CN114058774B - Combustion system for recovering converter gas - Google Patents
Combustion system for recovering converter gas Download PDFInfo
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- CN114058774B CN114058774B CN202111325957.XA CN202111325957A CN114058774B CN 114058774 B CN114058774 B CN 114058774B CN 202111325957 A CN202111325957 A CN 202111325957A CN 114058774 B CN114058774 B CN 114058774B
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- converter gas
- control device
- electromagnetic valve
- combustion
- interface
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C2100/00—Exhaust gas
- C21C2100/02—Treatment of the exhaust gas
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C2100/00—Exhaust gas
- C21C2100/06—Energy from waste gas used in other processes
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- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to the technical field of steel making, in particular to a combustion system for recycling converter gas. The combustion system for recovering converter gas mainly comprises: a combustion device and a control device. Wherein the combustion device is configured to burn converter gas, the control device is connected with the combustion device, and the control device controls the converter gas to enter or block the combustion device. The control device includes a first solenoid valve and a second solenoid valve. The first electromagnetic valve can be opened at a first preset time so that converter gas enters the accommodating cavity, the first electromagnetic valve can be closed at a second preset time so as to block the converter gas from entering the accommodating cavity, the second electromagnetic valve can be opened at a third preset time so that the converter gas enters the combustion device, and the second electromagnetic valve can be closed at a fourth preset time. The combustion system for recycling the converter gas has a simple structure, can avoid the converter gas from deflagrating in the combustion device, and further improves the reliability and the safety of the combustion system for recycling the converter gas.
Description
Technical Field
The invention relates to the technical field of steel making, in particular to a combustion system for recycling converter gas.
Background
The converter gas generated in the steelmaking process can be used as secondary energy, and has extremely important significance for the development of energy-saving and consumption-reducing work of iron and steel enterprises in China by recycling and utilizing the converter gas.
In the operation process of steel enterprises, on one hand, when converter gas (LDG) is used for converter steelmaking, an oxygen lance extends to a proper position away from the upper part of molten iron from the upper part of a furnace mouth, oxygen is vigorously stirred with the molten iron in a molten pool at a certain pressure, and then reacts with elements such as carbon in the molten iron to form the converter gas. Because of the particularly high temperature of converter steelmaking, carbon in the molten iron reacts with the oxygen gas being blown in to produce carbon monoxide and carbon dioxide gas, and this gas mixture is called converter gas (LDG). The converter gas has a particularly high calorific value, and as an important accessory product in steelmaking, the converter gas also has a relatively high value and can use the calorific value contained in the converter gas; on the other hand, since the converter gas contains a relatively high proportion of carbon monoxide gas, if the converter gas is directly discharged into the air, the carbon monoxide gas contained in the converter gas is wasted and causes serious environmental pollution.
In the prior art, in the initial stage and the final stage of steel making, because the oxygen content in the generated converter gas does not reach the standard, the dangerous phenomenon of deflagration often appears when the converter gas is recovered, the potential safety hazard of a combustion system is greatly increased, and in addition, some users directly send the converter gas to a diffusion torch to diffuse the ignition in order to avoid the deflagration of the converter gas, so that the serious waste of the converter gas is caused, and the cost is increased.
Therefore, it is desirable to design a combustion system for recycling converter gas to solve the above technical problems in the prior art.
Disclosure of Invention
The invention aims to provide a combustion system for recovering converter gas, which has a simple structure, can effectively recover sensible heat and combustion heat of the converter gas, saves the cost, and can prevent the converter gas from deflagration in the combustion process, thereby improving the reliability and safety of the combustion system for recovering the converter gas.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a combustion system for recovering converter gas, which comprises:
a combustion device configured to combust converter gas;
the first end of the control device is used for introducing the converter gas, the second end of the control device is connected with the combustion device, and the control device is used for controlling the converter gas to enter the combustion device or blocking the converter gas from entering the combustion device;
the control device comprises a first electromagnetic valve and a second electromagnetic valve, the first electromagnetic valve is arranged at the upstream end of the second electromagnetic valve along the flowing direction of the converter coal gas, and the inner walls of the first electromagnetic valve, the second electromagnetic valve and the control device can form a closed accommodating cavity;
the first electromagnetic valve can be opened at first preset time so that the converter gas enters the accommodating cavity, the first electromagnetic valve can be closed at second preset time so as to block the converter gas from entering the accommodating cavity, the second electromagnetic valve can be opened at third preset time so that the converter gas enters the combustion device, and the second electromagnetic valve can be closed at fourth preset time so as to prevent the converter gas in the combustion device from flowing back to the accommodating cavity.
As an alternative, the control device comprises a piston arranged on the inner wall of the housing chamber, the piston being configured to drive the converter gas into the combustion device.
As an alternative, the piston comprises a connecting rod and a drive plate, one end of the connecting rod being connected to the drive plate and the other end extending out of the control device.
As an alternative, the piston comprises a drive means, which is fixedly connected to the end of the connecting rod that protrudes from the control means.
As an alternative, the combustion system for recycling converter gas further comprises a nitrogen tank filled with nitrogen, and the nitrogen tank is connected with the control device so that the nitrogen can fill the accommodating cavity before the first electromagnetic valve is opened.
As an alternative scheme, the combustion system for recycling converter gas further comprises a four-way valve, the four-way valve is provided with an interface a and an interface b, the interface a is connected with the top of the control device, and the interface b is connected with the nitrogen tank.
As an alternative, the four-way valve is further provided with a c interface and a d interface, the c interface is connected with the bottom end of the side wall of the control device, and the d interface is connected to the external atmosphere environment.
As an alternative, a first interface is arranged at the top of the control device, and the first interface is communicated with the interface a; and a second interface is arranged at the bottom end of the side wall of the control device, the second interface is communicated with the interface c, and the height of the second interface is higher than that of the second electromagnetic valve along the gravity direction.
As an alternative, the combustion system for recycling converter gas further comprises a converter gas storage device, and the converter gas storage device is connected with the first end of the control device, so that the converter gas can enter the combustion device through the control device.
Alternatively, the control device is provided in plurality, and the plurality of control devices are provided at equal intervals.
The invention has the beneficial effects that: the invention provides a combustion system for recycling converter gas, which is characterized in that the converter gas can intermittently enter the combustion system in batches by taking the opening and closing of a first electromagnetic valve and a second electromagnetic valve as a cycle period, namely the first preset time to the fourth preset time as the cycle period, so that the risk of deflagration of the converter gas caused by that a large amount of converter gas enters the combustion system at one time is avoided. Thereby improving the safety performance of the combustion system for recovering the converter gas and achieving the purposes of saving the cost and protecting the environment.
Drawings
FIG. 1 is a schematic structural diagram of a combustion system for recovering converter gas according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a control device according to an embodiment of the present invention at a first preset time;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
fig. 4 is a schematic structural diagram of the control device according to the embodiment of the present invention at a second preset time;
fig. 5 is a schematic structural diagram of the control device according to the embodiment of the present invention at a third preset time;
fig. 6 is a schematic structural diagram of a control device according to an embodiment of the present invention at a fourth preset time;
fig. 7 is a schematic structural diagram of the control device provided by the embodiment of the invention when the converter gas does not enter the accommodating cavity.
Reference numerals
1. A combustion device;
2. a control device; 21. a first solenoid valve; 22. a second solenoid valve; 23. an accommodating chamber; 24. a piston; 241. a connecting rod; 242. a drive plate; 243. a drive device; 25. a first interface; 26. a second interface; 27. an air inlet; 28. an air outlet;
3. a nitrogen tank; 4. a four-way valve; 5. converter gas storage device.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
At present, converter gas is widely applied to the production process of high value-added products as an important chemical raw material, economic benefits and environmental protection benefits are obvious, and at present, converter gas is also recycled and utilized by iron and steel enterprises and is applied to numerous fields as a fuel, so that the recycling of the converter gas has extremely important significance. Whether the converter gas can be safely recovered is limited by the way that the converter gas enters the combustion system, however, the converter gas is directly added into the combustion system in the prior art for recovery of the converter gas, so that the potential safety hazard of converter gas explosion is very easy to occur.
Therefore, the technical problem that the safety and the reliability of a combustion system are reduced due to the fact that the converter gas is easy to explode during recycling in the prior art is solved. As shown in fig. 1 to 2, the present embodiment provides a combustion system for recovering converter gas, which mainly includes: a combustion device 1 and a control device 2. Wherein the combustion device 1 is configured to combust converter gas, a first end of the control device 2 is used for introducing converter gas, and a second end of the control device 2 is connected with the combustion device 1, so that the control device 2 controls the converter gas to enter the combustion device 1 or blocks the converter gas from entering the combustion device 1.
Further, as shown in fig. 2, 4-7, the control device 2 includes an air inlet 27, a first electromagnetic valve 21 disposed on the air inlet 27, an air outlet 28, and a second electromagnetic valve 22 disposed on the air outlet 28, and the first electromagnetic valve 21, the second electromagnetic valve 22, and the inner wall of the control device 2 form a closed accommodating chamber 23. The first electromagnetic valve 21 can be opened at a first preset time to enable the converter gas to enter the accommodating cavity 23, the first electromagnetic valve 21 can be closed at a second preset time to block the converter gas from entering the accommodating cavity 23, the second electromagnetic valve 22 can be opened at a third preset time to enable the converter gas to enter the combustion device 1, and the second electromagnetic valve 22 can be closed at a fourth preset time to prevent the converter gas in the combustion device 1 from flowing back to the accommodating cavity 23.
Furthermore, along the flowing direction of the converter gas, the first electromagnetic valve 21 is disposed at the upstream end of the second electromagnetic valve 22, and both the first electromagnetic valve 21 and the second electromagnetic valve 22 are electrically connected to an external sensor, so that a user can set a certain computer program on the sensor to further control the opening and closing of the first electromagnetic valve 21 and the second electromagnetic valve 22. Illustratively, at a first preset time, the sensor can transmit an electric signal for opening the first electromagnetic valve 21 to the first electromagnetic valve 21, so that the first electromagnetic valve 21 can be opened, and thus converter gas can enter the accommodating cavity 23; then, at certain time intervals, that is, at a second preset time, the sensor transmits an electric signal for closing the first electromagnetic valve 21 to the first electromagnetic valve 21, so that the first electromagnetic valve 21 is closed, and at this time, the containing cavity 23 is filled with converter gas; then, at certain intervals, that is, at a third preset time, the sensor transmits an electric signal for opening the second electromagnetic valve 22 to the second electromagnetic valve 22, so that the second electromagnetic valve 22 can be opened, and thus, converter gas in the accommodating cavity 23 enters the combustion system; then, when a certain time is set, that is, a fourth preset time is set, the sensor transmits an electric signal for closing the second electromagnetic valve 22 to the second electromagnetic valve 22, so that the second electromagnetic valve 22 can be closed, the converter gas in the accommodating chamber 23 completely enters the combustion system, and thus the gas inlet 27 and the gas outlet 28 are separated by the accommodating chamber 23 without the converter gas, and the combustion system is prevented from being directly connected and contacted with the converter gas in the gas inlet 27, so that the safety performance of the combustion system is improved.
Compared with the prior art, in the embodiment, the converter gas can intermittently enter the combustion system in batches by opening and closing the first electromagnetic valve 21 and the second electromagnetic valve 22 to form a cycle period, that is, by using the first preset time to the fourth preset time to form a cycle period, so that the risk that the converter gas knocks because a large amount of converter gas enters the combustion system at one time is avoided. Thereby improving the safety performance of the combustion system for recovering the converter gas and achieving the purposes of saving the cost and protecting the environment.
As shown in fig. 2, in the present embodiment, the control device 2 comprises a piston 24, the piston 24 is arranged on the inner wall of the accommodating cavity 23, and the piston 24 is configured to drive the converter gas into the combustion device 1.
The piston 24 is electrically connected to a sensor, and when the piston 24 is in a retracted state at a first preset time, that is, the piston 24 is away from the combustion device 1, so that the converter gas at the gas inlet 27 enters the accommodating chamber 23. When the time is in the third preset time, the sensor can feed back the electric signal to the piston 24, so that the piston 24 can move towards the direction close to the combustion system, so that the piston 24 can drive the converter gas in the accommodating cavity 23 to rapidly enter the combustion system, thereby being beneficial to improving the efficiency of the converter gas entering the combustion system, meanwhile, the arrangement of the piston 24 can also enable the converter gas in the accommodating cavity 23 to completely enter the combustion system in the single cycle process, and further the accommodating cavity 23 has the effect of blocking the communication between the combustion system and the converter gas in the gas inlet 27, thereby improving the safety performance of the combustion system for recovering the converter gas, saving the cost and improving the working efficiency.
As shown in fig. 2, in the present embodiment, the piston 24 includes a connecting rod 241, a driving plate 242, and a driving device 243, one end of the connecting rod 241 is connected to the driving plate 242, the other end extends out of the control device 2, and the driving device 243 is fixedly connected to one end of the connecting rod 241 extending out of the control device 2.
Further, the sensor is electrically connected to the driving device 243 of the piston 24, and at a third preset time, the sensor feeds back an electric signal for driving the piston 24 to the driving device 243, so that the driving device 243 can drive the connecting rod 241 to move towards the direction close to the combustion device 1, and the driving plate 242 pushes the converter gas in the accommodating cavity 23 into the combustion device 1.
Preferably, the inner diameter of the driving plate 242 is slightly smaller than the inner diameter of the accommodating cavity 23, which is beneficial to the driving plate 242 to be driven by the driving device 243 to move flexibly and effectively inside the accommodating cavity 23, so as to avoid the driving plate 242 from generating friction collision with the inner wall of the accommodating cavity 23, and improve the smoothness of the movement of the piston 24. Meanwhile, in order to improve the sealing performance between the driving plate 242 and the accommodating cavity 23 and prevent converter gas in the accommodating cavity 23 from entering the combustion device 1 along a gap in the inner wall of the accommodating cavity 23, a user may further install a sealing ring on the peripheral side of the driving plate 242, the sealing ring is attached to the inner wall of the accommodating cavity 23, and the driving plate 242 can drive the sealing ring to move along the inner wall of the accommodating cavity 23 under the driving of the driving device 243, so as to improve the working efficiency of driving the converter gas by the piston 24. The connecting rod 241 can facilitate the driving plate 242 to realize the reset function, and the area of the end of the driving device 243 connected with the connecting rod 241 is larger than the area of the end of the connecting rod 241, so that the connecting rod 241 can be prevented from falling into the accommodating cavity 23 when the connecting rod 241 moves towards the direction close to the combustion device 1, and the driving device 243 can also play a limiting role on the connecting rod 241.
As shown in fig. 1 to 2, in the present embodiment, the combustion system for recovering converter gas further comprises a nitrogen tank 3 filled with nitrogen gas, and the nitrogen tank 3 is connected to the control device 2 so that the nitrogen gas can fill the holding chamber 23 before the first electromagnetic valve 21 is opened.
Further, nitrogen is a chemically stable, colorless, odorless, nonflammable, and inexpensive gas that is not susceptible to chemical reactions with other substances, and therefore nitrogen is selected as the shielding gas for the combustion system for recovering converter gas in this embodiment. When the time is preset for the fourth time, the first electromagnetic valve 21 and the second electromagnetic valve 22 are both in a closed state, and at the time, nitrogen is introduced into the accommodating cavity 23, so that the accommodating cavity 23 filled with nitrogen can block the converter gas of the combustion device 1 and the gas inlet 27, thereby further improving the safety performance of a combustion system for recovering the converter gas and saving the cost.
As shown in fig. 2-fig. 3, in the present embodiment, the combustion system for recycling converter gas further includes a four-way valve 4, the four-way valve 4 is provided with an a interface and a b interface, the a interface is connected with the top of the control device 2, and the b interface is connected with the nitrogen tank 3.
Further, the four-way valve 4 is electrically connected with a sensor, and the sensor can feed back an opening/closing electric signal of the four-way valve 4 to the four-way valve 4 under the operation of a preset computer program, so as to open or close the four-way valve 4. Illustratively, at a first preset time and a second preset time, the piston 24 is in a contracted state, that is, the piston 24 is in a state away from the combustion apparatus 1. At the third preset time, the sensor feeds back the opening electric signal of the interface a and the interface b of the four-way valve 4 to the four-way valve 4, at this time, the interface a and the interface b of the four-way valve 4 are in an opening state, nitrogen in the nitrogen tank 3 can enter the interface a along the interface b of the four-way valve 4, and then enter the accommodating cavity 23 of the control device 2, at this time, the nitrogen entering the accommodating cavity 23 has certain pressure, and the pressure is greater than the pressure of converter gas at the other end of the drive plate 242, so that the nitrogen continuously entering the accommodating cavity 23 can push the drive plate 242 to move, so that the drive plate 242 can move towards the direction close to the combustion device 1 under the dual action of the pressures of the drive device 243 and the nitrogen, the movement efficiency of the drive plate 242 is further improved, and the working efficiency of the piston 24 is also improved.
As shown in fig. 2-3, in the present embodiment, the four-way valve 4 further has a c port and a d port, the c port is connected to the bottom end of the sidewall of the control device 2, and the d port is connected to the external atmosphere. The top of the control device 2 is provided with a first interface 25, and the first interface 25 is communicated with the interface a; the bottom end of the side wall of the control device 2 is provided with a second port 26, the second port 26 is communicated with the port c, and the height of the second port 26 is higher than that of the second solenoid valve 22 along the gravity direction.
Further, at the first preset time, the first electromagnetic valve 21 is opened, and at the same time, the second port 26 on the bottom end of the side wall of the control device 2 is also opened, at this time, the nitrogen in the accommodating cavity 23 can move to the port c along the second port 26 under the pushing of the converter gas, and then is discharged to the atmosphere environment from the port d, and the nitrogen discharged from the port d does not pollute the environment because the nitrogen is non-toxic and harmless. At the second preset time, the first connector 25 and the second connector 26 are both closed, and the a connector, the b connector, the c connector and the d connector of the four-way valve 4 are also in a closed state, and at this time, the accommodating chamber 23 is filled with converter gas. Then, at a third preset time, the first port 25 is opened, the port a and the port b of the four-way valve 4 are opened, the nitrogen in the nitrogen tank 3 can enter the accommodating chamber 23, and the piston 24 can drive the converter gas in the accommodating chamber 23 to enter the combustion device 1 under the driving force of the nitrogen and the driving action of the driving device 243. At the fourth preset time, the second port 26 is opened, the port c and the port d are also opened, the nitrogen in the nitrogen tank 3 can enter the port c along the port b, then the nitrogen can enter the accommodating cavity 23 along the second port 26, and the piston 24 can be reset under the action of the nitrogen at the moment, that is, the piston 24 moves in the direction away from the combustion device 1 under the action of the pressure of the nitrogen at the moment. The opening of the first port 25 can facilitate the discharge of the nitrogen in the accommodating chamber 23 in time, that is, at this time, the upper portion of the piston 24 is communicated with the outside atmosphere, and the lower portion of the piston 24 is in a high-pressure state, so that the piston 24 can be effectively reset, and the upper portion of the piston 24 and the lower portion of the piston 24 are prevented from forming an equal-pressure state. The nitrogen gas discharged along the first port 25 enters the a port and is then discharged to the atmosphere through the d port.
Preferably, the first connector 25 and the second connector 26 are both provided with sealing rings (not shown in the figure), and the a connector, the b connector, the c connector and the d connector of the four-way valve 4 are also provided with sealing rings, which can isolate and seal converter gas or nitrogen in the control device 2 from the outside, so as to avoid the potential safety hazard of a combustion system for recovering converter gas due to leakage of converter gas or nitrogen in the process that the control device 2 is in operation. In this embodiment, the sealing ring may be made of materials such as polytetrafluoroethylene that is wear-resistant and high-temperature resistant, and a user may set double-layer or even multi-layer sealing rings on the first interface 25, the second interface 26, the a interface, the b interface, the c interface, and the d interface of the four-way valve 4 according to actual requirements, thereby further improving the sealing effect of the sealing ring.
Further, and in the direction of gravity, the height of the second port 26 is higher than the height of the second solenoid valve 22. In this way, when the second solenoid valve 22 is closed at the fourth preset time, nitrogen can be smoothly introduced into the accommodating cavity 23 along the second port 26, so that the piston 24 is reset.
In addition, the user can also communicate the d port of the four-way valve 4 with the nitrogen tank 3 (not shown in the figure) by improving the design of the four-way valve 4, so that the nitrogen entering the c port from the second port 26 on the bottom end of the side wall of the control device 2 can flow back to the nitrogen tank 3 along the d port at the first preset time and the fourth preset time, thereby realizing zero emission of the nitrogen. Therefore, the purpose of saving cost can be achieved, the utilization efficiency of nitrogen can be improved, and the working efficiency of a combustion system for recovering converter gas is improved.
As shown in fig. 1, in the embodiment, the combustion system for recycling converter gas further includes a storage device 5 for converter gas, and the storage device 5 is connected to a first end of the control device 2, so that the converter gas can enter the combustion device 1 through the control device 2.
Illustratively, because converter gas is continuously generated in the steel making process, the converter gas storage device 5 is arranged to facilitate the collection and utilization of the converter gas, and the control device 2 can control the converter gas in the converter gas storage device 5 to intermittently enter the combustion system in batches, so as to avoid the risk of explosion caused by the fact that the converter gas enters the combustion device 1 at one time.
With continued reference to fig. 1, in the present embodiment, in order to improve the efficiency of the converter gas entering the combustion device 1, the user can set the control device 2 in plural, and the plural control devices 2 are set at equal intervals. Thus, on the premise of ensuring that the converter gas does not explode, the control device 2 can convey more converter gas to the combustion device 1 in the unit, and further the working efficiency of the combustion system for recovering the converter gas is improved. Meanwhile, the control devices 2 arranged at equal intervals can prevent the converter gas entering the combustion device 1 from being accumulated, so that the converter gas is prevented from deflagration in the combustion device 1, and the reliability and the safety of a combustion system for recovering the converter gas are further improved.
Preferably, in order to facilitate installation and save the occupied space of the combustion system for recovering the converter gas, in this embodiment, a nitrogen tank 3 is selected, and a plurality of nitrogen outlets are arranged on the nitrogen tank 3 and communicated with the b interface of the four-way valve 4, and the nitrogen outlets and the b interface of the four-way valve 4 are arranged in a one-to-one correspondence manner. Make the nitrogen gas in the nitrogen gas jar 3 simultaneously and evenly enter into controlling means 2 like this, and then ensure that a plurality of controlling means 2 can be simultaneously stable send converter gas to burner 1, avoid converter gas to take place potential safety hazards such as detonation, practice thrift the cost, improve the combustion system's of retrieving converter gas reliability and security.
In addition, the combustion device 1 is connected with an external heating device, for example, the combustion device 1 can be connected with a heating device such as a blast furnace hot blast furnace, a steel rolling furnace, a coke furnace and the like, and used as a heat source for heating other external media, so that the heat of the converter gas after combustion can be directly utilized by the above heating device, and the purposes of energy conservation and emission reduction are further achieved. Certainly, the hot flue gas generated by the combustion device 1 in the embodiment can be independently recycled, so that the overall efficiency of the converter gas recovery system is improved.
The working process of the combustion system for recovering converter gas is as follows:
1): referring to fig. 2 and 3, during the first preset, the first solenoid valve 21 is turned on, and the second port 26 on the bottom end of the sidewall of the control device 2 and the ports c and d of the four-way valve 4 are turned on, so that the second port 26 is communicated with the ports c. Converter gas in the converter gas storage device 5 enters the accommodating cavity 23 along the gas inlet 27, so that nitrogen in the accommodating cavity 23 flows into the interface c along the second interface 26, and the nitrogen can be discharged to the external environment from the interface d.
2): referring to fig. 4, at the second preset time, the first electromagnetic valve 21 is closed, the second port 26 on the bottom end of the side wall of the control device 2 is closed, and at this time, the containing cavity 23 is filled with converter gas, and the containing cavity 23 is in a closed state relative to the external environment, so as to prevent the converter gas inside the containing cavity 23 from leaking.
3): referring to fig. 3 and 5, at a third preset time, the second electromagnetic valve 22 is opened, the first port 25 at the top of the control device 2 is opened, the port a and the port b of the four-way valve 4 are opened, and at this time, the accommodating chamber 23 is communicated with the port a of the four-way valve 4 through the first port 25. The nitrogen in the nitrogen tank 3 flows into the port a through the port b, so that the nitrogen flows into the accommodating cavity 23 from the first port 25, and the nitrogen can drive the piston 24 to move towards the direction close to the combustion device 1. At the same time, the driving device 243 drives the piston 24 to move toward the direction close to the combustion device 1, so that the converter gas in the accommodating cavity 23 can enter the combustion device 1 under the pushing of the piston 24.
4): referring to fig. 3 and 6, at a fourth preset time, the second solenoid valve 22 is closed, and at this time, the a port, the b port, the c port, and the d port of the four-way valve 4 are all in an open state, and the first port 25 and the second port 26 of the control device 2 are also in an open state. The nitrogen in the nitrogen tank 3 can enter the interface c through the interface b, so that the nitrogen can circulate to the second interface 26 through the interface c, and then the part of the nitrogen can enter the accommodating cavity 23 from the second interface 26. It should be noted that the nitrogen gas entering the accommodating cavity 23 through the second port 26 is located at the lower portion of the piston 24, and the pressure of the nitrogen gas is greater than that of the nitrogen gas at the upper portion of the piston 24, so that the nitrogen gas at the lower portion of the piston 24 can push the piston 24 to move in a direction away from the combustion apparatus 1, and thus the nitrogen gas at the upper portion of the piston 24 is communicated to the port a through the first port 25 and then discharged to the atmosphere through the port d, thereby implementing the resetting operation of the piston 24.
5): referring to fig. 3 and 7, the first solenoid valve 21, the second solenoid valve 22, the port a, the port b, the port c and the port d of the four-way valve 4 are all in a closed state, and at this time, the inside of the accommodating chamber 23 is filled with nitrogen, so that the combustion apparatus 1 is isolated from the converter gas in the gas inlet 27, and the safety performance of the combustion system for recovering the converter gas is improved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (7)
1. A combustion system for recovering converter gas, comprising:
a combustion device (1), the combustion device (1) being configured to burn converter gas;
the first end of the control device (2) is used for introducing the converter gas, the second end of the control device (2) is connected with the combustion device (1), and the control device (2) is used for controlling the converter gas to enter the combustion device (1) or blocking the converter gas from entering the combustion device (1);
the control device (2) comprises a first electromagnetic valve (21) and a second electromagnetic valve (22), the first electromagnetic valve (21) is arranged at the upstream end of the second electromagnetic valve (22) along the flowing direction of the converter gas, and a closed accommodating cavity (23) can be formed by the inner walls of the first electromagnetic valve (21), the second electromagnetic valve (22) and the control device (2);
the first electromagnetic valve (21) can be opened at a first preset time to enable the converter gas to enter the accommodating cavity (23), the first electromagnetic valve (21) can be closed at a second preset time to block the converter gas from entering the accommodating cavity (23), the second electromagnetic valve (22) can be opened at a third preset time to enable the converter gas to enter the combustion device (1), and the second electromagnetic valve (22) can be closed at a fourth preset time to prevent the converter gas in the combustion device (1) from flowing back to the accommodating cavity (23);
the control device (2) comprises a piston (24), the piston (24) is arranged on the inner wall of the accommodating cavity (23), and the piston (24) is configured to drive the converter gas into the combustion device (1);
the combustion system for recycling converter gas also comprises a nitrogen tank (3) filled with nitrogen, and the nitrogen tank (3) is connected with the control device (2) so that the nitrogen can fill the accommodating cavity (23) before the first electromagnetic valve (21) is opened;
the combustion system for recycling the converter gas further comprises a four-way valve (4), wherein the four-way valve (4) is provided with an interface a and an interface b, the interface a is connected with the top of the control device (2), and the interface b is connected with the nitrogen tank (3).
2. A combustion system for recovering converter gas according to claim 1, wherein said piston (24) comprises a connecting rod (241) and a driving plate (242), one end of said connecting rod (241) being connected to said driving plate (242) and the other end extending out of said control device (2).
3. The combustion system for recovering converter gas according to claim 2, wherein the piston (24) comprises a driving device (243), and the driving device (243) is fixedly connected with one end of the connecting rod (241) extending out of the control device (2).
4. The combustion system for recycling converter gas according to claim 1, wherein the four-way valve (4) is further provided with a port c and a port d, the port c is connected with the bottom end of the side wall of the control device (2), and the port d is connected to the external atmosphere.
5. The combustion system for recycling converter gas according to claim 4, wherein a first interface (25) is arranged at the top of the control device (2), and the first interface (25) is communicated with the interface a; and a second interface (26) is arranged at the bottom end of the side wall of the control device (2), the second interface (26) is communicated with the interface c, and the height of the second interface (26) is higher than that of the second electromagnetic valve (22) along the gravity direction.
6. The combustion system for recycling converter gas according to any of the claims 1 to 5, further comprising a storage device (5) for converter gas, wherein the storage device (5) for converter gas is connected to the first end of the control device (2) so that the converter gas can enter the combustion device (1) through the control device (2).
7. The combustion system for recovering converter gas according to claim 6, wherein the control device (2) is provided in plurality, and the plurality of control devices (2) are provided at equal intervals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111325957.XA CN114058774B (en) | 2021-11-10 | 2021-11-10 | Combustion system for recovering converter gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111325957.XA CN114058774B (en) | 2021-11-10 | 2021-11-10 | Combustion system for recovering converter gas |
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| CN114058774B true CN114058774B (en) | 2023-04-07 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3216712A (en) * | 1962-08-15 | 1965-11-09 | United Aircraft Corp | Air supply for a blast furnace |
| GB1360988A (en) * | 1970-09-22 | 1974-07-24 | Nixon I G | Partial combustion burners |
| JPH0520417Y2 (en) * | 1988-06-29 | 1993-05-27 | ||
| CN203571741U (en) * | 2013-08-08 | 2014-04-30 | 胜豹上桥科技股份有限公司 | Combustion device for tail gas treatment |
| CN106086293B (en) * | 2016-08-25 | 2018-12-28 | 中冶华天工程技术有限公司 | Coal gas of converter diffuses catalytic combustion system |
| CN207760375U (en) * | 2017-12-18 | 2018-08-24 | 北京京诚泽宇能源环保工程技术有限公司 | Converter gas dry dedusting waste heat recovery system |
| CN108592081B (en) * | 2018-04-28 | 2019-09-27 | 武汉科技大学 | Porous media combustor control system and method towards high temperature heating art |
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