CN104119003B - The industrial furnace of heat accumulating type partition heating - Google Patents

The industrial furnace of heat accumulating type partition heating Download PDF

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Publication number
CN104119003B
CN104119003B CN201410316086.9A CN201410316086A CN104119003B CN 104119003 B CN104119003 B CN 104119003B CN 201410316086 A CN201410316086 A CN 201410316086A CN 104119003 B CN104119003 B CN 104119003B
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kiln
carbon dioxide
combustion chamber
thermophore
cooling
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CN104119003A (en
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贾会平
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Shijiazhuang Xinhua Energy Environmental Protection Technology Co Ltd
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Shijiazhuang Xinhua Energy Environmental Protection Technology Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/129Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/40Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills

Abstract

The present invention relates to the industrial furnace of a kind of heat accumulating type partition heating, comprise limestone kiln and carbon dioxide treatment unit, limestone kiln is provided with opening for feed, discharge port, decomposition gas outlet and cooling air inlet.Decomposition gas outlet is connected with carbon dioxide treatment unit by induced draft fan, and the entrance of cooling blower is connected with carbon dioxide treatment unit or is communicated with air.Limestone kiln calcining zone is provided with combustion chamber, and the wall of combustion chamber is built by laying bricks or stones by heat conduction brick structures and formed or be made up of metallic substance.The air scoop of combustion chamber is connected with thermophore, and the other end of thermophore is connected with gas blower and blowdown system by T-valve.Cooling zone is provided with lower suction bar, and the outlet of lower suction bar is connected to induced draft fan or fuel preheater.The present invention adds combustion chamber and thermophore, is added the material in heating kiln body by heat conduction brick structures muffle, is conducive to reclaiming high-pureness carbon dioxide, smoke pre-heating combustion air, improves the temperature of combustion air, makes full use of heat resource, reduces the energy expenditure in limestone kiln.

Description

The industrial furnace of heat accumulating type partition heating
Technical field
The invention belongs to calciner technical field, relate to a kind of industrial vertical kiln, be specifically related to the industrial furnace of a kind of heat accumulating type partition heating.
Background technology
Industrial furnace residual heat is recycled, can save energy consumption, reduces thermal technology's products production cost, simultaneously the discharge of decreasing pollution thing.Industrial furnace is large-scale high energy consuming devices, and along with the fast development of national economy, the waste heat of industrial furnace is very abundant, availablely has a high potential.The industry of Iron And Steel Industry, calcium carbide, aluminum oxide industry and refractory industry are energy consumption rich anies influential family, and the quick growth of above-mentioned industry, has driven the high speed development of industrial furnace.In process of production, smog discharge temperature is high for thermal technology's product, is about 240 ~ 360 DEG C.This part fume afterheat is effectively utilized and can reduce energy dissipation, increases economy and the feature of environmental protection of industrial furnace.The carbonic acid gas that in lime production, decomposition of limestone produces is precious resources, due to decompose carbonic acid gas and combustion product gases mix, be unfavorable for recovery and the utilization of carbonic acid gas, therefore need muffle to heat to improve the quality of products and isolate valuable carbonic acid gas.
Authorization Notice No. is open " a kind of energy-saving lime kiln of 102531416B Chinese invention patent, comprise kiln body, kiln body is followed successively by preheating zone from top to down, calcining zone, cooling zone, kiln gas vent pipe is provided with above preheating zone, cooling zone region is provided with normal temperature air input unit, be fixed on the preheated air input unit on normal temperature air input unit, normal temperature air input unit and preheated air input unit all comprise airduct and are connected to the blast cap of airduct air outlet, the blast cap of preheated air input unit is arranged on the top of normal temperature air input unit blast cap, two blast caps form double-deck false cap structure together, kiln gas vent pipe connects interchanger blast inlet, heat transfer tube is provided with in interchanger, the cold wind import of heat transfer tube connects gas blower, the hot-blast outlet of heat transfer tube connects the airduct of preheated air input unit, interchanger air outlet connects vacuum fan ".The discharge flue gas that this patent solves limestone kiln is utilized, and waste heat energy, fuel consumption is large, the problem that combustion air preheating temperature is low, but this patented technology can not solve the recycling problem of carbonic acid gas in lime production.
Summary of the invention
The object of this invention is to provide the industrial furnace of a kind of heat accumulating type partition heating, combustion chamber and limestone kiln thorax are separated, utilizes smoke pre-heating combustion air, collect highly purified carbonic acid gas simultaneously, reduce the energy expenditure in limestone kiln, improve the overall economic efficiency in limestone kiln.
The industrial furnace of heat accumulating type partition heating of the present invention, comprises limestone kiln and carbon dioxide treatment unit, selects to be provided with fuel preheater.Limestone kiln is provided with opening for feed, discharge port, decomposition gas outlet and cooling air inlet.Decomposition gas outlet is connected with carbon dioxide treatment unit by induced draft fan, and cooling air inlet exports with cooling blower and is connected, and the entrance of cooling blower is connected with carbon dioxide treatment unit or is communicated with air.Preheating zone, calcining zone and cooling zone is provided with in the kiln body in limestone kiln.Calcining zone is provided with combustion chamber, and the wall of combustion chamber is built by laying bricks or stones by heat conduction brick structures and formed or be made up of metallic substance.The two ends of combustion chamber are provided with air scoop, fuel oil atomizer and slag notch, and air scoop is connected with thermophore, and the other end of thermophore is connected with gas blower and blowdown system by T-valve.Cooling zone is provided with lower suction bar, and the outlet of lower suction bar is connected to induced draft fan or fuel preheater.
Limestone kiln is vertical setting of types kiln or ring kiln.Vertical setting of types kiln is rectangular configuration, and the calcining zone of vertical setting of types kiln is provided with 2 ~ 50 combustion chambers, and the both sides of each combustion chamber are provided with thermophore, and the air scoop of both sides, combustion chamber is connected with thermophore respectively.Ring kiln is made up of inner ring and outer shroud, and the annular space between inner ring and outer shroud is the kiln thorax of material to be machined.Ring kiln is provided with 2 ~ 50 combustion chambers, and combustion chamber annular is uniformly distributed.The both sides of each combustion chamber are provided with thermophore, and the air scoop of both sides, combustion chamber is connected with thermophore respectively.Carbon dioxide treatment unit is provided with purifying carbon dioxide equipment, carbonic acid gas cooling apparatus and carbon dioxide storage tank, and purifying carbon dioxide equipment, carbonic acid gas cooling apparatus are connected successively with carbon dioxide storage tank.Fuel oil atomizer is gas fuel nozzle, liquid fuel nozzle or solid fuel nozzle, or the combination of above-mentioned fuel oil atomizer.Heat storage in thermophore is ceramic refractory or ferrous materials, and the shape of heat storage is spherule or cellular polyhedron.Use solid fuel nozzle time, heat storage is spherule structure.Metallic substance is cast steel, cast iron or high temperature steel.
The industrial furnace that the present invention heats with heat accumulating type partition arranges combustion chamber and thermophore, the material in heating kiln body is added by heat conduction brick structures muffle, adopt the outer hot mode calcined limestone of external combustion, combustion chamber and decomposition of limestone room are separated, be conducive to the quality improving calcination product, reclaim high-pureness carbon dioxide.The smoke pre-heating combustion air that combustion chamber produces, is conducive to the temperature improving combustion air, makes full use of heat resource, reduce the energy expenditure in limestone kiln, improve the thermo-efficiency of lime production.The present invention not only reduces the energy consumption in limestone kiln, and can obtain this valuable industrial chemicals of high-purity carbon dioxide, improves the overall economic efficiency of industrial furnace.The carbonic acid gas of Wingdale thermolysis reclaims carbonic acid gas by carbon dioxide treatment unit, and the medium circulation making cool lime with carbonic acid gas utilizes, and is conducive to reducing exhaust gas emission, environment protection.The present invention is used for the calcining of multiple thermal technology's products such as Wingdale, rhombspar, blue carbon, rubbish, steel billet.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention with heat accumulating type partition heat industrial stove vertical setting of types kiln;
Fig. 2 is the side-view of Fig. 1;
Fig. 3 is the structural representation of the present invention with heat accumulating type partition heat industrial stove ring kiln;
Fig. 4 is the side-view of Fig. 3.
Wherein:
1-opening for feed, 2-decomposition gas exports, 3-kiln body, 4-combustion chamber, 5-air scoop, 6-thermophore, 7-fuel oil atomizer, 8-lower suction bar, 9-cooling air inlet, 10-discharge port, 11-induced draft fan, 12-carbon dioxide treatment unit, 13-purifying carbon dioxide equipment, 14-carbonic acid gas cooling apparatus, 15-carbon dioxide storage tank, 16-cooling blower, 17-kiln thorax, 18-slag notch, 19-inner ring, 20-annular space, 21-outer shroud, 22-T-valve, 23-valve.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.Scope is not limited to embodiment, and those skilled in the art make any change and also belong to the scope of protection of the invention in the scope that claim limits.
Embodiment 1
The industrial furnace of heat accumulating type partition heating of the present invention as shown in Figure 1 and Figure 2, comprises vertical setting of types kiln and carbon dioxide treatment unit 12.Vertical setting of types kiln is provided with opening for feed 1, discharge port 10, decomposition gas outlet 2 and cooling air inlet 9.Carbon dioxide treatment unit is provided with purifying carbon dioxide equipment 13, carbonic acid gas cooling apparatus 14 and carbon dioxide storage tank 15, and purifying carbon dioxide equipment, carbonic acid gas cooling apparatus are connected successively with carbon dioxide storage tank.Decomposition gas outlet is connected with carbon dioxide treatment unit by induced draft fan 11, and cooling air inlet exports with cooling blower 16 and is connected, and the entrance of cooling blower is connected with carbon dioxide storage tank.Preheating zone, calcining zone and cooling zone is provided with in the kiln thorax 17 in limestone kiln.Calcining zone is provided with combustion chamber 4, and the wall of combustion chamber is built by laying bricks or stones by heat conduction brick structures and formed.The two ends of combustion chamber are provided with air scoop 5, fuel oil atomizer 7 and slag notch 18, and air scoop is connected with thermophore 6, and the other end of thermophore is connected with gas blower and blowdown system by T-valve 22, and fuel oil atomizer is connected with fuel pump deliver line by valve 23.As shown in Figure 2, vertical setting of types kiln is rectangular configuration, and the calcining zone of vertical setting of types kiln is provided with 10 combustion chambers, and the both sides of each combustion chamber are provided with thermophore, and the air scoop of both sides, combustion chamber is connected with thermophore respectively.Heat storage in thermophore 6 is major diameter steel ball.Cooling zone is provided with lower suction bar 8, and the outlet of lower suction bar is connected to induced draft fan 11.
The vertical setting of types kiln operation scheme that the present invention heats with heat accumulating type partition is that limestone material enters in the kiln thorax 17 of vertical setting of types kiln through feeder apparatus, opening for feed 1, takes calcining zone to through preheating.Heat calcined material by the combustion chamber 4 heat muffle produced that burns, Wingdale thermolysis is lime and carbonic acid gas, and carbonic acid gas upwards to run after the material of preheating preheating zone through decomposition gas outlet 2 to carbon dioxide treatment unit 12.High-temperature lime runs downwards and enters cooling zone, and the heat-eliminating medium bloated by cooling blower 16 enters cooling zone through cooling air inlet 9 and cools lime, and cooled lime is through discharge port 10 kiln discharge.Coal dust enters combustion chamber 4 through left side fuel oil atomizer 7, and the air that gas blower bloats enters thermophore 6 through left side T-valve 22, and air heat storage in thermophore enters the combustion-supporting burning in combustion chamber through air scoop 5 after releasing heat preheating.The air scoop of the flue gas that burning produces through right side, to the thermophore 6 on right side, is heat storage accumulation of heat at thermophore, and exothermic flue gas discharges to blowdown system through T-valve 22.The thermophore 6 of both sides hockets accumulation of heat and release heat heating combustion air, both sides, combustion chamber alternate combustion.According to accumulator outlet flue-gas temperature, combustion chamber and thermophore alternate run, realize switch operation by the action of T-valve 22 and valve 23, automatization is carried out.The commutation temperature of accumulator outlet flue gas is 150 ~ 200 DEG C, and concrete commutation temperature is determined according to processing requirement.The waste residue that combustion chambers burn produces is discharged through slag notch 18.Because the heating of Wingdale muffle is calcined, decomposition of limestone obtains fat lime and purity carbon dioxide decomposition gas, and carbonic acid gas enters carbon dioxide treatment unit 12 through decomposition gas outlet 2, induced draft fan 11.At carbon dioxide treatment unit through purifying carbon dioxide equipment 13 udst separation, after carbonic acid gas cooling apparatus 14, be stored into carbon dioxide storage tank 15.A carbonic acid gas part for carbon dioxide storage tank enters cooling zone cool lime through cooling blower, and another part goes out device as carbon dioxide product.High temperature carbon dioxide after cool lime to induced draft fan 11 entrance through lower suction bar 8, together enters carbon dioxide treatment unit with the carbonic acid gas of decomposition of limestone and carries out purifying and cooling process.As selection, the entrance of cooling blower 16 is communicated with air, makes cooling air cool lime with air, and the high-temperature gas after cool lime is to fuel preheater pre-heating fuel material.In vertical setting of types kiln, 10 combustion chambers are arranged side by side, and carry out burning or discharging fume in every side, combustion chamber simultaneously, and the accumulation of heat simultaneously of every side thermophore or preheated air, Automated condtrol, accomplishes scale production.
Embodiment 2
Another embodiment of the present invention is ring kiln, as shown in Figure 3, Figure 4, is made up of inner ring 19 and outer shroud 21, and the annular space 20 between inner ring and outer shroud is kiln thoraxes of material to be machined.8 combustion chambers are uniformly distributed, through inner ring, annular space and outer shroud.The both sides of each combustion chamber are provided with thermophore 6, and the air scoop of both sides, combustion chamber is connected with thermophore respectively.Thermophore warm-up combustion-supporting air outside combustion chamber, the fuel oil atomizer ejection fuel combustion of (outer shroud outside) outside combustion chamber, thermophore 6 accumulation of heat of (inner ring is inner) inside combustor of the flue gas of generation.Then reversing combustion device indoor fuel outlet ejection fuel combustion, in the thermophore inside combustor, heat storage releases heat warm-up combustion-supporting air, thermophore 6 accumulation of heat outside combustion chamber.
Decomposition of limestone obtains fat lime and purity carbon dioxide decomposition gas, and carbonic acid gas enters carbon dioxide treatment unit 12 through decomposition gas outlet 2, induced draft fan 11.After purifying carbon dioxide equipment 13 udst separation, carbonic acid gas cooling apparatus 14, carbon dioxide storage tank 15 is stored at carbon dioxide treatment unit.A carbonic acid gas part for carbon dioxide storage tank enters cooling zone cool lime through cooling blower, and another part goes out device as carbon dioxide product.

Claims (8)

1. an industrial furnace for heat accumulating type partition heating, comprises limestone kiln and carbon dioxide treatment unit (12), selects to be provided with fuel preheater; Described limestone kiln is provided with opening for feed (1), discharge port (10), decomposition gas outlet (2) and cooling air inlet (9), described decomposition gas outlet is connected with carbon dioxide treatment unit by induced draft fan (11), cooling air inlet exports with cooling blower (16) and is connected, and the entrance of cooling blower is connected with carbon dioxide treatment unit or is communicated with air; Be provided with preheating zone, calcining zone and cooling zone in the kiln body (3) in limestone kiln, it is characterized in that: described calcining zone is provided with combustion chamber (4), the wall of combustion chamber is built by laying bricks or stones by heat conduction brick structures and is formed or be made up of metallic substance; The two ends of described combustion chamber are provided with air scoop (5), fuel oil atomizer (7) and slag notch (18), and described air scoop is connected with thermophore (6), and the other end of thermophore is connected with gas blower and blowdown system by T-valve (22); Described cooling zone is provided with lower suction bar (8), and the outlet of described lower suction bar is connected to induced draft fan (11) or fuel preheater.
2. the industrial furnace of heat accumulating type partition heating according to claim 1, is characterized in that: described limestone kiln is vertical setting of types kiln or ring kiln.
3. the industrial furnace of heat accumulating type partition heating according to claim 2, it is characterized in that: described vertical setting of types kiln is rectangular configuration, the calcining zone of vertical setting of types kiln is provided with 2 ~ 50 combustion chambers, and the both sides of each combustion chamber are provided with thermophore, and the air scoop of both sides, combustion chamber is connected with thermophore respectively.
4. the industrial furnace of heat accumulating type partition heating according to claim 2, is characterized in that: described ring kiln is made up of inner ring (19) and outer shroud (21), the kiln thorax that the annular space (20) between inner ring and outer shroud is material to be machined; Described ring kiln is provided with 2 ~ 50 combustion chambers, and combustion chamber annular is uniformly distributed; The both sides of each combustion chamber are provided with thermophore (6), and the air scoop of both sides, combustion chamber is connected with thermophore respectively.
5. the industrial furnace of heat accumulating type partition heating according to claim 1, it is characterized in that: described carbon dioxide treatment unit (12) is provided with purifying carbon dioxide equipment (13), carbonic acid gas cooling apparatus (14) and carbon dioxide storage tank (15), and purifying carbon dioxide equipment, carbonic acid gas cooling apparatus are connected successively with carbon dioxide storage tank.
6. the industrial furnace of heat accumulating type partition heating according to claim 1, is characterized in that: described fuel oil atomizer is gas fuel nozzle, liquid fuel nozzle or solid fuel nozzle, or the combination of above-mentioned fuel oil atomizer.
7. the industrial furnace of heat accumulating type partition heating according to claim 6, is characterized in that: the heat storage in described thermophore (6) is ceramic refractory or ferrous materials; The shape of described heat storage is spherule or cellular polyhedron; When fuel oil atomizer is solid fuel nozzle, described heat storage is spherule structure.
8. the industrial furnace of heat accumulating type partition heating according to claim 1, is characterized in that: described metallic substance is cast steel, cast iron or high temperature steel.
CN201410316086.9A 2014-07-04 2014-07-04 The industrial furnace of heat accumulating type partition heating Active CN104119003B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104496207B (en) * 2014-12-10 2016-11-02 石家庄新华能源环保科技股份有限公司 Heat storage type lime rotary kiln
CN105776916B (en) * 2016-03-13 2018-02-09 石家庄新华能源环保科技股份有限公司 A kind of low-carbon emission cement production device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101830646A (en) * 2009-03-12 2010-09-15 贾会平 Lime calcining method and star-shaped kiln device
CN103058536A (en) * 2012-11-26 2013-04-24 石家庄新华能源环保科技股份有限公司 Heat-accumulation dividing-wall heating rotary kiln device
CN203007148U (en) * 2012-12-25 2013-06-19 石家庄新华能源环保科技股份有限公司 Low-heat-value fuel lime kiln
US8470290B1 (en) * 2008-02-08 2013-06-25 Boise Packaging & Newsprint, L.L.C. Methods and apparatus for industrial waste recovery
CN204022685U (en) * 2014-07-04 2014-12-17 石家庄新华能源环保科技股份有限公司 The industrial furnace of heat accumulating type partition heating

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8470290B1 (en) * 2008-02-08 2013-06-25 Boise Packaging & Newsprint, L.L.C. Methods and apparatus for industrial waste recovery
CN101830646A (en) * 2009-03-12 2010-09-15 贾会平 Lime calcining method and star-shaped kiln device
CN103058536A (en) * 2012-11-26 2013-04-24 石家庄新华能源环保科技股份有限公司 Heat-accumulation dividing-wall heating rotary kiln device
CN203007148U (en) * 2012-12-25 2013-06-19 石家庄新华能源环保科技股份有限公司 Low-heat-value fuel lime kiln
CN204022685U (en) * 2014-07-04 2014-12-17 石家庄新华能源环保科技股份有限公司 The industrial furnace of heat accumulating type partition heating

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