CN201600037U - Electric furnace flue gas waste heat recovery temperature control device - Google Patents
Electric furnace flue gas waste heat recovery temperature control device Download PDFInfo
- Publication number
- CN201600037U CN201600037U CN201020049783XU CN201020049783U CN201600037U CN 201600037 U CN201600037 U CN 201600037U CN 201020049783X U CN201020049783X U CN 201020049783XU CN 201020049783 U CN201020049783 U CN 201020049783U CN 201600037 U CN201600037 U CN 201600037U
- Authority
- CN
- China
- Prior art keywords
- waste heat
- electric furnace
- temperature
- temperature sensor
- flue gas
- 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.)
- Expired - Lifetime
Links
Images
Abstract
The utility model relates to an electric furnace flue gas waste heat recovery temperature control device comprising an electric furnace, a scrap preheating channel connected with the electric furnace, a settling chamber connected with the preheating channel, and a waste heat recovery device, a dust catcher, a dust removal fan and an exhaust funnel connected with the settling chamber in sequence, wherein a temperature control device is arranged between the scrap preheating channel and the settling chamber and comprises a first temperature sensor arranged between the electric furnace and the scrap preheating channel, a second temperature sensor arranged between the preheating channel and the settling chamber, a PLC control system arranged between the first temperature sensor and the second temperature sensor, and a frequency conversion fan connected with the PLC control system. The PLC control system adjusts the induced draft of the frequency conversion fan according to the temperature signals of the first temperature sensor and the second temperature sensor so as to change the mixed cold blast rate and flue gas temperature in the waste heat recovery device and achieve the aim of controlling the inlet flue gas temperature of the waste heat recovery device, thus ensuring the operation stability and safety of the waste heat recovery device.
Description
Technical field
The utility model relates to a kind of attemperating unit, refers in particular to electric furnace flue gas waste heat recovering and temperature regulating device.
Background technology
Steel-smelting electric furnace institute discharged flue gas contains a large amount of high-temperature residual heats, and waste heat flue-gas temperature big ups and downs and contain a large amount of dust are for the needs of energy-saving and emission-reduction, ripe gradually at present and popularize to the utilization of this high-temperature residual heat.At present electric furnace afterheat utilization mode is mainly contained steel scrap preheating and waste heat boiler etc.Generally be the steel scrap preheating channel to be set, utilize a part of waste heat, and then hot flue gas is introduced expansion chamber, deliver to waste heat boiler and further reclaim heat in the electric furnace outlet.In dedusting fan is taken electric furnace away, in the heat extraction flue gas, to be drawn into a part of cold wind from steel scrap preheating channel charging aperture inevitably, have influence on follow-up equipment operation and dust removing effects, the problem of leaking out of Here it is legacy system.In order to solve this problem of leaking out, present method is to adopt the blower fan Sealing Technology, promptly the outside exhausting of blower fan is set, reaches the purpose that cold wind is sneaked in minimizing thereby form the original dedusting fan negative pressure of negative-pressure balancing by the outside exhausting of this blower fan at steel scrap passage charging aperture place.
The realization of the method is the differential pressure signal by the node place, and VFC charging aperture place compressor flow can form the air quantity that neutral point is sneaked into this balancing material mouth cold wind mixing the wind place, solution be the problem of leaking out.The shortcoming of the method existence at present is exactly to have overemphasized the harm of sneaking into cold wind, owing to no longer sneak into cold wind basically, therefore still keep very high temperature during the waste heat equipment of the high-temperature flue gas that comes out from electric furnace after entering expansion chamber, waste heat equipment often is under the bad working environments condition of high temperature, and the booster leakage phenomenon happens occasionally.
Summary of the invention
The purpose of this utility model is to provide a kind of mixed cold blast rate and flue-gas temperature that can enter waste heat recovery apparatus by adjustment, reaches the electric furnace flue gas waste heat recovering and temperature regulating device of the purpose of regulation and control waste heat recovery apparatus inlet flue gas temperature.
For achieving the above object, the utility model adopts following technical scheme: a kind of electric furnace flue gas waste heat recovering and temperature regulating device, it comprises electric furnace, the steel scrap preheating channel that connects electric furnace, the expansion chamber that is connected with preheating channel, the waste heat recovery apparatus, deduster, dedusting fan and the aiutage that are connected in turn with expansion chamber; Be provided with attemperating unit between described steel scrap preheating channel and the expansion chamber, this attemperating unit comprises first temperature sensor that is arranged between electric furnace and the steel scrap preheating channel, be arranged on second temperature sensor between preheating channel and the expansion chamber, the frequency conversion fan that is arranged on the PLC control system between first, second temperature sensor and is connected with the PLC control system.
Compared with prior art, the utlity model has following beneficial effect: by the dynamic sensing waste heat recovery apparatus of first, second temperature sensor inlet temperature, and then by the exhausting amount of PLC control system control frequency conversion fan, flue-gas temperature is controlled in the maximum temperature of permission all the time before making the waste heat recovery apparatus inlet, thereby under the prerequisite of guaranteeing the electric stove dust effect, promote the safety in operation of waste heat recovery apparatus, reduce the investment of waste heat recovery apparatus.
Description of drawings
Fig. 1 is the utility model electric furnace flue gas waste heat recovering and temperature regulating device structural representation.
The specific embodiment
Below in conjunction with specific embodiment the utility model is further described.
Please refer to shown in Figure 1, a kind of electric furnace flue gas waste heat recovering and temperature regulating device, it comprises electric furnace 1, connects the steel scrap preheating channel 2 of electric furnace, the expansion chamber 4 that is connected with preheating channel, the waste heat recovery apparatus 5, deduster 6, dedusting fan 7 and the aiutage 8 that are connected in turn with expansion chamber; Be provided with attemperating unit 3 between described steel scrap preheating channel 2 and the expansion chamber 4, this attemperating unit 3 comprises first temperature sensor 31 that is arranged between electric furnace 1 and the steel scrap preheating channel 2, be arranged on second temperature sensor 32 between preheating channel 2 and the expansion chamber 4, be arranged on PLC control system 33 between first, second temperature sensor and the frequency conversion fan 34 that is connected with the PLC control system.Described steel scrap preheating channel has before threeway outlet 20, the first temperature sensors are arranged on the threeway outlet, after second temperature sensor is arranged on the threeway outlet.Described frequency conversion fan 34 can be the axial flow blower form and installs on the spot, also can be centrifugal blower and connects the strange land installation by pipeline.
Flue-gas temperature decreased after the high-temperature flue gas that exports from electric furnace 1 in the utility model entered steel scrap preheating channel 2 preheating scrap, under the draft of dedusting fan 7, enter expansion chamber 4 sedimentation big dust particles subsequently, enter waste heat recovery apparatus 5 again and reclaim remaining most of fume afterheat, after the flue gas of reducing to lower temperature enters rear portion deduster 6 and purifies, through blower fan 7 by aiutage 8 dischargings.
The flue-gas temperature that enters waste heat recovery apparatus 5 in this process is dynamically control.The variation of first temperature sensor senses electric furnace outlet cigarette temperature, when temperature surpasses waste heat recovery apparatus permission inlet temperature, the PLC control system is sent instruction, regulate the air quantity of frequency conversion fan, mainly be to reduce the exhausting amount, thereby mix feeding mouth place cold wind more, cut down too high electric furnace outlet cigarette temperature, guarantee that the second TEMP actuator temperature is controlled at below the inlet temperature of waste heat recovery apparatus permission, thereby guarantee the waste heat recovery apparatus safe operation of back.When electric furnace outlet cigarette temperature is low excessively, the PLC control system is sent instruction, regulate the air quantity of frequency conversion fan, mainly be to strengthen the exhausting amount, mix feeding mouth place cold wind thereby reduce, make the second TEMP actuator temperature as far as possible near the first TEMP actuator temperature, thereby make the waste heat recovery apparatus inlet flue gas temperature of back remain on higher level.Temperature adjusting relation between each parts is as follows:
The electric furnace exit gas temperature is T1;
Electric furnace outlet flue gas flow is Q1;
A material mouthful cold wind temperature is T2;
A material mouthful cold flow is Q2;
Waste heat equipment entrance temperature is T3;
Waste heat equipment entrance flue gas flow is Q3;
Variable frequency adjustment blower fan exhausting amount is Q4, temperature T 2;
Cold blast rate is Q5 before the balance node, temperature T 2;
Mixing exhaust gas volumn after the balance node is Q3;
Then, have following relational expression according to principle of adjustment and control:
Q1+Q5＝Q3 (a)
Q2+Q5＝Q4 (b)
Flue gas enthalpy relation is as follows:
Q1T1+Q5T2＝Q3T3 (c)
Therefore, when first temperature sensor senses when electric furnace exit gas temperature T1 is higher or lower than default value T, send instruction by the PLC control system, change the air quantity Q4 of frequency conversion fan.Generally speaking, material mouthful cold blast rate Q2 and temperature T 2 are certain, so after Q4 changes, according to above-mentioned discharge relation formula (b), Q5 must change, thereby cause that further the T3 in the flue gas enthalpy relational expression (c) changes, by after the second temperature sensor measurement T3 value T1 value of this signal feedback to the PLC control system and first temperature sensor measurement being compared:
If T1≤T then by dynamic adjustments, strengthens frequency conversion exhausting amount Q4, control T2≤T1;
If T1 〉=T then by dynamic adjustments, reduces frequency conversion exhausting amount Q4, control T2≤T.
The exhausting amount that the utility model is regulated frequency conversion fan by the PLC control system according to the temperature signal of first temperature sensor and the second degree sensor, thereby change the mixed cold blast rate and the flue-gas temperature that enter waste heat recovery apparatus, the purpose that reaches regulation and control waste heat recovery apparatus inlet flue gas temperature is promptly cut down crest, the elevator system security.
Claims (3)
1. electric furnace flue gas waste heat recovering and temperature regulating device, it comprises electric furnace, connects the steel scrap preheating channel of electric furnace, the expansion chamber that is connected with preheating channel, the waste heat recovery apparatus, deduster, dedusting fan and the aiutage that are connected in turn with expansion chamber; It is characterized in that: be provided with attemperating unit between described steel scrap preheating channel and the expansion chamber, this attemperating unit comprises first temperature sensor that is arranged between electric furnace and the steel scrap preheating channel, be arranged on second temperature sensor between preheating channel and the expansion chamber, the frequency conversion fan that is arranged on the PLC control system between first, second temperature sensor and is connected with the PLC control system.
2. electric furnace flue gas waste heat recovering and temperature regulating device as claimed in claim 1 is characterized in that: described steel scrap preheating channel has the threeway outlet, before first temperature sensor is arranged on the threeway outlet, after second temperature sensor is arranged on the threeway outlet.
3. electric furnace flue gas waste heat recovering and temperature regulating device as claimed in claim 1 or 2 is characterized in that: described frequency conversion fan can be the axial flow blower form and installs on the spot, also can be centrifugal blower and connects the strange land installation by pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020049783XU CN201600037U (en) | 2010-01-12 | 2010-01-12 | Electric furnace flue gas waste heat recovery temperature control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020049783XU CN201600037U (en) | 2010-01-12 | 2010-01-12 | Electric furnace flue gas waste heat recovery temperature control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201600037U true CN201600037U (en) | 2010-10-06 |
Family
ID=42811098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020049783XU Expired - Lifetime CN201600037U (en) | 2010-01-12 | 2010-01-12 | Electric furnace flue gas waste heat recovery temperature control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201600037U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718502B (en) * | 2010-01-12 | 2013-01-30 | 无锡市东方环境工程设计研究所有限公司 | Electric furnace flue gas waste heat recovering and temperature regulating device |
| CN104807341A (en) * | 2015-05-20 | 2015-07-29 | 中冶赛迪工程技术股份有限公司 | System and technology for purifying electric furnace flue gas and simultaneously utilizing waste heat |
| CN107399956A (en) * | 2017-08-25 | 2017-11-28 | 重庆升上源环境治理有限公司 | Building porcelain granule production technology |
| CN110686521A (en) * | 2019-11-20 | 2020-01-14 | 中冶南方工程技术有限公司 | Electric furnace flue gas waste heat utilization method and system |
| CN112378269A (en) * | 2020-11-13 | 2021-02-19 | 圣力(清远)钢制品有限公司 | Electric furnace system |
-
2010
- 2010-01-12 CN CN201020049783XU patent/CN201600037U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718502B (en) * | 2010-01-12 | 2013-01-30 | 无锡市东方环境工程设计研究所有限公司 | Electric furnace flue gas waste heat recovering and temperature regulating device |
| CN104807341A (en) * | 2015-05-20 | 2015-07-29 | 中冶赛迪工程技术股份有限公司 | System and technology for purifying electric furnace flue gas and simultaneously utilizing waste heat |
| CN107399956A (en) * | 2017-08-25 | 2017-11-28 | 重庆升上源环境治理有限公司 | Building porcelain granule production technology |
| CN110686521A (en) * | 2019-11-20 | 2020-01-14 | 中冶南方工程技术有限公司 | Electric furnace flue gas waste heat utilization method and system |
| CN112378269A (en) * | 2020-11-13 | 2021-02-19 | 圣力(清远)钢制品有限公司 | Electric furnace system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101718502B (en) | Electric furnace flue gas waste heat recovering and temperature regulating device | |
| CN201600037U (en) | Electric furnace flue gas waste heat recovery temperature control device | |
| CN206310919U (en) | A kind of ceramic metallization atmosphere sintering furnace | |
| CN104075584B (en) | A kind of waste heat of flue gas of heating furnace recovered temperature controls System and method for | |
| CN109813094B (en) | Multi-effect rapid alloy material baking and preheating device and using method thereof | |
| CN103940213A (en) | Coke drying system dry gas temperature and flow self-adjustment control device and method | |
| CN215197532U (en) | Coal pulverizer air inlet configuration system | |
| CN109136457B (en) | Converter gas recovery system and method | |
| CN109236693B (en) | Control method of air blast system of front oxygen-enriched blast furnace | |
| CN202091228U (en) | Ore smelting electric arc furnace flue dust concentration detection and dedusting fan frequency conversion speed regulation system | |
| CN209532098U (en) | A kind of lead-power machine waste-heat recovery device | |
| CN203426427U (en) | Device for treating situation that vanadium-titanium melted iron adheres to the tank | |
| CN207570348U (en) | A kind of full negative pressure coke drying system of flue gas self-circulation type | |
| CN206709526U (en) | A kind of coke drying system for smelting vanadium-titanium magnetite by blast furnace | |
| CN204064001U (en) | Energy-efficient UTILIZATION OF VESIDUAL HEAT IN hot bellows | |
| CN206828447U (en) | A kind of quenching stove prestores the control pressurer system of room | |
| CN201521944U (en) | Waste-heat boiler off-gas control apparatus for float glass smelting kiln | |
| CN114857945B (en) | High-temperature-resistant industrial boiler treatment process | |
| CN212673800U (en) | Hot air circulating device for water slag vertical mill drying system | |
| CN111729480B (en) | Self-circulation hot air exhaust gas dehumidifying device of coal powder preparation system and working method thereof | |
| CN104214793A (en) | Continuous adjusting device for combustion air | |
| CN220398231U (en) | Energy-saving pulverized coal injection system for blast furnace | |
| CN217527788U (en) | Automatic temperature control interlocking device of coal injection and pulverizing system | |
| CN213983607U (en) | Boiler bottom slag discharging device | |
| CN102925620A (en) | Automatic controlling method of converter gas purification and recovery system adjustable Venturi tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101006 Effective date of abandoning: 20100112 |
|
| RGAV | Abandon patent right to avoid regrant |