CN102249448B

CN102249448B - System suitable for comprehensively treating bottom sediments in city inland river

Info

Publication number: CN102249448B
Application number: CN2011101166458A
Authority: CN
Inventors: 汪群慧; 马鸿志; 艾恒雨; 张文毓; 左彦东; 范元国
Original assignee: University of Science and Technology Beijing USTB
Current assignee: University of Science and Technology Beijing USTB
Priority date: 2011-05-06
Filing date: 2011-05-06
Publication date: 2012-11-28
Anticipated expiration: 2031-05-06
Also published as: CN102249448A

Abstract

The invention belongs to the field of environmental protection, and relates to a system suitable for comprehensively treating bottom sediments in a city inland river. The bottom sediments are effectively extracted by a cutter-suction water pump, sand settlement is performed according to the actual condition of the bottom sediments, and the obtained sand can be used as building sand; upper-layer mud water is conveyed to a flocculating tank through a sewage pump, the settlement of suspended particles in the mud water is accelerated, effluent flows into a precipitating tank to be further precipitated, and sludge at the bottoms of the flocculating tank and the precipitating tank is conveyed to a rear-end sludge dehydrator and dehydrated by combining a dehydrating agent with a belt dehydrator, so that sludge with the water content of about 50 percent is obtained and transported to be recycled; and flocculation effluent has reached the discharge standard, and can be used for a sludge dehydrating working section or directly discharged to a river channel to supplement a water body, and odor generated in the dehydrating process can be treated by a deodorizing device. The whole process is simple and compact, the bottom sediments are treated, and the building sand and the sludge with low water content are obtained simultaneously.

Description

A kind of system that is applicable to the comprehensive treating process of city inland river bed mud

Technical field

The invention belongs to field of environment protection, relate to a kind of system that is applicable to the comprehensive treating process of city inland river bed mud.

Background technology

China's rapid economy development has been brought immense pressure to resource and environment; Particularly the environmental problem of water body such as rivers and lakes receives everybody attention day by day; And the bed mud in the water body is handled; Then, need conducting a research of multi-layer multi-angle because it relates to many-sided problems such as cleaning, mummification, utilization.When in the river course mire, carrying out the processing of bed mud at present, common method has the mud of grabbing to combine mummification, and this kind mode corresponding requirements is lower, but engineering construction need take a large amount of land resourcess, and easily soil is caused secondary pollution; Another kind method is inhaled the combination mummification of dredging for strand, and this kind processing mode is the land occupation resource not, and processing efficiency is high, and comprehensive cost is low.Developed village difficult to understand formula bed mud continuously dehydrating system like Japan, adopted shaft type water extracter and strand suction ship to be connected mutually and carried out successive desilting dewatering operation.China utilizes dredger to carry out the bed mud dredging in south; The dredging and the mummification of mud have been realized in conjunction with the enveloping field; But the city inland river in the north is because the river course is narrow; Simultaneously city inland river adjoins resident living, suitablely build the enveloping field and carry out the mummification of bed mud, thereby should develop total system can realize handling bed mud efficiently and dredge after surplus water.

Summary of the invention

The present invention provides a kind of system that is applicable to the comprehensive treating process of city inland river bed mud, solves the problem of narrow city river inconvenience desilting, realizes desilting, desanding, sludge dewatering, deodorizing four unifications.

A kind of system that is applicable to the comprehensive treating process of city inland river bed mud is made up of strand sucking pump 1, settling pit 2, sludge sump 3, clean water basin 4, flocculation basin 5, transition section 6, settling tank 7, solidifying agent preparation jar 8, e Foerderanlage 9, sludge dehydration device 10, deodorization device 11.Shown in accompanying drawing, the muddy water of city river pumps into settling pit 2 through strand sucking pump 1, can reclaim as building sand through gained sand behind the sand setting; The muddy water on upper strata then gets into flocculation basin 5, realizes the removal of suspended particulate in the sewage at this through adding flocculation agent (can be SEPIGEL 305, Poly aluminum Chloride (PAC) or other suitable flocculation agents); Muddy water gets into settling tank 7 subsequently through transition section 6, and the suspended substance in this muddy water is deposited in the bottom; And the throw out in 5,6,7 is sent to sludge sump 3 after collecting; The upper strata clear water can be used as clear water and is transported to clean water basin 4 owing to reached emission standard through handling, and the clear water in the clean water basin can be considered as the wash-down water that the greening water effluxed or be used as follow-up sludge dewatering; Mud in the sludge sump is delivered to sludge dehydration device 10 through e Foerderanlage 9; Utilize the clear water that comes in the clean water basin 4 to be mixed into suitable concentration at solidifying agent preparation jar 8 with the dewatering agent that adds, squeeze into sludge dehydration device 10 subsequently, sludge dehydration device is the belt water extracter; Through the mud after the sludge dehydration device 10; Its water ratio can reach 40%-60%, and the resource utilization application is carried out in outward transport as mud cake, and the foul smell that in dehydration, produces is carried out removal through odor removal 11; The filter cloth of belt water extracter then washes through the clear water that clean water basin come, and finally enters in the river course.

Strand sucking pump 1 is made up of reamer and excavating pump, utilizes reamer can the bed mud that be deposited on the river bed be twisted to cut, stirs and make that the soil is porous, and bed mud can effectively be sucked into bed mud on the bank through excavating pump at the back.Consider the needs of follow-up resource utilization, if contain the more needs of sand in the bed mud settling pit is set, if to contain sand seldom promptly be deposition property river then settling pit need be set, handle through sand setting, the sand of gained can be used as building sand; The muddy water on upper strata is delivered to flocculation basin through sump pump; In this pond, add the sedimentation that an amount of flocculation agent is accelerated suspended particulate in the water; Water outlet flows into settling tank and further precipitates; Flocculation basin and settling tank bottom is provided with the mud transport unit sedimentary mud is delivered to the sludge dewatering equipment of rear end, and the top of settling tank then is the water outlet after handling, and this water outlet can be carried out the greening water; Perhaps be delivered to follow-up technology and further use, the foul smell that produces during the course absorbs to the foul smell treatment unit to be handled; Whole technology compact has realized the processing of bed mud, has obtained the mud of building sand and low-water-content simultaneously, can carry out resource utilization and use, and also removes to foul smell simultaneously, and reaction efficiency is high, and is little to the productive life influence.This invention is applicable to narrow city river, can realize desilting, desanding, sludge dewatering, de-odorised purpose.And the mud cake that obtains can be carried out building materials, compost or Conversion of energy according to its character, and the clear water of gained both can be used as the water of system, also can be used as the greening landscape water or is disposed to the river course as ecological water supplement.

Description of drawings

Fig. 1 is the process flow sheet of system of the present invention

1 is the strand sucking pump, and 2 is settling pit, and 3 is sludge sump, and 4 is clean water basin, and 5 is flocculation basin, and 6 is transition section, and 7 is settling tank, and 8 are solidifying agent preparation jar, and 9 is e Foerderanlage, and 10 is sludge dehydration device, and 11 is deodorization device.

Embodiment

Embodiment 1

If the sand content on ground of living in is bigger, then bed mud pumps into settling pit 2 through strand sucking pump 1, reclaims as building sand through sand behind the sand setting; Muddy water behind the sand setting gets into flocculation basin, adds the flocculation agent SEPIGEL 305 at this, through flocculation reaction; Can realize effective removal of suspended substance in the muddy water, the muddy water in the flocculation basin flows through transition section, imports settling tank; In settling tank, realize mud-water separation, the clear water on upper strata can be used as follow-up application, the then outer sludge sump of transporting to of the mud of flocculation basin, transition section and settling tank bottom; Be transported to sludge dehydration device then; The clear water of using settling tank adds in the sludge dehydration device with the solidifying agent that the solidifying agent dissolving obtains suitable concn, finally obtains water ratio and is 55% mud cake and transport outward, and the foul smell that in dehydration, produces is handled by odor removal.

Embodiment 2

If handled quantity of sand and mud is less, then can not pass through settling pit, bed mud directly gets into flocculation basin after twisting sucking pump; In flocculation basin, realize the removal of suspended particulate through adding flocculation agent; The clear water of handling the upper strata, back through settling tank can qualified discharge, and the mud of flocculation basin, settling tank and transition section is delivered to sludge dehydration device outward, and the water ratio of the mud cake of gained is 15%; Recycling is carried out in the mud cake outward transport, through deodorization device the foul smell in the reaction process is disposed.

Claims

1. a system that is applicable to the comprehensive treating process of city inland river bed mud is characterized in that being made up of strand sucking pump (1), settling pit (2), sludge sump (3), clean water basin (4), flocculation basin (5), transition section (6), settling tank (7), solidifying agent preparation jar (8), e Foerderanlage (9), sludge dehydration device (10), deodorization device (11); The muddy water of city river pumps into settling pit (2) through strand sucking pump (1); Reclaim as building sand through gained sand behind the sand setting; The muddy water on upper strata then gets into flocculation basin (5), in flocculation basin (5), realizes the removal of suspended particulate in the sewage through adding flocculation agent, and muddy water is subsequently through transition section (6); Get into settling tank (7); Suspended substance in the settling tank (7) in the muddy water is deposited in the bottom, and the deposition in the flocculation basin (5), transition section (6), settling tank (7) is sent to sludge sump (3) after collecting, and the upper strata gets clear water owing to reached emission standard through handling; Be transported to clean water basin (4) as clear water; Clear water in the clean water basin effluxes as the greening water or as the wash-down water of follow-up sludge dewatering, the mud in the sludge sump is delivered to sludge dehydration device (10) through e Foerderanlage (9), utilizes the clear water that comes in the clean water basin (4) to be mixed into suitable concentration at solidifying agent preparation jar (8) dewatering agent that adds that neutralizes; Squeeze into sludge dehydration device (10) subsequently; Reach 40%-60% through sludge dehydration device (10) moisture percentage in sewage sludge afterwards, the resource utilization application is carried out in outward transport as mud cake, and the foul smell that in dehydration, produces is carried out removal through odor removal (11).

2. a kind of system that is applicable to the comprehensive treating process of city inland river bed mud as claimed in claim 1 is characterized in that sludge dehydration device is the belt water extracter, and the filter cloth of belt water extracter then washes through the clear water that clean water basin come, and finally enters in the river course.

3. a kind of system that is applicable to the comprehensive treating process of city inland river bed mud as claimed in claim 1; It is characterized in that the strand sucking pump of selecting is made up of reamer and excavating pump; Reamer can cut the bed mud strand that is deposited on the river bed, stir and make that the soil is porous, and bed mud effectively is sucked into bed mud on the bank through the excavating pump of back.

4. like claim 1 system that is applicable to the comprehensive treating process of city inland river bed mud, it is characterized in that the flocculation agent that flocculation basin adopts is SEPIGEL 305 or Poly aluminum Chloride (PAC).