CN106746438A - A kind of Treatment of Sludge heat-exchange system - Google Patents
A kind of Treatment of Sludge heat-exchange system Download PDFInfo
- Publication number
- CN106746438A CN106746438A CN201710137093.6A CN201710137093A CN106746438A CN 106746438 A CN106746438 A CN 106746438A CN 201710137093 A CN201710137093 A CN 201710137093A CN 106746438 A CN106746438 A CN 106746438A
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- Prior art keywords
- heat exchanger
- sludge
- water
- cooling water
- cooling
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- 239000010802 sludge Substances 0.000 title claims abstract description 46
- 239000000498 cooling water Substances 0.000 claims abstract description 61
- 238000001816 cooling Methods 0.000 claims abstract description 25
- 239000002351 wastewater Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000029087 digestion Effects 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 17
- 230000008676 import Effects 0.000 claims abstract description 11
- 239000008234 soft water Substances 0.000 claims abstract description 8
- 239000002826 coolant Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 238000000605 extraction Methods 0.000 claims description 5
- 238000004781 supercooling Methods 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 4
- 230000009466 transformation Effects 0.000 abstract description 4
- 238000002407 reforming Methods 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of Treatment of Sludge heat-exchange system, including heat exchanger, secondary heat exchanger, cooling water heat exchanger, cooling pond and a wastewater disposal basin；Import for heat exchanger is the sludge input after pyrohydrolysis, and an outlet for heat exchanger will send into the import of connected secondary heat exchanger by the sludge after this grade of heat exchanger；The sludge that anaerobic digestion process design temperature is reduced to by temperature after this grade of heat exchanger is sent to the digester being attached thereto for the outlet of secondary heat exchanger；Cooling water for heat exchanger is soft water, is utilized by cooling water heat exchanger Posterior circle；The cooling water inlet end connection cooling pond of secondary heat exchanger, coolant outlet connection wastewater disposal basin；The wastewater disposal basin connects second pond.The present invention can solve compatible after the upgrading of existing Sludge treatment system of sewage treatment plant transformation Zhong Ni areas hot systems, realize at utmost using technical problems such as the low cost reforming mode of existing equipment and stable operations.
Description
Technical field
The present invention relates to a kind of sewage disposal technology.
Background technology
Because pyrohydrolysis is complete set of equipments, associated technical parameters are provided by equipment vendors, but how heat existing with water factory is
System matches, still in exploration.Although some scholars indicate that sludge can use two-stage heat exchange mode, but not to digester temperature
Degree precise control proposes specific method, does not also propose associativity of the two-stage heat exchange facilities with genuine area heat-exchange apparatus and utilization
Property, meanwhile, do not hand over for the cooling water source of heat exchange and whereabouts, belong to localized design, do not carry out hot system from overall
The arrangement of system and upgrading.Hot systems in pyrohydrolysis-anaerobic digestion process, mainly heat supply and heat-exchange system, directly determine
Entire work flow success is implemented, and is also related to whether later stage operation is sustainable, is the core link that whole design considers.Hot water
The transformation of solution is carried out based on anaerobic digestion process, and in the anaerobic digestion facility of Treatment of Sludge, has had corresponding heat exchanger,
According to the mode of newly-built new purchase, it is tantamount to significantly increase cost of investment, also result in the waste of existing equipment, is badly in need of phase
Pass technology and method, enable the compatibility existed system of the hot systems after upgrading, and reduces cost realizes stable operation.
The content of the invention
It is an object of the invention to provide a kind of Treatment of Sludge heat-exchange system, to solve existing sludge of sewage treatment plant processing system
It is compatible after the upgrading of system transformation Zhong Ni areas hot systems, realize the low cost reforming mode and stabilization at utmost using existing equipment
The technical problems such as operation.
In order to realize foregoing invention purpose, the present invention uses technical scheme as follows：
A kind of Treatment of Sludge heat-exchange system, including heat exchanger, secondary heat exchanger, cooling water heat exchanger, a cooling pond
And wastewater disposal basin；Import for heat exchanger is the sludge input after pyrohydrolysis, and an outlet for heat exchanger will be changed by this level
Temperature drop is the dirt of the 65%-75% of mud extraction temperature and anaerobic digestion process design temperature difference after pyrohydrolysis is processed after hot device
Mud sends into the import of connected secondary heat exchanger；The outlet of secondary heat exchanger will be reduced to by temperature after this grade of heat exchanger
The sludge of anaerobic digestion process design temperature is sent to the digester being attached thereto；Cooling water for heat exchanger into and out of end with it is cold
But the side heat exchange import and export connection of water- to-water heat exchanger, a cooling water for heat exchanger is soft water, by cooling water heat exchanger
Posterior circle is utilized；The opposite side cooling water inlet end of cooling water heat exchanger is connected with cooling pond, coolant outlet end with it is useless
Pond connects；The cooling water inlet end connection cooling pond of secondary heat exchanger, coolant outlet connection wastewater disposal basin；The wastewater disposal basin
Connection second pond, the cooling pond is supplied water using running water, recycled water or treated secondary clarifier effluent.
A kind of described Treatment of Sludge heat-exchange system, cooling pond and wastewater disposal basin are arranged in cooling water pump house, wastewater disposal basin
Water outlet is through water resource heat pump using remaining thermal source or discharge second pond.
A kind of described Treatment of Sludge heat-exchange system, secondary heat exchanger is arranged in digester.
A kind of described Treatment of Sludge heat-exchange system, heat exchanger, a secondary heat exchanger use casing type heat exchanging
Device, cooling water heat exchanger is plate type heat exchanger.
A kind of described Treatment of Sludge heat-exchange system, the water of cooling pond is to go out by the second pond after rotary drum grid treatment
Water.
Advantages of the present invention and good effect：
1., using the original digester of plant area, in the temperature stress that digester can bear, sludge passes through to exchange heat twice, i.e., and one
Secondary heat exchanger, secondary heat exchanger are cooled down to pyrohydrolysis sludge, the reaction temperature needed for accurately reaching anaerobic digestion, are realized
Optimal anaerobic digestion effect after the transformation of mud area；
2. high temperature sludge after pyrohydrolysis, temperature is 45-55 DEG C after once exchanging heat, and can meet on-site long distance delivery
It is required that, occurrence temperature is not too low there is " wax " phenomenon that grease solidifies；
3. secondary heat exchanger is arranged in digester, can be completed within the shortest time in digester sludge temperature it is accurate
Regulation and control, make in digester in optimal digestion temperature；
4. enter water-filling hydrothermal exchange with cooling water heat exchanger and a heat exchanger, can obtain temperature heat exchange higher
Water, this heat-exchanging water can be used for the purposes such as the molten medicine of plant area, water distribution and heating, realize the comprehensive utilization of " heat " resource；
5. a heat exchanger cooling water is soft water, reduces the hardened phenomenon of heat exchanger to greatest extent in heat transfer process,
Realize the efficient heat exchange efficiency of muddy water；This closed loop sofe water is utilized simultaneously, can reduce soft water water, drops low water usage cost；
6. in mud area transforms, it is possible to use the equipment such as heat exchanger in former anaerobic digester system, not to present situation digester
Structure is modified；
7. the heat-exchanging water being not used by all heat-exchange systems is emitted into wastewater disposal basin, this heat-exchanging water have partial heat energy without
Utilize, can be needed with water resource heat pump using remaining thermal source with reference to plant area.
Brief description of the drawings
Fig. 1 is system theory of constitution block diagram of the invention.
Specific embodiment
Concrete composition of the invention and operation principle are shown in Figure 1.A kind of Treatment of Sludge heat-exchange system, including once change
Hot device, secondary heat exchanger, cooling water heat exchanger, cooling pond and wastewater disposal basin；Import for heat exchanger is the dirt after pyrohydrolysis
Mud input, an outlet for heat exchanger will by temperature drop after this grade of heat exchanger be pyrohydrolysis treatment after mud extraction temperature with detest
The sludge of the 65%-75% of oxygen digestion process design temperature difference sends into the import of connected secondary heat exchanger；It is secondary to change
Be sent to for the sludge that anaerobic digestion process design temperature is reduced to by temperature after this grade of heat exchanger and be attached thereto by the outlet of hot device
Digester；Cooling water for heat exchanger is connected into and out of end with the side heat exchange import and export of cooling water heat exchanger, and this one
The cooling water of secondary heat exchanger is soft water, is utilized by cooling water heat exchanger Posterior circle；The opposite side cooling of cooling water heat exchanger
Water inlet end is connected with cooling pond, and coolant outlet end is connected with wastewater disposal basin；The cooling water inlet end connection of secondary heat exchanger
Cooling pond, coolant outlet connection wastewater disposal basin；The wastewater disposal basin connects second pond, the cooling pond using running water, again
Unboiled water or treated secondary clarifier effluent supply water.
The course of work of the invention is as follows：Sludge process after pyrohydrolysis sequentially passes through heat exchanger, a secondary heat exchanger,
Into digester, a heat exchanger cooling water is utilized by cooling water heat exchanger Posterior circle.Sludge after pyrohydrolysis is through superheated water
Mud extraction temperature is 70-90 DEG C after solution treatment, and sludge is anaerobic digestion process design temperature, sludge by temperature after secondary heat exchanger
Temperature drop is the 65%- of mud extraction temperature and anaerobic digestion process design temperature difference after pyrohydrolysis treatment after a heat exchanger
75%.Such treatment had both ensured cooling demand, while high-temperature cooling water can be obtained beneficial to recycling, and increase anaerobism disappears simultaneously
Chemical industry skill temperature control accuracy.
Secondary heat exchanger is arranged in digester, using original heat exchanger or newly-built；Secondary heat exchanger cooling water comes from
Cooling pond, using running water, recycled water or treated secondary clarifier effluent, by being emitted into waste water after secondary heat exchanger
Pond.Cooling water heat exchanger can utilize original heat exchanger or newly-built, and cooling water heat exchanger cooling water comes from cooling pond, using originally
Water, recycled water or treated secondary clarifier effluent, by being emitted into wastewater disposal basin after cooling water heat exchanger.No. one time heat exchanger is cold
But water is soft water, after cooling water heat exchanger is lowered the temperature, returns to a heat exchanger, and closed cycle is utilized.Cooling pond and waste water
Pond is arranged in cooling water pump house, and wastewater disposal basin water outlet can be through water resource heat pump using remaining thermal source or discharge second pond.
In Fig. 1, the sludge temperature T1 after pyrohydrolysis is 86 DEG C；Sludge is 53 by the temperature T2 after a heat exchanger
℃；Sludge is 40 DEG C by the temperature T3 after secondary heat exchanger；The temperature T4 that cooling water I enters before cooling water heat exchanger is 25
℃；The temperature T5 that cooling water I enters before a heat exchanger is 32 DEG C；The temperature that cooling water II and cooling water III enters before heat exchanger
Degree T6 is 25 DEG C；Temperature T7s of the cooling water II from after secondary heat exchanger is 38 DEG C；Temperature of the cooling water III from after cooling water heat exchanger
Degree T8 is 52 DEG C.
Cooling water I：For No. one time between heat exchanger and cooling water heat exchanger, closed cycle, soft water；
Cooling water II：For secondary heat exchanger cooling；
Cooling water III：For cooling water heat exchanger cooling.
By taking certain sewage treatment plant's waterline upgrading as an example, because mud line can not meet process demand, need to be transformed simultaneously,
Core process uses pyrohydrolysis-anaerobic digestion, in the case where digester is not extended, meets Treatment of Sludge demand,
Reach Treatment of Sludge standard.137.5tDS/d before mud handling capacity is designed by transforming increases to 180tDS/d, using " concentration → pre-
Dehydration → pyrohydrolysis → anaerobic digestion → frame dehydration " technological process.To meet technological requirement, two are carried out to sludge after pyrohydrolysis
Secondary heat.
Sludge exchanges heat twice, is once completed in newly-built heat exchange workshop (hot sludge and cooling water I), secondary in digester
The pipe heat exchanger (hot sludge and cooling water II) of interior utilization present situation.Cooling water I exchanges heat complete (cold in heat exchange workshop again
But water I, cooling water III), design parameter as shown in appendix 1,1, newly-built heat exchange workshop, cooling water pump house 1, overall thermal altogether
Exchange process flow is with shown in Fig. 1.
Subordinate list 1：
Claims (5)
1. a kind of Treatment of Sludge heat-exchange system, it is characterised in that including heat exchanger, secondary heat exchanger, cooling water heat exchanger,
Cooling pond and wastewater disposal basin；Import for heat exchanger is the sludge input after pyrohydrolysis, and an outlet for heat exchanger will be through
Temperature drop is the 65%- of mud extraction temperature and anaerobic digestion process design temperature difference after pyrohydrolysis treatment after crossing this grade of heat exchanger
75% sludge sends into the import of connected secondary heat exchanger；The outlet of secondary heat exchanger will be by temperature after this grade of heat exchanger
The sludge that degree is reduced to anaerobic digestion process design temperature is sent to the digester being attached thereto；The cooling water of heat exchanger enters,
Go out end to be connected with the side heat exchange import and export of cooling water heat exchanger, a cooling water for heat exchanger is soft water, through supercooling
Water- to-water heat exchanger Posterior circle is utilized；The opposite side cooling water inlet end of cooling water heat exchanger is connected with cooling pond, and cooling water goes out
Mouth end is connected with wastewater disposal basin；The cooling water inlet end connection cooling pond of secondary heat exchanger, coolant outlet connection wastewater disposal basin；Institute
Wastewater disposal basin connection second pond is stated, the cooling pond is supplied water using running water, recycled water or treated secondary clarifier effluent.
2. a kind of Treatment of Sludge heat-exchange system according to claim 1, it is characterised in that cooling pond and wastewater disposal basin are set
In in cooling water pump house, wastewater disposal basin water outlet is through water resource heat pump using remaining thermal source or discharge second pond.
3. a kind of Treatment of Sludge heat-exchange system according to claim 1, it is characterised in that secondary heat exchanger is arranged at digestion
In pond.
4. a kind of Treatment of Sludge heat-exchange system according to claim 1 a, it is characterised in that heat exchanger, secondary
Heat exchanger uses double pipe heat exchanger, and cooling water heat exchanger is plate type heat exchanger.
5. a kind of Treatment of Sludge heat-exchange system according to claim 1, it is characterised in that the water of cooling pond is by turning
Secondary clarifier effluent after drum grid treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710137093.6A CN106746438A (en) | 2017-03-09 | 2017-03-09 | A kind of Treatment of Sludge heat-exchange system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710137093.6A CN106746438A (en) | 2017-03-09 | 2017-03-09 | A kind of Treatment of Sludge heat-exchange system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106746438A true CN106746438A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710137093.6A Pending CN106746438A (en) | 2017-03-09 | 2017-03-09 | A kind of Treatment of Sludge heat-exchange system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107473553A (en) * | 2017-09-08 | 2017-12-15 | 上海同济普兰德生物质能股份有限公司 | A kind of modularization pyrohydrolysis sludge cooling system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000140897A (en) * | 1998-11-04 | 2000-05-23 | Hitachi Zosen Corp | Sludge slurry treating device |
| CN105073656A (en) * | 2013-03-09 | 2015-11-18 | 维利亚水务解决方案及技术支持公司 | Energy efficient system and process for treating sludge |
| JP2015213881A (en) * | 2014-05-12 | 2015-12-03 | 三菱化工機株式会社 | Sludge digestion treatment system |
| CN205088082U (en) * | 2015-04-30 | 2016-03-16 | 北京皓天百能环保工程有限公司 | Sewage sludge treatment device |
| KR101695473B1 (en) * | 2016-07-19 | 2017-01-23 | 장우기계 주식회사 | Waste heat recovery of exhaust gas and dehumidification device |
| CN206616128U (en) * | 2017-03-09 | 2017-11-07 | 北京市市政工程设计研究总院有限公司 | A kind of Treatment of Sludge heat-exchange system |
-
2017
- 2017-03-09 CN CN201710137093.6A patent/CN106746438A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000140897A (en) * | 1998-11-04 | 2000-05-23 | Hitachi Zosen Corp | Sludge slurry treating device |
| CN105073656A (en) * | 2013-03-09 | 2015-11-18 | 维利亚水务解决方案及技术支持公司 | Energy efficient system and process for treating sludge |
| JP2015213881A (en) * | 2014-05-12 | 2015-12-03 | 三菱化工機株式会社 | Sludge digestion treatment system |
| CN205088082U (en) * | 2015-04-30 | 2016-03-16 | 北京皓天百能环保工程有限公司 | Sewage sludge treatment device |
| KR101695473B1 (en) * | 2016-07-19 | 2017-01-23 | 장우기계 주식회사 | Waste heat recovery of exhaust gas and dehumidification device |
| CN206616128U (en) * | 2017-03-09 | 2017-11-07 | 北京市市政工程设计研究总院有限公司 | A kind of Treatment of Sludge heat-exchange system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107473553A (en) * | 2017-09-08 | 2017-12-15 | 上海同济普兰德生物质能股份有限公司 | A kind of modularization pyrohydrolysis sludge cooling system |
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Application publication date: 20170531 |
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