CN107790275A - Flue gas recirculation pipe with cool-down dehumidification function - Google Patents
Flue gas recirculation pipe with cool-down dehumidification function Download PDFInfo
- Publication number
- CN107790275A CN107790275A CN201710973687.0A CN201710973687A CN107790275A CN 107790275 A CN107790275 A CN 107790275A CN 201710973687 A CN201710973687 A CN 201710973687A CN 107790275 A CN107790275 A CN 107790275A
- Authority
- CN
- China
- Prior art keywords
- pipeline section
- flue gas
- measurement instrument
- humidity measurement
- pipe
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
- F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
Abstract
The invention discloses a kind of flue gas recirculation pipe with cool-down dehumidification function, including the first pipeline section, the second pipeline section and the 3rd pipeline section being sequentially connected along flue gas conveying direction；The external cold air input pipe in top of first pipeline section；The middle and lower part of first pipeline section is provided with equal device of air；First inner tube segment is provided with la farr pipe structure；The bottom of second pipeline section is provided with sewage draining exit, and the sewage draining exit controls opening and closing by the automatic drain valve located at the second inner tube segment；The top of 3rd pipeline section is provided with demister and humidity measurement instrument；Electric control valve links with humidity measurement instrument.Flue gas recirculation pipe of the present invention, it can actively introduce cold air, accelerate the water vapor condensation in flue gas, and demister and humidity measurement instrument are set in rear end, ensure that most condensed waters in flue gas recirculation pipe are collected discharge, so as to avoid condensed water corrosion pipeline, endanger the operation of pulverized coal preparation system.
Description
Technical field
The present invention relates to the flue gas recirculation pipe with cool-down dehumidification function.
Background technology
Pulverized coal preparation system is that raw coal is input into the coal dust that certain particle size is made in grinding machine, and grinding machine in use must be
Hot-air is inputted while coal-grinding to dry coal dust.Hot-air is typically derived from hot-blast stove, and its circulatory system is that air passes through wind
After machine is sent into the burning of hot blast stove heat, caused flue gas is sent into the mill dries coal dust, is then sent to and follows by air-introduced machine part
Endless tube road and the mixed wind post for entering furnace outlet, with newly high-temperature flue gas hybrid cooling caused by burning to process requirements temperature, then
Into the mill dries coal dust and repeat this process.
Flue-gas temperature behind the outlet of hot-blast stove air-introduced machine is relatively low, during reflux cycle, the vapor meeting in flue gas
Gradual condensation draining and corrosive cycle pipeline, eventually affect the normal operation of whole pulverized coal preparation system.And existing flue gas recirculation
Pipeline does not set corresponding safeguard measure, and there is great potential safety hazard.
The content of the invention
It is an object of the invention to provide a kind of flue gas recirculation pipe with cool-down dehumidification function, and it can actively introduce cold sky
Gas, accelerate the water vapor condensation in flue gas, and demister and humidity measurement instrument are set in rear end, ensure exhausted in flue gas recirculation pipe
Most of condensed water is collected discharge, so as to avoid condensed water corrosion pipeline, endangers the operation of pulverized coal preparation system.
To achieve the above object, the technical scheme is that a kind of flue gas recirculation with cool-down dehumidification function of design
Pipe, including be sequentially connected along flue gas conveying direction：First pipeline section, the second pipeline section and the 3rd pipeline section；First pipeline section and the 3rd pipe
Section is vertically arranged, the second pipeline section horizontal；The bottom of first pipeline section and the 3rd pipeline section connects the both ends of the second pipeline section respectively；First pipeline section and
3rd pipeline section is stainless steel tube, and the second pipeline section is glass reinforced plastic pipe；
The external cold air input pipe in top of first pipeline section, cold air input pipe are provided with air dryer and motorized adjustment
Valve；The middle and lower part of first pipeline section is provided with equal device of air；First inner tube segment is provided with la farr pipe structure, the la farr pipe structure bit
In the joint portion of cold air input pipe and the first pipeline section；
The bottom of second pipeline section is provided with sewage draining exit, and the sewage draining exit is opened by the automatic drain valve control located at the second inner tube segment
Close；
The top of 3rd pipeline section is provided with demister and humidity measurement instrument, and humidity measurement instrument is located above demister；
The electric control valve links with humidity measurement instrument, if the humidity that humidity measurement instrument detects becomes big, opens big electric adjustable
Save valve；If the humidity that humidity measurement instrument detects diminishes, electric control valve is turned down.
Preferably, first pipeline section and the 3rd pipeline section inwall are covered with hydrophobic corrosion-inhibiting coating.
Preferably, the second pipeline section inwall is covered with hydrophobic coating.
The advantages of the present invention are：A kind of flue gas recirculation pipe with cool-down dehumidification function, its energy are provided
Cold air is actively introduced, accelerates the water vapor condensation in flue gas, and demister and humidity measurement instrument are set in rear end, ensures flue gas
Most condensed waters in circulation pipe are collected discharge, so as to avoid condensed water corrosion pipeline, endanger the operation of pulverized coal preparation system.
Flue gas is introduced into the first pipeline section, the external cold air input pipe of the first pipeline section, the suction of la farr pipe structure can be used dry
Dry cold air, flue gas is cooled rapidly and condensation draining, the water being condensed out are collected in the second pipeline section；Second pipeline section is set certainly
Dynamic draining valve, the Auto-drainage when liquid level reach a certain height；Demister and humidity measurement instrument are provided with 3rd pipeline section, to
The humidity of circulating flue gas is ensured in low spot, will not in subsequent pipeline condensation draining again.
Electric control valve of the present invention links with humidity measurement instrument, if the humidity that humidity measurement instrument detects becomes big, opens big
Electric control valve；If the humidity that humidity measurement instrument detects diminishes, electric control valve is turned down.
First pipeline section and the 3rd pipeline section are stainless steel tube, are easy to be connected with front and rear pipes.In first pipeline section and the 3rd pipeline section
Wall can improve the corrosion resistance of the first pipeline section and the 3rd pipeline section, improve the first pipeline section and the 3rd covered with hydrophobic corrosion-inhibiting coating
The service life of pipeline section.
Because the water being condensed out is collected in the second pipeline section, second pipeline section of the invention selects glass reinforced plastic pipe, can avoid by
Condense aqueous corrosion.Second pipeline section inwall can greatly reduce the alluvial of dirt, be easy to the clear of the second pipeline section covered with hydrophobic coating
Wash.
The present invention also has following features：
1st, apparatus structure is simple, can be achieved to automatically control, without manual intervention.
2nd, circulation line humidity can be monitored, and can be adjusted in real time.
3rd, using la farr pipe structure nature absorption dehydration air, without power set, effect on moisture extraction is good, effectively prevent
The corrosion of pipeline condensed water.
Embodiment
With reference to embodiment, the embodiment of the present invention is further described.Following examples are only used for more
Add and clearly demonstrate technical scheme, and can not be limited the scope of the invention with this.
The technical scheme that the present invention is embodied is：
A kind of flue gas recirculation pipe with cool-down dehumidification function, including be sequentially connected along flue gas conveying direction：First pipeline section,
Two pipeline sections and the 3rd pipeline section；First pipeline section and the 3rd pipeline section are vertically arranged, the second pipeline section horizontal；The bottom of first pipeline section and the 3rd pipeline section
The both ends of the second pipeline section are connected respectively；
First pipeline section and the 3rd pipeline section are stainless steel tube, and the second pipeline section is glass reinforced plastic pipe；
First pipeline section and the 3rd pipeline section inwall are covered with hydrophobic corrosion-inhibiting coating；
Second pipeline section inwall is covered with hydrophobic coating；
The external cold air input pipe in top of first pipeline section, cold air input pipe are provided with air dryer and motorized adjustment
Valve；The middle and lower part of first pipeline section is provided with equal device of air；First inner tube segment is provided with la farr pipe structure, the la farr pipe structure bit
In the joint portion of cold air input pipe and the first pipeline section；
The bottom of second pipeline section is provided with sewage draining exit, and the sewage draining exit is opened by the automatic drain valve control located at the second inner tube segment
Close；
The top of 3rd pipeline section is provided with demister and humidity measurement instrument, and humidity measurement instrument is located above demister；
The electric control valve links with humidity measurement instrument, if the humidity that humidity measurement instrument detects becomes big, opens big electric adjustable
Save valve；If the humidity that humidity measurement instrument detects diminishes, electric control valve is turned down.
Flue gas recirculation pipe of the present invention, it can actively introduce cold air, accelerate the water vapor condensation in flue gas, and set in rear end
Demister and humidity measurement instrument are put, ensures that most condensed waters in flue gas recirculation pipe are collected discharge, so as to avoid condensing
Aqueous corrosion pipeline, endanger the operation of pulverized coal preparation system.
Flue gas is introduced into the first pipeline section, the external cold air input pipe of the first pipeline section, the suction of la farr pipe structure can be used dry
Dry cold air, flue gas is cooled rapidly and condensation draining, the water being condensed out are collected in the second pipeline section；Second pipeline section is set certainly
Dynamic draining valve, the Auto-drainage when liquid level reach a certain height；Demister and humidity measurement instrument are provided with 3rd pipeline section, to
The humidity of circulating flue gas is ensured in low spot, will not in subsequent pipeline condensation draining again.
Electric control valve of the present invention links with humidity measurement instrument, if the humidity that humidity measurement instrument detects becomes big, opens big
Electric control valve；If the humidity that humidity measurement instrument detects diminishes, electric control valve is turned down.
First pipeline section and the 3rd pipeline section are stainless steel tube, are easy to be connected with front and rear pipes.In first pipeline section and the 3rd pipeline section
Wall can improve the corrosion resistance of the first pipeline section and the 3rd pipeline section, improve the first pipeline section and the 3rd covered with hydrophobic corrosion-inhibiting coating
The service life of pipeline section.
Because the water being condensed out is collected in the second pipeline section, second pipeline section of the invention selects glass reinforced plastic pipe, can avoid by
Condense aqueous corrosion.Second pipeline section inwall can greatly reduce the alluvial of dirt, be easy to the clear of the second pipeline section covered with hydrophobic coating
Wash.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (3)
1. the flue gas recirculation pipe with cool-down dehumidification function, it is characterised in that including what is be sequentially connected along flue gas conveying direction：The
One pipeline section, the second pipeline section and the 3rd pipeline section；First pipeline section and the 3rd pipeline section are vertically arranged, the second pipeline section horizontal；First pipeline section and the 3rd
The bottom of pipeline section connects the both ends of the second pipeline section respectively；First pipeline section and the 3rd pipeline section are stainless steel tube, and the second pipeline section is glass
Steel pipe；
The external cold air input pipe in top of first pipeline section, cold air input pipe are provided with air dryer and motorized adjustment
Valve；The middle and lower part of first pipeline section is provided with equal device of air；First inner tube segment is provided with la farr pipe structure, the la farr pipe structure bit
In the joint portion of cold air input pipe and the first pipeline section；
The bottom of second pipeline section is provided with sewage draining exit, and the sewage draining exit is opened by the automatic drain valve control located at the second inner tube segment
Close；
The top of 3rd pipeline section is provided with demister and humidity measurement instrument, and humidity measurement instrument is located above demister；
The electric control valve links with humidity measurement instrument, if the humidity that humidity measurement instrument detects becomes big, opens big electric adjustable
Save valve；If the humidity that humidity measurement instrument detects diminishes, electric control valve is turned down.
2. the flue gas recirculation pipe according to claim 1 with cool-down dehumidification function, it is characterised in that first pipeline section
With the 3rd pipeline section inwall covered with hydrophobic corrosion-inhibiting coating.
3. the flue gas recirculation pipe according to claim 2 with cool-down dehumidification function, it is characterised in that second pipeline section
Inwall is covered with hydrophobic coating.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710973687.0A CN107790275A (en) | 2017-10-19 | 2017-10-19 | Flue gas recirculation pipe with cool-down dehumidification function |
| PCT/CN2017/110357 WO2019075807A1 (en) | 2017-10-19 | 2017-11-10 | Smoke circulation pipe having cooling and dehumidifying functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710973687.0A CN107790275A (en) | 2017-10-19 | 2017-10-19 | Flue gas recirculation pipe with cool-down dehumidification function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107790275A true CN107790275A (en) | 2018-03-13 |
Family
ID=61534333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710973687.0A Pending CN107790275A (en) | 2017-10-19 | 2017-10-19 | Flue gas recirculation pipe with cool-down dehumidification function |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107790275A (en) |
| WO (1) | WO2019075807A1 (en) |
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| CN102296132A (en) * | 2010-06-24 | 2011-12-28 | 上海梅山钢铁股份有限公司 | Blast furnace coal injection system and dehumidification method thereof |
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| US6869277B2 (en) * | 2002-03-16 | 2005-03-22 | Exxonmobil Chemical Patents Inc. | Burner employing cooled flue gas recirculation |
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| CN106669379A (en) * | 2017-01-19 | 2017-05-17 | 上海华之邦科技股份有限公司 | Boiler flue gas recirculation dehumidification device |
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| CN106766824A (en) * | 2017-01-21 | 2017-05-31 | 江苏中圣园科技股份有限公司 | Semi-coke drying system |
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2017
- 2017-10-19 CN CN201710973687.0A patent/CN107790275A/en active Pending
- 2017-11-10 WO PCT/CN2017/110357 patent/WO2019075807A1/en active Application Filing
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| JP2004301496A (en) * | 2003-03-19 | 2004-10-28 | Green Seiju:Kk | Drying system |
| CN101362050A (en) * | 2007-08-07 | 2009-02-11 | 涂建华 | Flue-gas residual heat utilization device of wet desulfurization system |
| CN101955785A (en) * | 2009-07-16 | 2011-01-26 | 沈阳铝镁设计研究院 | System and method for calcining petroleum cokes by rotary kiln with two sections |
| CN102762280A (en) * | 2010-03-09 | 2012-10-31 | 三菱电机株式会社 | Dehumidifier |
| CN102296132A (en) * | 2010-06-24 | 2011-12-28 | 上海梅山钢铁股份有限公司 | Blast furnace coal injection system and dehumidification method thereof |
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| CN102705704A (en) * | 2012-05-30 | 2012-10-03 | 上海工程技术大学 | Fume circulating system for fume impact water-spinning type LNG heating and gasifying furnace |
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| CN103638784A (en) * | 2013-12-17 | 2014-03-19 | 中国能源建设集团广东省电力设计研究院 | Externally heating type wet flue gas dehumidifying method and system |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2019075807A1 (en) | 2019-04-25 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180313 |
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