CN105236615A - Deposition degreaser - Google Patents

Abstract

The invention discloses a sedimentation degreaser with stable water flow in the flocculation area and good flocculation and sedimentation effect, which includes a sedimentation inclined tube, and also consists of an outer cylinder and an inner cylinder, and is formed between the outer cylinder and the inner cylinder. There is a first flocculation zone; a settling inclined tube is installed in the inner cylinder, and the above-mentioned settling inclined tube divides the inner cavity of the inner cylinder up and down into the second flocculation zone at the lower part and the clear water zone at the upper part; the lower part of the inner cylinder is open, The second flocculation zone is connected with the first flocculation zone; a sedimentation zone is set at the lower part of the first flocculation zone and the second flocculation zone; a water inlet tank is set at the upper part of the first flocculation zone, and the water inlet pipe is connected with the water inlet tank; in the above-mentioned clear water zone The upper part is provided with a drainpipe. The precipitation degreaser adopted by the present invention has a compact structure, occupies land and is low in cost, and does not need to add a pressurizing device during operation, thereby saving operation and investment costs.

Description

Precipitation degreaser

technical field

The invention relates to the field of sewage treatment, in particular to a sedimentation degreaser used in production sewage treatment systems in metallurgy, petrochemical, machinery and other industries.

Background technique

A lot of water resources are consumed in many production industries, such as dephosphorization on the surface of steel billets for rolling, water spray cooling, and cooling of multiple steel rolling links such as heating furnaces. The wastewater produced by iron and steel enterprises contains a large amount of impurities such as mineral oil, iron oxide scale, and water-washed slag. In order to prevent the wastewater from harming the environment, it is necessary to treat the wastewater in a harmless manner, which is conducive to recycling. The main purpose of sewage treatment is to remove suspended solid particles and grease, and also includes post-cooling and related subsequent advanced treatment to achieve the purpose of sewage reuse. The iron oxide scale and water-washed slag in the sewage are mainly settled by the swirl tank, and the oily sewage is generally treated by the inclined plate (pipe) sedimentation machine.

For example, the patent number is 952045354, and the utility model patent named "slope plate sedimentation degreaser" discloses the degreaser, because no polymer flocculant is added, so the water outlet pipe and the oil removal pipe need to be installed above the slant plate at the same time. Moreover, when the oily sewage enters the sedimentation degreaser, it is directly added by the water inlet pipe, which will cause disturbance and turbulence in the sewage below the inclined plate, which will directly affect the sedimentation effect of the inclined plate. Another example is Patent No. 2013205301970, a utility model patent named "Chemical Oil Removal Inclined Tube Precipitator". The direction of the second reactor and the direction from the second reactor into the precipitator are all set above the second reactor, so that the part of the sewage entering the second reactor cannot be effectively flocculated, and its agitator not only plays a role The role of full stirring, but also affects the sedimentation effect after flocculation, and the structure of the precipitator body is relatively complex, occupying a large area.

Contents of the invention

The technical problem to be solved in the invention is to provide a sedimentation degreaser with stable water flow in the flocculation zone and good flocculation and sedimentation effect.

The sedimentation degreaser adopted by the present invention to solve its technical problems includes a sedimentation inclined pipe, and also consists of an outer cylinder and an inner cylinder, and a first flocculation zone is formed between the outer cylinder and the inner cylinder; the inner cylinder A settling inclined tube is installed in the middle, and the above-mentioned settling inclined tube divides the inner cavity of the inner cylinder into the lower second flocculation zone and the upper clean water zone; the lower part of the inner cylinder is open, and the second flocculation zone is connected with the first flocculation zone. Set up a sedimentation zone at the lower part of the first flocculation zone and the second flocculation zone; set a water inlet tank at the upper part of the first flocculation zone, and the water inlet pipe communicates with the water inlet tank; set a drainage pipe at the upper part of the clear water zone.

Install a line mixer on the water inlet.

A sewage pipe is installed on the outer cylinder of the sedimentation zone.

The outer cylinder body and the lower part of the inner cylinder body are arranged as a truncated cone structure whose lower section is smaller than the upper section.

A drain tank is arranged on the upper part of the clear water area, and the drain pipe communicates with the drain tank.

The water inlet tank and the drain tank are annular.

The water inlet groove is an annular groove formed by side plates arranged on the inner wall of the outer cylinder or the outer wall of the inner cylinder;

The overflow water level on the water inlet tank is higher than the overflow drain level of the drain tank.

The settling inclined tube is an inclined plate.

The precipitation degreaser adopted by the present invention has a compact structure, occupies land and is low in cost, and does not need to add a pressurizing device during operation, thereby saving operation and investment costs.

Description of drawings

Fig. 1 is the schematic diagram of precipitation degreaser of the present invention;

Fig. 2 is a top view schematic diagram of Fig. 1;

Fig. 3 is another structural schematic diagram of the water inlet tank.

Marks in the figure: 1-outer cylinder, 2-inner cylinder, 3-first flocculation zone, 4-second flocculation zone, 5-sedimentation zone, 6-sewage pipe, 7-settling inclined pipe, 8-inlet tank , 81-inlet level, 82-side plate, 9-drainage tank, 91-drainage level, 92-trough plate, 10-water inlet pipe, 11-pipeline mixer, 12-drainage pipe, 13-clear water area.

detailed description

The specific working process of the sedimentation degreaser of the present invention will be described in detail below in conjunction with the accompanying drawings.

The precipitation degreaser of the present invention is composed of an outer cylinder 1 and an inner cylinder 2, a cavity of the first flocculation zone 3 is formed between the outer cylinder 1 and the inner cylinder 2, and a sedimentation device is installed in the inner cylinder 2 The inclined pipe 7, the above-mentioned sedimentation inclined pipe 7 divides the inner cavity of the inner cylinder 2 into the lower second flocculation area 4 and the upper clear water area 13 . The lower part of the inner cylinder 2 is open, and the second flocculation zone 4 communicates with the first flocculation zone 3 .

A settling zone 5 is set below the first flocculation zone 3 and the second flocculation zone 4 , and a sewage discharge pipe 6 is installed on the outer cylinder 1 of the settling zone 5 .

A water inlet tank 8 is provided on the upper part of the first flocculation zone 3 , and a water inlet pipe 10 communicates with the water inlet tank 8 . The sewage to be treated is injected into the water inlet tank 8 through the water inlet pipe 10 , and then overflows into the first flocculation zone 3 through the water inlet tank 8 . The polymer flocculant can be added in the first flocculation zone 3 or in the water inlet tank 8 . The optimal way is to install a pipeline mixer 11 on the water inlet pipe 10, and the polymer flocculant will spread rapidly and evenly into the entire water body to achieve the purpose of instant mixing. Since the polymer flocculant has already Fully mixed, and the sewage enters the first flocculation zone 3 in the form of overflow, the sewage disturbs the sewage in the first flocculation and sedimentation zone 3 less, and reduces the possibility of the suspended particles in the sewage aggregating into large particles. Interference, to facilitate precipitation in the precipitation zone 5.

After the sewage settled in the first flocculation zone 3 enters the second flocculation zone 4 from below, it flows upwards and is blocked by the sedimentation inclined pipe 7, and the remaining suspended particles that have not settled in the first flocculation zone 3 go down again in the sedimentation zone 5 precipitation. When the sewage deposited in the sedimentation area 5 needs to be discharged, the sewage pipe 6 is opened to be discharged and recovered. And the clear water passing through the settling inclined pipe 7 passes upwards through the settling inclined pipe 7 and enters the clear water area 13 . A drainpipe 12 is arranged on the upper part of the clean water area 13 to discharge the flocculated and settled clean water to the outside and recycle it for secondary use.

In order to facilitate the concentrated discharge of the sludge in the sedimentation area 5 after precipitation, the lower parts of the outer cylinder 1 and the inner cylinder 2 are set as a frustum of cone structure with a lower cross section smaller than the upper cross section. The cross sections of the outer cylinder 1 and the inner cylinder 2 can be circular, rectangular or polygonal.

In order to reduce the local water flow disturbance when the drain pipe 12 is discharged outwards, an annular drain tank 9 is arranged on the top of the clean water area 13, and the clean water also enters the drain tank 9 by overflowing, and the drain pipe 12 communicates with the drain tank 9. The overflow water inlet liquid level 81 on the water inlet tank 8 is higher than the overflow drainage liquid level 91 of the drainage tank 9, so that the sewage of the sedimentation degreaser of the present invention can automatically complete the flow of sewage without adding other booster pumps , save energy and equipment costs, and the water flow is stable, which is convenient for flocculation and sedimentation.

The structure of water inlet tank 8 is as shown in Figure 1 and Figure 2, is to arrange side plate 82 on the inner wall of outer cylinder body 1, forms annular groove, also can as shown in Figure 3, arrange side plate 82 on the outer wall of inner cylinder body 2 The plate 82 forms an annular groove. The overflow water inlet surface 81 of the water inlet tank 8 is exactly the upper edge of the side plate 82 . The structure of the drainage groove 9 is shown in Figures 1 and 2, and a groove plate 92 is arranged on the inner wall of the inner cylindrical body 2 to form an annular groove. The overflow drainage liquid surface 91 of the drainage groove 9 is exactly the upper edge of the groove plate 92 .

The inclined plate structure of the same settling principle can also be adopted for the settling inclined pipe 7, which can also achieve the purpose of the present invention.

Although the present invention has been described in detail above in conjunction with the accompanying drawings and embodiments, it should be clear to those skilled in the art that various modifications can be made to the above embodiments without departing from the spirit and scope of the claims, all of which are within the scope of the present invention. within the scope of protection.

Claims (9)

1. The sedimentation degreaser, including the sedimentation inclined pipe, is characterized in that, Composed of an outer cylinder (1) and an inner cylinder (2), a first flocculation zone (3) is formed between the outer cylinder (1) and the inner cylinder (2); A sedimentation inclined pipe (7) is installed in the inner cylinder (2), and the above-mentioned sedimentation inclined pipe (7) divides the inner cavity of the inner cylinder (2) up and down into the second flocculation zone (4) in the lower part and the second flocculation zone (4) in the upper part. Clear Water District (13); The lower part of the inner cylinder (2) is open, and the second flocculation zone (4) communicates with the first flocculation zone (3); A sedimentation zone (5) is set at the lower part of the first flocculation zone (3) and the second flocculation zone (4); A water inlet tank (8) is arranged on the upper part of the first flocculation zone (3), and the water inlet pipe (10) communicates with the water inlet tank (8); A drainage pipe (12) is arranged on the top of the above-mentioned clear water area (13). 2. The sedimentation degreaser according to claim 1, characterized in that a pipeline mixer (11) is installed on the water inlet pipe (10). 3. The sedimentation oil remover according to claim 1, characterized in that, a sewage pipe (6) is installed on the outer cylinder (1) of the sedimentation area (5). 4. The sedimentation degreaser according to claim 1 or 3, characterized in that, the lower parts of the outer cylinder (1) and the inner cylinder (2) are configured as a frustum of cone structure with a lower cross-section smaller than an upper cross-section. 5. The sedimentation degreaser according to claim 1, characterized in that, a drain tank (9) is arranged on the upper part of the clear water area (13), and the drain pipe (12) communicates with the drain tank (9). 6. The sedimentation oil remover according to claim 5, characterized in that, the water inlet tank (8) and the drainage tank (9) are annular. 7. The sedimentation degreaser according to claim 6, characterized in that, the water inlet tank (8) is a side plate (82) arranged on the inner wall of the outer cylinder (1) or the outer wall of the inner cylinder (2) ) formed annular groove; the drainage groove (9) is an annular groove formed by setting a groove plate (92) on the inner wall of the inner cylinder 2. 8. The precipitation degreaser as claimed in claim 5, characterized in that the overflow water level (81) on the water inlet tank (8) is higher than the overflow drain level (91) of the drain tank (9) . 9. The settling oil remover according to claim 1, characterized in that, the settling inclined pipe (7) is a sloping plate.