CN206069481U - A kind of device for production waste pretreatment - Google Patents

Abstract

This utility model relates to a device for pretreatment of industrial wastewater. The device includes a wastewater tank for holding wastewater, a flocculation tank connected to the wastewater tank, a chemical tank connected to the flocculation tank, and a drainage pipe. Industrial wastewater from the wastewater tank is transported to the flocculation tank for pretreatment. Solid suspended matter in the wastewater flocculates and settles under the action of chemicals in the chemical tank, and is discharged from the bottom of the flocculation tank. The upper liquid is discharged through the drainage pipe. Compared with existing technologies, this utility model uniformly disperses powdered flocculant in water in the chemical tank before adding it to the flocculation tank. By having the two flocculation tanks work alternately, the continuity of the industrial wastewater pretreatment process is ensured, greatly improving the effective utilization rate of the flocculant and the treatment efficiency of the industrial wastewater, while reducing labor costs.

Description

A device for pretreatment of sewage

technical field

The utility model belongs to the technical field of sewage treatment, and relates to a device for pretreatment of production sewage.

Background technique

The sewage pretreatment device is a pretreatment facility set up according to the water quality requirements of the subsequent treatment process before the sewage enters the traditional sedimentation and biological treatment. It is the throat of the sewage treatment plant. Sewage pretreatment technologies mainly include coagulation, sedimentation and so on.

The existing production sewage pretreatment device mainly has the following defects:

1. The sediment at the bottom of the pool is manually fished, which is not only labor-intensive, but also unable to clean the sediment, especially in very hot weather, a large amount of sediment will produce toxic gas hydrogen sulfide due to corrosion, causing safety hazards ;

2. The dosage method of the agent is unreasonable. Usually, the flocculant powder is directly added, which often leads to incomplete coagulation of flocs due to uneven dispersion of the flocculant;

3. Generally, the flocs are floated up through the air flotation process, but due to the artificial scum removal method, the flocs cannot be completely removed, and the flocs will be broken at the same time;

4. The treatment capacity is limited, each time the treatment capacity is about one cubic meter of wastewater, the work efficiency is low, and the labor cost is increased;

5. The treated wastewater is still relatively turbid, and a subsequent sand filter device needs to be added, but basically the sand filter device has been shut down and discarded, so the actual treated wastewater still does not meet the urban sewer discharge standards in some respects, such as chemical oxygen demand The amount is greater than 1000ppm, and the content of suspended solids in water is greater than 400mg/L.

Utility model content

The purpose of this utility model is to provide a device for pretreatment of production sewage with high treatment efficiency in order to overcome the above-mentioned defects in the prior art.

The purpose of this utility model can be achieved through the following technical solutions:

A device for pretreatment of sewage, the device includes a sewage tank containing sewage, a flocculation tank connected to the sewage tank, a chemical tank and a drainage pipeline respectively connected to the flocculation tank, and the sewage tank The production sewage in the production sewage is transported to the flocculation tank for pretreatment. The solid suspended matter in the production sewage is flocculated and then settled under the action of the chemical in the chemical tank, and is discharged from the bottom of the flocculation tank, and the upper liquid is discharged through the drainage pipeline.

As a preferred technical solution, the length, width and depth of the sewage pool are all 1.5m.

There are two flocculation barrels in total, which are respectively connected with the sewage tank, the chemical medicine barrel and the drainage pipeline. When the production sewage in one of the flocculation buckets reaches the set value, it immediately switches to the other flocculation bucket to continue working. The flocculation bucket agitator in the flocculation bucket can fully mix the production sewage and the chemical agent, and ensure that the suspended solids in the production sewage are fully coagulated.

As a preferred technical solution, the material of the flocculation bucket is plastic, which can improve corrosion resistance, and the volume of the flocculation bucket is 5m ³ .

The top of the flocculation bucket is respectively provided with a water inlet pipeline and a medicine feeding pipeline connected with the sewage tank and the chemical medicine bucket, and the side of the flocculation bucket is provided with an outlet pipeline connected with the drainage pipeline.

The side of the flocculation bucket is also provided with an overflow pipeline connected with the sewage tank, the liquid level of the overflow pipeline is higher than the outlet pipeline, when the sewage liquid level in the flocculation bucket is higher than the When the liquid level is high, the sewage will flow back to the sewage tank through the overflow pipe, effectively preventing the sewage in the flocculation bucket from overflowing due to human negligence.

A water inlet valve, a medicine outlet valve, a water outlet valve and an overflow valve are respectively arranged on the water inlet pipeline, the medicine feeding pipeline, the water outlet pipeline and the overflow pipeline.

The bottom of the flocculation bucket is provided with a sediment discharge valve and a filter in sequence from top to bottom, and a return water pipeline is provided between the filter and the sewage tank.

The sewage pool is provided with a sewage pump and a float valve for controlling the operation of the sewage pump, and the sewage pump is respectively connected with each flocculation bucket through the water inlet pipeline.

There are two sewage pumps and ball float valves respectively, and each sewage pump is controlled by a ball float valve. When one sewage pump is in working condition, the other sewage pump is closed as a standby sewage pump.

The delivery flow rate of the sewage pump is preferably 10m ³ /h.

The sewage pool is also provided with an exhaust fan for discharging the toxic gas in the sewage pool out of the sewage pool.

The sewage tank, the flocculation bucket and the chemical medicine bucket are respectively provided with a sewage tank agitator, a flocculation bucket agitator and a chemical medicine bucket agitator.

The material of described chemical medicine bucket is plastic or stainless steel, and volume is preferably 100L, and the mass concentration of medicament solution in the chemical medicine bucket is 2g/L, and its preparation process is as follows:

First add water to the chemical tank gradually, when the water level in the chemical tank submerges the impeller of the chemical tank agitator, add the flocculant polyacrylamide or polyaluminum chloride into the chemical tank to make it in the chemical tank Slowly mix with water while stirring with a bucket agitator. With the continuous consumption of the medicament solution, when the medicament solution in the chemical barrel decreases, replenish the medicament solution in time to keep enough medicament solution in the chemical barrel.

The whole device is set on a steel operating platform, the length, width and height of which are 7.0m, 3.5m and 3.0m respectively.

The working process of the present utility model is as follows:

Transfer the production sewage in the sewage tank from the water inlet pipeline to the flocculation bucket through the sewage pump; turn on the agitator of the flocculation bucket and stir for 10 minutes; according to the amount of production sewage in the flocculation bucket, add the chemical solution into the flocculation bucket through the dosing pipeline , and stirred for 10 minutes, and then left to settle for 30 minutes; discharge the upper liquid in the flocculation bucket to the drainage pipeline through the outlet pipe; slowly open the sediment discharge valve at the bottom of the flocculation bucket, and slowly discharge the liquid-containing sediment at the bottom of the flocculation bucket to the filter In the process, the filtered liquid flows back to the sewage tank through the return pipe, and the remaining sediment is bagged and transported away.

Compared with the prior art, the utility model has the following characteristics:

1) A sewage tank agitator is installed in the sewage tank to disperse the suspended solids in the production sewage evenly, and then the production sewage containing suspended solids is transported to the flocculation bucket by the sewage pump for pretreatment, and at the same time, the produced sewage Toxic gas is discharged through the exhaust fan in time to eliminate potential safety hazards;

2) The floating ball valve automatically controls the operation of the sewage pump according to the liquid level of the produced sewage in the sewage pool, with fast adjustment speed and sensitive response. At the same time, it can also be assisted by manual control according to actual needs, with good flexibility;

3) Disperse the powdery flocculant evenly in the water in the chemical tank first, and then add it into the flocculation tank, which improves the effective utilization rate of the flocculant, and at the same time helps to improve the flocculation effect of suspended solids. In the liquid, the chemical oxygen demand is less than 700ppm, and the content of suspended solids is less than 200mg/L;

4) The two flocculation barrels work alternately to ensure the continuity of the production sewage pretreatment process and greatly improve the treatment efficiency of the production sewage;

5) The degree of automation is high, which greatly reduces labor costs.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Instructions for marks in the figure:

1—chemical barrel, 2—chemical barrel agitator, 3—water inlet valve, 4—water outlet valve, 5—chemical outlet valve, 6—sediment discharge valve, 7—sewage pump, 8—float valve, 9—row Fan, 10—flocculation bucket, 11—flocculation bucket agitator, 12—sewage tank agitator, 13—sewage tank, 14—overflow pipeline, 15—water outlet pipeline, 16—drainage pipeline, 17—water inlet pipeline , 18—dosing pipeline, 19—return water pipeline, 20—overflow valve, 21—filter.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the utility model, and the detailed implementation and specific operation process are given, but the protection scope of the utility model is not limited to the following examples.

Example:

As shown in Figure 1, a device for producing sewage pretreatment, the device includes a sewage tank 13 containing sewage, a flocculation bucket 10 connected to the sewage tank 13, and a chemical tank 1 connected to the flocculation bucket 10 respectively , drainage pipeline 16, transport the production sewage in the sewage tank 13 to the flocculation bucket 10 for pretreatment, the suspended solids in the production sewage will settle after flocculation under the action of the medicament in the chemical medicine bucket 1, and will be discharged from the flocculation bucket 10 is discharged from the bottom, and the upper liquid is discharged through the drainage pipeline 16.

Among them, there are two flocculation barrels 10 in total, and they are respectively connected with the sewage pool 13, the chemical medicine barrel 1 and the drainage pipeline 16.

The top of the flocculation bucket 10 is respectively provided with a water inlet pipeline 17 and a dosing pipeline 18 communicating with the sewage tank 13 and the chemical medicine bucket 1 , and the side of the flocculation bucket 10 is provided with an outlet pipeline 15 communicating with the drainage pipeline 16 . The side of the flocculation bucket 10 is also provided with an overflow pipeline 14 communicating with the sewage tank 13 , and the liquid level of the overflow pipeline 14 is higher than that of the outlet pipeline 15 . A water inlet valve 3 , a medicine outlet valve 5 , a water outlet valve 4 and an overflow valve 20 are respectively provided on the water inlet pipeline 17 , the medicine feeding pipeline 18 , the water outlet pipeline 15 and the overflow pipeline 14 .

The bottom of the flocculation bucket 10 is provided with a sediment discharge valve 6 and a filter 21 sequentially from top to bottom, and a return water pipeline 19 is provided between the filter 21 and the sewage tank 13 .

The sewage pool 13 is provided with a sewage pump 7 and a float valve 8 for controlling the operation of the sewage pump 7 , and the sewage pump 7 is respectively connected with each flocculation bucket 10 through a water inlet pipeline 17 . The sewage pond 13 is also provided with an exhaust fan 9 that discharges the toxic gas in the sewage pond 13 out of the sewage pond 13 .

A sewage tank agitator 12 , a flocculation bucket agitator 11 and a chemical medicine bucket agitator 2 are respectively arranged in the sewage tank 13 , the flocculation bucket 10 and the chemical medicine bucket 1 .

The mass concentration of the medicament solution in the chemical barrel 1 is 2g/L, and its preparation process is as follows:

First add water gradually to the chemical tank 1, when the water level in the chemical tank 1 submerges the impeller of the chemical tank agitator 2, add the flocculant polyacrylamide or polyaluminum chloride to the chemical tank 1, so that It is slowly mixed with water under the agitation of chemical tank agitator 2. When the chemical solution in the chemical tank 1 decreases, replenish the chemical solution in time to keep enough chemical solution in the chemical tank 1 .

The working process of the device is as follows:

Through the sewage pump 7, the production sewage in the sewage pool 13 is transported to the flocculation bucket 10 by the water inlet pipeline 17; the flocculation bucket agitator 11 is turned on, and stirred for 10 minutes; Add the medicament solution into the flocculation bucket 10, stir for 10 minutes, and then let it settle for 30 minutes; discharge the upper liquid in the flocculation bucket 10 to the drainage pipeline 16 through the outlet pipeline 15; slowly open the sediment discharge valve 6 at the bottom of the flocculation bucket 10 , slowly discharge the liquid-containing sediment at the bottom of the flocculation bucket 10 into the filter 21, the filtered liquid flows back to the sewage tank 13 through the return line 19, and the remaining sediment is bagged and transported away.

The above description of the embodiments is for those of ordinary skill in the technical field to understand and use the utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described here to other embodiments without creative efforts. Therefore, the utility model is not limited to the above-mentioned embodiments, and improvements and modifications made by those skilled in the art according to the disclosure of the utility model without departing from the category of the utility model should be within the protection scope of the utility model.

Claims (9)

1. a device for producing sewage pretreatment, it is characterized in that, this device comprises the cesspool (13) of splendid attire sewage, the flocculation barrel (10) that is communicated with cesspool (13) and respectively with flocculation barrel (10 ) is connected to the chemical barrel (1) and the drainage pipeline (16), and the production sewage in the sewage tank (13) is transported to the flocculation bucket (10) for pretreatment, and the suspended solids in the production sewage Under the action of the chemicals in the chemical tank (1), the flocculation occurs and then settles, and is discharged from the bottom of the flocculation tank (10), and the upper liquid is discharged through the drainage pipeline (16). 2. A kind of device for producing sewage pretreatment according to claim 1, is characterized in that, described flocculation barrel (10) is provided with 2 altogether, and respectively with sewage pool (13), chemical medicine barrel (1) and drainage pipeline (16) are connected. 3. A kind of device for producing sewage pretreatment according to claim 2, it is characterized in that, the top of described flocculation barrel (10) is respectively provided with sewage pool (13), chemical medicine barrel (1) The water inlet pipeline (17) and the medicine injection pipeline (18) are connected together, and the water outlet pipeline (15) connected with the drainage pipeline (16) is provided on the side of the flocculation bucket (10). 4. A kind of device for producing sewage pretreatment according to claim 3, is characterized in that, the side of described flocculation barrel (10) is also provided with the overflow pipeline that communicates with sewage tank (13) (14), the liquid level of this overflow pipeline (14) is higher than the outlet pipeline (15). 5. A kind of device for producing sewage pretreatment according to claim 4, is characterized in that, described water inlet pipeline (17), dosing pipeline (18), water outlet pipeline (15) and overflow The pipeline (14) is respectively provided with a water inlet valve (3), a medicine outlet valve (5), a water outlet valve (4) and an overflow valve (20). 6. A device for producing sewage pretreatment according to claim 3, characterized in that, the bottom of the flocculation bucket (10) is provided with a sediment discharge valve (6) and a filter sequentially from top to bottom (21), a return water pipeline (19) is provided between the filter (21) and the sewage tank (13). 7. A device for producing sewage pretreatment according to claim 3, characterized in that, the sewage pool (13) is provided with a sewage pump (7) and a float for controlling the operation of the sewage pump (7). The ball valve (8), the sewage pump (7) are respectively communicated with each flocculation bucket (10) through the water inlet pipeline (17). 8. A kind of device for producing sewage pretreatment according to claim 7, it is characterized in that, also be provided with in described sewage pool (13) the poisonous gas in sewage pool (13) is discharged out of sewage pool (13) exhaust fan (9). 9. A kind of device for producing sewage pretreatment according to claim 2, is characterized in that, described sewage pool (13), flocculation barrel (10) and chemical medicine barrel (1) are respectively provided with sewage Pool agitator (12), flocculation bucket agitator (11) and chemical medicine bucket agitator (2).