CN204648986U - A kind of board-like pair of preheater process system for gas burning lime kiln - Google Patents

A kind of board-like pair of preheater process system for gas burning lime kiln Download PDF

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Publication number
CN204648986U
CN204648986U CN201520152487.5U CN201520152487U CN204648986U CN 204648986 U CN204648986 U CN 204648986U CN 201520152487 U CN201520152487 U CN 201520152487U CN 204648986 U CN204648986 U CN 204648986U
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CN
China
Prior art keywords
gas
preheater
board
lime kiln
flue
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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 - Fee Related
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CN201520152487.5U
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Chinese (zh)
Inventor
洪晓波
洪凯
魏诚志
唐伟杰
姚毅
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SHANGHAI LALLEEN ENGINEERING TECHNOLOGY Co Ltd
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SHANGHAI LALLEEN ENGINEERING TECHNOLOGY Co Ltd
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Priority to CN201520152487.5U priority Critical patent/CN204648986U/en
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Publication of CN204648986U publication Critical patent/CN204648986U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model is about a kind of board-like pair of preheater process system for gas burning lime kiln, comprise plate air preheater, board-like gas preheater, gas burning lime kiln, cyclone dust collectors, sack cleaner, chimney and air duct, gas piping, flue, the smoke discharging end of described gas burning lime kiln connects flue, the output of this flue is provided with described cyclone dust collectors, end is then provided with sack cleaner, described sack cleaner connects described chimney, flue between described cyclone dust collectors and sack cleaner is arranged in parallel two bypass lines, two bypass lines are installed respectively described plate air preheater and board-like gas preheater, described air duct is connected with described plate air preheater by arranging bypass line, described gas piping is connected with described board-like gas preheater by arranging bypass line.After adopting said structure, its beneficial effect is that coal gas loss reduces, and heat transfer efficiency improves.

Description

A kind of board-like pair of preheater process system for gas burning lime kiln
Technical field
The utility model belongs to metallurgical, building materials chemical industry production equipment technical field, and the fume afterheat relating to a kind of gas burning lime kiln utilizes, and is specifically related to a kind of board-like pair of preheater process system for gas burning lime kiln.
Background technology
Smelter utilizes the blast furnace gas that produces in blast furnace ironmaking process as production of energy lime for gas burning lime kiln.Because the calorific value of blast furnace gas is low, in order to ensure there are enough sintering temperatures in kiln, the supply usually by increasing coal gas ensures the quantity delivered of effective flammable coal gas.But when the low temperature coal gas amount entering stove increases, exhaust gases after combustion amount increases and CaCO in lime-roasting process thereupon 3the CO produced after decomposes 2gas increases thereupon, and these flue-gas temperatures are generally at 350 DEG C-550 DEG C, even more than 600 DEG C, is directly arranged outward by chimney and causes a large amount of thermal waste.Therefore, the thermal efficiency of traditional limekiln process system is low, and energy consumption is high, yields poorly.For this reason; explore the emphasis that air and gas preheating technology becomes numerous enterprises research; namely gas-gas heat transfer technology that the high-temperature flue gas utilizing limekiln to produce cools high-temperature flue gas while carrying out preheating to the air and coal gas that enter kiln; Mist heat recovering; improve system thermal efficiency, reach object that is energy-saving and cost-reducing and protection of the environment.
The flue-gas temperature produced due to limekiln is higher, and prior art has all rested on utilization tubular heat exchanger in parallel and carried out the two preheating of air gas or air employing tubular heat exchanger, and coal gas adopts the waste heat reclaiming process of heat exchange of heat pipe series connection; Thermal efficiency ratio is lower, fails the waste heat of efficient recovered flue gas.Therefore, be necessary to design a kind of process system that can reclaim limekiln fume afterheat comprehensively and effectively, save production cost.
Utility model content
The purpose of this utility model is to provide a kind of board-like pair of preheater process system for gas burning lime kiln, fails high efficiente callback, fuel consumption is large, cost is high problem to solve existing limekiln fume afterheat.
For achieving the above object, the utility model is by the following technical solutions:
A kind of board-like pair of preheater process system for gas burning lime kiln, comprise plate air preheater, board-like gas preheater, gas burning lime kiln, cyclone dust collectors, sack cleaner, chimney and air duct, gas piping, flue, the smoke discharging end of described gas burning lime kiln connects flue, the output of this flue is provided with described cyclone dust collectors, end is then provided with sack cleaner, described sack cleaner connects described chimney, flue between described cyclone dust collectors and sack cleaner is arranged in parallel two bypass lines, two bypass lines are installed respectively described plate air preheater and board-like gas preheater, described air duct is connected with described plate air preheater by arranging bypass line, described gas piping is connected with described board-like gas preheater by arranging bypass line.
According to the utility model, each bypass line carries out switching the running status of described plate air preheater and board-like gas preheater by arranging some valves and thermometric load cell.
According to the utility model, the thermal medium effluent journey of plate air preheater and board-like gas preheater is one-way process and arranges, cold side medium flow process is one-way process or multidirectional flow arrangement.
According to the utility model, the heat transfer element of plate air preheater and board-like gas preheater is corrugated plate dst heat transfer element, adopts all welded type structure between this heat transfer element.
Corrugated plate dst heat transfer element of the present utility model adopts high temperature resistant high-quality stainless steel material, good stability in high temperature environments, long service life.
The board-like pair of preheater process system for gas burning lime kiln of the present utility model, its beneficial effect is that heat transfer efficiency is high, the fume afterheat that high efficiente callback limekiln is discharged, and economize energy reduces production cost, is embodied in:
1, the high-temperature flue gas of gas burning lime kiln passes through mode preheating blast furnace gas and the combustion air of heat convection, and improve the ignition temperature of low calorie fuels, limekiln fume afterheat obtains high efficiente callback;
2, while fuel consumption reduces, in limekiln, there are enough sintering temperatures and required heat, thus improve the quality of calcination product;
3, solve dust content in pre existing thermal process system larger, the defect that heat exchanger easily blocks up, reduces maintenance cost;
4, greatly reduce the temperature of waste gas, the heat of high-temperature flue gas is sent outside as a vapor, waste gas is discharged with normal temperature, reaches the object of energy-saving and emission-reduction, reduce the injury to environment and human body;
5, the setting of cyclone dust collectors, avoids a large amount of dusts directly enter described plate air preheater and board-like gas preheater thus affect its service life;
6, preheater is arranged on by-pass line by native system, can not affect the normal work in limekiln because of the fault of preheater.
Accompanying drawing explanation
Fig. 1 is the structural representation of board-like pair of preheater process system of the present utility model.
In figure: 1, plate air preheater; 2, board-like gas preheater; 3, gas burning lime kiln; 4, cyclone dust collectors; 5, sack cleaner; 6, chimney; 7, air duct; 8, gas piping; 9, flue; 10, valve; 11, thermometric load cell.
Detailed description of the invention
Below in conjunction with accompanying drawing, the board-like pair of preheater process system for gas burning lime kiln of the present utility model is described in further detail.
As shown in Figure 1, for of the present utility model for board-like pair of preheater process system of gas burning lime kiln, comprise plate air preheater 1, board-like gas preheater 2, gas burning lime kiln 3, cyclone dust collectors 4, sack cleaner 5, chimney 6 and air duct 7, gas piping 8, flue 9, the smoke discharging end of described gas burning lime kiln 3 connects flue 9, the output of this flue 9 is provided with described cyclone dust collectors 4, end is then provided with sack cleaner 5, described sack cleaner 5 connects described chimney 6, flue 9 between described cyclone dust collectors 4 and sack cleaner 5 two bypass lines have been arranged in parallel, two bypass lines are installed respectively described plate air preheater 1 and board-like gas preheater 2, described air duct 7 is connected with described plate air preheater 1 by arranging bypass line, described gas piping 8 is connected with described board-like gas preheater 2 by arranging bypass line.
Each bypass line carries out switching the running status of described plate air preheater 1 and board-like gas preheater 2 by arranging some valves 10 and thermometric load cell 11.
The thermal medium effluent journey of plate air preheater 1 and board-like gas preheater 2 is one-way process and arranges, is not easy alluvial, blocking; Cold side medium flow process is one-way process or multidirectional flow arrangement, improves heat exchange efficiency.
The heat transfer element of plate air preheater 1 and board-like gas preheater 2 is corrugated plate dst heat transfer element, adopts all welded type structure between this heat transfer element.
Corrugated plate dst heat transfer element of the present utility model adopts high temperature resistant high-quality stainless steel material, good stability in high temperature environments, long service life.
Described flue gas flow direction of the present utility model is: flue gas arrives cyclone dust collectors 4 from the outlet of gas burning lime kiln 3 by flue 9, after carrying out rough dusting, enter plate air preheater 1 and board-like gas preheater 2, after participating in heat exchange, enter sack cleaner 5 dedusting further again, finally discharge from chimney 6.
Air flow of the present utility model is: Cryogenic air enters plate air preheater 1 by air duct, after participating in heat exchange, enters in gas burning lime kiln 3.
Gas Flow of the present utility model, to entering after board-like gas preheater 2 participates in heat exchange for: low temperature coal gas, enters in gas burning lime kiln 3.
During use, when lower from the flue-gas temperature of gas burning lime kiln 3, flue gas enters cyclone dust collectors 4 through flue 9, after the most of dust in removing flue gas, then enter sack cleaner 5 further after dedusting discharged to chimney 6; When the flue-gas temperature of gas burning lime kiln 3 raises gradually, close the valve 10 on flue 9, gas piping 8 and air duct 7, open the valve 10 on each by-pass line and thermometric load cell 11, now, high-temperature flue gas from gas burning lime kiln 3 enters cyclone dust collectors 4, after most of dust in removing flue gas, enter plate air preheater 1 and board-like gas preheater 2 respectively, after Cryogenic air and coal gas participate in heat exchange, flue-gas temperature reduces, enter sack cleaner 5 further after dedusting discharged to chimney 6.
This uses board-like pair of novel preheater process system, when the flue-gas temperature of gas burning lime kiln 3 is higher, also can according to actual service condition, only turn on the gas-fire valve 10 on the bypass line of pipeline 8 or air duct 7 and thermometric load cell 11, and plate air preheater 1 or board-like gas preheater 2 participate in heat exchange.Adopt board-like pair of heat retrieving apparatus process system of the present utility model, its beneficial effect is: when one of them preheater needs repairing, cleans or changes, the valve 10 on corresponding bypass line and pressure measurement temperature element 11 can be closed, and another preheater is still in operation, thus the carrying out of flue gas heat exchange can not be affected.
The above is only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (4)

1. a board-like pair of preheater process system for gas burning lime kiln, it is characterized in that, comprise plate air preheater, board-like gas preheater, gas burning lime kiln, cyclone dust collectors, sack cleaner, chimney and air duct, gas piping, flue, the smoke discharging end of described gas burning lime kiln connects flue, the output of this flue is provided with described cyclone dust collectors, end is then provided with sack cleaner, described sack cleaner connects described chimney, flue between described cyclone dust collectors and sack cleaner is arranged in parallel two bypass lines, two bypass lines are installed respectively described plate air preheater and board-like gas preheater, described air duct is connected with described plate air preheater by arranging bypass line, described gas piping is connected with described board-like gas preheater by arranging bypass line.
2. as claimed in claim 1 for board-like pair of preheater process system of gas burning lime kiln, it is characterized in that, each bypass line carrying out switching the running status of described plate air preheater and board-like gas preheater by arranging some valves and thermometric load cell.
3. as claimed in claim 1 for board-like pair of preheater process system of gas burning lime kiln, it is characterized in that, the thermal medium effluent journey of plate air preheater and board-like gas preheater is one-way process and arranges, cold side medium flow process is one-way process or multidirectional flow arrangement.
4., as claimed in claim 1 for board-like pair of preheater process system of gas burning lime kiln, it is characterized in that, the heat transfer element of plate air preheater and board-like gas preheater is corrugated plate dst heat transfer element, adopts all welded type structure between each heat transfer element.
CN201520152487.5U 2015-03-17 2015-03-17 A kind of board-like pair of preheater process system for gas burning lime kiln Expired - Fee Related CN204648986U (en)

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Application Number Priority Date Filing Date Title
CN201520152487.5U CN204648986U (en) 2015-03-17 2015-03-17 A kind of board-like pair of preheater process system for gas burning lime kiln

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106679438A (en) * 2017-01-13 2017-05-17 成都易态科技有限公司 Lime kiln high-temperature waste gas recycling system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106679438A (en) * 2017-01-13 2017-05-17 成都易态科技有限公司 Lime kiln high-temperature waste gas recycling system

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20150916

Termination date: 20180317