CN104344741A - System for performing hydrochloric acid waste fluid spray roasting through industrial waste heat and control method - Google Patents
System for performing hydrochloric acid waste fluid spray roasting through industrial waste heat and control method Download PDFInfo
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- CN104344741A CN104344741A CN201410588781.0A CN201410588781A CN104344741A CN 104344741 A CN104344741 A CN 104344741A CN 201410588781 A CN201410588781 A CN 201410588781A CN 104344741 A CN104344741 A CN 104344741A
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- Y—GENERAL 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention is applicable to the fields of metallurgical, machining and chemical industries, and provides a system for performing hydrochloric acid waste fluid spray roasting through industrial waste heat and a control method. The system comprises a roasting furnace, wherein one or more waste heat flue gas nozzles are arranged in the furnace bosh tangential direction of the roasting furnace; each waste heat flue gas nozzle is connected with a waste heat supply system through a waste heat supply pipe; a waste heat flow regulating valve, a waste heat flow meter and a waste heat switching valve are arranged on each waste heat supply pipe; the system comprises a main control board; a temperature sensor is arranged at the furnace top or on the furnace bosh of the roasting furnace; the main control board is connected with the temperature sensor, the waste heat flow regulating valves and the waste heat flow meters. The system uses industrial waste heat as a heat source, provides reaction temperature and heat for the roasting furnace for high-temperature decomposition, uses fuel gas as an auxiliary heat source under the condition that the waste heat source cannot be provided or the heat cannot meet requirements, and guarantees that the reaction is performed normally. The system has an obvious energy-saving effect, and is low in running cost.
Description
Technical field
The invention belongs to metallurgy, machining and chemical industry field, particularly relate to one and utilize industrial exhaust heat to carry out hydrochloride waste spray roasting system and control method.
Background technology
Iron and steel, machining, chemical enterprise hydrochloric acid pickling waste liquor contain a large amount of frerrous chlorides, iron chloride and metal chloride, and hydrochloride waste generally adopts spray roasting to regenerate spent acid.Its regeneration technology is: spent acid directly carries out heat exchange by the thermal bake-out gas produced with roaster in preconcentrator to be caused part acid solution to be evaporated and concentrates.Acid solution is constantly fed in roaster with constant by VFC pump by the purification spent acid after concentrated, the nozzle of acid solution on spray gun in roaster by spent acid atomisation.
Roaster lower disposed has heating burner, and the acid solution sprayed into, in the stove of high temperature (500-650 DEG C), following decomposition reaction occurs:
2F
eCl
2+2H
2O+1/2O
2＝F
e2O
3+4HCl
2FeCl
3+3H
2O＝Fe
2O
3+6HCl
The Fe of solid particle
2o
3because Action of Gravity Field is fallen in the bullet bottom roaster, discharged by the rotary valve bottom roaster and deposit through sending into iron powder storage.Roaster gas is made up of steam, HCl gas and burnt gas and leaves from roaster top and very fast by cyclone separator, by brown iron oxide dust separation contained in gas out.Isolated brown iron oxide turns back to roaster by rotary valve.Then roasting gas enters into preconcentrator and gas-liquid separator part, and in preconcentrator, high-temperature gas directly contacts with circulation acid solution and carries out heat exchange, and the evaporation due to part acid solution makes circulation acid solution be concentrated.Utilize oxide solid particle residual in circulation acid solution washing gas simultaneously.
Cool and is separated the gas after dust and enters into absorption tower, drip washing of spraying water, gas is sent into bottom absorption tower, in counter-current process, in gas, HCl is only absorbed by the water formation regenerated acid, and is collected in the bottom on absorption tower, regenerated acid from absorption tower according to gravity current to regenerated acid storage tank.Absorption tower waste gas out through washing, absorb, purification, to reach after discharge standard from blowdown stack discharged to air.
Existing spray roasting hydrochloric acid regenerating device, generally adopts the combustion gas such as natural gas, liquefied petroleum gas, diesel oil, coke-stove gas, blast furnace gas, water-gas or mixed gas as combustion medium, for roaster provides the thermal source required for regeneration of hydrochloric acid.Due to natural gas, liquefied petroleum gas, diesel oil, other various gas prices higher, adopt traditional combustion medium, make hydrochloric acid spray roasting method process operation expense high.
Summary of the invention
In view of the above problems, the object of the present invention is to provide one to utilize industrial exhaust heat to carry out hydrochloride waste spray roasting system, be intended to solve the high technical problem of existing hydrochloride waste spray roasting system cloud gray model expense.
On the one hand, describedly utilize industrial exhaust heat to carry out hydrochloride waste spray roasting system to comprise roaster, a waste heat flue gas nozzle is at least provided with along described roaster furnace bosh tangential direction, each waste heat flue gas nozzle is connected to waste heat for supplying system by waste heat for supplying Guan Jun, described waste heat for supplying pipe is provided with residual heat stream adjustable valve, residual heat stream gauge and waste heat switch valve, described system comprises master control borad, furnace roof or the furnace bosh position of described roaster are provided with temperature sensor, described master control borad and described temperature sensor, residual heat stream adjustable valve is connected with residual heat stream gauge, described master control borad is for receiving data on flows and the roaster in-furnace temperature data of waste heat flue gas, and the aperture of residual heat stream adjustable valve is controlled according to the data on flows of the roaster in-furnace temperature detected and/or current waste heat flue gas.
Further, a gas nozzle is also at least provided with along described roaster furnace bosh tangential direction, described gas nozzle is connected with Gas Pipe and air delivery pipe, described Gas Pipe is provided with gas consumption adjusting valve, gas meter and gas switch valve, described air delivery pipe is provided with air flow rate adjustment valve, mass air flow sensor and combustion fan, described gas consumption adjusting valve, gas meter, air flow rate adjustment valve, mass air flow sensor is connected to described master control borad, described master control borad is according to the aperture of the corresponding gas consumption adjusting valve of gas-flow value adjustment combustion, the aperture adjusting air flow rate adjustment valve is carried out according to air-fuel ratio and gas-flow value.
Further, described waste heat for supplying pipe is also connected with smoke discharge pipe, and described smoke discharge pipe is provided with residue fume emission control valve.
Further, described Gas Pipe is also provided with nitrogen tube, described nitrogen tube is provided with nitrogen switch valve.
Further, described waste heat flue gas nozzle is tapering type structure, ecto-entad undergauge.
Further, the flow velocity of described waste heat flue gas nozzle is 10 ~ 25m/s.
On the other hand, the described control method utilizing industrial exhaust heat to carry out hydrochloride waste spray roasting comprises:
Open the waste heat switch valve on waste heat for supplying pipe and residual heat stream adjustable valve, and receive data on flows and the roaster in-furnace temperature data of waste heat flue gas;
Control the aperture of residual heat stream adjustable valve according to the data on flows of the roaster in-furnace temperature detected and/or current waste heat flue gas, make roaster in-furnace temperature reach temperature in roaster required for decomposition reaction.
Further, the data on flows of the roaster in-furnace temperature that described basis detects and/or current waste heat flue gas controls the aperture of residual heat stream adjustable valve, makes roaster in-furnace temperature reach temperature step in roaster required for decomposition reaction, specifically comprises:
According to the roaster in-furnace temperature detected according to the aperture controlling residual heat stream adjustable valve, roaster in-furnace temperature is made to reach temperature in roaster required for decomposition reaction.
Further, the data on flows of the roaster in-furnace temperature that described basis detects and/or current waste heat flue gas controls the aperture of residual heat stream adjustable valve, makes roaster in-furnace temperature reach temperature step in roaster required for decomposition reaction, specifically comprises:
According to the aperture of the flow-control residual heat stream adjustable valve of current waste heat flue gas, make the flow value of current waste heat flue gas be adjusted to design discharge value gradually from initial flow value, roaster enters preliminarily stabilised state;
Light first gas nozzle, according to the aperture of the corresponding gas consumption adjusting valve of gas-flow value adjustment combustion received, carry out according to air-fuel ratio and gas-flow value the aperture adjusting air flow rate adjustment valve; If light first gas nozzle to reach and still do not reach design temperature in roaster stove, then light follow-up gas nozzle successively, until reach design temperature in roaster stove;
Reach in roaster stove after design temperature, roaster proceeds to the production phase, is discharged by waste heat flue gas unnecessary when normally producing via residue fume emission control valve.
Further, the data on flows of the roaster in-furnace temperature that described basis detects and/or current waste heat flue gas controls the aperture of residual heat stream adjustable valve, makes roaster in-furnace temperature reach temperature step in roaster required for decomposition reaction, specifically comprises:
According to the aperture of the flow-control residual heat stream adjustable valve of current waste heat flue gas, the flow value of current waste heat flue gas is made to be adjusted to design discharge value gradually from initial flow value;
If after now roaster in-furnace temperature reaches design temperature, roaster proceeds to the production phase, waste heat flue gas unnecessary when normally producing is discharged via residue fume emission control valve;
If now waste heat for supplying system malfunctions, light first gas nozzle, according to the aperture of the corresponding gas consumption adjusting valve of gas-flow value adjustment combustion received, the aperture adjusting air flow rate adjustment valve is carried out according to air-fuel ratio and gas-flow value, if light first gas nozzle to reach and still do not reach design temperature in roaster stove, then light follow-up gas nozzle successively, until reach design temperature in roaster stove;
After roaster in-furnace temperature reaches design temperature, roaster proceeds to the production phase, is discharged by waste heat flue gas unnecessary when normally producing via residue fume emission control valve.
The invention has the beneficial effects as follows: the present invention adopts industrial exhaust heat (as the high-temperature residual heat etc. that iron and steel enterprise's continuous annealing unit, hot-rolling heating furnace, blast-furnace hot-air furnace flue gas exhaust heat produce) as thermal source, provides reaction temperature and heat for roaster produces pyrolytic; In preferred embodiment, under the operating mode that waste heat thermal source can not supply or heat can not meet the demands, for meeting the temperature required for calcination, adopt combustion gas (natural gas, liquefied petroleum gas, diesel oil, coke-stove gas, blast furnace gas, water-gas or mixed gas) as auxiliary thermal source, ensure that reaction is normally carried out.Energy-saving effect of the present invention is remarkable, operating cost is low.
Accompanying drawing explanation
Fig. 1 is that the industrial exhaust heat that utilizes that the embodiment of the present invention provides carries out a kind of structure chart of hydrochloride waste spray roasting system;
Fig. 2 is that the industrial exhaust heat that utilizes that the embodiment of the present invention provides carries out the another kind of structure chart of hydrochloride waste spray roasting system.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In order to technical solutions according to the invention are described, be described below by specific embodiment.
The industrial exhaust heat that utilizes that Fig. 1 shows the embodiment of the present invention to be provided carries out the structure of hydrochloride waste spray roasting system, illustrate only the part relevant to the embodiment of the present invention for convenience of explanation.
What the present embodiment provided utilize industrial exhaust heat to carry out hydrochloride waste spray roasting system comprises roaster 1, a waste heat flue gas nozzle 21 is at least provided with along described roaster furnace bosh tangential direction, each waste heat flue gas nozzle is connected to waste heat for supplying system (not shown) by waste heat for supplying Guan Jun, described waste heat for supplying pipe is provided with residual heat stream adjustable valve 22, residual heat stream gauge 23 and waste heat switch valve 24, described system comprises master control borad 3, furnace roof or the furnace bosh position of described roaster 1 are provided with temperature sensor 11, described master control borad 3 and described temperature sensor 11, residual heat stream adjustable valve 22 is connected with residual heat stream gauge 23, described master control borad 3 is for receiving data on flows and the roaster in-furnace temperature data of waste heat flue gas, and the aperture of residual heat stream adjustable valve 22 is controlled according to the data on flows of the roaster in-furnace temperature detected and/or current waste heat flue gas.Preferred further, described waste heat for supplying pipe is also connected with smoke discharge pipe, and described smoke discharge pipe is provided with residue fume emission control valve 5.
In the present embodiment, tangentially arrange one or more waste heat flue gas nozzle at roaster furnace bosh, the flow velocity of waste heat flue gas nozzle is generally 10 ~ 25m/s, and waste heat flue gas nozzle adopts tapering type, ecto-entad undergauge.Each waste heat flue gas nozzle is connected with waste heat for supplying pipe, waste heat for supplying pipe is provided with residual heat stream adjustable valve, residual heat stream gauge and waste heat switch valve, the aperture of residual heat stream adjustable valve is controlled by master control borad, temperature sensor output temperature data in roaster, residual heat stream gauge output flow data on waste heat for supplying pipe, master control borad controls according to the data on flows of roaster in-furnace temperature and/or current waste heat flue gas, to meet the temperature requirement under the various working condition of roaster.
As a kind of preferred embodiment, under normal circumstances, if under the operating mode that waste heat for supplying system can not supply or heat can not meet the demands, for meeting the temperature required for calcination, need to adopt combustion gas (natural gas or liquefied gas, diesel oil, industrial combustion gas etc.) as auxiliary thermal source, to need to set up one or more gas nozzle.During specific implementation, as shown in Figure 2, a gas nozzle 41 is also at least provided with along described roaster furnace bosh tangential direction, described gas nozzle 41 is connected with Gas Pipe and air delivery pipe, described Gas Pipe is provided with gas consumption adjusting valve 42, gas meter 43 and gas switch valve 44, described air delivery pipe is provided with air flow rate adjustment valve 45, mass air flow sensor 46 and combustion fan 47, described gas consumption adjusting valve 42, gas meter 43, air flow rate adjustment valve 45, mass air flow sensor 46 is connected to described master control borad 3, described Gas Pipe is also provided with nitrogen tube, described nitrogen tube is provided with nitrogen switch valve 6, described master control borad 3, according to the aperture of the corresponding gas consumption adjusting valve of gas-flow value adjustment combustion, carries out according to air-fuel ratio and gas-flow value the aperture adjusting air flow rate adjustment valve.In this preferred embodiment, arrange gas nozzle at roaster furnace bosh, jet expansion is along roaster horizontal tangent direction, and form of nozzle is with traditional regeneration of hydrochloric acid coal gas burner.
In order to make such scheme more clear, three specific embodiments are described below.
embodiment one:
Industrial smoke waste heat supply temperature about 780 DEG C, the heat demand that waste heat flue gas heat is maximum under can meeting roaster oepration at full load condition, flue-gas temperature also can meet the temperature (500-650 DEG C) in roaster required for decomposition reaction.
As shown in Figure 1, be used in spray roasting regeneration of hydrochloric acid roaster provide thermal source for realizing industrial exhaust heat, need tangentially arrange one or more waste heat flue gas nozzle at roaster furnace bosh, the flow velocity of waste heat flue gas nozzle is set to 20m/s, nozzle adopts tapering type, ecto-entad undergauge.Each waste heat flue gas nozzle is connected with waste heat for supplying pipe, waste heat for supplying pipe is provided with residual heat stream adjustable valve 22 and residual heat stream gauge 23 and waste heat switch valve 24, roaster furnace roof or furnace bosh position are provided with temperature sensor 11, under master control borad 3 controls, residual heat stream adjustable valve aperture and in-furnace temperature coordinated signals, to meet the temperature requirement under the various working condition of roaster.Unnecessary waste heat flue gas is discharged via residue fume emission control valve 5.
Native system control method is specific as follows:
Waste heat switch valve on S101, unlatching waste heat for supplying pipe and residual heat stream adjustable valve, and receive data on flows and the roaster in-furnace temperature data of waste heat flue gas;
S102, according to the roaster in-furnace temperature that detects according to the aperture controlling residual heat stream adjustable valve, make roaster in-furnace temperature reach temperature in roaster required for decomposition reaction.
embodiment two:
Industrial smoke waste heat supply temperature about 350 DEG C, the heat demand that waste heat flue gas heat is maximum under can meeting roaster oepration at full load condition, but flue-gas temperature can not meet the temperature (500-650 DEG C) in roaster required for decomposition reaction, the requirement of brown iron oxide quality can not be met simultaneously.
As shown in Figure 2, be used in spray roasting regeneration of hydrochloric acid roaster provide thermal source for realizing industrial exhaust heat, need tangentially arrange one or more waste heat flue gas nozzle at roaster furnace bosh, the flow velocity of waste heat flue gas nozzle is set to 25m/s, nozzle adopts tapering type, ecto-entad undergauge.Each waste heat flue gas nozzle is connected with waste heat for supplying pipe, and described waste heat for supplying pipe is provided with residual heat stream adjustable valve 22, residual heat stream gauge 23 and waste heat switch valve 24.For meeting the temperature in roaster required for decomposition reaction, need to adopt combustion gas (natural gas or liquefied gas, diesel oil, industrial combustion gas etc.) thermal source as a supplement, need to set up one or more gas nozzle, fuel burner nozzle is arranged at roaster furnace bosh, jet expansion is along roaster horizontal tangent direction, form of nozzle is with traditional regeneration of hydrochloric acid jet for gas, described gas nozzle 41 is connected with Gas Pipe and air delivery pipe, described Gas Pipe is provided with gas consumption adjusting valve 42, gas meter 43 and gas switch valve 44, described air delivery pipe is provided with air flow rate adjustment valve 45, mass air flow sensor 46 and combustion fan 47, described gas consumption adjusting valve 42, gas meter 43, air flow rate adjustment valve 45, mass air flow sensor 46 is connected to described master control borad 3.
For meeting the requirement of temperature requirement under the various working condition of roaster and brown iron oxide quality, native system control method is specific as follows:
Waste heat switch valve on S201, unlatching waste heat for supplying pipe and residual heat stream adjustable valve, and receive data on flows and the roaster in-furnace temperature data of waste heat flue gas;
S202, aperture according to the flow-control residual heat stream adjustable valve of current waste heat flue gas, make the flow value of current waste heat flue gas be adjusted to design discharge value gradually from initial flow value, roaster enters preliminarily stabilised state;
S203, light first gas nozzle, according to the aperture of the corresponding gas consumption adjusting valve of gas-flow value adjustment combustion received, carry out according to air-fuel ratio and gas-flow value the aperture adjusting air flow rate adjustment valve; If light first gas nozzle to reach and still do not reach design temperature in roaster stove, then light follow-up gas nozzle successively, until reach design temperature in roaster stove;
S204, reach in roaster stove after design temperature, roaster proceeds to the production phase, is discharged by waste heat flue gas unnecessary when normally producing via residue fume emission control valve.
In this method, first the waste heat switch valve on waste heat for supplying pipe and residual heat stream adjustable valve is opened, the now flow coordinated signals that exports of the aperture of residual heat stream adjustable valve and flowmeter, the aperture of adjustment residual heat stream adjustable valve, make residual heat stream gauge flow value be adjusted to design discharge value gradually from initial flow value, after this residual heat stream adjustable valve enters and in-furnace temperature coordinated signals; After roaster enters preliminarily stabilised state, then regeneration of hydrochloric acid coal gas burner ignition procedure traditionally lights first gas nozzle, the gas flow of gas nozzle and in-furnace temperature coordinated signals, the aperture of gas consumption adjusting valve regulates according to gas flow, and the aperture of air flow rate adjustment valve regulates according to air-fuel ratio and gas flow; When first gas nozzle stable operation, if first gas nozzle ability does not reach design temperature, then light follow-up gas nozzle successively, until reach design temperature; Last roaster proceeds to the production phase, and the gas flow of whole process gas nozzle carries out coordinated signals with in-furnace temperature all the time.Waste heat flue gas unnecessary when system is normally produced is discharged via residue fume emission control valve.
embodiment three:
Industrial smoke waste heat supply temperature about 700 DEG C, the heat demand that waste heat flue gas heat is maximum under can meeting roaster oepration at full load condition under normal circumstances, waste heat flue-gas temperature also can meet the temperature (500-650 DEG C) in roaster required for decomposition reaction, but it can not meet acid regeneration device roaster heating demand in section sometime.
As shown in Figure 2, under nominal situation condition, based on waste heat for supplying, outer combustion gas heat supply is auxiliary, under the condition that outside heat supply is interrupted completely, adopts complete heat source gas heat supply.Be used in spray roasting regeneration of hydrochloric acid roaster for realizing industrial exhaust heat thermal source is provided, one or more waste heat flue gas nozzle need be tangentially set at roaster furnace bosh, the flow velocity of waste heat flue gas nozzle is set to 15m/s, and nozzle generally adopts tapering type, ecto-entad undergauge.Each waste heat flue gas nozzle is connected with waste heat for supplying pipe, residual heat stream adjustable valve 22, residual heat stream gauge 23 and waste heat switch valve 24.
Under the operating mode that waste heat thermal source can not supply, such as waste heat for supplying system thermal is inadequate, or waste heat for supplying system malfunctions, for meeting the temperature required for calcination, need to adopt combustion gas (natural gas or liquefied gas, diesel oil, industrial combustion gas etc.) as thermal source, need to set up one or more gas nozzle, gas nozzle is arranged at roaster furnace bosh, gas nozzle outlet is along roaster horizontal tangent direction, form of nozzle is with traditional regeneration of hydrochloric acid coal gas burner, described gas nozzle 41 is connected with Gas Pipe and air delivery pipe, described Gas Pipe is provided with gas consumption adjusting valve 42, gas meter 43 and gas switch valve 44, described air delivery pipe is provided with air flow rate adjustment valve 45, mass air flow sensor 46 and combustion fan 47, described gas consumption adjusting valve 42, gas meter 43, air flow rate adjustment valve 45, mass air flow sensor 46 is connected to described master control borad 3.
For meeting the requirement of temperature requirement under the various working condition of roaster and brown iron oxide quality, native system control method comprises the steps:
Waste heat switch valve on S301, unlatching waste heat for supplying pipe and residual heat stream adjustable valve, and receive data on flows and the roaster in-furnace temperature data of waste heat flue gas;
S302, aperture according to the flow-control residual heat stream adjustable valve of current waste heat flue gas, make the flow value of current waste heat flue gas be adjusted to design discharge value gradually from initial flow value;
If S303 is after now roaster in-furnace temperature reaches design temperature, roaster proceeds to the production phase, is discharged by waste heat flue gas unnecessary when normally producing via residue fume emission control valve;
If S304 is waste heat for supplying system malfunctions now, light first gas nozzle, according to the aperture of the corresponding gas consumption adjusting valve of gas-flow value adjustment combustion received, the aperture adjusting air flow rate adjustment valve is carried out according to air-fuel ratio and gas-flow value, if light first gas nozzle to reach and still do not reach design temperature in roaster stove, then light follow-up gas nozzle successively, until reach design temperature in roaster stove;
After S305, roaster in-furnace temperature reach design temperature, roaster proceeds to the production phase, is discharged by waste heat flue gas unnecessary when normally producing via residue fume emission control valve.
In this control method, first the waste heat switch valve on waste heat for supplying pipe and residual heat stream adjustable valve is opened, now the aperture of residual heat stream adjustable valve and in-furnace temperature chain, and regulate according to setting flow value, if now waste heat flue gas nozzle can meet design temperature in stove, then system is run according to the state of embodiment one, if can not meet, regeneration of hydrochloric acid coal gas burner ignition procedure traditionally lights first gas nozzle, the gas flow of gas nozzle and in-furnace temperature coordinated signals, the aperture of gas consumption adjusting valve regulates according to gas flow, the aperture of air flow rate adjustment valve regulates according to air-fuel ratio and gas flow, if first gas nozzle ability does not reach design temperature in stove, then light follow-up gas nozzle successively, until reach design temperature in stove, last roaster proceeds to the production phase, and the gas flow of whole process gas nozzle carries out coordinated signals with in-furnace temperature all the time.Waste heat flue gas unnecessary when system is normally produced is discharged via residue fume emission control valve.If outside waste heat thermal source can not supply, then directly light gas nozzle, make in-furnace temperature reach reaction temperature.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. one kind utilizes industrial exhaust heat to carry out hydrochloride waste spray roasting system, it is characterized in that, described system comprises roaster, a waste heat flue gas nozzle is at least provided with along described roaster furnace bosh tangential direction, each waste heat flue gas nozzle is connected to waste heat for supplying system by waste heat for supplying Guan Jun, described waste heat for supplying pipe is provided with residual heat stream adjustable valve, residual heat stream gauge and waste heat switch valve, described system comprises master control borad, furnace roof or the furnace bosh position of described roaster are provided with temperature sensor, described master control borad and described temperature sensor, residual heat stream adjustable valve is connected with residual heat stream gauge, described master control borad is for receiving data on flows and the roaster in-furnace temperature data of waste heat flue gas, and the aperture of residual heat stream adjustable valve is controlled according to the data on flows of the roaster in-furnace temperature detected and/or current waste heat flue gas.
2. system as claimed in claim 1, it is characterized in that, a gas nozzle is also at least provided with along described roaster furnace bosh tangential direction, described gas nozzle is connected with Gas Pipe and air delivery pipe, described Gas Pipe is provided with gas consumption adjusting valve, gas meter and gas switch valve, described air delivery pipe is provided with air flow rate adjustment valve, mass air flow sensor and combustion fan, described gas consumption adjusting valve, gas meter, air flow rate adjustment valve, mass air flow sensor is connected to described master control borad, described master control borad is according to the aperture of the corresponding gas consumption adjusting valve of gas-flow value adjustment combustion, the aperture adjusting air flow rate adjustment valve is carried out according to air-fuel ratio and gas-flow value.
3. system as claimed in claim 1, it is characterized in that, described waste heat for supplying pipe is also connected with smoke discharge pipe, and described smoke discharge pipe is provided with residue fume emission control valve.
4. system as claimed in claim 2, it is characterized in that, described Gas Pipe is also provided with nitrogen tube, and described nitrogen tube is provided with nitrogen switch valve.
5. system as described in any one of claim 1-4, is characterized in that, described waste heat flue gas nozzle is tapering type structure, ecto-entad undergauge.
6. system as claimed in claim 5, it is characterized in that, the flow velocity of described waste heat flue gas nozzle is 10 ~ 25m/s.
7. utilize industrial exhaust heat to carry out a control method for hydrochloride waste spray roasting, it is characterized in that, described method comprises:
Open the waste heat switch valve on waste heat for supplying pipe and residual heat stream adjustable valve, and receive data on flows and the roaster in-furnace temperature data of waste heat flue gas;
Control the aperture of residual heat stream adjustable valve according to the data on flows of the roaster in-furnace temperature detected and/or current waste heat flue gas, make roaster in-furnace temperature reach temperature in roaster required for decomposition reaction.
8. method as claimed in claim 7, it is characterized in that, the data on flows of the roaster in-furnace temperature that described basis detects and/or current waste heat flue gas controls the aperture of residual heat stream adjustable valve, make roaster in-furnace temperature reach temperature step in roaster required for decomposition reaction, specifically comprise:
According to the roaster in-furnace temperature detected according to the aperture controlling residual heat stream adjustable valve, roaster in-furnace temperature is made to reach temperature in roaster required for decomposition reaction.
9. method as claimed in claim 7, it is characterized in that, the data on flows of the roaster in-furnace temperature that described basis detects and/or current waste heat flue gas controls the aperture of residual heat stream adjustable valve, make roaster in-furnace temperature reach temperature step in roaster required for decomposition reaction, specifically comprise:
According to the aperture of the flow-control residual heat stream adjustable valve of current waste heat flue gas, make the flow value of current waste heat flue gas be adjusted to design discharge value gradually from initial flow value, roaster enters preliminarily stabilised state;
Light first gas nozzle, according to the aperture of the corresponding gas consumption adjusting valve of gas-flow value adjustment combustion received, carry out according to air-fuel ratio and gas-flow value the aperture adjusting air flow rate adjustment valve; If light first gas nozzle to reach and still do not reach design temperature in roaster stove, then light follow-up gas nozzle successively, until reach design temperature in roaster stove;
Reach in roaster stove after design temperature, roaster proceeds to the production phase, is discharged by waste heat flue gas unnecessary when normally producing via residue fume emission control valve.
10. method as claimed in claim 7, it is characterized in that, the data on flows of the roaster in-furnace temperature that described basis detects and/or current waste heat flue gas controls the aperture of residual heat stream adjustable valve, make roaster in-furnace temperature reach temperature step in roaster required for decomposition reaction, specifically comprise:
According to the aperture of the flow-control residual heat stream adjustable valve of current waste heat flue gas, the flow value of current waste heat flue gas is made to be adjusted to design discharge value gradually from initial flow value;
If after now roaster in-furnace temperature reaches design temperature, roaster proceeds to the production phase, waste heat flue gas unnecessary when normally producing is discharged via residue fume emission control valve;
If now waste heat for supplying system malfunctions, light first gas nozzle, according to the aperture of the corresponding gas consumption adjusting valve of gas-flow value adjustment combustion received, the aperture adjusting air flow rate adjustment valve is carried out according to air-fuel ratio and gas-flow value, if light first gas nozzle to reach and still do not reach design temperature in roaster stove, then light follow-up gas nozzle successively, until reach design temperature in roaster stove;
After roaster in-furnace temperature reaches design temperature, roaster proceeds to the production phase, is discharged by waste heat flue gas unnecessary when normally producing via residue fume emission control valve.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862053A (en) * | 2016-04-06 | 2016-08-17 | 中冶南方工程技术有限公司 | Regeneration method and system for hydrochloric acid waste liquid |
| EP3056577A1 (en) * | 2015-02-13 | 2016-08-17 | Siemens Aktiengesellschaft | A reactor for leaching of rare earth containing material |
| CN105865217A (en) * | 2016-04-21 | 2016-08-17 | 中冶南方工程技术有限公司 | Control method of gas flow of burner nozzle for baking furnace |
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| CN109205561A (en) * | 2018-09-25 | 2019-01-15 | 李晓垚 | A kind of industrial concentrating hydrochloric acid recovery method |
| CN112762714A (en) * | 2020-12-31 | 2021-05-07 | 重庆长江造型材料（集团）股份有限公司 | Combustion control method of fluidized roasting furnace |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3056577A1 (en) * | 2015-02-13 | 2016-08-17 | Siemens Aktiengesellschaft | A reactor for leaching of rare earth containing material |
| CN105862053A (en) * | 2016-04-06 | 2016-08-17 | 中冶南方工程技术有限公司 | Regeneration method and system for hydrochloric acid waste liquid |
| CN105887108A (en) * | 2016-04-06 | 2016-08-24 | 中冶南方工程技术有限公司 | Hydrochloric acid waste liquid regenerating method and system |
| CN105887108B (en) * | 2016-04-06 | 2018-12-07 | 中冶南方工程技术有限公司 | Hydrochloric acid exhausted liquid reclaiming process and system |
| CN105865217A (en) * | 2016-04-21 | 2016-08-17 | 中冶南方工程技术有限公司 | Control method of gas flow of burner nozzle for baking furnace |
| CN105865217B (en) * | 2016-04-21 | 2018-03-13 | 中冶南方工程技术有限公司 | A kind of roaster burner gas flow control method |
| CN109205561A (en) * | 2018-09-25 | 2019-01-15 | 李晓垚 | A kind of industrial concentrating hydrochloric acid recovery method |
| CN112762714A (en) * | 2020-12-31 | 2021-05-07 | 重庆长江造型材料（集团）股份有限公司 | Combustion control method of fluidized roasting furnace |
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