CN107804955A - Energy-saving sludge drying process system - Google Patents
Energy-saving sludge drying process system Download PDFInfo
- Publication number
- CN107804955A CN107804955A CN201711127893.6A CN201711127893A CN107804955A CN 107804955 A CN107804955 A CN 107804955A CN 201711127893 A CN201711127893 A CN 201711127893A CN 107804955 A CN107804955 A CN 107804955A
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- China
- Prior art keywords
- evaporator
- sludge
- inlet valve
- compression machine
- valve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
-
- 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
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The present invention relates to a kind of energy-saving sludge drying process system, including the first evaporator, second evaporator and vapour compression machine, the vapour compression machine includes the first inlet valve, second inlet valve, first outlet valve and second outlet valve, first evaporator is sequentially connected the first inlet valve by pipeline, vapour compression machine and first outlet valve simultaneously form circulation loop, second evaporator is sequentially connected the second inlet valve by pipeline, vapour compression machine and second outlet valve simultaneously form circulation loop, first evaporator and the second evaporator are connected with sewage sludge feed device and sludge discharger respectively.The system solves the problems, such as that drying sludge energy consumption is big and the sludge water of complicated component causes secondary pollution to environment.
Description
Technical field
The present invention relates to Treatment of Sludge, and in particular to a kind of energy-saving sludge drying process system.
Background technology
Sludge caused by sewage disposal, its water content is very big, generally more than 80%.And sludge no matter fill, burn,
Compost is required to reduce water content, referred to as drying sludge.Current drying sludge, mostly using steam drying, often dry one
Ton sludge is, it is necessary to 400~500 kilograms of raw steam；Complicated additionally, due to mud component, part nuisance can overflow into steam
Air, cause secondary pollution.
The content of the invention
In order to overcome drawbacks described above, the present invention provides a kind of energy-saving sludge drying process system, and the system utilizes evaporation
Being used cooperatively for device and compressor, greatly reduces energy consumption, and the condensate evaporated to system carries out biochemical treatment, avoids to ring
Cause secondary pollution in border.
The present invention in order to solve its technical problem used by technical scheme be：
A kind of energy-saving sludge drying process system, including the first evaporator, the second evaporator and vapour compression machine, it is described
Vapour compression machine includes the first inlet valve, the second inlet valve, first outlet valve and second outlet valve, and first evaporator passes through
Pipeline is sequentially connected the first inlet valve, vapour compression machine and first outlet valve and forms circulation loop, and second evaporator leads to
Piping is sequentially connected the second inlet valve, vapour compression machine and second outlet valve and forms circulation loop, first evaporator
It is connected respectively with sewage sludge feed device and sludge discharger with the second evaporator.
Preferably, first evaporator and the second evaporator include inner cylinder and outer barrel respectively, the inner cylinder and outer barrel it
Between form chuck, the first inlet valve and the second inlet valve of the vapour compression machine are connected by pipeline with inner cylinder, described first
Outlet valve and second outlet valve are connected by pipeline with chuck, the sewage sludge feed device and sludge discharger by pipeline respectively with
Inner cylinder connects.
Preferably, the inner cylinder of first evaporator and the second evaporator connects an agitating device, the stirring dress respectively
Put including agitator, reductor and motor.
Preferably, the chuck of first evaporator and the second evaporator is connected by condensate outlet valve and biochemistry pool respectively
Connect.
Preferably, the chuck of first evaporator and the second evaporator is filled by fixed gas air bleeding valve and a purification respectively
Put connection.
Preferably, between the chuck and the first inlet valve of first evaporator and the chuck of the second evaporator and
Two inlet valves are respectively equipped with a mist eliminator.
The beneficial effects of the invention are as follows：
1st, the system includes the equipment such as compressor, the first evaporator, the second evaporator, is done in the closed state of low-temp low-pressure
Dry sludge, makes the energy consumption of drying sludge reduce, and the vapor evaporated in sludge is passed through into heat recovery, and life is returned to after being condensed
Change pond and carry out biochemical treatment, therefore the system solves that drying sludge energy consumption is big and the sludge water of complicated component causes to environment
The problem of secondary pollution；
2nd, two sets of evaporators are used in the system, in the first evaporator operation, the second evaporator can carry out discharging and
Fed operation, and when the sludge of the first evaporator is close to degree of drying, high-temperature steam can be switched to second by vapour compression machine
Evaporator, so as to be preheated to the sludge of the second evaporator, when the second evaporator reaches preheating temperature, vapour compression machine
Second inlet valve is opened, and switches to the second evaporator, the second evaporator is started to dry work, the first evaporator carry out discharging and
Operation is fed, so as to ensure that the continuity of system work, and the waste heat in a upper evaporator can be utilized to following
The evaporator of work is preheated, and reduces energy consumption；Whole system can be automatically controlled by PLC, and automaticity is high；
The 3rd, agitating device without dead angle is set in the first evaporator and the second evaporator in the system, in drying sludge mistake
It is stirred continuously in journey, so can uniformly receives the heat that the transmission of evaporator chuck comes, while increase sludge evaporation as far as possible
Area, improve drying efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
In figure：The evaporators of 10- first, 11- fixed gas air bleeding valves, 12- condensate outlet valves, 13- inner cylinders, 14- chucks, 15-
Outer barrel, the evaporators of 20- second, 30- vapour compression machines, the inlet valves of 31- first, the inlet valves of 32- second, 33- first outlet valves,
34- second outlet valves, 40- agitating devices, 50- sewage sludge feed devices, 60- sludge dischargers, 70- mist eliminators, 80- purifiers,
90- biochemistry pools.
Embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.
Embodiment：As shown in figure 1, the arrow in figure represents the flow direction of tube fluid, a kind of energy-saving sludge drying process
System, including the first evaporator 10, the second evaporator 20 and vapour compression machine 30, the vapour compression machine 30 include the first import
Valve 31, the second inlet valve 32, first outlet valve 33 and second outlet valve 34, first evaporator 10 are sequentially connected by pipeline
First inlet valve 31, vapour compression machine 30 and first outlet valve 33 simultaneously form circulation loop, and second evaporator 20 passes through pipe
Road is sequentially connected the second inlet valve 32, vapour compression machine 30 and second outlet valve 34 and forms circulation loop, first evaporation
The evaporator 20 of device 10 and second is connected with sewage sludge feed device 50 and sludge discharger 60 respectively.The first evaporator 10 in the present invention
It is connected respectively with vapour compression machine 30 with the second evaporator 20, the first evaporator 10 is identical with the structure of the second evaporator 20 and phase
Mutually independent, both alternate operation, by taking the first evaporator 10 as an example, the 13 built-in pending processing of inner cylinder of the first evaporator 10
Sludge, first vapour compression machine 30 extract fixed gas from inner cylinder 13 so that negative pressure are formed in the first evaporator, fixed gas passes through
The chuck 14 that the first evaporator is sent into after the pressure-raising of compressor heats to the sludge of inner cylinder, is made using negative pressure and heating steam
Obtain moisture in sludge to be evaporated, the vapor of the low-temp low-pressure of evaporation carries enthalpy by the pressure-raising of vapour compression machine 30, enters back into chuck
14 sludge transferred heat in evaporator, steam are condensed into liquid, and condensate liquid is discharged into biochemistry pool by pipeline and done further
Processing；Two sets of evaporators are used in the system, when the first evaporator 10 works, the second evaporator 20 can carry out discharging and
Feed operation, and when the sludge of the first evaporator is close to degree of drying, high-temperature steam can be switched to the by vapour compression machine 30
Two evaporators 20, so as to be preheated to the sludge of the second evaporator, when the second evaporator reaches preheating temperature, both vapor compression
Second inlet valve of machine is opened, and is switched to the second evaporator, is made the second evaporator start to dry work, the second evaporator is gone out
Material and charging operation, so as to ensure that the continuity of system work, whole system can be automatically controlled by PLC.
In the present embodiment, the evaporator 20 of the first evaporator 10 and second includes inner cylinder 13 and outer barrel 15, institute respectively
Formation chuck 14 between inner cylinder and outer barrel is stated, the first inlet valve 31 and the second inlet valve 32 of the vapour compression machine pass through pipeline
It is connected with inner cylinder 13, the first outlet valve 33 and second outlet valve 34 are connected by pipeline with chuck 14, the sewage sludge feed
Device 50 and sludge discharger 60 are connected with inner cylinder respectively by pipeline.First evaporator and the second evaporation structure are identical, all for
Jacket type evaporator, inner cylinder storage heated material (sludge), high temperature and high pressure steam flows in chuck, and to the dirt in inner cylinder
Mud is heated, two evaporators be respectively coupled agitating device 40, sewage sludge feed device 50, sludge discharger 60, mist eliminator 70,
Purifier 80 and biochemistry pool 90, whole system include two evaporators, two agitating devices, two sewage sludge feed devices, two
Individual sludge discharger, two mist eliminators and two purifiers, and the public vapour compression machine of two evaporators and a life
Change pond.The inner cylinder 13 of first evaporator and the second evaporator connects an agitating device 40 respectively, and the agitating device includes
Agitator, reductor and motor.Agitating device 40 without dead angle is set in the first and second evaporators in the system, in sludge
Agitator is stirred continuously the sludge in inner cylinder in drying process, so can uniformly receive the heat that the transmission of evaporator chuck comes
Amount, while increase sludge disengagement area, improve drying efficiency as far as possible.
As a further improvement on the present invention, the chuck 14 of first evaporator and the second evaporator passes through lime set respectively
Outlet valve 12 is connected with biochemistry pool 90.Thus it is ensured that the moisture in the sludge of complicated component is directly discharged into biochemistry pool.Steamed in sludge
The vapor of hair is condensed into condensate liquid and returned to biochemical treatment is carried out in biochemistry pool after heat recovery, therefore will not cause
Secondary pollution to environment.The chuck 14 of first evaporator and the second evaporator passes through fixed gas air bleeding valve 11 and one respectively
Purifier 80 connects.Fixed gas main component is air in the present system, it is also possible to including the C as caused by sludge2, methane
Deng when incoagulable gas is gathered in evaporator, being attached to evaporator inner wall, occupy certain space so that heat exchange area reduces；
Incoagulable gas forms thermal resistance between steam and inwall simultaneously so that and heat transfer efficiency reduces, and heat can not transmit in time, so as to
Efficiency is reduced, therefore is regularly emitted the fixed gas in chuck by fixed gas air bleeding valve, before discharge, is also connected with
One purifier 80, purifier can be carbon dioxide adsorption device etc. to remove the pollutant in fixed gas.Described first steams
Send out between the inlet valve 31 of chuck 14 and first of device and the inlet valve 32 of chuck 14 and second of the second evaporator is respectively equipped with one
Mist eliminator 70.The mist eliminator 70 can be that foam grabber is sieve-plate tower, for the foam of the vapor in sludge to be removed, quilt
Processing clean water steam enters compressor, is advantageous to the protection to compressor.It is provided with horizontal perforated panel (sieve by an inside
Plate) vertical void tower form, sieve plate can be that one piece or polylith are connected, and during operation, air-flow is from bottom to top by sieve plate
Water layer, froth bed can be formed on sieve plate when air-flow velocity controls within the specific limits, after air-flow is by this layer of froth bed,
Foam is captured, and gas is purified.
The operating process of the present invention：Step is following (whole system can be automatically controlled by PLC)：
Step 1：First evaporator 10 is fed by sewage sludge feed device 50 so that sludge enters the inner cylinder of the first evaporator
In 13, the first inlet valve 31 and first outlet valve 33 are then turned on, starts vapour compression machine 30；
Step 2：Vapour compression machine 30 by the first inlet valve extract the first evaporator inner cylinder in fixed gas (mainly into
It is divided into air) so that negative pressure is gradually formed in the first evaporator, fixed gas passes through first after vapour compression machine carries out pressure-raising
Outlet valve 33 enters in the chuck of the first evaporator to be heated to the sludge in inner cylinder, while opens agitating device 40 to sludge
Carry out comprehensive stirring；
Step 3：Negative pressure in first evaporator 10 is stepped up, the moist part evaporation in sludge, vapour compression machine 30
Vapor in compressed gas increases sharply and sludge is heated so that the temperature of sludge rises to the work temperature of setting
Degree, now sludge is dried rapidly, while opens condensate outlet valve 12, and condensed lime set is drained into biochemistry pool and handled, is not coagulated
Gas is periodically discharged into purifier 80 by fixed gas air bleeding valve 11, is discharged after purified treatment；
Step 4：Second evaporator 20 is fed by sewage sludge feed device 50 so that sludge enters the inner cylinder of the second evaporator
In 13, when the sludge in the first evaporator is close to dry require, second outlet valve 34 is opened, the high temperature of vapour compression machine is steamed
Vapour is sent into the chuck of the second evaporator, and the sludge in the second evaporator is preheated, simultaneously closes off first outlet valve 33,
Be advantageous to the cooling of sludge while sludge in the first evaporator is further dried；
Step 5：After the sludge in the first evaporator reaches dry requirement, the second inlet valve 32 is opened, closes first
Inlet valve 31, formally the sludge in the second evaporator is dried, while opens the sludge discharger of the first evaporator connection
60, discharging operations are carried out to the first evaporator；It is reciprocal with this.
The system energy-conserving and environment-protective situation illustrates：
Such as certain sewage treatment plant is conventionally handled, it is necessary to by the drying sludge of water content 80% to 40%：Often
The life steam consumption 400kg of ton sludge, local steam price are 200 yuan/ton, and ton drying sludge operating cost is 80 yuan,
Discharge 400kg sludge steam, working environment very severe simultaneously：
Using present system, the energy consumption for drying cost of ton sludge is 40kW, contains vapour compression machine and agitator
Total energy consumption, adjust during according to 0.7 yuan/kWh of average electricity price, be 28 yuan.Ton drying sludge can save 52 yuan of energy consumption cost, save
Energy consumption 65%.The steam being evaporated simultaneously send biochemistry pool to carry out biochemical treatment after being condensed in enclosed environment, avoid secondary
Pollution.
It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, may be used also
To make several modifications and improvements, these belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with
Appended claims are defined.
Claims (6)
- A kind of 1. energy-saving sludge drying process system, it is characterised in that：Including the first evaporator (10), the second evaporator (20) With vapour compression machine (30), the vapour compression machine (30) includes the first inlet valve (31), the second inlet valve (32), first outlet Valve (33) and second outlet valve (34), first evaporator (10) are sequentially connected the first inlet valve (31), steam by pipeline Compressor (30) and first outlet valve (33) simultaneously form circulation loop, and second evaporator (20) is sequentially connected by pipeline Two inlet valves (32), vapour compression machine (30) and second outlet valve (34) simultaneously form circulation loop, first evaporator (10) It is connected respectively with sewage sludge feed device (50) and sludge discharger (60) with the second evaporator (20).
- 2. energy-saving sludge drying process system according to claim 1, it is characterised in that：First evaporator (10) Include inner cylinder (13) and outer barrel (15) respectively with the second evaporator (20), chuck (14), institute are formed between the inner cylinder and outer barrel The first inlet valve (31) and the second inlet valve (32) for stating vapour compression machine are connected by pipeline with inner cylinder (13), and described first goes out Mouth valve (33) and second outlet valve (34) are connected by pipeline with chuck (14), the sewage sludge feed device (50) and sludge discharger (60) it is connected respectively with inner cylinder by pipeline.
- 3. energy-saving sludge drying process system according to claim 2, it is characterised in that：First evaporator and The inner cylinder (13) of two evaporators connects an agitating device (40) respectively, and the agitating device includes agitator, reductor and motor.
- 4. energy-saving sludge drying process system according to claim 2, it is characterised in that：First evaporator and The chuck (14) of two evaporators is connected by condensate outlet valve (12) with biochemistry pool (90) respectively.
- 5. energy-saving sludge drying process system according to claim 2, it is characterised in that：First evaporator and The chuck (14) of two evaporators is connected by fixed gas air bleeding valve (11) with a purifier (80) respectively.
- 6. energy-saving sludge drying process system according to claim 2, it is characterised in that：The folder of first evaporator Between set (14) and the first inlet valve (31) and the chuck (14) of the second evaporator is respectively equipped with one with the second inlet valve (32) Mist eliminator (70).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711127893.6A CN107804955A (en) | 2017-11-15 | 2017-11-15 | Energy-saving sludge drying process system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711127893.6A CN107804955A (en) | 2017-11-15 | 2017-11-15 | Energy-saving sludge drying process system |
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| Publication Number | Publication Date |
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| CN107804955A true CN107804955A (en) | 2018-03-16 |
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| CN201711127893.6A Pending CN107804955A (en) | 2017-11-15 | 2017-11-15 | Energy-saving sludge drying process system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104261648A (en) * | 2014-09-23 | 2015-01-07 | 山东大学 | Activated sludge sterilizing and steam mechanical compression drying method and system |
| CN204803204U (en) * | 2015-05-14 | 2015-11-25 | 何伟才 | System for sludge drying handles |
| CN105417919A (en) * | 2015-11-12 | 2016-03-23 | 上海环境卫生工程设计院有限公司 | Sludge indirect heat drying system and drying process thereof |
| CN106495427A (en) * | 2016-12-14 | 2017-03-15 | 南京航空航天大学 | The continuous drying system of MVR superheated steam sludge and method of work |
| CN207632688U (en) * | 2017-11-15 | 2018-07-20 | 苏州欧拉透平机械有限公司 | Energy-saving sludge is dried system |
-
2017
- 2017-11-15 CN CN201711127893.6A patent/CN107804955A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104261648A (en) * | 2014-09-23 | 2015-01-07 | 山东大学 | Activated sludge sterilizing and steam mechanical compression drying method and system |
| CN204803204U (en) * | 2015-05-14 | 2015-11-25 | 何伟才 | System for sludge drying handles |
| CN105417919A (en) * | 2015-11-12 | 2016-03-23 | 上海环境卫生工程设计院有限公司 | Sludge indirect heat drying system and drying process thereof |
| CN106495427A (en) * | 2016-12-14 | 2017-03-15 | 南京航空航天大学 | The continuous drying system of MVR superheated steam sludge and method of work |
| CN207632688U (en) * | 2017-11-15 | 2018-07-20 | 苏州欧拉透平机械有限公司 | Energy-saving sludge is dried system |
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