CN109141066A - Tail gas clean-up and heat recovery system and method for Treatment of Sludge - Google Patents
Tail gas clean-up and heat recovery system and method for Treatment of Sludge Download PDFInfo
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- CN109141066A CN109141066A CN201710452211.2A CN201710452211A CN109141066A CN 109141066 A CN109141066 A CN 109141066A CN 201710452211 A CN201710452211 A CN 201710452211A CN 109141066 A CN109141066 A CN 109141066A
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- heat exchanger
- tail gas
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- 239000010802 sludge Substances 0.000 title claims abstract description 71
- 238000011084 recovery Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 140
- 238000012545 processing Methods 0.000 claims abstract description 37
- 238000012546 transfer Methods 0.000 claims abstract description 25
- 238000000746 purification Methods 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims description 31
- 238000004140 cleaning Methods 0.000 claims description 17
- 238000011144 upstream manufacturing Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 8
- 230000008676 import Effects 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000002608 ionic liquid Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 2
- 239000007789 gas Substances 0.000 description 193
- 239000012535 impurity Substances 0.000 description 17
- 230000008569 process Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000004064 recycling Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000013019 agitation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 241000486406 Trachea Species 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910001872 inorganic gas Inorganic materials 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
-
- 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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to the tail gas clean-ups and heat recovery system and method for Treatment of Sludge.The system includes: the first heat exchange flow path, including First Heat Exchanger and it is arranged in second heat exchanger and third heat exchanger in First Heat Exchanger downstream, first heat transferring medium recycles in the first heat exchange flow path, to heat the processing gas for being used for Treatment of Sludge in First Heat Exchanger；And second purification with heat exchange flow path, heat exchange case including accommodating second liquid heat transferring medium, tail gas after Treatment of Sludge is discharged into heat exchange case, it is cleaned by the second liquid heat transferring medium in heat exchange case and transfers heat to second liquid heat transferring medium to be cooled down, the second liquid heat transferring medium in the second heat exchanger and heat exchange case is in heat exchange relationship so that the heat transfer of second liquid heat transferring medium is to the first heat transferring medium in the second heat exchanger.The exhaust gas flow of heat exchange case is by third heat exchanger, for carrying out heat exchange with the first heat transferring medium for flowing through third heat exchanger.
Description
Technical field
The present invention relates to the tail gas clean-ups and heat recovery system and method for Treatment of Sludge, more particularly relate to dirt
The tail gas clean-up and heat recovery system and method for mud processing.
Background technique
With the continuous development of urbanization, the generated sewage quantity to be treated in industrial production and life gradually increases
Add, and as the byproduct after sewage treatment --- the quantum of output of sludge is also increasing.But relative to sewage, sludge
Processing seems more difficult.Currently, sludge drying processing is a kind of relatively effective method for sludge treatment.And relatively good desiccation
Processing usually can all use direct-type desiccation, and carry out recycling and reusing to the desiccation medium after desiccation.
Chinese invention patent CN201010101024.8 disclose a kind of latent heat exchange formula multi-phase change sludge drying method with
Equipment.This equipment is passed through steam to carry out desiccation to sludge after mainly dewatered sludge is sent into desiccation machine.Pass through
Constantly stirring keeps sludge sufficiently heated and evaporates moisture therein and achieve the purpose that desiccation.It is dry that sludge is received using latent heat blowback
Steam after change, and by thermal energy therein through steam generation facility generation low temperature water vapour and as supplement desiccation heat source, then use
In sludge drying, and will be using the filtered tail gas harmless emission of biofilter into atmospheric environment.The patent document is adopted
Device and method can carry out drying and other treatment to sludge by low temperature water vapour, and by latent heat friendship heat-exchange pump to being given birth to
At tail gas in steam heat carry out heat exchange, and the heat of recycling is re-used as to the heat source of sludge drying, to realize heat
Circulation.
A large amount of waste gas can be released during sludge heat drying, complicated component multiplicity, is various organic-inorganics
The mixture of gas endangers seriously human habitat if direct emission can cause serious secondary pollution to ambient enviroment,
And cause the loss of heat.
Therefore now with some vent gas treatment modes, such as biofiltration process, tail gas absorber, deduster etc., but at present
The processing functions such as effective vent gas treatment and recuperation of heat are all difficult to realize, the tail gas after many desiccation discharges after treatment,
And the heat that tail gas carries is not for recycling and reuse, to increase desiccation energy consumption cost.And even if there is recuperation of heat processing
Equipment, the often low efficiency of recuperation of heat, and the sludge impurity contained in tail gas can block heat recovery equipment and cause to corrode.
The equipment of either above-mentioned patent or the equipment of the prior art are although dirt can be realized by way of heat exchange
Tail gas heat quantity recycling and recycling after mud desiccation, but in mud drying process, the sludge impurity carried in tail gas can be blocked up
Equipment is filled in, the efficiency of recuperation of heat is influenced.
Therefore the system and method that tail gas clean-up and recuperation of heat are effectively carried out in mud drying process are required to.
Summary of the invention
To solve the above-mentioned problems, the invention proposes a kind of tail gas clean-up for Treatment of Sludge and heat recovery system and
Method.
According to an aspect of the present invention, a kind of tail gas clean-up and heat recovery system for Treatment of Sludge is provided, comprising:
First heat exchange flow path, the first heat exchange flow path include First Heat Exchanger and are arranged in First Heat Exchanger downstream
Second heat exchanger and third heat exchanger, the first heat transferring medium recycles in the first heat exchange flow path, in First Heat Exchanger
Middle heating is used for the processing gas of Treatment of Sludge；
Second purification and heat exchange flow path, second purification and heat exchange flow path include the heat for accommodating second liquid heat transferring medium
Commuting case, the tail gas after Treatment of Sludge are discharged into the heat exchange case, are cleaned by the second liquid heat transferring medium in heat exchange case
And the second liquid heat transferring medium is transferred heat to be cooled down, in second heat exchanger and the heat exchange case
Second liquid heat transferring medium is in heat exchange relationship so that the heat transfer of the second liquid heat transferring medium is changed to described second
First heat transferring medium in hot device；And
Wherein, the exhaust gas flow of the heat exchange case is by the third heat exchanger, for flow through third heat exchanger
First heat transferring medium carries out heat exchange.
Preferably, the tail gas clean-up and heat recovery system further include gas collecting apparatus, and the gas collecting apparatus is arranged described
Above heat exchange case, for collecting tail gas from the heat exchange case；
Preferably, the first heat exchange flow path includes being arranged in the compressor of First Heat Exchanger upstream and being arranged under First Heat Exchanger
Trip and the throttle valve in the second heat exchanger upstream, the compressor are used to compress first heat transferring medium, and will be compressed
First heat transferring medium is directed to the First Heat Exchanger, and first heat transferring medium heats the place in the First Heat Exchanger
Then process gases flows into second heat exchanger via the throttle valve.
Preferably, the air inlet pipeline upstream of heat exchange case is arranged in gas distributing device, for making the tail after Treatment of Sludge
Gas can be evenly into heat exchange case.
Preferably, the heat exchange case include be arranged in clear liquid import near the bottom of heat exchange case and waste liquid outlet with
And the turbid outlet on the top of heat exchange case is set；When needing to feed, second liquid heat transferring medium is drawn from clear liquid import
Enter heat exchange case；When the liquid level in heat exchange case reaches turbid outlet, second liquid heat transferring medium, which is just exported from turbid, to flow out；
When heat exchange case needs to clean, second liquid heat transferring medium is discharged from waste liquid outlet.
Preferably, the tail gas clean-up and heat recovery system further include third compressed gas flow path, the third compressed gas
Body flow path include be arranged in compressed gas entrance near heat exchange case bottom, control valve and be arranged in heat exchange case bottom it is attached
Close tracheae, the control valve are configured to that compressed gas is introduced tracheae via compressed gas entrance when needed, and by setting
Multiple small hole injections on tracheae are set into the second liquid heat transferring medium of heat exchange case, are then discharged together with tail gas.
Preferably, second heat exchanger is arranged in series in the upstream or downstream of the third heat exchanger.
Preferably, second heat exchanger is arranged in parallel with the third heat exchanger.
Preferably, the second liquid heat transferring medium is the one or more of water, cleaning solution and ionic liquid.
Preferably, second heat exchanger is placed in inside the heat exchange case, the tail gas in the heat exchange case
The heat exchange case is discharged into below liquid level.
Preferably, the processing gas is air.
Preferably, the processing gas is sent into mud drying device from the First Heat Exchanger by ventilation device.
According to an aspect of the present invention, a kind of tail gas clean-up and heat recovery method for Treatment of Sludge is provided, comprising:
First heat exchange flow path is provided, the first heat exchange flow routing heat exchange loop is constituted, including First Heat Exchanger and
It is arranged in second heat exchanger and third heat exchanger in First Heat Exchanger downstream, the first heat transferring medium is in the first heat exchange flow path
Middle circulation, to heat the processing gas for being used for Treatment of Sludge in First Heat Exchanger；And
The second purification and heat exchange flow path are provided, second purification includes accommodating second liquid heat transferring medium with heat exchange flow path
Heat exchange case, the tail gas after Treatment of Sludge is discharged into the heat exchange case, by the second liquid heat transferring medium in heat exchange case
It cleans and transfers heat to the second liquid heat transferring medium to be cooled down, second heat exchanger and the heat exchange case
In second liquid heat transferring medium be in heat exchange relationship so that the heat transfer of the second liquid heat transferring medium is to described the
First heat transferring medium in two heat exchangers；
The second liquid heat transferring medium is filled to the heat exchange case；
Start the first heat exchange flow path and second purification and heat exchange flow path, so that processing gas is described the
It is heated in one heat exchanger, is then delivered to mud drying device, and be entered from the tail gas that mud drying device is discharged
The heat exchange case so that the tail gas by the second liquid heat transferring medium cleaning and transfer heat to described
Two liquid heat transfer mediums are to be cooled down；And
Make the exhaust gas flow of the heat exchange case by the third heat exchanger, for flow through the first of third heat exchanger
Heat transferring medium carries out heat exchange.
Preferably, the method also includes:
Gas collecting apparatus is provided, the gas collecting apparatus is arranged above the heat exchange case, for collecting tail from the heat exchange case
Gas；And
The heat exchange case exhaust gas flow by the third heat exchanger before, make the tail gas of the heat exchange case by described
Gas collecting apparatus is collected.
Preferably, the first heat exchange flow path includes being arranged in the compressor of First Heat Exchanger upstream and being arranged in the first heat exchange
Device downstream and throttle valve in the second heat exchanger upstream, the compressor, and will compressions for compressing first heat transferring medium
The first heat transferring medium afterwards is directed to the First Heat Exchanger, and first heat transferring medium heats institute in the First Heat Exchanger
Processing gas is stated, then flows into second heat exchanger via the throttle valve.
Preferably, the method also includes: gas distributing device is arranged in the air inlet pipeline upstream of heat exchange case, is used for
Enable tail gas evenly into heat exchange case.
Preferably, the method also includes: provide third compressed gas flow path, the third compressed gas flow path include set
Set the compressed gas entrance near heat exchange case bottom and the tracheae near the bottom that heat exchange case is set, compressed gas warp
Tracheae is entered by compressed gas entrance, and is changed by the second liquid of the multiple small hole injections to the heat exchange case that are arranged on tracheae
In thermal medium, then it is discharged together with tail gas.
Preferably, second heat exchanger is arranged in series in the upstream or downstream of the third heat exchanger.
Preferably, second heat exchanger is arranged in parallel with the third heat exchanger.
The present invention is provided to the tail gas clean-up of Treatment of Sludge and heat recovery system and method, air enters from air inlet,
Compressor is first passed through, First Heat Exchanger is then flowed into.First Heat Exchanger heats air, and the air heated is pressurizeed by ventilation device
After be sent into mud drying device.In mud drying device, the air of heating participates in sludge drying processing as processing gas.Add
It after the air of heat becomes the tail gas with sludge impurity, is discharged from mud drying device, and distributes and fill via pipeline inflow gas
It sets.Tail gas collects in gas distributing device, and arranges in the second liquid heat transferring medium into heat exchange case by air inlet pipeline
It puts, to give the heat transfer in tail gas to second liquid heat transferring medium, realizes solution-air heat exchange, to realize in tail gas
Heat recuperation of heat.In this heat transfer process, exhaust temperature is lowered, and automatically flows up to second liquid heat exchange
It more than the liquid level of medium, is then collected by gas collecting apparatus.Tail gas after collection is entered third heat exchanger, with third heat exchanger
In the first heat exchange medium carry out heat exchange, be subsequently discharged in environment by the tail gas for purifying and cooling down or other processing
Device.
At the same time, the first heat exchange medium of compressor compresses, and compressed first heat exchange medium is discharged to
In one heat exchanger.In First Heat Exchanger, the first heat exchange medium discharges heat to the air for flowing through First Heat Exchanger and realizes
Heat exchange between first heat exchange medium and air.Then, the first heat exchange medium being condensed is come by throttle valve
Second heat exchanger and/or third heat exchanger.As noted above, the second liquid heat transferring medium in heat exchange case absorbs tail
Heat in gas causes its temperature to rise.Therefore, the first heat exchange medium can absorb second liquid in the second heat exchanger and change
Heat in thermal medium is evaporated, and realizes heat exchange between the two, to reduce the temperature of second liquid heat transferring medium
Degree.Therefore second liquid heat transferring medium in heat exchange case can continue to absorb the heat for being discharged into tail gas therein.By right
Tail gas heat quantity is transformed into second liquid heat transferring medium, then transfers thermal energy to the second heat exchanger by second liquid heat transferring medium, from
And realize the thermal energy conversion that multiphase becomes, greatly improve the transmission efficiency of thermal energy；Pass through tail gas, second liquid heat transferring medium and
The thermal energy of one heat transferring medium is converted, and heat can be sufficiently recycled, and heat loss is reduced, to reduce energy consumption.It can be with from above-mentioned process
Find out, process of the present invention is ingenious, by unique heat exchange method, can quickly and effectively realize recuperation of heat, make heating energy efficiency ratio
COP reaches 3.0 ~ 8.0, to improve desiccation speed, sludge drying effect is good.In addition, the present invention is situated between using second liquid heat exchange
Confrontation exhaust gas is cleaned, and is washed the sludge impurity in tail gas effectively, is better ensured that equipment life, prevent tail gas
Equipment is blocked or corroded in heat exchanging process, improves the efficiency of tail gas recuperation of heat.
The present invention one or more of has the following technical effects:
(1) after tail gas first passes through gas distributing device, and enter via air inlet pipeline the second liquid heat transferring medium of heat exchange case
Middle cleaning, meanwhile, second liquid heat transferring medium absorbs the thermal energy in tail gas, thermal effect conversion is realized, so as to prevent in sludge
Equipment is blocked and corroded in tail gas heat exchanging process, improves the efficiency of tail gas recuperation of heat.
(2) energy-saving effect is good, by tail gas clean-up processing system, realizes efficient recuperation of heat, improves the efficiency of sludge drying.
(3) in order to guarantee that heat exchange is more abundant, the present invention has additional third heat exchanger, so that the heat of gas and liquid turns
Tail gas after changing carries out heat conversion with the first heat transferring medium of third heat exchanger again, improves the efficiency of heat recovery.
(4) by being transformed into second liquid heat transferring medium to tail gas heat quantity, then thermal energy is passed by second liquid heat transferring medium
The second heat exchanger is passed, to realize the thermal energy conversion that multiphase becomes, greatly improves the transmission efficiency of thermal energy；Pass through tail gas,
The conversion of the thermal energy of two liquid heat transfer mediums and the first heat transferring medium, can sufficiently recycle heat, heat loss be reduced, to reduce energy
Consumption.
(5) process is simple, desiccation effect is good, can quickly and effectively realize recuperation of heat, improvement effect and speed.
(6) enter the second purification and the tail gas of heat exchange flow path carries out handling under closed environment simultaneously recuperation of heat, prevent
Foul smell generates, and prevents secondary pollution, very environmentally friendly.
Other exemplary embodiments of the invention are described in detail obviously from provided below.It should be understood that institute
It states the detailed description and specific examples and although discloses exemplary embodiment of the present invention, but be merely illustrative purpose without purport
It is limiting the scope of the invention.
Detailed description of the invention
At least one embodiment will be described in conjunction with the following drawings below, wherein identical appended drawing reference indicates identical
Element.
Fig. 1 is the schematic diagram of a preferred embodiment of tail gas clean-up according to the present invention and heat recovery system.
Fig. 2 is the schematic diagram of another preferred embodiment of tail gas clean-up according to the present invention and heat recovery system.
Fig. 3 is the schematic diagram of another preferred embodiment of tail gas clean-up according to the present invention and heat recovery system.
Appended drawing reference:
1 mud drying device
2 first heat exchange flow paths
3 second purifications and heat exchange flow path
4 ventilation devices
5 air inlets
6 gas collecting apparatus
21 compressors
22 First Heat Exchangers
23 throttle valves
24 second heat exchangers
25 third heat exchangers
31 heat exchange cases
311 clear liquid imports
312 control valves
313 waste liquid outlets
314 control valves
The outlet of 315 turbids
316 compressed gas entrances
317 tracheaes
318 control valves
32 gas distributing devices
321 air inlet pipelines
322 gas outlets
323 second liquid heat transferring mediums.
Specific embodiment
Illustrate below substantially exemplary only and is in no way intended to limit the present invention, its application or use.With reference to attached
Figure, Fig. 1 is the schematic diagram of a preferred embodiment of tail gas clean-up according to the present invention and heat recovery system.Fig. 2 is according to this
The schematic diagram of another preferred embodiment of the tail gas clean-up and heat recovery system of invention.Fig. 3 is that tail gas according to the present invention is net
Change the schematic diagram with another preferred embodiment of heat recovery system.
As shown in Figure 1, tail gas clean-up according to the present invention and heat recovery system include the first heat exchange flow path 2, described the
One heat exchange flow path 2 is made of heat exchange loop, including compressor 21, First Heat Exchanger 22, throttle valve 23 and is arranged in series
The second heat exchanger 23 in 22 downstream of First Heat Exchanger, the first heat transferring medium recycle in the first heat exchange flow path 2, with
Heating is used for the processing gas of Treatment of Sludge in First Heat Exchanger 22.The first heat exchange flow path 2 further includes third heat exchanger
25。
As shown in Figure 1, second heat exchanger 24 is arranged in series in the downstream of the third heat exchanger 25.However, institute
Stating the second heat exchanger 24 can also be arranged in series in the upstream of the third heat exchanger 25, as shown in Figure 2.In addition, described
Two heat exchangers 24 can also be arranged in parallel with the third heat exchanger 25, as shown in Figure 3.
First heat transferring medium recycles in the heat exchange loop.The compression of compressor 21 is in gaseous first heat transferring medium,
And the first heat transferring medium of compressed high temperature and pressure is arranged to First Heat Exchanger 22.First heat transferring medium is in First Heat Exchanger
Processing gas (such as from the external air) condensation flowed through from First Heat Exchanger 22 in 22, becomes liquid, handles gas
Therefore body is heated.
According to one embodiment of present invention, First Heat Exchanger 22 is equivalent to condenser.Condensed first heat transferring medium
Second heat exchanger 24 and/or third heat exchanger 25 are entered with the liquid form of low-temp low-pressure by throttle valve 23.It is changed second
In hot device 24 and/or third heat exchanger 25, the first heat transferring medium absorbs heat with heat exchange flow path 3 from the second purification and is steamed
Hair.Therefore, the second heat exchanger 24 and/or third heat exchanger 25 are equivalent to evaporator.The first heat transferring medium after evaporation is pressed
The sucking of contracting machine 21 is to carry out new compression circulation.First heat transferring medium for example can be R134a, R407c, R410a etc..This field
Technical staff it should be understood that First Heat Exchanger 22, the second heat exchanger 24 and third heat exchanger 25 can be it is any other
The heat exchanger of suitable type, is made without departing from the scope of the present invention.
Preferred embodiment in accordance with the present invention, processing gas firstly flow through compressor 21 before flowing through First Heat Exchanger 22,
It helps cooling compressor 21 and is therefore preheated, to improve the recovery efficiency of heat.
In one embodiment of the invention, the downstream of First Heat Exchanger 22 is arranged in sludge treatment equipment, for dirt
Mud is handled, and tail gas is discharged.A large amount of waste gas can be released during sludge heat drying, complicated component is various,
It is the mixture of various organic-inorganic gases, it is raw to the mankind if direct emission can cause serious secondary pollution to ambient enviroment
Environmental hazard living is serious, and due to having waste heat in tail gas, direct emission will cause thermal loss.In a reality of the invention
It applies in example, sludge treatment equipment is shown as mud drying device 1.It will be apparent to a skilled person that Treatment of Sludge fills
The sludge treatment equipment for being also possible to any other suitable type is set, is made without departing from the scope of the present invention.
Tail gas clean-up according to the present invention and heat recovery system further include the second purification and heat exchange flow path 3, and described second
Purification includes the heat exchange case 31 for accommodating second liquid heat transferring medium 323 with heat exchange flow path 3.Tail gas after Treatment of Sludge is arranged
Enter the heat exchange case 31, cleaned by the second liquid heat transferring medium 323 in heat exchange case 31 and transferred heat to and is described
Second liquid heat transferring medium 323 is to be cooled down.Second heat exchanger 24 is placed in inside the heat exchange case 31, and described second changes
Hot device 24 is in heat exchange relationship so that the second liquid exchanges heat with the second liquid heat transferring medium in the heat exchange case 31
The heat transfer of medium 323 is to first heat transferring medium in second heat exchanger 24.In heat exchange case 31, tail gas is not
Heat exchange is only directly carried out with second liquid heat transferring medium, but also directly carries out heat exchange with the second heat exchanger 24, and will be hot
Amount passes to the first heat transferring medium；Therefore, it is converted by the thermal energy of tail gas, second liquid heat transferring medium and the first heat transferring medium,
The heat in tail gas can be sufficiently recycled, heat loss is reduced, to reduce energy consumption.It certainly can be as needed in heat exchange case 31
Portion is provided with multiple second heat exchangers 24, and multiple second heat exchangers 24 can be serial or parallel connection arrangement, to improve the second liquid
The heat transfer of body heat transferring medium 323 gives the efficiency of the first heat transferring medium.Exist into the second purification and the tail gas of heat exchange flow path 3
It carries out handling simultaneously recuperation of heat under closed environment, prevents foul smell from generating, prevent secondary pollution, it is very environmentally friendly.
In one embodiment of the invention, second liquid heat transferring medium is water.But second liquid heat transferring medium is not
It is limited to water, other suitable liquid can be used as, such as cleaning solution, ionic liquid etc..
Tail gas is cleaned in heat exchange case 31 and transfers heat to second liquid heat transferring medium, therefore is cooled down.By
This realizes the purification of tail gas and the recycling of heat.Tail gas automatically rises in second liquid heat transferring medium after cooling
It more than the liquid level of second liquid heat transferring medium, and then is collected by gas collecting apparatus 6.
The second liquid heat transferring medium for obtaining heat from tail gas is transferred heat to again via the second heat exchanger 24 second
The first heat transferring medium flowed in heat exchanger 24 is to evaporate the first heat transferring medium.
Tail gas clean-up according to the present invention and heat recovery system further include gas collecting apparatus 6, and the gas collecting apparatus 6 is arranged in institute
31 top of heat exchange case is stated, for collecting the tail gas for having carried out heat exchange and cleaning from the heat exchange case 31.Tail gas is handed in heat
It changes in case 31 and transfers heat to second liquid heat transferring medium, to be cooled down.It is thus achieved that the recycling of heat.Tail gas is cooling down
Afterwards, the liquid level of second liquid heat transferring medium or more is automatically risen in second liquid heat transferring medium, and then by the gas collection
Device 6 is collected.What the gas collecting apparatus 6 was collected carried out heat exchange and the exhaust gas flow of cleaning passes through the third heat exchanger
25, for carrying out heat exchange with the first heat transferring medium for flowing through third heat exchanger 25.It certainly, can be as needed in heat exchange
Multiple third heat exchangers 25 are set above case 31, and multiple third heat exchangers 25 can be serial or parallel connection arrangement, and gas collecting apparatus 6 is received
The exhaust gas flow for having carried out heat exchange and cleaning of collection by carrying out heat exchange with the first heat transferring medium of the multiple heat exchanger,
To improve the efficiency of heat exchange.
The first heat transferring medium for flowing through the second heat exchanger 24 and/or third heat exchanger 25 is sufficiently heated up and is vaporized, and by
First Heat Exchanger 22 is led back to, with repetitive cycling process.
Preferred embodiment in accordance with the present invention, gas distributing device 32 are arranged on the air inlet pipeline 321 of heat exchange case 31
Trip, for enabling tail gas evenly into heat exchange case 31.Gas distributing device 32 by pipeline respectively with heat exchange case 31
Gas connection is formed with mud drying device 1.Particularly, the air inlet pipeline of gas distributing device 32 and heat exchange case 31 is connected
The liquid level of the 321 second liquid heat transferring mediums being inserted into heat exchange case 31 is hereinafter, the depth that air inlet pipeline 321 is inserted into is enough to protect
Demonstrate,prove the sufficient heat exchange between gas and liquid.According to the present invention, after tail gas first passes through gas distributing device 32, and via air inlet
It is cleaned in the second liquid heat transferring medium of the entrance heat exchange case 31 of pipeline 321, meanwhile, second liquid heat transferring medium absorbs in tail gas
Thermal energy, realize thermal effect conversion, so as to prevent in sludge tail gas heat exchanging process block and corrode equipment, improve tail
The efficiency of gas recuperation of heat.
Preferred embodiment in accordance with the present invention, the heat exchange case 31 include being arranged near the bottom of heat exchange case 31
Clear liquid import 311 and waste liquid outlet 313 and be arranged in heat exchange case 311 top turbid outlet 315.
The heat exchange case 31 further includes control valve 312 and control valve 314.Due to containing sludge impurity in tail gas, thus
During carrying out solution-air interaction in heat exchange case 31, the sludge impurity in tail gas is by second liquid heat transferring medium 323
Cleaning, and be trapped in second liquid heat transferring medium 323.In order to keep the cleaning of second liquid heat transferring medium 323 and guarantee heat
The efficiency of exchange can open control valve 312, and water is introduced heat exchange case from the clear liquid import 311 of the bottom of heat exchange case 31
31, when the liquid level in heat exchange case 31 reaches turbid outlet 315, second liquid heat transferring medium 323 is just from 315 stream of turbid outlet
Out.
As the sludge impurity in liquid is continuously increased, the liquid in heat exchange case 31 becomes muddy, and then influences to rear
The heat exchange and cleaning of the tail gas of entrance, and certain devices are also required to overhaul or replace.For this purpose, control valve 312 can be closed,
Stop water inlet, and opening control valve 314 is discharged liquid from the waste liquid outlet 313 of the bottom of heat exchange case 31, later, carries out anti-
To operation, again to 31 water storage of heat exchange case.
Preferred embodiment in accordance with the present invention, the tail gas clean-up and heat recovery system further include third flow of the compressed gas
Road, the third compressed gas flow path includes control valve 318, the compressed gas entrance that is arranged near 31 bottom of heat exchange case
316 and the tracheae 317 that is arranged near the bottom of heat exchange case 31.Compressed gas enters tracheae via compressed gas entrance 316
317, and through multiple small hole injections for being arranged on tracheae into the second liquid heat transferring medium of heat exchange case 31, then and tail
Gas enters gas collecting apparatus 6 or third heat exchanger 25 together.
If the sludge impurity savings of the bottom of heat exchange case 31 is excessive, the heat exchange effect of the second heat exchanger 24 is influenced
Rate can open control valve 318, keep compressed gas attached from the arrival setting of compressed gas entrance 316 bottom in heat exchange case 31
Close tracheae 317.Later, compressed gas passes through multiple apertures for being arranged on tracheae 317 and sprays, and by the bottom of heat exchange case 31
The sludge impurity agitation in portion is got up, to facilitate sludge impurity from 315 discharge of turbid outlet.Leave second liquid heat transferring medium
323 compressed gas is collected into the gas collecting apparatus 6 of 31 top of heat exchange case, and hot with the progress in gas collecting apparatus 6 therewith
The tail gas of exchange and cleaning enters third heat exchanger 25 together, is then discharged into environment via gas outlet 322 or other processing fill
It sets.
It is possible in accordance with a preferred embodiment of the present invention to be not provided with gas collecting apparatus 6, make the tail gas for having carried out heat exchange and cleaning
Directly by the third heat exchanger 25, for carrying out heat exchange with the first heat transferring medium for flowing through third heat exchanger 25.
Preferred embodiment in accordance with the present invention, the second heat exchanger 24 are placed directly in heat exchange case 31, are achieved in sufficiently
Heat exchange.
Preferred embodiment in accordance with the present invention, the processing gas are air.However, the processing gas is also possible to fit
Together in any other gas of the invention.
Preferred embodiment in accordance with the present invention, the processing gas are sent by ventilation device 4 from the First Heat Exchanger 22
Sludge treatment equipment.The ventilation device 4 is preferably blower device and/or blower unit.
Preferred embodiment in accordance with the present invention, the sludge treatment equipment are mud drying devices 1.However, the sludge
Processing unit is also possible to any other sludge treatment equipment.The exhaust gas of drying and other treatment, i.e. tail gas are completed, is filled from sludge drying
1 is set to be discharged in the second purification and heat exchange flow path 3.
When tail gas clean-up described above and heat recovery system are put into use, processing gas is derived from external environment
Air generally uses following operating procedure.
Firstly, the first heat exchange flow path of starting 2 and the second purification and heat exchange flow path 3.Control valve 312 is opened, by second
Liquid heat transfer medium 323, such as water inject in heat exchange case 31 from liquid-inlet 311.Under normal circumstances, second liquid changes
Thermal medium 323 will reach scheduled liquid level in heat exchange case 31.Then, control valve 312 is closed.
Air enters from air inlet 5, first flows through from compressor 21, then flows into First Heat Exchanger 22.First Heat Exchanger 22
Air is heated, and heat air by ventilation device 4(such as blower device and/or air-introduced machine) pressurization after be sent into sludge drying
Device 1.In mud drying device 1, the air of heating participates in sludge drying processing as processing gas.The air of heating becomes
After tail gas with sludge impurity, it is discharged from mud drying device 1, and via pipeline inflow gas distributor 32.Tail gas exists
Collect in gas distributing device 32, and is arranged in the second liquid heat transferring medium 323 into heat exchange case 31 by air inlet pipeline 321
It puts, so that the heat transfer in tail gas to second liquid heat transferring medium 323, is realized solution-air heat exchange, to realize to tail gas
In heat recuperation of heat.In this heat transfer process, exhaust temperature is lowered, and is automatically flowed up to second liquid and changed
It more than the liquid level of thermal medium 323, is then collected by gas collecting apparatus 6.The tail gas of collection is entered third heat exchanger 25, with third
The first heat exchange medium in heat exchanger 25 carries out heat exchange, be subsequently discharged in environment by the tail gas for purifying and cooling down or
Other processing units.
At the same time, compressor 21 compresses the first heat exchange medium, and compressed first heat exchange medium is discharged to
In First Heat Exchanger 22.In First Heat Exchanger 22, the first heat exchange medium discharges heat to the air for flowing through First Heat Exchanger 22
It measures and realizes the heat exchange between the first heat exchange medium and air.Then, the first heat exchange medium being condensed is by throttling
Valve 23 and come the second heat exchanger 24 and/or third heat exchanger 25.As noted above, the second liquid in heat exchange case 31
Heat transferring medium 323 absorbs the heat in tail gas, its temperature is caused to rise.Therefore, the first heat exchange medium is in the second heat exchanger
The heat that can be absorbed in second liquid heat transferring medium 323 in 24 is evaporated, and realizes heat exchange between the two, to drop
The low temperature of second liquid heat transferring medium 323.Therefore second liquid heat transferring medium 323 in heat exchange case 31 can continue to inhale
Receive the heat for being discharged into tail gas therein.By being transformed into second liquid heat transferring medium to tail gas heat quantity, then changed by second liquid
Thermal medium transfers thermal energy to the second heat exchanger, to realize the thermal energy conversion that multiphase becomes, greatly improves the transmitting effect of thermal energy
Rate；It is converted by the thermal energy of tail gas, second liquid heat transferring medium and the first heat transferring medium, can sufficiently recycle heat, reduce heat
Loss, to reduce energy consumption.
Due to containing sludge impurity in tail gas, thus in heat exchange case 31 during progress solution-air interaction, tail
Sludge impurity in gas is cleaned by second liquid heat transferring medium 323, and is trapped in second liquid heat transferring medium 323.
Then, in order to keep the cleaning of second liquid heat transferring medium 323, it can according to need and open control valve 312, by the
Two liquid heat transfer medium 323(such as water) from the clear liquid import 311 of the bottom of heat exchange case 31 introducing heat exchange case 31, when heat is handed over
When the liquid level changed in case 31 reaches turbid outlet 315, second liquid heat transferring medium 323 is just from 315 outflow of turbid outlet.Normal
In the case of, second liquid heat transferring medium 323 will reach scheduled liquid level in heat exchange case 31.Then, 312 quilt of control valve
It closes.
As the sludge impurity in liquid is continuously increased, the liquid in heat exchange case 31 becomes muddy, and then influences to rear
The heat exchange and cleaning of the tail gas of entrance, and certain devices are also required to overhaul or replace.For this purpose, control valve 312 can be closed,
Stop water inlet, and opening control valve 314 is discharged liquid from the waste liquid outlet 313 of the bottom of heat exchange case 31, later, carries out anti-
To operation, again to 31 water storage of heat exchange case.
If the sludge impurity savings of the bottom of heat exchange case 31 is excessive, the heat exchange effect of the second heat exchanger 24 is influenced
Rate can open control valve 318, keep compressed gas attached from the arrival setting of compressed gas entrance 316 bottom in heat exchange case 31
Close tracheae 317.Later, compressed gas passes through multiple apertures for being arranged on tracheae 317 and sprays, and by the bottom of heat exchange case 31
The sludge impurity agitation in portion is got up, to facilitate sludge impurity from 315 discharge of turbid outlet.The compressed gas for leaving liquid is received
Collect the gas collecting apparatus 6 of the top of heat exchange case 31, and therewith with the tail gas one for having carried out heat exchange and cleaning in gas collecting apparatus 6
It rises and enters third heat exchanger 25, be then discharged into environment or other processing units via gas outlet 322.
Certain preferred embodiments and its modification has been described in the present invention.Those skilled in the art illustrate in reading and understanding
It is contemplated that other modifications and variations after book.Thus, the present invention is not limited to as optimal mode for carrying out the present invention
Disclosed specific embodiment, the present invention will include all embodiments fallen within the scope of the claims.
Claims (20)
1. a kind of tail gas clean-up and heat recovery system for Treatment of Sludge, comprising:
First heat exchange flow path, the first heat exchange flow path include First Heat Exchanger and are arranged in First Heat Exchanger downstream
Second heat exchanger and third heat exchanger, the first heat transferring medium recycles in the first heat exchange flow path, in First Heat Exchanger
Middle heating is used for the processing gas of Treatment of Sludge；
Second purification and heat exchange flow path, second purification and heat exchange flow path include the heat for accommodating second liquid heat transferring medium
Commuting case, the tail gas after Treatment of Sludge are discharged into the heat exchange case, are cleaned by the second liquid heat transferring medium in heat exchange case
And the second liquid heat transferring medium is transferred heat to be cooled down, in second heat exchanger and the heat exchange case
Second liquid heat transferring medium is in heat exchange relationship so that the heat transfer of the second liquid heat transferring medium is changed to described second
First heat transferring medium in hot device；And
The air inlet pipeline upstream of heat exchange case is arranged in, for keeping the tail gas after Treatment of Sludge uniform in gas distributing device
Ground enters heat exchange case,
Wherein, the exhaust gas flow of the heat exchange case is by the third heat exchanger, for flow through third heat exchanger
First heat transferring medium carries out heat exchange.
2. tail gas clean-up according to claim 1 and heat recovery system further include gas collecting apparatus, the gas collecting apparatus setting
Above the heat exchange case, for collecting tail gas from the heat exchange case.
3. tail gas clean-up according to claim 1 or 2 and heat recovery system, wherein the first heat exchange flow routes heat exchange
Circuit is constituted, including being arranged in the compressor of First Heat Exchanger upstream and being arranged in First Heat Exchanger downstream and in the second heat exchanger
The throttle valve of upstream, the compressor are guided for compressing first heat transferring medium, and by compressed first heat transferring medium
To the First Heat Exchanger, first heat transferring medium heats the processing gas in the First Heat Exchanger, then via
The throttle valve flows into second heat exchanger.
4. tail gas clean-up according to claim 1 or 2 and heat recovery system, wherein the heat exchange case includes that setting exists
Clear liquid import and waste liquid outlet near the bottom of heat exchange case and be arranged in heat exchange case top turbid outlet.
5. tail gas clean-up according to claim 1 or 2 and heat recovery system further include third compressed gas flow path, described
Third compressed gas flow path includes that compressed gas entrance, control valve and setting near heat exchange case bottom is arranged in heat exchange
Tracheae near the bottom of case, the control valve are configured to that compressed gas is introduced gas via compressed gas entrance when needed
Pipe, and through multiple small hole injections for being arranged on tracheae into the second liquid heat transferring medium of heat exchange case, then and tail gas
It is discharged together.
6. tail gas clean-up according to claim 1 or 2 and heat recovery system, wherein second heat exchanger cloth in series
It sets in the upstream or downstream of the third heat exchanger.
7. tail gas clean-up according to claim 1 or 2 and heat recovery system, wherein second heat exchanger and described the
Three heat exchangers are arranged in parallel.
8. tail gas clean-up according to claim 1 or 2 and heat recovery system, wherein the second liquid heat transferring medium is
Water, cleaning solution and ionic liquid it is one or more.
9. tail gas clean-up according to claim 1 or 2 and heat recovery system, wherein second heat exchanger is placed in described
Inside heat exchange case.
10. tail gas clean-up according to claim 1 or 2 and heat recovery system, wherein the tail gas is in the heat exchange case
The heat exchange case is discharged into below inherent liquid level.
11. tail gas clean-up according to claim 10 and heat recovery system, wherein heat exchange case be provided with positioned at liquid level with
Under air inlet pipe.
12. tail gas clean-up according to claim 1 or 2 and heat recovery system, wherein the processing gas is air.
13. tail gas clean-up according to claim 1 or 2 and heat recovery system, wherein the processing gas is by ventilation device
Mud drying device is sent into from the First Heat Exchanger.
14. a kind of tail gas clean-up and heat recovery method for Treatment of Sludge, comprising:
The first heat exchange flow path is provided, the first heat exchange flow path includes First Heat Exchanger and is arranged under First Heat Exchanger
The second heat exchanger and third heat exchanger of trip, the first heat transferring medium recycles in the first heat exchange flow path, to change first
Heating is used for the processing gas of Treatment of Sludge in hot device；
The second purification and heat exchange flow path are provided, second purification includes accommodating second liquid heat transferring medium with heat exchange flow path
Heat exchange case, the tail gas after Treatment of Sludge is discharged into the heat exchange case, by the second liquid heat transferring medium in heat exchange case
It cleans and transfers heat to the second liquid heat transferring medium to be cooled down, second heat exchanger and the heat exchange case
In second liquid heat transferring medium be in heat exchange relationship so that the heat transfer of the second liquid heat transferring medium is to described the
First heat transferring medium in two heat exchangers；
The second liquid heat transferring medium is filled to the heat exchange case；
Start the first heat exchange flow path and second purification and heat exchange flow path, so that processing gas is described the
It is heated in one heat exchanger, is then delivered to mud drying device, and be entered from the tail gas that mud drying device is discharged
The heat exchange case so that the tail gas by the second liquid heat transferring medium cleaning and transfer heat to described
Two liquid heat transfer mediums are to be cooled down；And
Make the exhaust gas flow of the heat exchange case by the third heat exchanger, for flow through the first of third heat exchanger
Heat transferring medium carries out heat exchange.
15. tail gas clean-up according to claim 14 and heat recovery method, further includes:
Gas collecting apparatus is provided, the gas collecting apparatus is arranged above the heat exchange case, for collecting tail from the heat exchange case
Gas；And
The heat exchange case exhaust gas flow by the third heat exchanger before, make the tail gas of the heat exchange case by described
Gas collecting apparatus is collected.
16. tail gas clean-up according to claim 14 or 15 and heat recovery method, wherein the first heat exchange flow path includes cloth
Set First Heat Exchanger upstream compressor and be arranged in First Heat Exchanger downstream and throttle valve in the second heat exchanger upstream, institute
It states compressor and is directed to first heat exchange for compressing first heat transferring medium, and by compressed first heat transferring medium
Device, first heat transferring medium heat the processing gas in the First Heat Exchanger, then flow into via the throttle valve
Second heat exchanger.
17. tail gas clean-up according to claim 14 or 15 and heat recovery method, further includes: gas distributing device to be arranged
In the air inlet pipeline upstream of heat exchange case, for enabling tail gas evenly into heat exchange case.
18. tail gas clean-up according to claim 14 or 15 and heat recovery method, further includes: provide third flow of the compressed gas
Road, the third compressed gas flow path include the compressed gas entrance being arranged near heat exchange case bottom and are arranged in heat exchange
Tracheae near the bottom of case, compressed gas enter tracheae via compressed gas entrance, and multiple on tracheae by being arranged in
Small hole injection is then discharged together with tail gas into the second liquid heat transferring medium of heat exchange case.
19. tail gas clean-up according to claim 14 or 15 and heat recovery method, wherein second heat exchanger is in series
It is arranged in the upstream or downstream of the third heat exchanger.
20. tail gas clean-up according to claim 14 or 15 and heat recovery method, wherein second heat exchanger with it is described
Third heat exchanger is arranged in parallel.
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| CN201710452211.2A CN109141066B (en) | 2017-06-15 | 2017-06-15 | Tail gas purification and heat recovery system and method for sludge treatment |
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| CN201710452211.2A CN109141066B (en) | 2017-06-15 | 2017-06-15 | Tail gas purification and heat recovery system and method for sludge treatment |
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