CN213141793U - Continuous thickening tower of mud and sludge treatment system - Google Patents

Abstract

The utility model relates to a sludge continuous concentration tower and a sludge treatment system, which comprises a tower body and a contraction section which are connected up and down, wherein the tower body is provided with an overflow weir, the cross section area of the contraction section is gradually reduced from top to bottom, and the bottom of the contraction section is provided with a sludge discharge port; the sludge discharge device comprises a sludge discharge port, a sludge guide pipe and a sludge discharge pipe, wherein the sludge discharge port is arranged in the tower body, the sludge guide pipe extends into the tower body, the sludge guide pipe and the tower body share the same central axis, the distance between the lower end of the sludge guide pipe and the sludge discharge port is 1/6-1/2 of the length of the sludge continuous concentration tower, the upper end of the sludge guide pipe is communicated with a groove body, and a screen is arranged in the groove; the overflow weir is higher than the lower end of the sludge guide pipe. The utility model can realize the continuous concentration treatment of the sludge, and has higher efficiency; the utility model discloses a sludge treatment system adaptability is wide, and applicable in the sludge pretreatment of various sewage productions, can realize the continuous concentrated dehydration of mud and carry out the mud in step and take care of, overcomes the weak point that exists in current sludge pretreatment equipment technique and can only concentrated dehydration, can not take care of in step.

Description

Continuous thickening tower of mud and sludge treatment system

Technical Field

The utility model belongs to a continuous thickening tower of mud and sludge treatment system.

Background

With the economic development and the urbanization process of China being accelerated, the problem of water pollution is increasingly prominent, and the discharge amount of sewage is on a rapidly increasing trend. According to incomplete statistics, the treatment capacity of domestic sewage facilities in cities and towns in China reaches 1.5 hundred million m by the end of 2014³And d, the sewage treatment rate reaches 80 wt.%. The energy-saving and emission-reducing targets continue to be promoted in the 'twelve five' period, the standard of China on the effluent quality of municipal sewage treatment plants is continuously improved, and the first-level A standard is implemented when the effluent of municipal sewage treatment plants is discharged into key watersheds determined by China and provinces, closed and semi-closed water areas such as lakes, reservoirs and the like according to the pollutant discharge standard of municipal sewage treatment plants. At present, the sewage treatment industry in China is rapidly developed and faces a plurality of problems and challenges, which are mainly reflected in the following 3 aspects: (1) the construction fund is short, the construction of a sewage treatment plant needs great fund investment, and the lack of the fund becomes a great obstacle for limiting sewage treatment; (2) the operation cost of the sewage treatment plant is high, so that a lot of equipment of the sewage treatment plant becomes furnishings; (3) the settled sludge is low in concentration and only 1-2 wt.% and is difficult to dewater, so that a large amount of dewatering equipment is needed in the dewatering process, the equipment investment is large, the land is occupied, in addition, the water content of the dewatered sludge is high and reaches 75-80 wt.%, the sludge is large in volume, the annual sludge production amount reaches more than 3000 million tons, a large amount of land is needed to be occupied for landfill, harmful bacteria are contained in the sludge, secondary pollution is generated after landfill, and the underground pollution generated by the landfill is difficult to restore. Before sludge is dewatered and landfilled, pretreatment such as concentration, conditioning, flocculation and the like is generally needed, and how to carry out economic and efficient treatment is an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, one of the purposes of the utility model is to provide a sludge continuous concentration tower to realize the continuous and high-efficiency concentration of sludge; the second purpose of the utility model is to provide a sludge treatment system,

in order to solve the technical problem, the utility model discloses a technical scheme does:

a continuous sludge concentration tower comprises a tower body and a contraction section which are connected up and down, wherein an overflow weir is arranged on the tower body, the cross section area of the contraction section is gradually reduced from top to bottom, and a sludge discharge port is arranged at the bottom of the contraction section; the sludge discharge device comprises a sludge discharge port, a sludge guide pipe and a sludge discharge pipe, wherein the sludge discharge port is arranged in the tower body, the sludge guide pipe extends into the tower body, the sludge guide pipe and the tower body share the same central axis, the distance between the lower end of the sludge guide pipe and the sludge discharge port is 1/6-1/2 of the length of the sludge continuous concentration tower, the upper end of the sludge guide pipe is communicated with a groove body, and a screen is arranged in the groove; the overflow weir is higher than the lower end of the sludge guide pipe.

Furthermore, the mesh of the screen is a square hole, and the size of the mesh is 2 multiplied by 2 cm. Optionally, the screen is a stainless steel filter screen.

Further, the top of cell body is equipped with into mud mouth, it has into mud pipe to advance mud mouth intercommunication, advances to install the manometer on the mud pipe, so, through the gauge pressure of manometer, can judge the impurity condition in the cell body, when manometer pressure reached the setting value, need carry out the debris clearance to the cell body.

Furthermore, the lower end of the mud guiding pipe is in a bell mouth shape.

Further, the constriction is tapered to change the sludge flow direction to avoid as much as possible adverse disturbances of the settled sludge.

The screen is arranged in the tank body, and when sludge enters the tank body, the screen can separate and retain larger impurities in the sludge, so that a sludge guide pipe and a sludge pump are prevented from being blocked; then, the sludge guide pipe guides the sludge entering from the top of the tower to the lower part of the tower, the sludge flows through the sludge guide pipe, the sludge continues to flow downwards under the action of gravity, water flows upwards in a baffling manner, so that sludge-water separation is realized, the sludge carried by the water continuously flows downwards under the action of gravity in the upward flowing process, the water quality is increasingly clear, the sludge finally overflows from an overflow weir at the upper part of the tower, the sludge flowing downwards in the baffling manner slowly flows downwards, the concentration is increasingly high until the sludge sinks to be close to a sludge discharge port, the sludge is finally discharged through the sludge discharge port, and the concentration after the sludge concentration can be controlled by controlling the discharge flow.

A sludge treatment system comprises a one-way valve, a first pump and a filter-pressing fore-tank which are sequentially communicated, wherein the inlet end of the one-way valve is communicated with the continuous sludge concentration tower; still include the medicament groove, the export intercommunication in medicament groove has the second pump, the export intercommunication of second pump is on the pipeline between check valve and the first pump.

The agent tank can be used for storing or preparing a conditioner liquid medicine, the liquid medicine is pumped into the front end of the first pump through the second pump, so that the liquid medicine and the sludge are fully mixed when passing through the first pump, and are flocculated in the pipeline, and sludge conditioning equipment can be saved. The one-way valve can prevent the liquid medicine from flowing into the sludge continuous concentration tower.

The pre-filter-pressing tank can be used for storing a certain amount of conditioned sludge, so that the filter press can be ensured to continuously obtain the sludge.

Furthermore, a first stirring mechanism is arranged in the filter-pressing front tank, so that the regulated sludge concentration can be ensured to be uniform, and the sludge is prevented from being settled to the bottom of the tank in a layered manner.

Further, a second stirring mechanism is arranged in the medicament tank.

Further, an outlet of the filter pressing front groove is communicated with a third pump.

Further, the sludge discharging device is installed at the bottom of the filter pressing front tank, so that sludge in the tank can be discharged completely when the production is stopped conveniently, and the sludge is prevented from being accumulated at the bottom of the tank to influence the sludge dewatering effect of later-stage production.

The utility model can realize the continuous concentration treatment of the sludge, and has higher efficiency; the utility model discloses a sludge treatment system adaptability is wide, can be applicable in the sludge pretreatment that various sewage produced, can realize that mud is concentrated dehydration in succession and carries out the mud in step and take care of, has overcome the shortcoming that can only concentrate dehydration, can not take care of in step that exists in current sludge pretreatment equipment technique, when being used for the sludge pretreatment, can improve 4~6wt.% with mud concentration from 1~2wt.%, guarantee that follow-up pressure filter advances mud under the best mud concentration that advances, improved the dehydration efficiency of pressure filter; additionally, the utility model discloses a sludge treatment system compact structure, first pump play pump sending and mixing effect simultaneously, and equipment area is little, and equipment total investment is lower.

The utility model discloses a sludge treatment system can adopt DCS control, and degree of automation is high, realizes automatic row's mud and drainage.

The utility model discloses a various specifications can be made to the sludge treatment system, have great popularization and application and worth in the sludge treatment field.

Drawings

FIG. 1 is a schematic structural view of a continuous sludge thickening tower according to a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a sludge treatment system of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

Referring to fig. 1, a continuous sludge concentration tower comprises a tower body 501 and a contraction section 502 which are integrally connected from top to bottom, wherein an overflow weir 504 is arranged on the tower body 501, the cross-sectional area of the contraction section 502 is gradually reduced from top to bottom, and a sludge discharge opening 503 is arranged at the bottom of the contraction section 502; the device is characterized by further comprising a sludge guide pipe 4 extending into the tower body 501, the sludge guide pipe 4 and the tower body 501 share the same central axis, the distance between the lower end of the sludge guide pipe 4 and the sludge discharge port 503 is 1/3 of the length of the continuous sludge concentration tower, the upper end of the sludge guide pipe 4 is communicated with a tank body 2, and a screen 3 is arranged in the tank body 2; the overflow weir 504 is higher than the lower end of the sludge guide pipe 4.

The mesh of the screen 3 is a square hole, and the size of the mesh is 2 multiplied by 2 cm.

The top of the tank body 2 is provided with a sludge inlet 201, the sludge inlet 201 is communicated with a sludge inlet pipe 1, and the sludge inlet pipe 1 is provided with a pressure gauge 101.

The lower end of the mud guiding pipe 4 is in a bell mouth shape.

The constriction 502 is tapered.

Preferably, the overflow weir is arranged along the inner side of the tower, the effective height of the overflow weir is 20cm, the distance between the weir side and the inner side of the tower body is 13cm, the top of the overflow weir is 15cm lower than the top of the tower, and 2 symmetrical clear water discharge ports are arranged on the tower side at the bottom of the overflow weir groove. Optionally, draw the mud pipe to be fixed in on the tower body through many spinal branchs vaulting pole 12, for example, the one end of bracing piece 12 is fixed in the tower body inner wall, and on the one end of bracing piece was fixed in and draws the mud pipe outer wall, the concrete quantity of bracing piece can be according to fixed needs, reasonable regulation and control, and is optional, many spinal branchs vaulting pole 12 divide into 2 at least groups, are fixed in the different height position that draws the mud pipe respectively to realize more stable fixed.

Referring to fig. 1 and 2, a sludge treatment system, which comprises a check valve 6, a first pump 7 and a pre-filter-pressing tank 8 which are communicated in sequence, wherein the inlet end of the check valve 6 is communicated with a continuous sludge concentration tower as defined in any one of claims 1 to 5; the medicine tank is characterized by further comprising a medicine tank 10, an outlet of the medicine tank 10 is communicated with a second pump 11, and an outlet of the second pump 11 is communicated with a pipeline between the one-way valve 6 and the first pump 7. The outlet of the first pump 7 is communicated with the top of the pre-filter-pressing tank 8.

And a first stirring mechanism is arranged in the filter-pressing front tank 8.

A second stirring mechanism is arranged in the medicament tank 10.

The outlet of the pre-filter-pressing tank 8 is communicated with a third pump 9, optionally, the outlet of the third pump is communicated with a filter press, and the third pump 9 can conveniently pump sludge in the pre-filter-pressing tank into the filter press for deep dehydration.

During treatment, after sludge with the concentration of 1-2 wt.% is pumped to the tank body 2, impurities in the sludge are intercepted by the screen, the sludge continuously flows downwards through the sludge guide pipe, flows to the outlet of the pipeline, and then continuously flows downwards under the action of gravity to sink to the position near the sludge discharge port, and finally is conditioned by the first pump; during the period, the sewage flows upwards in a baffling way after contacting the sludge layer, flows into the overflow weir and finally leaves the sludge concentration tower through the clear water outlet. The sludge sinking to the bottom of the tower flows out from the bottom of the tower, and is mixed with the sludge conditioner after passing through the sludge discharge port and the one-way valve, the sludge conditioner and the sludge are fully mixed under the stirring action of the first pump, the addition amount of the medicament can be determined according to the amount of the sludge, and the conditioned sludge with stable flow is obtained after conditioning. The applicant has found through experiments that by adopting the process and the device, the sludge with the concentration of 1-2 wt.% can be concentrated to the concentration of 4-6 wt.%.

In conclusion, the concentrated dehydration and conditioning effects of the application are better.

The above-mentioned embodiments are illustrative and should not be construed as limiting the scope of the invention, which is defined by the appended claims, and all modifications of the equivalent forms of the present invention which are obvious to those skilled in the art after reading the present invention.

Claims (9)

1. A sludge continuous concentration tower comprises a tower body (501) and a contraction section (502) which are connected up and down, wherein an overflow weir (504) is arranged on the tower body (501), the cross section area of the contraction section (502) is gradually reduced from top to bottom, and a sludge discharge port (503) is arranged at the bottom of the contraction section (502); the device is characterized by further comprising a sludge guide pipe (4) extending into the tower body (501), wherein the sludge guide pipe (4) and the tower body (501) share the same central axis, the distance between the lower end of the sludge guide pipe (4) and a sludge discharge port (503) is 1/6-1/2 of the length of the continuous sludge concentration tower, the upper end of the sludge guide pipe (4) is communicated with a tank body (2), and a screen (3) is arranged in the tank body (2); the overflow weir (504) is higher than the lower end of the sludge guide pipe (4).

2. The sludge continuous thickening tower according to claim 1, wherein the mesh of the screen (3) is a square hole, and the size of the mesh is 2 x 2 cm.

3. The continuous sludge concentration tower according to claim 1, wherein a sludge inlet (201) is arranged at the top of the tank body (2), the sludge inlet (201) is communicated with a sludge inlet pipe (1), and a pressure gauge (101) is arranged on the sludge inlet pipe (1).

4. The sludge continuous thickening tower according to claim 1, wherein the lower end of the sludge guiding pipe (4) is flared.

5. The continuous sludge thickening tower according to claim 1, wherein the constriction (502) is conical.

6. A sludge treatment system, which is characterized in that a one-way valve (6), a first pump (7) and a filter-pressing fore groove (8) are communicated in sequence, wherein the inlet end of the one-way valve (6) is communicated with a sludge continuous concentration tower as claimed in any one of claims 1 to 5; the medicine injection device is characterized by further comprising a medicine groove (10), wherein an outlet of the medicine groove (10) is communicated with a second pump (11), and an outlet of the second pump (11) is communicated with a pipeline between the one-way valve (6) and the first pump (7).

7. The sludge treatment system according to claim 6, wherein a first stirring mechanism is provided in the pre-filter-pressing tank (8).

8. The sludge treatment system according to claim 6, wherein a second stirring mechanism is provided in the chemical tank (10).

9. The sludge treatment system according to claim 6, wherein the outlet of the pre-filter-pressing tank (8) is communicated with a third pump (9).

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