CN108728145A - A kind of pulverized coal pyrolysis coupling direct generation of electricity system - Google Patents
A kind of pulverized coal pyrolysis coupling direct generation of electricity system Download PDFInfo
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- CN108728145A CN108728145A CN201810878721.0A CN201810878721A CN108728145A CN 108728145 A CN108728145 A CN 108728145A CN 201810878721 A CN201810878721 A CN 201810878721A CN 108728145 A CN108728145 A CN 108728145A
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- coal
- entrance
- pyrolysis
- pulverized coal
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/005—After-treatment of coke, e.g. calcination desulfurization
-
- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The invention discloses a kind of pulverized coal pyrolysis to couple direct generation of electricity system, including coal pulverizer, pulverized coal pyrolysis device, powder cabin, mill exhauster, boiler, primary air fan and air preheater；Wherein, the outlet of coal pulverizer is connected to the entrance of pulverized coal pyrolysis device, the outlet of pulverized coal pyrolysis device is divided into tar outlet, the outlet of high temperature coke breeze, pyrolysis gas exit and waste residue outlet, pyrolysis gas exit is connected directly to the entrance of boiler, high temperature coke breeze exports the entrance for being connected to powder cabin, the outlet of powder cabin is connected to the entrance of mill exhauster, and the entrance of mill exhauster is connected to the entrance of boiler；The First air outlet of primary air fan is divided into two-way, is connected to the entrance of air preheater all the way, the outlet of air preheater is connected to the heat primary air entrance of coal pulverizer, and another way is connected to the entrance of mill exhauster.A kind of pulverized coal pyrolysis provided by the invention couples direct generation of electricity system, can realize and fully couple pulverized coal pyrolysis device with fired power generating unit.
Description
Technical field
The invention belongs to coal classification sub-primes to utilize field, and in particular to a kind of pulverized coal pyrolysis coupling direct generation of electricity system,
Suitable for after pyrolysis of coal on fossil-fired unit.
Background technology
The low temperature distillation technique in, by coal, in the case where completely cutting off air conditions, heat resolve generates tar, semicoke and coal gas,
The high chemical products of added value can be obtained by carrying out deep processing to tar, and this technique is to realize that coal classification sub-prime utilized has
Effect approach forms the industry chain of circular economy to show unique characteristics at home at present.
For a long time, low temperature distillation technique can only use lump coal (30-80mm) to be used as feed coal, and the production of lump coal in coal
Rate only accounts for 25% or so of mining of raw coal amount, and a large amount of fine coal can not be processed effectively.By the unremitting of domestic relevant enterprise unit
Effort, currently, fine coal distillation process has been provided with application conditions.However, other than generating the tar product of high added value, coal gas
It can not efficiently be utilized with the semicoke of accounting 70% or so, cause certain energy waste and industry development is obstructed.The big portion of coal gas
Divide relatively low by line or drive gas turbine power generation, effective rate of utilization；A large amount of semicoke can only be first cooled to room temperature, then
It is transported to fired power generating unit burning by way of transport, not only to consume energy and cool down to high-temperature semi-coke, but also is unrestrained in vain
The a large amount of high temperature sensible heat of high temperature coke breeze is taken.
Invention content
The purpose of the present invention is to provide a kind of pulverized coal pyrolysis couple direct generation of electricity system, for by pulverized coal pyrolysis device with
Fired power generating unit fully couples, on the one hand, before the standby pulverized coal preparation system of fired power generating unit first wife is mentioned pulverized coal pyrolysis device；Another party
The pyrolysis coal gas that pulverized coal pyrolysis device generates is sent directly into boiler and burnt as tertiary air by face；The third aspect, using thermal motor
The high temperature coke breeze that coke breeze pyrolysis installation generates is delivered in boiler and burns as pumped (conveying) medium by the cold First air assembled.
The present invention adopts the following technical scheme that realize：
A kind of pulverized coal pyrolysis coupling direct generation of electricity system, including coal pulverizer, pulverized coal pyrolysis device, powder cabin, mill exhauster, pot
Stove, primary air fan and air preheater；Wherein,
The outlet of coal pulverizer is connected to the entrance of pulverized coal pyrolysis device, the outlet of pulverized coal pyrolysis device be divided into tar outlet,
The outlet of high temperature coke breeze, pyrolysis gas exit and waste residue outlet, pyrolysis gas exit are connected directly to the entrance of boiler, high temperature powder
Coke outlet is connected to the entrance of powder cabin, and the outlet of powder cabin is connected to the entrance of mill exhauster, and the entrance of mill exhauster is connected to boiler
Entrance；The First air outlet of primary air fan is divided into two-way, is connected to the entrance of air preheater, the outlet of air preheater all the way
It is connected to the heat primary air entrance of coal pulverizer, another way is connected to the entrance of mill exhauster.
The present invention, which further improves, to be, is further included coal bunker, for storing the raw coal from coal yard, and is fed through coal-grinding
Mechanism powder.
The present invention, which further improves, to be, further includes raw coal conveyer belt, for the raw coal from coal yard to be fed through mill
Coal mechanism powder.
The present invention, which further improves, to be, when work, the raw coal from coal yard is sent into coal-grinding mechanism powder, grain size after powder processed
Satisfactory fine coal enters pulverized coal pyrolysis device, and tar, high temperature coke breeze, pyrolysis is precipitated in carbonization in pulverized coal pyrolysis device
Coal gas and waste residue, wherein tar, which are collected, carries out follow-up deep processing, and high temperature coke breeze enters powder cabin through collecting, then via mill exhauster
It is sent directly into boiler combustion；
The First air that the primary air fan of pulverized coal pyrolysis coupling direct generation of electricity system generates is divided into two-way, and it is empty to enter boiler all the way
Air preheater is heated to be heat primary air, and heat primary air subsequently enters drying and pumped (conveying) medium of the coal pulverizer as raw coal powder,
Fine coal is carried after powder processed and enters pulverized coal pyrolysis device, and the pyrolysis coal gas generated with pulverized coal pyrolysis in the pulverized coal pyrolysis device is mixed
Boiler is sent directly into after conjunction to burn as tertiary air；Pumped (conveying) medium of the another way as cold First air as high temperature coke breeze, with row
After the high temperature coke breeze mixing of powder machine discharge boiler combustion is sprayed into through burner.
The present invention has following beneficial technique effect：
A kind of coke breeze pyrolysis coupling direct generation of electricity system provided by the invention, by pulverized coal pyrolysis device and fossil-fired unit
Direct-coupling, it is possible, firstly, to which efficiently use the pulverized coal preparation system of fired power generating unit provides fine coal for pulverized coal pyrolysis device；It secondly, can be with
The pyrolysis coal gas that pulverized coal pyrolysis device generates is sent directly into boiler to burn as tertiary air, the directly outer row of pyrolysis coal gas is avoided to make
Boiler NOx can be effectively reduced while at pollution to generate；Again, the high temperature coke breeze that can directly generate pulverized coal pyrolysis device
Boiler combustion is directly sent by cold First air, effectively avoids the waste of high temperature coke breeze sensible heat.
The present invention can make fired power generating unit realize that perfection couples with pulverized coal pyrolysis device, be the efficient profit of coke breeze after pulverized coal pyrolysis
With a kind of new approach is provided, there is significantly social benefit and environmental benefit.
Description of the drawings
Fig. 1 is the schematic diagram that a kind of pulverized coal pyrolysis of the present invention couples direct generation of electricity system.
In figure：1- coal bunkers, 2- coal pulverizers, 3- pulverized coal pyrolysis devices, 4- powder cabins, 5- mill exhausters, 6- boilers, 7- First airs
Machine, 8- air preheaters.
Specific implementation mode
The present invention is made further instructions below in conjunction with attached drawing.
As shown in Figure 1, a kind of pulverized coal pyrolysis provided by the invention couples direct generation of electricity system, including coal bunker 1, coal pulverizer 2,
Pulverized coal pyrolysis device 3, powder cabin 4, mill exhauster 5, boiler 6, primary air fan 7 and air preheater 8.
Wherein, it is used to store the raw coal from coal yard, and is fed through 2 powder processed of coal pulverizer, the outlet of coal pulverizer 2 is connected to coal
The entrance of powder pyrolysis installation 3, the outlet of pulverized coal pyrolysis device 3 be divided into tar outlet, the outlet of high temperature coke breeze, pyrolysis gas exit with
And waste residue outlet, pyrolysis gas exit are connected directly to the entrance of boiler 6, high temperature coke breeze exports the entrance for being connected to powder cabin 4, powder
The outlet in storehouse 4 is connected to the entrance of mill exhauster 5, and the entrance of mill exhauster 5 is connected to the entrance of boiler 6；The First air of primary air fan 7
Outlet is divided into two-way, is connected to the entrance of air preheater 8 all the way, the outlet of air preheater 8 is connected to the heat one of coal pulverizer 2
Secondary wind entrance, another way are connected to the entrance of mill exhauster 5.
The principle of the present invention figure is as shown in Figure 1, key problem in technology is as follows：
Coal side：Raw coal from coal yard is sent into 2 powder processed of coal pulverizer through coal bunker 1, after powder processed the satisfactory fine coal of grain size into
Entering pulverized coal pyrolysis device 3, tar, high temperature coke breeze, pyrolysis coal gas and waste residue is precipitated in carbonization in pulverized coal pyrolysis device 3,
Wherein tar, which is collected, carries out follow-up deep processing, and high temperature coke breeze enters powder cabin 4 through collecting, then is sent directly into pot via mill exhauster 5
Stove 6 burns；
Wind side：The First air that the primary air fan 7 of pulverized coal pyrolysis coupling direct generation of electricity system generates is divided into two-way, enters all the way
Boiler air preheater 8 is heated to be heat primary air, and heat primary air subsequently enters coal pulverizer 2 as the drying of raw coal powder and defeated
Medium is sent, fine coal is carried after powder processed and enters pulverized coal pyrolysis device 3, is generated with pulverized coal pyrolysis in the pulverized coal pyrolysis device 3
Boiler 6 is sent directly into after pyrolysis coal gas mixing to burn as tertiary air；Another way is as cold First air as the defeated of high temperature coke breeze
Medium is sent, spraying into boiler 6 through burner after being mixed with the high temperature coke breeze that mill exhauster 5 is discharged burns.
The scope of protection of present invention is as follows：
1, raw coal, which is made, using coal pulverizer for a kind of pulverized coal pyrolysis coupling direct generation of electricity system meets pulverized coal pyrolysis device and wants
The fine coal for seeking grain size, drying and pumped (conveying) medium using fired power generating unit air preheater outlet heat primary air as raw coal；
2, a kind of pulverized coal pyrolysis coupling direct generation of electricity system carries out carbonization, production using pulverized coal pyrolysis device to fine coal
Pyrolysis coal gas be sent directly into boiler as tertiary air burn；
3, fine coal is pyrolyzed the high temperature coke breeze of generation in pulverized coal pyrolysis device and enters powder cabin, after row powder fan is discharged with it is cold
It sprays into boiler and burns through boiler-burner after First air mixing.
Claims (4)
1. a kind of pulverized coal pyrolysis couples direct generation of electricity system, which is characterized in that including coal pulverizer (2), pulverized coal pyrolysis device (3),
Powder cabin (4), mill exhauster (5), boiler (6), primary air fan (7) and air preheater (8)；Wherein,
The outlet of coal pulverizer (2) is connected to the entrance of pulverized coal pyrolysis device (3), and the outlet of pulverized coal pyrolysis device (3) is divided into tar
Outlet, the outlet of high temperature coke breeze, pyrolysis gas exit and waste residue outlet, pyrolysis gas exit are connected directly to entering for boiler (6)
Mouthful, high temperature coke breeze exports the entrance for being connected to powder cabin (4), and the outlet of powder cabin (4) is connected to the entrance of mill exhauster (5), mill exhauster
(5) entrance is connected to the entrance of boiler (6)；The First air outlet of primary air fan (7) is divided into two-way, and it is pre- to be connected to air all the way
The entrance of hot device (8), the outlet of air preheater (8) are connected to the heat primary air entrance of coal pulverizer (2), and another way is connected to row
The entrance of powder machine (5).
2. a kind of pulverized coal pyrolysis according to claim 1 couples direct generation of electricity system, which is characterized in that further include coal bunker
(1), it is used to store the raw coal from coal yard, and is fed through coal pulverizer (2) powder processed.
3. a kind of pulverized coal pyrolysis according to claim 1 couples direct generation of electricity system, which is characterized in that further include that raw coal is defeated
Band is sent, for the raw coal from coal yard to be fed through coal pulverizer (2) powder processed.
4. a kind of pulverized coal pyrolysis according to claim 1 couples direct generation of electricity system, which is characterized in that when work, come from
The raw coal of coal yard is sent into coal pulverizer (2) powder processed, and the satisfactory fine coal of grain size enters pulverized coal pyrolysis device (3) after powder processed, in powder
The interior carbonization of pyrolysis of coal device (3) is precipitated tar, high temperature coke breeze, pyrolysis coal gas and waste residue, wherein tar and is collected progress
Follow-up deep processing, high temperature coke breeze enter powder cabin (4) through collecting, then are sent directly into boiler (6) burning via mill exhauster (5)；
The First air that the primary air fan (7) of pulverized coal pyrolysis coupling direct generation of electricity system generates is divided into two-way, and it is empty to enter boiler all the way
Air preheater (8) is heated to be heat primary air, and heat primary air subsequently enters drying and conveying of the coal pulverizer (2) as raw coal powder
Medium, carrying fine coal enters pulverized coal pyrolysis device (3) after powder processed, is generated with pulverized coal pyrolysis in the pulverized coal pyrolysis device (3)
Pyrolysis coal gas mixing after be sent directly into boiler (6) as tertiary air burning；Another way is as cold First air as high temperature coke breeze
Pumped (conveying) medium, with mill exhauster (5) discharge high temperature coke breeze mix after through burner spray into boiler (6) burning.
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| CN201810878721.0A CN108728145A (en) | 2018-08-03 | 2018-08-03 | A kind of pulverized coal pyrolysis coupling direct generation of electricity system |
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