dioxide neutralization system 4.1 is used to input into the steam-water mixer 2.1 at the bottom of the flocculation stirring tank 2. Carbon dioxide adjusts the PH value of the sewage; among them, the electronic control system 4.3 will adjust the amount of carbon dioxide in the carbon dioxide neutralization system 4.1 according to the signal transmitted by the water quality detection sensor 1.4, so as to achieve the purpose of automatically adjusting the PH value of the sewage;

Step 3: The sewage in the flocculation stirring tank 2 is transported to the sedimentation tank 3, the sewage realizes solid-liquid separation on the inclined plate assembly 3.4, the upper clean water flows to the overflow weir 3.5, and passes through the clear water outlet 3.8 of the sedimentation tank 3. Water quality detection sensor 2 3.6 Perform water quality detection. When the total solid content in the treated sewage is less than 2000mg/L, the chloride ion content is less than 500mg/L, the sulfate ion content is less than 600mg/L and the pH value is 6 to 9, the treated sewage will be treated. The last sewage is output to the sedimentation tank 3 for recycling;

If the water quality does not meet the requirements, it will be transported back to the dilution mixing tank 1 through the pipeline for sewage treatment again;

The sludge deposited on the inclined plate assembly 3.4 flows to the bottom of the sedimentation tank 3, and is collected by the sludge scraper 3.2 into the conical sludge collecting port 3.7 for temporary storage. The electronic control system 4.3 monitors the sludge inventory through the sludge detection sensor 3.3. The signal is used to control the start and stop time of the feeding pump 5.1, so as to achieve the purpose of automatic sludge dewatering.

Step 4: The sludge in the sedimentation tank 3 is input into the sludge treatment room 5, dewatered by the filter press 5.2, and the dewatered mud cake is transported by the transfer trolley 5.8 to realize the recovery of aggregate in the sewage.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. An integrated sewage treatment device is characterized by comprising a diluting and stirring tank (1), a flocculating and stirring tank (2), a sedimentation tank (3) and a sludge treatment room (5) which are communicated in sequence; the flocculation stirring tank (2) is communicated with the flocculation stirring tank (4);

the dosing room (4) comprises a carbon dioxide neutralizing system (4.1) and a flocculating agent adding system (4.2);

a steam-water mixer (2.1) communicated with a carbon dioxide neutralization system (4.1) is arranged in the flocculation stirring tank (2); and a tubular mixer (2.2) communicated with a flocculating agent adding system (4.2) is also arranged in the flocculation stirring tank (2).

2. The integrated sewage treatment device according to claim 1, wherein the diluting and stirring tank (1) comprises a sewage inlet (1.1), a first stirrer (1.2), a water replenishing port (1.3), a first water quality detection sensor (1.4), a first water pump (1.5) and a second water pump (1.6); the sewage inlet (1.1) and the water replenishing port (1.3) are both arranged on the side wall of the dilution stirring tank (1); the stirrer I (1.2), the water quality detection sensor I (1.4), the water pump I (1.5) and the water pump II (1.6) are all arranged inside the diluting and stirring tank (1); the first water pump (1.5) is used for pumping out the sewage in the diluting and stirring tank (1) for recycling, and the second water pump (1.6) is used for conveying the sewage in the diluting and stirring tank (1) to the tubular mixer (2.2) of the flocculating and stirring tank (2).

3. The integrated sewage treatment device according to claim 1 or 2, wherein a plurality of partition plates (2.3) which are staggered in the vertical direction are arranged in the flocculation stirring tank (2), the partition plates (2.3) are combined to form at least two stirring cavities, and adjacent stirring cavities are communicated through S-shaped channels; a second stirrer (2.4) is arranged in each stirring cavity; the stirring cavity at the starting end is communicated with the tubular mixer (2.2), and the stirring cavity at the tail end is communicated with the sedimentation tank (3).

4. The integrated sewage treatment device according to claim 1, wherein the sedimentation tank (3) comprises an overflow port (3.1), a mud scraper (3.2), a sludge detection sensor (3.3), an inclined plate assembly (3.4) and an overflow weir (3.5); the bottom of the sedimentation tank (3) is connected with the top of the flocculation stirring tank (2) through an overflow port (3.1); the sludge scraper (3.2), the sludge detection sensor (3.3), the inclined plate assembly (3.4) and the overflow weir (3.5) are sequentially arranged inside the sedimentation tank (3) from bottom to top.

5. The integrated sewage treatment device according to claim 4, wherein a second water quality detection sensor (3.6) is arranged at the outlet of the overflow weir (3.5); the bottom of the sedimentation tank (3) is provided with a conical sludge collecting opening (3.7) communicated with the sludge treatment room (5).

6. The integrated wastewater treatment plant according to claim 1, wherein the carbon dioxide neutralization system (4.1) comprises a storage tank (4.1.1) and a carbon dioxide vaporizer (4.1.2); the carbon dioxide vaporizer (4.1.2) is connected between the storage tank (4.1.1) and the vapor-water mixer (2.1).

7. An integrated sewage treatment plant according to claim 1, wherein the flocculant addition system (4.2) comprises at least two agent storage tanks (4.2.1), each agent storage tank (4.2.1) being provided with a respective pipe connection to the inside of the pipe mixer (2.2) or the flocculation agitation tank (2).

8. The integrated sewage treatment plant according to any one of claims 1, 6 or 7, wherein the dosing room (4) further comprises an electric control system (4.3) connected with the carbon dioxide neutralization system (4.1) and the flocculant addition system (4.2), respectively.

9. The integrated wastewater treatment plant according to claim 1, wherein the sludge treatment room (5) comprises a feeding pump (5.1) and a filter press (5.2); the feeding pump (5.1) is connected between the sedimentation tank (3) and the filter press (5.2).

10. A sewage treatment method using the integrated sewage treatment apparatus according to any one of claims 1 to 9, comprising the steps of:

the method comprises the following steps: inputting the sewage into a diluting and stirring tank (1) for stirring and diluting, detecting the water quality of the diluted sewage, and inputting the diluted sewage into a flocculating and stirring tank (2) if the water quality does not meet the recycling standard;

step two: in the flocculation stirring pool (2), firstly, a PAC solution with the concentration of 5% -10% is conveyed into a tubular mixer (2.2) of the flocculation stirring pool (2) through a flocculating agent adding system (4.2) in a dosing room (4); then PAM solution with the concentration of 1 per mill-2 per mill is conveyed into the flocculation stirring pool (2) through a flocculating agent adding system (4.2); inputting carbon dioxide into the flocculation stirring tank (2) through a carbon dioxide neutralization system (4.1) in the flocculation stirring process to regulate the pH value of the sewage;

step three: conveying the sewage in the flocculation stirring tank (2) into a sedimentation tank (3), detecting the water quality at a water outlet of the sedimentation tank (3), and outputting the treated sewage out of the sedimentation tank (3) for recycling when the total solid content in the treated sewage is less than 2000mg/L, the chloride ion content is less than 500mg/L, the sulfate ion content is less than 600mg/L and the PH value is 6-9;

step four: and (4) conveying the sludge in the sedimentation tank (3) into a sludge treatment room (5) for treatment and transfer.

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