CN109970311A - High-temperature steam suitable for coal-burning boiler fluidizes bed drying sludge co-combustion system and method - Google Patents
High-temperature steam suitable for coal-burning boiler fluidizes bed drying sludge co-combustion system and method Download PDFInfo
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- CN109970311A CN109970311A CN201910324617.1A CN201910324617A CN109970311A CN 109970311 A CN109970311 A CN 109970311A CN 201910324617 A CN201910324617 A CN 201910324617A CN 109970311 A CN109970311 A CN 109970311A
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- 239000010802 sludge Substances 0.000 title claims abstract description 124
- 238000001035 drying Methods 0.000 title claims abstract description 46
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title abstract description 13
- 239000008187 granular material Substances 0.000 claims abstract description 19
- 238000009826 distribution Methods 0.000 claims abstract description 6
- 238000005520 cutting process Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 238000010521 absorption reaction Methods 0.000 claims description 11
- 239000010801 sewage sludge Substances 0.000 claims description 10
- 230000002209 hydrophobic effect Effects 0.000 claims description 6
- 238000009841 combustion method Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 6
- 238000005243 fluidization Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002361 compost Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 108010034145 Helminth Proteins Proteins 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- -1 burning etc..Wherein Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 244000000013 helminth Species 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 210000004681 ovum Anatomy 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
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- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a kind of high-temperature steams suitable for coal-burning boiler to fluidize bed drying sludge co-combustion system and method, including sludge conveying system, rotary feeder, fluidized bed dryer, dewatered sludge transportation system and boiler；The outlet of sludge conveying system is connected through rotary feeder with the entrance of fluidized bed dryer, the outlet of fluidized bed dryer is connected through dewatered sludge transportation system with the entrance of boiler, the bottom of fluidized bed dryer is provided with air compartment and air distribution plate, First Heat Exchanger is provided in fluidized bed dryer, gas vent at the top of fluidized bed dryer is connected with the entrance of separator, the mud granule outlet of separator is connected through dewatered sludge transportation system with the entrance of boiler, the gas vent of separator is connected by blower with air compartment, the system and method can be realized the processing of sludge, and capacity usage ratio is high, tail gas is not generated simultaneously.
Description
Technical field
The invention belongs to boiler technology fields, are related to a kind of high-temperature steam fluidisation bed drying sludge suitable for coal-burning boiler
Co-combustion system and method.
Background technique
As Chinese society economic development, urbanization process quickening and national life level improve, city domestic sewage
Amount sharply increases.Sludge is the auxiliary product after sewage treatment plant's sewage treatment, is rich in organic detritus, microorganism, helminth
The harmful substances such as ovum and heavy metal.Property is very unstable when sludge without appropriately handling is stacked, and can give out foul odour, phase
Surface soil layer can also be penetrated by closing pollutant, lead to a variety of environmental hazards such as atmosphere, soil, water pollution.Therefore in processing sludge
Shi Bixu thoroughly handles its harmfulness, prevents pollution environment.
Traditional method for sludge treatment has sanitary landfills, compost, burning etc..Wherein, sludge incineration is the dirt of most " thorough "
Mud processing mode, in developed countries such as Europe, the U.S., Japan using more, minimizing degree height, energy fast with processing speed
The advantages that source recycles.
But moisture content is excessive in primary sludge, can not directly handle.The water content in sludge is reduced, is in Treatment of Sludge
An important ring.Most of sewage treatment plants, China only the thickened sludge of generation is carried out dehydrating, dewatered sludge it is aqueous
Rate still has 80% or so, is still difficult to reach the requirement of the subsequent processings such as landfill, compost or burning disposition, it is also necessary to further right
Sludge is dried, reduces moisture percentage in sewage sludge.
Drying sludge preconditioning technique is based on heated drying technology at present, including heated-air drying, superheat steam drying, heat pump
Dry, solar energy auxiliary drying, microwave drying technology etc., wherein Superheated Steam Drying Technology is due to simple and convenient, dry
The advantages that effect is good, stability and high efficiency, good safety is one of current main drying sludge technology, and is particularly suitable for fire coal
Power plant cooperates sewage treatment plant to carry out Treatment of Sludge, and the sludge after drying is directly burned into furnace, it can be achieved that sludge in coal-burning power plant
Harmlessness disposing.
Superheat steam drying system mostly uses cylindrical drier, superheated steam and wet mud to pass through between heat-conducting mode at present
Heat exchange is connect, although having many advantages, such as that structure is simple, adaptable, rate of drying is slower, and separate unit drying machine power output is smaller, dirty
Mud is easily bonded in heat conductive wall wall surface, causes rate of drying to reduce and influences drying effect.If by the way that the dried mediums such as hot wind are led to
Enter drying machine directly contacted with sludge, convective drying, drying efficiency, but system complex can be greatly improved, vent gas treatment amount is very big,
And sludge glue wall the problem of still have.
Efficient mass-and heat-transfer may be implemented in fluidized bed, also has correlative study in terms of drying sludge, generally uses hot cigarette
Gas or hot-air are fluidized, it is expected to and reach good drying efficiency, and avoids sludge from gluing wall, but capacity usage ratio is lower, and
And there are a large amount of tail gas to need to handle.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of high temperature suitable for coal-burning boiler is provided
Steam fluidized bed drying sludge co-combustion system and method, the system and method can be realized the processing of sludge, and capacity usage ratio
Height, while not generating tail gas.
In order to achieve the above objectives, the high-temperature steam fluidisation bed drying sludge of the present invention suitable for coal-burning boiler mixes burning
System includes sludge conveying system, rotary feeder, fluidized bed dryer, blower, dewatered sludge transportation system and boiler；
The outlet of sludge conveying system is connected through rotary feeder with the entrance of fluidized bed dryer, fluidized bed dryer
Outlet be connected through dewatered sludge transportation system with the entrance of boiler, the bottom of fluidized bed dryer is provided with air compartment and cloth wind
Plate is provided with First Heat Exchanger in fluidized bed dryer, the entrance phase of the gas vent at the top of fluidized bed dryer and separator
The sewage sludge powder outlet of connection, separator is connected through dewatered sludge transportation system with the entrance of boiler, the gas vent of separator
It is connected through blower with air compartment.
The outlet of sludge conveying system is through warehouse, rotary feeder and sludge transporting pipeline and fluidized bed dryer in sludge
Entrance be connected；
The outlet of fluidized bed dryer is connected through mud granule drainage conduit and dewatered sludge transportation system with the entrance of boiler.
Rotary cutting pitch cutting and the rotation for driving rotary cutting pitch cutting to rotate are provided with above fluidized bed dryer entrance
Rotating motor.
The inlet of fluidized bed dryer is provided with cutting net.
It further include steam turbine, wherein the outlet of steam turbine is connected with the entrance of First Heat Exchanger.
It further include water treatment system, condenser, low add-back thermal, the second heat exchanger and vapour compression machine；
The First Heat Exchanger includes compressed steam heat exchanger and the superheated vapor heat exchanger, wherein the gas of separator goes out
Mouth is connected with the entrance of the entrance of vapour compression machine and blower, and the outlet of blower is connected with the entrance of air compartment, both vapor compression
The outlet of machine is connected with the entrance of compressed steam heat exchanger, the outlet of compressed steam heat exchanger and the entrance of boiler and second changes
The heat release side entrance of hot device is connected, and the heat release side outlet of the second heat exchanger is connected with the entrance of water treatment system, and overheat is steamed
The entrance of vapour heat exchanger is connected with the outlet of steam turbine, the outlet and the outlet phase of low add-back thermal of the superheated vapor heat exchanger
Connection, the outlet of condenser are connected with the heat absorption side entrance of the second heat exchanger, and the heat absorption side outlet of the second heat exchanger adds with low
The entrance of regenerative apparatus is connected.
The outlet of compressed steam heat exchanger containing dirty hydrophobic delivery pipe with the heat release side entrance of the second heat exchanger through being connected.
The outlet of compressed steam heat exchanger is connected through on-condensible gas delivery pipe with the entrance of boiler.
It further include condenser, water treatment system, low add-back thermal and the second heat exchanger；
First Heat Exchanger is the superheated vapor heat exchanger, and the outlet of steam turbine is connected with the entrance of the superheated vapor heat exchanger,
The outlet of the superheated vapor heat exchanger is connected with the outlet of low add-back thermal, the gas vent of separator and the second heat exchanger
The entrance of heat release side entrance and blower is connected, and the heat release side outlet of the second heat exchanger is connected with the entrance of water treatment system,
The outlet of blower is connected with the entrance of air compartment, and the outlet of condenser is connected with the heat absorption side entrance of the second heat exchanger, and second
The heat absorption side outlet of heat exchanger is connected with the entrance of low add-back thermal, on-condensible gas and the dewatered sludge outlet of the second heat exchanger
It is connected with the entrance of boiler through on-condensible gas delivery pipe.
High-temperature steam fluidisation bed drying sludge co-combustion method of the present invention suitable for coal-burning boiler includes following step
It is rapid:
The sludge of sludge conveying system output is sent into fluidized bed dryer through rotary feeder and is dried, fluidized bed drying
The mud granule of device bottom discharge is sent into boiler through dewatered sludge transportation system carries out burning disposal, wherein passes through the first heat exchange
Device recycles the heat in fluidized bed dryer in mud granule air-flow, the gas of fluidized bed dryer top gas outlet discharge into
Enter and separated into separator, wherein the sewage sludge powder that separator is separated is sent into boiler through dewatered sludge transportation system
It is burned, the gas that separator is separated enters in air compartment through blower.
The invention has the following advantages:
High-temperature steam of the present invention suitable for coal-burning boiler fluidizes bed drying sludge co-combustion system and method is having
When gymnastics is made, the sludge of sludge conveying system output is sent into fluidized bed dryer through rotary feeder to be dried, fluidized bed
The mud granule of drier bottom discharge is sent into boiler through dewatered sludge transportation system carries out burning disposal, to realize the dry of sludge
Dry burning, in addition, the gas of fluidized bed dryer top gas outlet discharge is entered in separator and separated, wherein point
It is sent into boiler and is burned through dewatered sludge transportation system from the sewage sludge powder that device is separated, the gas that separator is separated
It enters in air compartment, it is subsequent to be burned again, to avoid the generation of tail gas, guarantee the harmless treatment of sludge, in addition, fluidisation
It is provided with First Heat Exchanger in bed dryer, the heat in fluidized bed dryer in mud granule air-flow is recycled by First Heat Exchanger
Amount, capacity usage ratio are higher.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment one；
Fig. 2 is the sectional view in the direction A-A in Fig. 1；
Fig. 3 is the structural schematic diagram of embodiment two.
Wherein, 1 it is sludge conveying system, 2 be warehouse in sludge, 3 be rotary feeder, 4 be sludge transporting pipeline, 5 is
Rotating electric machine, 6 be rotary cutting pitch cutting, 7 be the superheated vapor heat exchanger, 8 be separator, 9 be compressed steam heat exchanger, 10 be fluidisation
Bed dryer, 11 be air distribution plate, 12 be air compartment, 13 be mud granule drainage conduit, 14 be dewatered sludge transportation system, 15 be sludge powder
Last drainage conduit, 16 are boiler, 17 be vapour compression machine, 18 are blower, 19 to be that on-condensible gas conveys containing dirty hydrophobic delivery pipe, 20
Pipe, 21 be steam turbine, 22 be condenser, 23 be water treatment system, 24 be low add-back thermal, 25 be the second heat exchanger, 26 be
Cut net.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
High-temperature steam fluidisation bed drying sludge co-combustion system of the present invention suitable for coal-burning boiler includes that sludge is defeated
Send system 1, through blower 18, rotary feeder 3, fluidized bed dryer 10, dewatered sludge transportation system 14 and boiler 16；Sludge conveying
The outlet of system 1 is connected through rotary feeder 3 with the entrance of fluidized bed dryer 10, and the outlet of fluidized bed dryer 10 is through dry
Sludge conveying system 14 is connected with the entrance of boiler 16, and the bottom of fluidized bed dryer 10 is provided with air compartment 12 and air distribution plate
11, First Heat Exchanger, 10 gas vent at top of fluidized bed dryer and entering for separator 8 are provided in fluidized bed dryer 10
Mouth is connected, and the sewage sludge powder outlet of separator 8 is connected through dewatered sludge transportation system 14 with the entrance of boiler 16, separator 8
Gas vent be connected with air compartment 12 by blower 18.
The outlet of sludge conveying system 1 is dry through warehouse 2, rotary feeder 3 and sludge transporting pipeline 4 in sludge and fluidized bed
The entrance of dry device 10 is connected；The outlet of fluidized bed dryer 10 through mud granule drainage conduit 13 and dewatered sludge transportation system 14 with
The entrance of boiler 16 is connected.
Rotary cutting pitch cutting 6 is provided with above 10 entrance of fluidized bed dryer and for driving rotary cutting pitch cutting 6 to rotate
Rotating electric machine 5；The inlet of fluidized bed dryer 10 is provided with cutting net 26；The invention also includes steam turbine 21, wherein vapour
The outlet of turbine 21 is connected with the entrance of First Heat Exchanger.
High-temperature steam fluidisation bed drying sludge co-combustion method of the present invention suitable for coal-burning boiler includes following step
It is rapid:
The sludge that sludge conveying system 1 exports is sent into fluidized bed dryer 10 through rotary feeder 3 and is dried, fluidized bed
The mud granule of 10 bottom of drier discharge is sent into boiler 16 through dewatered sludge transportation system 14 carries out burning disposal, wherein logical
The heat in First Heat Exchanger recycling fluidized bed dryer 10 in mud granule air-flow is crossed, 10 top gas of fluidized bed dryer goes out
The gas of mouth discharge, which enters in separator 8, to be separated, wherein the sewage sludge powder that separator 8 is separated is defeated through dewatered sludge
It send system 14 to be sent into boiler 16 to be burned, the gas that separator 8 is separated enters in air compartment 12 through blower.
Sludge transporting pipeline 4 use bifurcation structure, can typically be divided into two, into the two sides of rotating electric machine 5, and into
The inlet setting cutting net 26 of fluidized bed drier 10, is further cut into fine strip shape for sludge, guarantees that sludge is fluidizing
Fluidisation and drying effect in bed dryer 10.
Embodiment one
Referring to Figure 1 and Figure 2, the present embodiment further includes water treatment system 23, condenser 22, low add-back thermal 24, second
Heat exchanger 25 and vapour compression machine 17；The First Heat Exchanger includes compressed steam heat exchanger 9 and the superheated vapor heat exchanger 7,
In, the gas vent of separator 8 is connected with the entrance of the entrance of vapour compression machine 17 and blower 18, the outlet of blower 18 and wind
The entrance of room 12 is connected, and the outlet of vapour compression machine 17 is connected with the entrance of compressed steam heat exchanger 9, compressed steam heat exchange
The outlet of device 9 is connected with the heat release side entrance of the entrance of boiler 16 and the second heat exchanger 25, the cold side of the second heat exchanger 25
Outlet is connected with the entrance of water treatment system 23, and the entrance of the superheated vapor heat exchanger 7 is connected with the outlet of steam turbine 21, mistake
The outlet of hot steam heat exchanger 7 is connected with the outlet of low add-back thermal 24, the outlet of condenser 22 and the second heat exchanger 25
Heat absorption side entrance be connected, the heat absorption side outlet of the second heat exchanger 25 is connected with the entrance of low add-back thermal 24.
The outlet of compressed steam heat exchanger 9 containing dirty hydrophobic delivery pipe 19 with the heat release side entrance of the second heat exchanger 25 through being connected
It is logical；The outlet of compressed steam heat exchanger 9 is connected through on-condensible gas delivery pipe 20 with the entrance of boiler 16.
Primary sludge enters warehouse 2 in sludge by sludge conveying system 1, and the lower part of warehouse 2 is equipped with rotation and gives in sludge
Material machine 3 is sent into the top of fluidized bed dryer 10 using sludge transporting pipeline 4, is equipped with rotation at the top of fluidized bed dryer 10
Cutting sheet 6 is driven by rotating electric machine 5, sludge is cut into short strip shape, and sow into fluidized bed dryer 10, and lead to
It crosses the superheated vapor heat exchanger 7 and compressed steam heat exchanger 9 absorbs heat, the bottom of fluidized bed dryer 10 is equipped with 11 He of air distribution plate
Air compartment 12, and fluidize mud granule as fluidizing agent using steam, and gradually dry after absorbing heat, form dry dirt
Mud, the dewatered sludge particle after drying are discharged by the mud granule drainage conduit 13 of 10 lower section of fluidized bed dryer；With vapor movement
Dewatered sludge powder then pass through separator 8 and separated with steam, the mud granule separated is sent by sewage sludge powder drainage conduit 15
Enter in boiler 16；The steam separated, a part are sent to air compartment 12 by blower 18 and reenter in fluidized bed dryer 10,
Guarantee fluidisation；Another part steam is pressurizeed by vapour compression machine 17 at high steam, then through 25 disengaged vapor of the second heat exchanger
Change latent heat, realization heat recovery, what is formed after cooling is hydrophobic using the recycling of water treatment system 23 containing dirt, and compressed steam exchanges heat
The on-condensible gas and dewatered sludge that device 9 exports then are sent into boiler 16 and carry out burning disposal.
The present embodiment is mainly characterized by: by setting vapour compression machine 17 and compressed steam heat exchanger 9, by drying sludge
The latent heat of vaporization of the steam formed in the process recycles, to reduce the dosage of high temperature and high pressure steam.
Embodiment two
With reference to Fig. 3, the present embodiment further includes condenser 22, water treatment system 23, low add-back thermal 24 and the second heat exchange
Device 25；First Heat Exchanger is the superheated vapor heat exchanger 7, and the outlet of steam turbine 21 is connected with the entrance of the superheated vapor heat exchanger 7,
The outlet of the superheated vapor heat exchanger 7 is connected with the outlet of low add-back thermal 24, the gas vent of separator 8 and the second heat exchange
The heat release side entrance of device 25 and the entrance of blower 18 are connected, heat release side outlet and the water treatment system 23 of the second heat exchanger 25
Entrance is connected, and the outlet of blower 18 is connected with the entrance of air compartment 12, the outlet and the suction of the second heat exchanger 25 of condenser 22
Hot side entrance is connected, and the heat absorption side outlet of the second heat exchanger 25 is connected with the entrance of low add-back thermal 24, the second heat exchange
On-condensible gas and the dewatered sludge outlet of device 25 are connected with the entrance of boiler 16 through on-condensible gas delivery pipe 20.
Primary sludge is entered in sludge in warehouse 2 by sludge conveying system 1, and the lower part of warehouse 2 is equipped with rotation in sludge
Then batcher 3 is sent into the top of fluidized bed dryer 10 by sludge transporting pipeline 4, the top of fluidized bed dryer 10 is set
There is rotary cutting pitch cutting 6, and driven by rotating electric machine 5, sludge is cut into short strip shape, and sow into fluidized bed dryer 10
In, heat is absorbed by the superheated vapor heat exchanger 7, the bottom of fluidized bed dryer 10 is equipped with air distribution plate 11 and air compartment 12, and adopts
It uses steam as fluidizing agent, fluidizes mud granule, gradually dried after absorbing heat, form dewatered sludge, it is dry after drying
Mud granule is discharged by the mud granule drainage conduit 13 of 10 lower section of fluidized bed dryer；With the dewatered sludge powder of vapor movement
It is then separated by separator 8, is then sent into boiler 16 and is burned by sewage sludge powder drainage conduit 15, separator 8 is isolated
The steam a part come is sent in air compartment 12 by blower 18, is then reentered in fluidized bed dryer 10, guarantees fluidisation；Separately
A part of steam is directly entered in the second heat exchanger 25, realizes heat recovery, most end form using the condensed water that condenser 22 exports
At containing it is dirty it is hydrophobic recycled by water treatment system 23, the on-condensible gas and dewatered sludge of the second heat exchanger 25 output are sent into pot
Burning disposal in furnace 16.
The present embodiment is mainly characterized by: cancellation vapour compression machine 17 and compressed steam heat exchanger 9, during drying sludge
The excess steam of formation absorbs heat by the superheated vapor heat exchanger 7 and is used for other purposes such as heat regenerative system, therefore high temperature and pressure
The amount ratio embodiment one of steam is big, but system is relatively easy.
Claims (10)
1. a kind of high-temperature steam suitable for coal-burning boiler fluidizes bed drying sludge co-combustion system, which is characterized in that including sludge
Transportation system (1), rotary feeder (3), blower (18), fluidized bed dryer (10), dewatered sludge transportation system (14) and boiler
(16)；
The outlet of sludge conveying system (1) is connected through rotary feeder (3) with the entrance of fluidized bed dryer (10), fluidized bed
The outlet of drier (10) is connected through dewatered sludge transportation system (14) with the entrance of boiler (16), fluidized bed dryer (10)
Bottom is provided with air compartment (12) and air distribution plate (11), is provided with First Heat Exchanger, fluidized bed drying in fluidized bed dryer (10)
Gas vent at the top of device (10) is connected with the entrance of separator (8), and the sewage sludge powder outlet of separator (8) is defeated through dewatered sludge
System (14) and the entrance of boiler (16) is sent to be connected, the gas vent of separator (8) is connected through blower (18) with air compartment (12)
It is logical.
2. the high-temperature steam according to claim 1 suitable for coal-burning boiler fluidizes bed drying sludge co-combustion system, special
Sign is, the outlet of sludge conveying system (1) through warehouse in sludge (2), rotary feeder (3) and sludge transporting pipeline (4) with
The entrance of fluidized bed dryer (10) is connected；
The outlet of fluidized bed dryer (10) is through mud granule drainage conduit (13) and dewatered sludge transportation system (14) and boiler (16)
Entrance be connected.
3. the high-temperature steam according to claim 1 suitable for coal-burning boiler fluidizes bed drying sludge co-combustion system, special
Sign is, rotary cutting pitch cutting (6) is provided with above fluidized bed dryer (10) entrance and for driving rotary cutting pitch cutting (6)
The rotating electric machine (5) of rotation.
4. the high-temperature steam according to claim 1 suitable for coal-burning boiler fluidizes bed drying sludge co-combustion system, special
Sign is that the inlet of fluidized bed dryer (10) is provided with cutting net (26).
5. the high-temperature steam according to claim 1 suitable for coal-burning boiler fluidizes bed drying sludge co-combustion system, special
Sign is, further includes steam turbine (21), wherein the outlet of steam turbine (21) is connected with the entrance of First Heat Exchanger.
6. the high-temperature steam according to claim 1 suitable for coal-burning boiler fluidizes bed drying sludge co-combustion system, special
Sign is, further includes water treatment system (23), condenser (22), low add-back thermal (24), the second heat exchanger (25) and steam
Compressor (17)；
The First Heat Exchanger includes compressed steam heat exchanger (9) and the superheated vapor heat exchanger (7), wherein the gas of separator (8)
Body outlet is connected with the entrance of the entrance of vapour compression machine (17) and blower (18), outlet and air compartment (12) of blower (18)
Entrance is connected, and the outlet of vapour compression machine (17) is connected with the entrance of compressed steam heat exchanger (9), compressed steam heat exchanger
(9) outlet is connected with the heat release side entrance of the entrance of boiler (16) and the second heat exchanger (25), the second heat exchanger (25)
Heat release side outlet is connected with the entrance of water treatment system (23), entrance and steam turbine (21) of the superheated vapor heat exchanger (7)
Outlet is connected, and the outlet of the superheated vapor heat exchanger (7) is connected with the outlet of low add-back thermal (24), condenser (22)
Outlet is connected with the heat absorption side entrance of the second heat exchanger (25), the heat absorption side outlet of the second heat exchanger (25) and low add-back hot charging
The entrance for setting (24) is connected.
7. the high-temperature steam according to claim 6 suitable for coal-burning boiler fluidizes bed drying sludge co-combustion system, special
Sign is that the outlet of compressed steam heat exchanger (9) is passed through to be entered containing dirty hydrophobic delivery pipe (19) and the cold side of the second heat exchanger (25)
Mouth is connected.
8. the high-temperature steam according to claim 6 suitable for coal-burning boiler fluidizes bed drying sludge co-combustion system, special
Sign is that the outlet of compressed steam heat exchanger (9) is connected through on-condensible gas delivery pipe (20) with the entrance of boiler (16).
9. the high-temperature steam according to claim 1 suitable for coal-burning boiler fluidizes bed drying sludge co-combustion system, special
Sign is, further includes condenser (22), water treatment system (23), low add-back thermal (24) and the second heat exchanger (25)；
First Heat Exchanger is the superheated vapor heat exchanger (7), the outlet and the entrance phase of the superheated vapor heat exchanger (7) of steam turbine (21)
Connection, the outlet of the superheated vapor heat exchanger (7) are connected with the outlet of low add-back thermal (24), and the gas of separator (8) goes out
Mouth is connected with the entrance of the heat release side entrance of the second heat exchanger (25) and blower (18), and the cold side of the second heat exchanger (25) goes out
Mouth is connected with the entrance of water treatment system (23), and the outlet of blower (18) is connected with the entrance of air compartment (12), condenser
(22) outlet is connected with the heat absorption side entrance of the second heat exchanger (25), and the heat absorption side outlet of the second heat exchanger (25) adds with low
The entrance of regenerative apparatus (24) is connected, the entrance of on-condensible gas and the dewatered sludge outlet and boiler (16) of the second heat exchanger (25)
It is connected through on-condensible gas delivery pipe (20).
10. a kind of high-temperature steam suitable for coal-burning boiler fluidizes bed drying sludge co-combustion method, which is characterized in that be based on right
It is required that fluidizing bed drying sludge co-combustion system suitable for the high-temperature steam of coal-burning boiler described in 1, comprising the following steps:
The sludge of sludge conveying system (1) output is sent into fluidized bed dryer (10) through rotary feeder (3) and is dried, and fluidizes
The mud granule of bed dryer (10) bottom discharge is sent into boiler (16) through dewatered sludge transportation system (14) carries out burning disposal,
Wherein, pass through the heat in mud granule air-flow in First Heat Exchanger recycling fluidized bed dryer (10), fluidized bed dryer
(10) gas of top gas outlet discharge, which enters in separator (8), is separated, wherein separator (8) is separated
Sewage sludge powder through dewatered sludge transportation system (14) be sent into boiler (16) in burned, the gas that separator (8) is separated into
Enter in air compartment (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910324617.1A CN109970311B (en) | 2019-04-22 | 2019-04-22 | High-temperature steam fluidized bed sludge drying and blending combustion system and method suitable for coal-fired boiler |
Applications Claiming Priority (1)
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| CN111018313A (en) * | 2020-01-03 | 2020-04-17 | 西安西热锅炉环保工程有限公司 | Low-temperature hydrothermal treatment system and method for sludge of coal-fired power plant unit |
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