CN106495427A - The continuous drying system of MVR superheated steam sludge and method of work - Google Patents
The continuous drying system of MVR superheated steam sludge and method of work Download PDFInfo
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- CN106495427A CN106495427A CN201611152109.2A CN201611152109A CN106495427A CN 106495427 A CN106495427 A CN 106495427A CN 201611152109 A CN201611152109 A CN 201611152109A CN 106495427 A CN106495427 A CN 106495427A
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/063—Underpressure, vacuum
-
- 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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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
A kind of continuous drying system of MVR superheated steams sludge and method of work, belong to the energy with fields such as power.It is characterized in that：Compared with traditional sludge drying system, the system adopts exsiccator（3）, using superheated steam（31）With sludge direct heat transfer to be dried, and by control valve open and close, the first feed arrangement is made（1）, the first preheater（2）With the second feed arrangement（20）, the second preheater（21）, the first storage mud tank（11）With the second storage mud tank（22）Alternation, realizes exsiccator（3）Interior negative pressure seriality operation；The system under subnormal ambient, using the higher superheated steam of wettability power（31）For dried medium, drying sludge speed is greatly improved；Meanwhile, the system only consumes a small amount of compressor（7）And blower fan（10）Power consumption, by heat exchanger（9）Major part has been reclaimed from sludge（30）In the latent heat of vapor that is evaporated, be a kind of energy-efficient drying method for sludge.
Description
Technical field
The present invention relates to a kind of continuous drying system of MVR superheated steams sludge and method of work, are belonged to the energy and are led with power
Domain.
Background technology
More than 40,000,000,000 tons, annual discharge sludge is about 550～6,000,000 tons to China's year wastewater emission amount at present, and not
Disconnected increase.Estimate that the year two thousand twenty, the yield of China's sludge will reach 8000t/a, and with big city and megalopolis
The development in region, China's Treatment of Sludge are most moved towards to dry or burn such tertiary treatment at last.It is solution to reduce moisture percentage in sewage sludge
Certainly the key of many problems at present encountered in sludge handling process, is that sludge carries out resource (agricultural, burning etc.) place
The premise of reason treatment and use.
Conventional drying sludge is that hot-air is contacted with sludge with hot-air as dried medium, takes away the moisture in sludge.
The wettability power of hot-air is not strong, and when therefore using hot-air as dried medium, dried medium flow is very big, and drying time
Very long, less efficient.
Using superheated steam come instead of air as dried medium, compared to hot-air, the wettability power of superheated steam compared with
By force, meanwhile, superheated steam is environmentally friendly, dry run non-oxidation or combustion reaction, and steam expands in decompressor and does
Work(, condensation of water are recovered energy, and reduce drying system energy consumption.But use superheated steam as dried medium, work as drying
When system is still within normal pressure, dry temperature must so limit making for superheat steam drying system more than 100 DEG C
With.
Compared with drying system under normal pressure, vacuum drying is that material is placed under condition of negative pressure, under condition of negative pressure, in material
Water and exsiccator dried medium there is pressure differential, the water in material easily can be evaporated compared under normal pressure, so as to accelerate
Dry speed, saves drying time.
In dry run, main heat is the latent heat required for for moisture evaporation, and it is dry to utilize MVR technology to reclaim
The latent heat consumed during dry is to reduce the most effective method of drying system energy consumption at this stage.
If superheated steam can be applied to vacuum drying system as dried medium, and reduced using MVR technology whole
A kind of energy consumption of system, it is provided that vacuum drying method of efficient energy-saving, not only increases dry speed, also reduces drying
Energy consumption.
Content of the invention
The invention discloses a kind of energy consumption is low, the continuous drying system of MVR superheated steams sludge of efficiency high and method of work.
The system includes the first feed arrangement, the first preheater, exsiccator, cyclone separator, aeration tower, water pump, compression
Machine, Water Tank, heat exchanger, blower fan, the first storage mud tank, solidifying water pot, vacuum pump, the first valve, the second valve, the 3rd valve, the
Four valves, the 5th valve, the 6th valve, the second feed arrangement, the second preheater, the second storage mud tank, the 7th valve, the 8th valve
Door, the 9th valve, the tenth valve, the 11st valve, the 12nd valve, the 13rd valve；Above-mentioned first feed arrangement includes dirt
Mud entrance, sludge outlet, vacuum orifice；Second feed arrangement includes sludge inlet, sludge outlet, vacuum orifice；Exsiccator bag
Include steam inlet, steam (vapor) outlet, sludge inlet and sludge outlet；Cyclone separator includes entrance, gaseous phase outlet and sludge outlet；
Aeration tower includes gas access, waterway inlet, gas outlet and outlet of sewer；Heat exchanger include hot-side inlet, hot junction outlet, cold
End entrance and cold side outlet；Above-mentioned first feed arrangement bottom surface is connected by mechanical connection manner with the first preheater top surface
Connect；Second feed arrangement bottom surface is attached by mechanical connection manner with the second preheater top surface；Sludge to be dried is by the
One valve is connected with the first feed arrangement sludge inlet, dirt of the first feed arrangement sludge outlet by the 3rd valve and exsiccator
Mud entrance is connected, and vacuum pump is connected with the first feed arrangement vacuum orifice by the second valve；Sludge to be dried passes through the 7th valve
Door is connected with the second feed arrangement sludge inlet, and sludge of the second feed arrangement sludge outlet by the 9th valve with exsiccator enters
Mouth is connected, and vacuum pump is by the 8th valve and the second feed arrangement）Vacuum orifice is connected；Exsiccator steam (vapor) outlet and cyclonic separation
The entrance of device is connected, and the gaseous phase outlet of cyclone separator is connected with the gas access of aeration tower, and aeration tower gas outlet is divided into two
Road：Connect heat exchanger cold-side inlet all the way, heat exchanger cold side outlet is connected with exsiccator steam inlet by blower fan；Another a-road-through
Overcompression machine is connected with exchanger heat end entrance, and exchanger heat brings out mouth and is divided into two-way：Lead up to the 4th valve pre- with first
Hot device entrance is connected, and the outlet of the first preheater is connected with solidifying water pot entrance；Separately lead up to the tenth valve to enter with the second preheater
Mouth is connected, and the outlet of the second preheater is connected with solidifying water pot entrance, and vacuum pump is by the 13rd valve and solidifying water pot vacuum orifice phase
Even；The sludge outlet of exsiccator is divided into two-way after being connected with the sludge outlet of cyclone separator：Lead up to the 5th valve and
One storage mud tank entrance is connected, and the first storage mud tank outlet discharges sludge by the 6th valve；Ten one valve and are separately led up to
Two storage mud tank entrances are connected, and the second storage mud tank outlet discharges sludge by the 12nd valve；The outlet of sewer and sewage of aeration tower
Tank is connected, and water pump connects aeration tower waterway inlet.
According to a kind of continuous drying system of MVR superheated steams sludge of the present invention and method of work, it is characterised in that
Including procedure below：Be first shut off the first valve, the 7th valve, the 6th valve, the 12nd valve, open the second valve, the 3rd
Valve, the 4th valve, the 5th valve, the 8th valve, the 9th valve, the tenth valve, the 11st valve, the 13rd valve, utilize
Vacuum pump carries out evacuation, makes exsiccator be in negative pressure working condition；Be then shut off the second valve, the 3rd valve, the 4th valve,
5th valve, the 8th valve, the 9th valve, the tenth valve, the 11st valve）, the 13rd valve, open the first valve, the 7th
Valve, sludge to be dried enter the first feed arrangement and the second feed arrangement, close the first valve, the 7th valve, open the
Two valves, the 8th valve, carry out evacuation using vacuum pump;Be then shut off the second valve, the 8th valve, open the 3rd valve,
4th valve, the 5th valve, are dried process to the sludge in the first feed arrangement；When the sludge in the first feed arrangement is done
After the completion of dry, the 3rd valve, the 4th valve is closed, open the 9th valve, the tenth valve, the sludge in the second feed arrangement is entered
Row dried, opens the first valve during drying, sludge to be dried enters the first feed arrangement, is then shut off the first valve,
The second valve is opened, evacuation is carried out using vacuum pump, be then shut off the second valve；Treat drying sludge mistake in the second feed arrangement
After journey terminates, the 3rd valve, the 4th valve is opened, starts to be dried the sludge in the first feed arrangement, so alternately transported
OK, realize that sludge negative pressure seriality is dried；The above-mentioned sludge in the first feed arrangement is dried process and the second charging dress
Sludge in putting is withering to be comprised the following steps that：Sludge enters exsiccator after corresponding preheater pre-heating temperature elevation, dirty
In mud, moisture out enters cyclone separator from the steam (vapor) outlet of exsiccator after absorbing heat under negative pressure state and evaporating, and blending water is steamed
A small amount of sludge in vapour is separated, and subsequently into aeration tower, the water of exit of pump is further cleaned to sludge, gas washing
Tower outlet of sewer sewage out enters Water Tank, and the high vapor of cleannes is divided into two-way：Fraction vapor passes through all the way
Compressor compresses, become the superheated steam of High Temperature High Pressure, preheat and treat after the hot junction heat release for entering heat exchanger in the first preheater
Dry sludge, enters solidifying water pot after condensation；After the most vapor in another road enters the cold end heat absorption of heat exchanger (9), warp
Exsiccator is entered after blower fan pressurization and dries sludge；The dried sludge of exsiccator is mixed with the sludge that cyclone separator is separated
After enter the first storage mud tank.After the first storage mud is canned full, opens the 11st valve, close the 5th valve, the second storage mud tank is opened
Beginning work, then opens the 6th valve and outwells sludge, two storage mud tank alternations.
During being dried, the superheat steam flow for entering compressor is equal to evaporation in exsiccator to the drying system
Water flow, and the flow on another road is exactly the flow for entering dry steam in exsiccator, when dry rate is constant, this two-way
The flow of superheated steam keeps constant.
According to a kind of continuous drying system of MVR superheated steams sludge of the present invention and method of work, with uniform pressure
Under the conditions of the medium that is air-dried compare, system that employs the higher vapor of wettability power as dried medium, exsiccator
Interior negative-pressure operation improves the concentration difference of free surface moisture in sludge, so as to greatly improve drying sludge speed；And pass through control valve
Open and close, makes different feeds device alternation, realizes the seriality of negative pressure drying process；Most superheated steam is always
The circulation of participation system, only reclaims the latent heat of the part vapor being evaporated from sludge in heat exchanger, so as to
While recovery dries heat energy, the wasted work of compressor is substantially reduced.
Description of the drawings
Fig. 1 is that the present invention proposes a kind of continuous drying system of MVR superheated steams sludge；
Label title in figure：1st, the first feed arrangement, the 2, first preheater, 3, exsiccator, 4, cyclone separator, 5, aeration tower,
6th, water pump, 7, compressor, 8, Water Tank, 9, heat exchanger, 10, blower fan, the 11, first storage mud tank, 12, solidifying water pot, 13, vacuum pump,
14th, the first valve, the 15, second valve, the 16, the 3rd valve, the 17, the 4th valve, the 18, the 5th valve, the 19, the 6th valve, 20,
Two feed arrangements, the 21, second preheater, the 22, second storage mud tank, the 23, the 7th valve, the 24, the 8th valve, the 25, the 9th valve,
26th, the tenth valve, the 27, the 11st valve, the 28, the 12nd valve, the 29, the 13rd valve, 30, sludge, 31, superheated steam, 32,
Water, 33, sewage.
Specific embodiment
Referring to the course of work that Fig. 1 illustrates a kind of continuous drying system of MVR superheated steams sludge.
Be first shut off the first valve 14, the 7th valve 23, the 6th valve 19, the 12nd valve 28, open the second valve 15,
3rd valve 16, the 4th valve 17, the 5th valve 18, the 8th valve 24, the 9th valve 25, the tenth valve 26, the 11st valve
27th, the 13rd valve 29, carries out evacuation using vacuum pump 13, makes exsiccator be in negative pressure working condition.
It is then shut off the second valve 15, the 3rd valve 16, the 4th valve 17, the 5th valve 18, the 8th valve 24, the 9th valve
The 25, the tenth valve 26 of door, the 11st valve 27, the 13rd valve 29, open the first valve 14, the 7th valve 23, to be dried
Sludge 30 enters the first feed arrangement 1 and the second feed arrangement 20, closes the first valve 14, the 7th valve 23, opens the second valve
The 15, the 8th valve 24 of door, carries out evacuation using vacuum pump 13, is then shut off the second valve 15, the 8th valve 24, opens the 3rd
Valve 16, the 4th valve 17, the 5th valve 18, sludge enters exsiccator 3, water in sludge after 2 pre-heating temperature elevation of the first preheater
Divide and cyclone separator 4 is out entered from the steam (vapor) outlet of exsiccator 3 after heat absorption evaporation under negative pressure state, will blend in water vapour
A small amount of sludge separate, subsequently into aeration tower 5, the water 32 of the outlet of water pump 6 is further cleaned to sludge, gas washing
5 outlet of sewer of tower sewage 33 out enters Water Tank 8, and the high vapor of cleannes is divided into two-way：Fraction vapor all the way
Compressed by compressor 7, become the superheated steam of High Temperature High Pressure, after the hot junction heat release of entrance heat exchanger 9 in the first preheater 2
Preheating sludge to be dried, enters solidifying water pot 12 after condensation；The most vapor in another road enters the cold end heat absorption of heat exchanger 9
Afterwards, exsiccator 3 is entered after the pressurization of blower fan 10 dry sludge.
The sludge that 3 dried sludge of exsiccator is separated with cyclone separator 4 enters the first storage mud tank 11 after mixing.
After the first storage mud tank 11 is filled, open the 11st valve 27, close the 5th valve 18, the second storage mud tank 22 is started working, so
Open the 6th valve 19 afterwards to outwell sludge, two storage mud tank alternations.
After the completion of drying sludge in first feed arrangement 1, the 3rd valve 16, the 4th valve 17 is closed, open the 9th valve
The 25, the tenth valve 26 of door, starts to be dried the sludge in the second feed arrangement 20, opens the first valve 14 during drying,
Sludge to be dried 30 enters the first feed arrangement, is then shut off the first valve 14, opens the second valve 15, is entered using vacuum pump 13
Row evacuation, is then shut off the second valve 15, after drying sludge process terminates in the second feed arrangement 20, opens the 3rd valve
16th, the 4th valve 17, starts to be dried the sludge in the first feed arrangement 1, such alternate run, realizes that sludge negative pressure connects
Continuous property is dried；In system work process, the steam flow entered in exsiccator 3 simultaneously should be kept constant, so as to allow system stability
It is continued for.
Claims (2)
1. a kind of continuous drying system of MVR superheated steams sludge and method of work, it is characterised in that：
The system includes the first feed arrangement（1）, the first preheater（2）, exsiccator（3）, cyclone separator（4）, aeration tower
（5）, water pump（6）, compressor（7）, Water Tank（8）, heat exchanger（9）, blower fan（10）, first storage mud tank（11）, solidifying water pot（12）、
Vacuum pump（13）, the first valve（14）, the second valve（15）, the 3rd valve（16）, the 4th valve（17）, the 5th valve（18）、
6th valve（19）, the second feed arrangement（20）, the second preheater（21）, second storage mud tank（22）, the 7th valve（23）, the 8th
Valve（24）, the 9th valve（25）, the tenth valve（26）, the 11st valve（27）, the 12nd valve（28）, the 13rd valve
（29）；
Above-mentioned first feed arrangement（1）Including sludge inlet, sludge outlet, vacuum orifice；
Second feed arrangement（20）Including sludge inlet, sludge outlet, vacuum orifice；
Exsiccator（3）Including steam inlet, steam (vapor) outlet, sludge inlet and sludge outlet；
Cyclone separator（4）Including entrance, gaseous phase outlet and sludge outlet；
Aeration tower（5）Including gas access, waterway inlet, gas outlet and outlet of sewer；
Heat exchanger（9）Including hot-side inlet, hot junction outlet, cold-side inlet and cold side outlet；
Above-mentioned first feed arrangement（1）Bottom surface and the first preheater（2）Top surface is attached by mechanical connection manner；Second enters
Material device（20）Bottom surface and the second preheater（21）Top surface is attached by mechanical connection manner；
Sludge to be dried（30）By the first valve（14）With the first feed arrangement（1）Sludge inlet is connected, the first feed arrangement
（1）Sludge outlet passes through the 3rd valve（16）With exsiccator（3）Sludge inlet be connected, vacuum pump（13）By the second valve
（15）With the first feed arrangement（1）Vacuum orifice is connected；
Sludge to be dried（30）By the 7th valve（23）With the second feed arrangement（20）Sludge inlet is connected, the second feed arrangement
（20）Sludge outlet passes through the 9th valve（25）With exsiccator（3）Sludge inlet be connected, vacuum pump（13）By the 8th valve
（24）With the second feed arrangement（20）Vacuum orifice is connected；
Exsiccator（3）Steam (vapor) outlet and cyclone separator（4）Entrance be connected, cyclone separator（4）Gaseous phase outlet and gas washing
Tower（5）Gas access be connected, aeration tower（5）Gas outlet is divided into two-way：Connect heat exchanger all the way（9）Cold-side inlet, heat exchange
Device（9）Cold side outlet passes through blower fan（10）With exsiccator（3）Steam inlet is connected；Compressor is separately led up to（7）With heat exchanger
（9）Hot-side inlet is connected, heat exchanger（9）Hot junction outlet is divided into two-way：Lead up to the 4th valve（17）With the first preheater（2）
Entrance is connected, the first preheater（2）Outlet and solidifying water pot（12）Entrance is connected；Tenth valve is separately led up to（26）Pre- with second
Hot device（21）Entrance is connected, the second preheater（21）Outlet and solidifying water pot（12）Entrance is connected, vacuum pump（13）By the 13rd
Valve（29）With solidifying water pot（12）Vacuum orifice is connected；
Exsiccator（3）Sludge outlet and cyclone separator（4）Sludge outlet be connected after be divided into two-way：Lead up to the 5th valve
Door（18）With the first storage mud tank（11）Entrance is connected, the first storage mud tank（11）Outlet passes through the 6th valve（19）Discharge sludge；Separately
Lead up to the 11st valve（27）With the second storage mud tank（22）Entrance is connected, the second storage mud tank（22）Outlet passes through the 12nd valve
Door（28）Discharge sludge；
Aeration tower（5）Outlet of sewer and Water Tank（8）It is connected, water pump（6）Connection aeration tower（5）Waterway inlet.
2. a kind of continuous drying system of MVR superheated steams sludge according to claim 1 and method of work, it is characterised in that
Including procedure below：
It is first shut off the first valve（14）, the 7th valve（23）, the 6th valve（19）, the 12nd valve（28）, open the second valve
Door（15）, the 3rd valve（16）, the 4th valve（17）, the 5th valve（18）, the 8th valve（24）, the 9th valve（25）, the tenth
Valve（26）, the 11st valve（27）, the 13rd valve（29）, using vacuum pump（13）Evacuation is carried out, exsiccator is made（3）Place
In negative pressure working condition；
It is then shut off the second valve（15）, the 3rd valve（16）, the 4th valve（17）, the 5th valve（18）, the 8th valve（24）、
9th valve（25）, the tenth valve（26）, the 11st valve（27）, the 13rd valve（29）, open the first valve（14）, the 7th
Valve（23）, sludge to be dried（30）Enter the first feed arrangement（1）With the second feed arrangement（20）, close the first valve
（14）, the 7th valve（23）, the second valve (15), the 8th valve (24) is opened, and evacuation is carried out using vacuum pump (13);
The second valve (15), the 8th valve (24) is then shut off, the 3rd valve (16), the 4th valve (17), the 5th valve is opened
(18) process is dried to the sludge in the first feed arrangement (1),；When the drying sludge in the first feed arrangement (1) is completed
Afterwards, the 3rd valve (16), the 4th valve (17) is closed, opens the 9th valve (25), the tenth valve (26), to the second feed arrangement
(20) sludge in is dried process, opens the first valve (14) during drying, and sludge (30) to be dried enter first and feed
Device, is then shut off the first valve (14), opens the second valve (15), carries out evacuation using vacuum pump (13), be then shut off
Second valve (15)；After drying sludge process terminates in the second feed arrangement (20), the 3rd valve (16), the 4th valve is opened
(17), start to be dried the sludge in the first feed arrangement (1), such alternate run, realize that sludge negative pressure seriality is done
Dry；
Sludge in above-mentioned (1) to the first feed arrangement is dried to process and does with the sludge in the second feed arrangement (20)
Dry process is comprised the following steps that：
Sludge enters exsiccator after corresponding preheater pre-heating temperature elevation（3）, after in sludge, moisture absorbs heat under negative pressure state and evaporates
Cyclone separator is out entered from the steam (vapor) outlet of exsiccator (3)（4）, a small amount of sludge in blending water vapour is separated,
Subsequently into the water that aeration tower (5), water pump (6) export（32）Sludge is further cleaned, aeration tower (5) outlet of sewer
Sewage out（33）Water Tank (8) is entered, the high vapor of cleannes is divided into two-way：Fraction vapor is by compression all the way
Machine（7）Compression, becomes the superheated steam of High Temperature High Pressure, pre- in the first preheater (2) after the hot junction heat release of entrance heat exchanger (9)
Heat sludge to be dried, enters solidifying water pot (12) after condensation；The most vapor in another road enters the cold end of heat exchanger (9) and inhales
After heat, exsiccator (3) is entered after blower fan (10) pressurization and dry sludge；
The sludge that the dried sludge of exsiccator (3) is separated with cyclone separator (4) enters the first storage mud tank after mixing
(11)；After the first storage mud tank (11) is filled, open the 11st valve (27), close the 5th valve (18), the second storage mud tank
(22) start working, then open the 6th valve (19) and sludge is outwelled, two storage mud tank alternations.
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Cited By (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107804955A (en) * | 2017-11-15 | 2018-03-16 | 苏州欧拉透平机械有限公司 | Energy-saving sludge drying process system |
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Application publication date: 20170315 |