CN214747306U - Heat exchange device for coal gas diffused by metallurgical converter - Google Patents
Heat exchange device for coal gas diffused by metallurgical converter Download PDFInfo
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- CN214747306U CN214747306U CN202120674321.5U CN202120674321U CN214747306U CN 214747306 U CN214747306 U CN 214747306U CN 202120674321 U CN202120674321 U CN 202120674321U CN 214747306 U CN214747306 U CN 214747306U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The utility model discloses a metallurgical converter diffuses coal gas heat transfer device, including setting up the CO concentration detector on the gas line that is used for carrying the coal gas after removing dust, the exit end of gas line is led to and is had a three-way valve, and an exit end of three-way valve is connected with the gas holder through the pipeline, and another exit end of three-way valve is connected with the combustion chamber through the pipeline, and the high temperature flue gas exit end of combustion chamber connects gradually draught fan and chimney through the pipeline, wherein, there is heat transfer device through the pipe connection between combustion chamber and the draught fan; a snakelike water pipe is arranged inside the heat exchange device, two ends of the snakelike water pipe are respectively connected with the heat accumulator through a cold water pipe and a hot water pipe, and a pump is arranged on the cold water pipe; the device also comprises a PLC controller used for controlling the gas flow direction, the flue gas flow rate and the water flow speed. The utility model discloses not only can prevent that the high temperature flue gas from causing the pollution to the environment, can also retrieve the heat that the burning of diffused gas produced.
Description
Technical Field
The utility model relates to a diffuse coal gas processing technology field, concretely relates to a heat transfer device for metallurgical converter diffuses coal gas.
Background
When the converter blows, a large amount of coal gas containing high-concentration CO is generated, the temperature reaches 1400 ℃ and 1600 ℃, the coal gas content reaches 60-85%, and the coal gas enters a gas chamber for production and use after being cooled and dedusted. However, in the converter in the pre-burning period and the post-burning period, the content of CO is low, the volume content is lower than 30%, the duration is about 10min, and the coal gas in the period can not enter a gas holder because the content of CO can not reach the recoverable condition, and the coal gas is usually diffused through a switching valve. In the process of diffusion, in order to prevent the environment from being polluted, CO is ignited at the tail end of the chimney to form a torch, and a large amount of heat generated during the combustion of coal gas is directly discharged into the atmosphere along with the flue gas, so that the mode not only causes energy waste, but also does not meet the requirement of environmental protection. Therefore, it is an urgent need to solve the problem of the present technology to provide a device for recovering the heat released by the burning of the released gas.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a heat exchange device for the diffused gas of a metallurgical converter, which can recover the heat released after the diffused gas is combusted.
In order to solve the technical problem, the utility model adopts the following technical proposal.
A heat exchange device for the diffused gas of a metallurgical converter comprises a CO concentration detector arranged on a gas pipeline used for conveying the dedusted gas, wherein the outlet end of the gas pipeline is communicated with a three-way valve used for controlling the flow direction of the gas, one outlet end of the three-way valve is connected with a gas cabinet used for storing the gas with the CO concentration meeting the requirement through a pipeline, the other outlet end of the three-way valve is connected with a combustion chamber used for igniting the diffused gas with the CO concentration not meeting the requirement through a pipeline, the high-temperature flue gas outlet end of the combustion chamber is sequentially connected with an induced draft fan and a chimney through pipelines, and a heat exchange device used for recovering the waste heat of the high-temperature flue gas is connected between the combustion chamber and the induced draft fan through a pipeline; a snakelike water pipe is arranged inside the heat exchange device, two ends of the snakelike water pipe are respectively connected with the heat accumulator through a cold water pipe and a hot water pipe, and a pump for pumping cold water into the snakelike water pipe is arranged on the cold water pipe; the equipment also comprises a PLC controller used for controlling the gas flow direction, the flue gas flow velocity and the water flow velocity, the input end of the PLC controller is connected with the output end of the CO concentration detector, and the output end of the PLC controller is respectively connected with the controlled ends of the three-way valve, the induced draft fan and the pump.
Preferably, a burner for igniting and diffusing coal gas is arranged in the combustion chamber, and the controlled end of the burner is connected with the output end of the PLC; the combustion chamber is communicated with a blower for blowing air into the combustion chamber through an opened air inlet, and the controlled end of the blower is connected with the output end of the PLC.
Preferably, a flue gas velocity meter for detecting the velocity of the high-temperature flue gas is arranged on a pipeline connected with the high-temperature flue gas inlet end of the heat exchange device, and the output end of the flue gas velocity meter is connected with the input end of the PLC.
Preferably, the cold water pipe is provided with a flowmeter for detecting the flow rate of heat exchange cold water, and the output end of the flowmeter is connected with the input end of the PLC.
Preferably, a temperature sensor for detecting the temperature of the flue gas after heat exchange is arranged on a pipeline connected with the low-temperature flue gas outlet end of the heat exchange device, and the output end of the temperature sensor is connected with the input end of the PLC.
Due to the adoption of the technical scheme, the utility model has the following technical progress.
The utility model discloses a set up heat transfer recovery unit behind diffusing gas combustion device, not only can prevent that the high temperature flue gas from causing the pollution to the environment, can also retrieve the heat that diffuses the gas combustion production, and then produce a large amount of hot water that can be used for as life hot water or be used for the heating.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein: 1. the system comprises a gas pipeline, 2 CO concentration detectors, 3 three-way valves, 4 gas chambers, 5 combustion chambers, 6 blowers, 7 burners, 8 heat exchange devices, 81 serpentine water pipes, 9 heat accumulators, 10 cold water pipes, 11 hot water pipes, 12 pump machines, 13 draught fans, 14 chimneys, 15 flue gas flow rate meters, 16 flow meters and 17 temperature sensors.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A heat exchange device for the diffused gas of a metallurgical converter is shown in a combined figure 1 and comprises a combustion chamber 5, a heat exchange device 8, an induced draft fan 13, a chimney 14 and a PLC (programmable logic controller) which are sequentially connected with a gas pipeline 1 through pipelines and are used for controlling the process of the diffused heat exchange. The heat exchange device 8 is used for cooling and exchanging heat for high-temperature flue gas generated after the diffused coal gas is ignited for recycling, and the induced draft fan 13 is used for introducing the cooled flue gas into the chimney 14 for discharging.
The gas pipeline 1 is provided with a CO concentration detector 2, the CO concentration detector 2 is used for detecting the CO concentration of the dedusted gas conveyed in the gas pipeline 1, and the output end of the CO concentration detector 2 is connected with the input end of the PLC. The outlet end of the gas pipeline 1 is connected with a three-way valve 3, and the three-way valve 3 is used for controlling the flow direction of gas. One outlet end of the three-way valve 3 is connected with a gas tank 4 through a pipeline, and the gas tank 4 is used for storing gas with CO concentration meeting the requirement; the other outlet end of the three-way valve 3 is connected with a combustion chamber 5 through a pipeline, the combustion chamber 5 is used for igniting the diffused coal gas of which the CO concentration does not meet the requirement, and the controlled end of the three-way valve 3 is connected with the output end of the PLC.
The combustor 7 is arranged in the combustion chamber 5, the combustor 7 is used for igniting and diffusing coal gas, and the controlled end of the combustor 7 is connected with the output end of the PLC. The combustion chamber 5 is communicated with a blower 6 through an opened air inlet, and the blower 6 is used for blowing air into the combustion chamber 5, so that the burner 7 is ignited to diffuse the gas for air distribution, and the complete combustion of the diffused gas is facilitated. The controlled end of the blower 6 is connected with the output end of the PLC controller.
Heat transfer device 8's inside is provided with snakelike water pipe 81, and snakelike water pipe 81 helps increasing the area of contact of heat transfer cold water and high temperature flue gas. Two ends of the snakelike water pipe 81 are respectively connected with a heat accumulator 9 through a cold water pipe 10 and a hot water pipe 11, the heat accumulator 9 overcomes the defect of periodic diffusion and combustion of converter gas, and hot water can be continuously and stably supplied to the outside. A pump 12 and a flowmeter 16 are arranged on the cold water pipe 10, the pump 12 is used for pumping cold water into the snakelike water pipe 81 for heat exchange, and the controlled end of the pump 12 is connected with the output end of the PLC; the flowmeter 16 is used for detecting the flow of heat exchange cold water, and the output end of the flowmeter 16 is connected with the input end of the PLC controller.
Be provided with flue gas velocity of flow meter 15 on the pipeline that heat transfer device 8's high temperature flue gas entry end is connected, flue gas velocity of flow meter 15 is used for detecting the velocity of flow of high temperature flue gas, and the input of PLC controller is connected to the output of flue gas velocity of flow meter 15.
A temperature sensor 17 is arranged on a pipeline connected with the low-temperature flue gas outlet end of the heat exchange device 8, the temperature sensor 17 is used for detecting the flue gas temperature after heat exchange, and the output end of the temperature sensor 17 is connected with the input end of the PLC.
The induced draft fan 13 is used for introducing the flue gas after the cooling into the chimney 14 and discharging, and the controlled end of the induced draft fan 13 is connected with the output end of the PLC controller.
The PLC controls the switching of the three-way valve 3 and controls the opening and closing of the blower 6, the burner 7, the pump 12 and the induced draft fan 13 according to the detected CO concentration information transmitted by the CO concentration detector 2; the PLC monitors the current flue gas flow velocity, the current water flow velocity and the flue gas temperature information after heat exchange according to a flue gas flow velocity meter 15, a flow meter 16 and a temperature sensor 17, and adjusts the water flow velocity and the flue gas flow velocity through an adjusting pump 12 and an induced draft fan 13, so that the flue gas temperature after cooling is adjusted.
When the utility model is used, the three-way valve 3 is controlled to switch according to the CO concentration in the coal gas, and when the CO concentration in the coal gas is higher than a set value, the coal gas enters the coal gas cabinet 4 to be stored; when the concentration of CO is lower than a set value, the coal gas enters the combustion chamber 5 for combustion, and the high-temperature flue gas after combustion enters the heat exchange device 8 for heat exchange and is then introduced into a chimney 14 through an induced draft fan 13 for discharge.
Claims (5)
1. Metallurgical converter diffuses coal gas heat transfer device, including setting up CO concentration detection appearance (2) on gas pipeline (1) that is used for carrying dust removal back coal gas, the exit end switch-on of gas pipeline (1) has three-way valve (3) that are used for controlling the coal gas flow direction, an exit end of three-way valve (3) has gas chamber (4) that are used for storing the coal gas that CO concentration satisfies the requirements through the pipe connection, another exit end of three-way valve (3) has combustion chamber (5) that are used for lighting the unsatisfied requirement of the diffusion coal gas of CO concentration through the pipe connection, the high temperature flue gas exit end of combustion chamber (5) connects gradually draught fan (13) and chimney (14) through the pipeline, its characterized in that: a heat exchange device (8) for recovering waste heat of the high-temperature flue gas is connected between the combustion chamber (5) and the induced draft fan (13) through a pipeline; a snakelike water pipe (81) is arranged in the heat exchange device (8), two ends of the snakelike water pipe (81) are respectively connected with the heat accumulator (9) through a cold water pipe (10) and a hot water pipe (11), and a pump (12) for pumping cold water into the snakelike water pipe (81) is arranged on the cold water pipe (10); the device also comprises a PLC controller used for controlling the gas flow direction, the flue gas flow speed and the water flow speed, the input end of the PLC controller is connected with the output end of the CO concentration detector (2), and the output end of the PLC controller is respectively connected with the controlled ends of the three-way valve (3), the induced draft fan (13) and the pump (12).
2. The metallurgical converter bleed gas heat exchange device of claim 1, wherein: a combustor (7) for igniting and diffusing coal gas is arranged in the combustion chamber (5), and the controlled end of the combustor (7) is connected with the output end of the PLC; the combustion chamber (5) is communicated with a blower (6) used for blowing air into the combustion chamber (5) through an opened air inlet, and the controlled end of the blower (6) is connected with the output end of the PLC.
3. The metallurgical converter bleed gas heat exchange device of claim 1, wherein: a flue gas velocity meter (15) used for detecting the velocity of high-temperature flue gas is arranged on a pipeline connected with the high-temperature flue gas inlet end of the heat exchange device (8), and the output end of the flue gas velocity meter (15) is connected with the input end of the PLC.
4. The metallurgical converter bleed gas heat exchange device of claim 1, wherein: the cold water pipe (10) is provided with a flowmeter (16) for detecting the flow rate of heat exchange cold water, and the output end of the flowmeter (16) is connected with the input end of the PLC controller.
5. The metallurgical converter bleed gas heat exchange device of claim 1, wherein: a temperature sensor (17) used for detecting the temperature of flue gas after heat exchange is arranged on a pipeline connected with the low-temperature flue gas outlet end of the heat exchange device (8), and the output end of the temperature sensor (17) is connected with the input end of the PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120674321.5U CN214747306U (en) | 2021-04-02 | 2021-04-02 | Heat exchange device for coal gas diffused by metallurgical converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120674321.5U CN214747306U (en) | 2021-04-02 | 2021-04-02 | Heat exchange device for coal gas diffused by metallurgical converter |
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| CN214747306U true CN214747306U (en) | 2021-11-16 |
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| CN202120674321.5U Active CN214747306U (en) | 2021-04-02 | 2021-04-02 | Heat exchange device for coal gas diffused by metallurgical converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116753528A (en) * | 2023-08-18 | 2023-09-15 | 河北富莱尔环保节能工程有限公司 | Converter gas high-efficiency utilization and power generation system |
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2021
- 2021-04-02 CN CN202120674321.5U patent/CN214747306U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116753528A (en) * | 2023-08-18 | 2023-09-15 | 河北富莱尔环保节能工程有限公司 | Converter gas high-efficiency utilization and power generation system |
| CN116753528B (en) * | 2023-08-18 | 2023-11-21 | 河北富莱尔环保节能工程有限公司 | Converter gas high-efficiency utilization and power generation system |
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