CN103836899B - Cluster batch (-type) refractory brick dry kiln UTILIZATION OF VESIDUAL HEAT IN technique - Google Patents
Cluster batch (-type) refractory brick dry kiln UTILIZATION OF VESIDUAL HEAT IN technique Download PDFInfo
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- CN103836899B CN103836899B CN201410096931.6A CN201410096931A CN103836899B CN 103836899 B CN103836899 B CN 103836899B CN 201410096931 A CN201410096931 A CN 201410096931A CN 103836899 B CN103836899 B CN 103836899B
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Abstract
The present invention relates to a kind of cluster batch (-type) refractory brick dry kiln UTILIZATION OF VESIDUAL HEAT IN technique, comprise the processing steps such as high-temperature residual heat utilization, electrical heating, low temperature heat, pressure cooling, next circulation, adopt the physical sensible heat that heat recovery technology recovery kiln body and refractory brick discharge at temperature descending section, be used for carrying out preheating to the cold kiln and brindles base that just enter intensification section, then the flue gas hot water will discharged after preheating, reaches the object made full use of waste heat.
Description
Technical field
The present invention relates to a kind of cluster batch (-type) refractory brick dry kiln UTILIZATION OF VESIDUAL HEAT IN technique.
Background technology
The refractory material such as magnesia carbon brick, light-weight brick that current steel industry uses is generally that batching is compressing, then forms through about 220 DEG C of low temperature drying process.Drying process is divided into intensification, insulation and cooling three processes.The dry Electric heating that adopts heats, and consumes a large amount of electric energy.Existing dry kiln each kiln property independent periods is run, and belongs to batch (-type) firing equipment, opens fire door natural heat dissipation and be cooled to kiln discharge temperature (as shown in Figure 1) after terminating arid cycle.According to the rough estimates of Chinese refractory material association, electric seasoning is still current main flow drying process.
Existing drying process Problems existing is as follows:
1) a large amount of physical sensible heat waste, waste heat is not fully used, and the thermal efficiency is low;
2) natural cooling velocity is slow, production efficiency is low, utilization rate of equipment and installations is not high;
3) summer high temperature, heat smoke is that uncontrollable discharge state is discharged in workshop, causes workshop high-temperature effect, and workman's working condition worsens;
4) waste gas is to workshop uncontrollable discharge, pollutes workshop air, affects workman healthy.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, a kind of physical sensible heat adopting heat recovery technology recovery kiln body and refractory brick to discharge at temperature descending section is provided, be used for carrying out preheating to the cold kiln and brindles base that just enter intensification section, the cluster batch (-type) refractory brick dry kiln UTILIZATION OF VESIDUAL HEAT IN technique of flue gas hot water of then will discharge after preheating.
For realizing above-mentioned technical purpose, scheme provided by the invention is: a kind of cluster batch (-type) refractory brick dry kiln UTILIZATION OF VESIDUAL HEAT IN technique, comprises the steps.
Step one, high-temperature residual heat utilizes, and arrives cooldown period after the operation of A kiln, to be sent into by the high-temperature gas in A kiln in the B kiln being in temperature raising period carry out cycle heat exchange, until A kiln and B kiln are substantially without the temperature difference by the circulating line with circulating fan.
Step 2, electrical heating, closes the circulating line between A kiln and B kiln, and carries out electrical heating to technique specification requirement to B kiln, complete heating and the insulating process of B kiln.
Step 3, low temperature heat, temperature more than passing in A kiln in a small amount of normal temperature air adjustment A kiln, more than the waste heat pipe then by having induced-draft fan guides in A kiln, wet body and gas/water-to-water heat exchanger carry out heat exchange, are finally discharged by tail gas.
Step 4, forces cooling, when A kiln temperature is spent low, closes waste heat pipe, passes into normal temperature air and discharged by cryotronl in A kiln, until A kiln arrives the temperature of kiln discharge technological requirement, complete temperature reduction technology process.
Step 5, next circulation, after the operation of B kiln, the UTILIZATION OF VESIDUAL HEAT IN technique of the aforementioned A kiln that circulates to next operation kiln, so circulates.
And described hot-gas temperature is 220 DEG C, A kiln and B kiln are 110 DEG C without the temperature of the temperature difference substantially, and the temperature that the remaining wet body in A kiln and gas/water-to-water heat exchanger carry out heat exchange is about 80 ~ 110 DEG C, and temperature when A kiln temperature is spent low is less than 80 DEG C.
The present invention also provides a kind of cluster batch (-type) refractory brick dry kiln using above-mentioned cluster batch (-type) refractory brick dry kiln UTILIZATION OF VESIDUAL HEAT IN technique, comprise the kiln group be made up of some kilns, each kiln in described kiln group all has electric heating equipment, each kiln is communicated with respectively by circulating line, waste heat pipe, cryotronl, circulating line, waste heat pipe, cryotronl and each kiln connectivity part are equipped with valve, circulating fan is provided with in circulating line, waste heat pipe is communicated with the chimney with exhaust blower after gas/water-to-water heat exchanger, and cryotronl is communicated with the chimney with induced-draft fan.
And described circulating line is all communicated with by Electrocontrolled tee valve door with kiln tail with the kiln hood of each kiln, described waste heat pipe, cryotronl are communicated with by two-way valve with each kiln.
Beneficial effect of the present invention is:
1, by theory calculate, the intensification physics caloric receptivity of brick amounts to power consumption 38.14kWh/ ton brick, waste heat is by theoretical utilization rate 50%, brick economize on electricity 19kWh per ton, the electricity consumption unit consumption measured value of existing dry kiln is 54.67 kWh/ brick per ton, fractional energy savings=19/54.67=34.75%(note: these data do not consider the just leakage produced in waste heat recovery process: remainingly thermogeneticly utilize hot water; Also do not consider the negative leakage produced in waste heat recovery process: as increase blower fan power consumption, temperature raising period and catathermal correspondence etc. between kiln and kiln, positive and negative leakage has Contre-coup and limited on the impact of fractional energy savings);
According to the data that Chinese refractory material association provides, more than 800 ten thousand tons, this refractory brick is produced in the whole nation per year, and can economize on electricity 15,200 ten thousand kWh, amounts to mark 5.32 ten thousand tons, coal, reducing emission of carbon dioxide 13.26 ten thousand tons, economic benefit about 1.52 hundred million yuan;
2, improve the operating efficiency of kiln, owing to adopting forced-convection heat transfer, kiln temperature uniformity improves temperature fall time and shortens than traditional handicraft; Owing to adopting waste heat preheating, the heating-up time shortens than traditional handicraft;
3, waste gas discharges in a organized way, eliminates workshop thermal pollution and smoke pollution, improves workman's working condition.
Accompanying drawing explanation
Fig. 1 is traditional refractory brick dry kiln schematic diagram.
Fig. 2 is that high-temperature residual heat of the present invention utilizes schematic diagram.
Fig. 3 is low temperature heat schematic diagram of the present invention.
Fig. 4 forces to cool schematic diagram.
Wherein, 1, circulation house steward, 2, loop exit arm, 3, Electrocontrolled tee valve door, 4, kiln, 5, cryotronl, 6, two-way valve, 7, circulating fan, 8, circulation entrance branch, 10, waste heat pipe, 11, induced-draft fan, 12, gas/water-to-water heat exchanger, 14, cooling water inlet, 15, hot water outlet.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
The present embodiment provides a kind of cluster batch (-type) refractory brick dry kiln UTILIZATION OF VESIDUAL HEAT IN technique, comprises the steps.
Step one, high-temperature residual heat utilizes, and as shown in Figure 2, arrives cooldown period after the operation of A kiln, to be sent into by the high-temperature gas in A kiln in the B kiln being in temperature raising period carry out cycle heat exchange, until A kiln and B kiln are substantially without the temperature difference by the circulating line with circulating fan.A kiln passes to B kiln the physical sensible heat of kiln body and refractory brick, for B kiln preheating kiln body and refractory brick, to improve utilization rate of waste heat, reduces the power consumption of B kiln temperature raising period.
In actual motion, for the cohort that many kilns are formed, the cooldown period of some kiln and the temperature raising period of other kilns are not necessarily just in time corresponding, and mutual combination heat exchange is a dynamic process, and the optimization of process can by the production scheduling of science and intelligentized control device be supporting realizes.
Step 2, electrical heating, closes the circulating line between A kiln and B kiln, and carries out electrical heating to technique specification requirement to B kiln, complete heating and the insulating process of B kiln.The few high-temperature flue gas of this stage amount of having, enters air through high-temperature smoke discharging pipeline, heat exchanger, chimney.
Step 3, low temperature heat, as shown in Figure 3, temperature more than passing in A kiln in a small amount of normal temperature air adjustment A kiln, more than the waste heat pipe then by having induced-draft fan guides in A kiln, wet body and gas/water-to-water heat exchanger carry out heat exchange, are finally discharged by tail gas.Low temperature exhaust heat heat hot water, can live for have a bath, heating etc., waste heat is fully used.
Step 4, forces cooling, as shown in Figure 4, when A kiln temperature is spent low, closes waste heat tube valve, passes into normal temperature air and discharged by cryotronl in A kiln, until A kiln arrives the temperature of kiln discharge technological requirement, complete temperature reduction technology process.The object of this process accelerates the turnover of kiln, improves stove utilization rate, enhance productivity, and in an organized way discharging waste gas is conducive to reducing workshop thermal pollution and smoke pollution simultaneously, improves workman's working condition.
Step 5, next circulation, after the operation of B kiln, to next operation kiln circulation UTILIZATION OF VESIDUAL HEAT IN technique, so circulates.
Further, above-mentioned hot-gas temperature is 220 DEG C, and A kiln and B kiln are 110 DEG C without the temperature of the temperature difference substantially, and the temperature that the remaining wet body in A kiln and gas/water-to-water heat exchanger carry out heat exchange is about 80 ~ 110 DEG C, and temperature when A kiln temperature is spent low is less than 80 DEG C.
The present embodiment also provides a kind of cluster batch (-type) refractory brick dry kiln using above-mentioned cluster batch (-type) refractory brick dry kiln UTILIZATION OF VESIDUAL HEAT IN technique, comprise the kiln group be made up of some kilns 4, each kiln 4 in described kiln group all has electric heating equipment, each kiln 4 is respectively by circulating line, waste heat pipe 10, cryotronl 5 is communicated with, circulating line, waste heat pipe 10, cryotronl 5 and each kiln 4 connectivity part are equipped with valve, circulating fan 7 is provided with in circulating line, waste heat pipe 10 is communicated with the chimney with exhaust blower after gas/water-to-water heat exchanger 12, cryotronl 5 is communicated with the chimney with induced-draft fan 11.Circulating line comprises circulation house steward 1, loop exit arm 2, circulation entrance branch 8.
Further, above-mentioned circulating line is all communicated with by Electrocontrolled tee valve door 3 with kiln tail with the kiln hood of each kiln 4, and described waste heat pipe 10, cryotronl 5 are communicated with by two-way valve 6 with each kiln 4.
High-temperature residual heat utilizes process to be: in a Ge Yao group, when certain A kiln arrival cooldown period, certain B kiln are in temperature raising period, open the valve that circulating line is led at A, B kiln two ends, cycle heat exchange is started under the effect of blower fan draft, the temperature of A kiln by 220 DEG C progressively to 110 DEG C of convergences, the temperature from ambient temperature of B kiln progressively to 110 DEG C of convergences, through hot air circulation, A kiln passes to B kiln the physical sensible heat of kiln body and refractory brick, for B kiln preheating kiln body and refractory brick.
Electrical heating process is: through cycle heat exchange, and the temperature from ambient temperature progressively convergence 110 DEG C of B kiln, needs electricity consumption heat to 220 DEG C and be incubated, to meet technological requirement.Now close the valve leading to circulating line in B kiln two ends, open the valve that B kiln leads to high-temperature smoke discharging pipeline, open electrical heating, be incubated until furnace temperature rises to 220 DEG C.
Low temperature heat process is: through cycle heat exchange, the temperature of A kiln is by 220 DEG C of progressively convergences 110 DEG C, open the valve that the cold wind shelves of A kiln two ends valve and A kiln lead to high-temperature smoke discharging pipeline, cold wind is allowed to enter through kiln two ends, air (see arrow in Fig. 3 Suo Shi) is entered through high-temperature smoke discharging pipeline, heat exchanger, chimney, until the cigarette temperature drop leaving A kiln is to 80 DEG C, this process utilizes the low temperature exhaust heat heat hot water of 80 DEG C-110 DEG C, for having a bath, the life such as heating.
Pressure cooling procedure is: when the temperature of A kiln is by 110 DEG C of progressively convergences 80 DEG C, there is no value, now open the valve that A kiln leads to low-temperature smoke extraction pipeline, close the valve that A kiln leads to high-temperature smoke discharging pipeline, cold wind is allowed to enter through kiln two ends, air is entered through low-temperature smoke extraction pipeline, chimney, until the cigarette temperature drop leaving A kiln is to kiln discharge technological requirement temperature, brick finished product kiln discharge.
The above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention; some improvement or distortion can also be made; comprise the improvement carried out according to the present invention traditional drying kiln, these improve or distortion also should be considered as protection scope of the present invention.
Claims (4)
1. a cluster batch (-type) refractory brick dry kiln UTILIZATION OF VESIDUAL HEAT IN technique, comprises the steps:
Step one, high-temperature residual heat utilizes, and arrives cooldown period after the operation of A kiln, to be sent into by the high-temperature gas in A kiln in the B kiln being in temperature raising period carry out cycle heat exchange, until A kiln and B kiln are substantially without the temperature difference by the circulating line with circulating fan;
Step 2, electrical heating, closes the circulating line between A kiln and B kiln, and carries out electrical heating to technique specification requirement to B kiln, complete heating and the insulating process of B kiln;
Step 3, low temperature heat, temperature more than passing in A kiln in a small amount of normal temperature air adjustment A kiln, more than the waste heat pipe then by having induced-draft fan guides in A kiln, wet body and gas/water-to-water heat exchanger carry out heat exchange, are finally discharged by tail gas;
Step 4, forces cooling, when A kiln temperature is spent low, closes waste heat pipe, passes into normal temperature air and discharged by cryotronl in A kiln, until A kiln arrives the temperature of kiln discharge technological requirement, complete temperature reduction technology process;
Step 5, next circulation, after the operation of B kiln, to next operation kiln circulation UTILIZATION OF VESIDUAL HEAT IN technique, so circulates.
2. cluster batch (-type) refractory brick dry kiln UTILIZATION OF VESIDUAL HEAT IN technique according to claim 1, it is characterized in that: described hot-gas temperature is 220 DEG C, A kiln and B kiln are 110 DEG C without the temperature of the temperature difference substantially, the temperature that remaining wet body in A kiln and gas/water-to-water heat exchanger carry out heat exchange is about 80 ~ 110 DEG C, and temperature when A kiln temperature is spent low is less than 80 DEG C.
3. one kind uses the cluster batch (-type) refractory brick dry kiln of cluster batch (-type) refractory brick dry kiln UTILIZATION OF VESIDUAL HEAT IN technique as claimed in claim 1, comprise the kiln group be made up of some kilns, it is characterized in that: each kiln in described kiln group all has electric heating equipment, each kiln is respectively by circulating line, waste heat pipe, cryotronl is communicated with, circulating line, waste heat pipe, cryotronl and each kiln connectivity part are equipped with valve, circulating fan is provided with in circulating line, waste heat pipe is communicated with the chimney with exhaust blower after gas/water-to-water heat exchanger, cryotronl is communicated with the chimney with induced-draft fan.
4. cluster batch (-type) refractory brick dry kiln according to claim 3, it is characterized in that: described circulating line is all communicated with by Electrocontrolled tee valve door with kiln tail with the kiln hood of each kiln, described waste heat pipe, cryotronl are communicated with by two-way valve with each kiln.
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| CN201410096931.6A CN103836899B (en) | 2014-03-18 | 2014-03-18 | Cluster batch (-type) refractory brick dry kiln UTILIZATION OF VESIDUAL HEAT IN technique |
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| CN109654896A (en) * | 2019-01-04 | 2019-04-19 | 孟津青城古建制品有限公司 | A kind of application method of the hot cigarette circulation recycling device for brickmaking |
| CN112611213A (en) * | 2020-12-19 | 2021-04-06 | 安徽龙鼎家居工贸有限公司 | Airflow circulating equipment for drying kiln |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2569067Y (en) * | 2002-09-23 | 2003-08-27 | 邹文浩 | Energy saving batch car type kiln |
| US20100122533A1 (en) * | 2008-11-20 | 2010-05-20 | Kalex, Llc | Method and system for converting waste heat from cement plant into a usable form of energy |
| CN101818993A (en) * | 2010-04-29 | 2010-09-01 | 山东新阳能源有限公司 | Fast cooling and residual-heat utilization method of baked brick furnace |
| CN102878808A (en) * | 2012-10-26 | 2013-01-16 | 赵树壮 | Series connection industrial kiln |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0443286A (en) * | 1990-06-06 | 1992-02-13 | Murata Mfg Co Ltd | Continuous baking furnace |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2569067Y (en) * | 2002-09-23 | 2003-08-27 | 邹文浩 | Energy saving batch car type kiln |
| US20100122533A1 (en) * | 2008-11-20 | 2010-05-20 | Kalex, Llc | Method and system for converting waste heat from cement plant into a usable form of energy |
| CN101818993A (en) * | 2010-04-29 | 2010-09-01 | 山东新阳能源有限公司 | Fast cooling and residual-heat utilization method of baked brick furnace |
| CN102878808A (en) * | 2012-10-26 | 2013-01-16 | 赵树壮 | Series connection industrial kiln |
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