CN212585511U - Nitrogen protection explosion-proof device of converter flue gas waste heat boiler - Google Patents
Nitrogen protection explosion-proof device of converter flue gas waste heat boiler Download PDFInfo
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- CN212585511U CN212585511U CN202021561825.8U CN202021561825U CN212585511U CN 212585511 U CN212585511 U CN 212585511U CN 202021561825 U CN202021561825 U CN 202021561825U CN 212585511 U CN212585511 U CN 212585511U
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Abstract
The utility model relates to a converter flue gas exhaust-heat boiler nitrogen protection explosion-proof equipment belongs to converter flue gas exhaust-heat boiler technical field. The technical scheme is as follows: at least one group of external upper support (20) and external lower support (21) are arranged on the outer circumference of the outer wall (2) of the waste heat boiler, a relatively closed space is formed among the outer wall (2) of the waste heat boiler, an external sealing layer (19), the external upper support (20) and the external lower support (21), and a protective layer heat-insulating material (18) is filled in the space; the nitrogen manifold (23) passes through the outer sealing layer (19) into the protective layer. The utility model has the advantages that: the air is prevented from entering the converter flue gas waste heat boiler, the outer wall of the converter flue gas waste heat boiler can be perforated, an alarm can be given in time, the phenomenon that the converter flue gas waste heat boiler leaks air can be found in time, and the hidden danger of explosion and gas leakage is eliminated. Avoid the serious influence on the converter steelmaking and avoid major safety production accidents.
Description
Technical Field
The utility model relates to a converter flue gas exhaust-heat boiler nitrogen protection explosion-proof equipment belongs to converter flue gas exhaust-heat boiler technical field.
Background
At present, a water spraying and atomizing cooling converter high-temperature flue gas treatment process (the temperature is between 1000 and 800 ℃) is commonly adopted at home and abroad, a large amount of precious water resources are consumed, the formed converter flue gas recovery process is complex, the equipment failure rate is high, the maintenance and repair cost is high, the emission exceeds the standard, and the converter flue gas heat energy and the converter ash (very good industrial raw materials) are wasted. In order to solve the problems, the converter flue gas waste heat boiler is adopted to recover the heat of the high-temperature flue gas of the converter by a pure dry method, the converter flue gas waste heat boiler can cool the flue gas from 1000-800 ℃ to about 170-200 ℃, the converter flue gas waste heat boiler operates in a temperature-changing (1000-170 ℃) negative pressure state, the dust content of the converter flue gas is extremely high, and the dust content is about 150-200 mg/Nm3The waste heat boiler is influenced by alternating stress and smoke dust particle scouring for a long time, so that cracks or perforations are easily caused on the outer wall, outside air easily enters the waste heat boiler, and when the temperature of converter flue gas is about 600 ℃, and the basic conditions of combustion are met, the risk of combustion or explosion exists; in addition, when the converter flue gas waste heat boiler is used, the converter flue gas waste heat boiler is in a negative-pressure and high-temperature (1000-170 ℃) working state for a long time, a welding connection part is easy to crack and generate a leak, the sealing performance of equipment is reduced, oxygen in air leaks into the waste heat boiler, explosion is generated, the converter steel-making production order is seriously influenced, and meanwhile, the risk of serious safety production accidents is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a converter flue gas waste heat boiler nitrogen protection explosion-proof equipment, prevent that the air from getting into converter flue gas waste heat boiler, can discover the phenomenon that converter flue gas waste heat boiler leaks the air fast, and can punch a hole to the outer wall of converter flue gas waste heat boiler and alarm in time, eliminate potential safety hazards such as explosion, gas leakage in time, guarantee personnel, equipment safety, can reduce waste heat boiler maintenance, save a large amount of manpowers, material resources; meanwhile, the high-temperature oxidation of the outer wall of the converter flue gas waste heat boiler is prevented, and the problems in the background art are solved.
The technical scheme of the utility model is that:
a nitrogen protection explosion-proof device of a converter flue gas waste heat boiler comprises a waste heat boiler outer wall, a nitrogen storage tank, a nitrogen main pressure regulating valve, a nitrogen main pressure transmitter, a branch pipe valve, a branch pipe electromagnetic valve, an external sealing layer, an external upper support and an external lower support; the outer circumference of the outer wall of the waste heat boiler is at least provided with a group of external upper supports and external lower supports, the inner end parts of the external upper supports and the external lower supports are fixed on the outer wall of the waste heat boiler, external sealing layers are arranged between the external end parts of the external upper supports and the external lower supports, a relatively closed space is formed among the outer wall of the waste heat boiler, the external sealing layers, the external upper supports and the external lower supports, and the space forms a protective layer; the nitrogen main pipe of the nitrogen storage tank is connected with the branch pipe valve and the branch pipe electromagnetic valve through the nitrogen main pipe pressure regulating valve and the nitrogen main pipe pressure transmitter, the nitrogen main pipe is called as a nitrogen branch pipe after passing through the nitrogen main pipe pressure transmitter, and the nitrogen branch pipe penetrates through the external sealing layer to enter the protective layer
And a protective layer heat-insulating material is filled in the protective layer, and the protective layer heat-insulating material and the external sealing layer form the protective layer together.
The protective layer is respectively provided with a protective layer nitrogen pressure transmitter, a protective layer temperature transmitter and an oxygen sensor, and the converter flue gas waste heat boiler is internally provided with a converter flue gas waste heat boiler flue gas temperature transmitter and a converter flue gas waste heat boiler flue gas pressure transmitter; the output of the nitrogen main pipe pressure regulating valve, the nitrogen main pipe pressure transmitter, the branch pipe electromagnetic valve, the protective layer nitrogen pressure transmitter, the protective layer temperature transmitter, the converter flue gas waste heat boiler flue gas pressure transmitter and the oxygen sensor is connected with the display.
The oxygen sensor is connected with the oxygen sensor valve.
A plurality of groups of external upper brackets and external lower brackets are arranged on the outer circumference of the outer wall of the waste heat boiler, so that the outer circumference of the outer wall of the waste heat boiler is divided into a plurality of relatively closed spaces to form a plurality of protective layers; the nitrogen main pipe is divided into a plurality of nitrogen branch pipes after passing through the nitrogen main pipe pressure transmitter, and each nitrogen branch pipe enters a corresponding heat-insulating layer to independently monitor the heat-insulating layer. For example: and synchronously dividing corresponding areas according to the arrangement positions of the heat exchange tubes of the converter flue gas waste heat boiler, wherein each area forms a protective layer.
And an inlet of the nitrogen storage tank is provided with a nitrogen main valve which is connected with an external nitrogen pipeline.
The cross sections of the external upper support and the external lower support are of T-shaped structures and are arranged around the outer wall of the waste heat boiler of the converter flue gas waste heat boiler, each T-shaped structure is composed of a transverse surface and a longitudinal surface, the transverse surface is perpendicular to the outer wall of the waste heat boiler, the longitudinal surface is parallel to the outer wall of the waste heat boiler, and the external sealing layer is arranged on the longitudinal surface.
The high-pressure nitrogen enters the nitrogen storage tank for storage, after passing through the nitrogen storage tank, the nitrogen is firstly decompressed, the pressure of the nitrogen is adjusted to be slightly greater than the atmospheric pressure, the nitrogen enters and is filled with the protective layer after passing through the nitrogen header pressure adjusting valve, the nitrogen header pressure transmitter, the branch pipe valve and the branch pipe electromagnetic valve, the external air is isolated, the nitrogen cannot enter the outer wall of the waste heat boiler, the protective layer heat-insulating material in the protective layer ensures that the protective layer is filled with the nitrogen, the use amount of the nitrogen is minimized, the safe production can be achieved, and the operation cost.
And the protective layer nitrogen pressure transmitter and the protective layer temperature transmitter are used for detecting the temperature and the nitrogen air pressure difference in the protective layer, the protective layer nitrogen pressure transmitter and the protective layer temperature transmitter are arranged on an external upper bracket of the protective layer, and the detection probes of the protective layer nitrogen pressure transmitter and the protective layer temperature transmitter enter the protective layer.
The oxygen sensor detects oxygen in the protective layer, because the nitrogen pressure of protective layer slightly is greater than air pressure, under normal condition, oxygen sensor can not detect oxygen, if detect oxygen, just indicate that exhaust-heat boiler outer wall has the crack or has the leak, need increase nitrogen gas volume, prevent that air from getting into converter flue gas exhaust-heat boiler and converter flue gas and mixing, the emergence explosion. The oxygen sensor is installed on the outer lower bracket of the protective layer, and the detection probe of the oxygen sensor enters the protective layer.
The converter flue gas waste heat boiler flue gas temperature transmitter and the converter flue gas waste heat boiler flue gas pressure transmitter are used for measuring the temperature and the pressure of the converter flue gas waste heat boiler, the converter flue gas waste heat boiler flue gas temperature transmitter and the converter flue gas waste heat boiler flue gas pressure transmitter are arranged on an outer lower support of the protective layer, and detection probes of the converter flue gas waste heat boiler flue gas temperature transmitter and the converter flue gas waste heat boiler flue gas pressure transmitter enter the converter flue gas waste heat.
The display displays signals such as the pressure of a nitrogen header pipe, the pressure of the adjusted nitrogen, a nitrogen electromagnetic valve, the air pressure difference and the temperature of the nitrogen in the protective layer, the oxygen concentration of the nitrogen in the protective layer, the temperature and the pressure of converter smoke in the converter smoke waste heat boiler and the like, and is used for judging whether leakage occurs or not.
The utility model has the advantages that: the air is prevented from entering the converter flue gas waste heat boiler, the outer wall of the converter flue gas waste heat boiler can be perforated, an alarm can be given in time, the phenomenon that the converter flue gas waste heat boiler leaks air can be found in time, and the hidden danger of explosion and gas leakage is eliminated. Avoid the serious influence on the converter steelmaking and avoid major safety production accidents. The maintenance of the waste heat boiler is reduced, and a large amount of equipment, manpower and material resources are saved. The outer wall of the waste heat boiler (at high temperature) is prevented from being oxidized, and the service life of the waste heat boiler can be effectively prolonged.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention;
FIG. 2 is a schematic view of a converter flue gas waste heat boiler according to an embodiment of the present invention;
in the figure: the device comprises a converter flue gas waste heat boiler 1, a waste heat boiler outer wall 2, a nitrogen main valve 3, a nitrogen storage tank 4, a nitrogen main pressure regulating valve 5, a nitrogen main (after pressure regulation) pressure transmitter 6, a branch pipe valve 7, a branch pipe electromagnetic valve 8, a protective layer nitrogen pressure transmitter 9, a protective layer temperature transmitter 10, a converter flue gas waste heat boiler flue gas temperature transmitter 11, a converter flue gas waste heat boiler flue gas pressure transmitter 12, an oxygen sensor valve 13, an oxygen sensor 14, a display 15, a protective layer heat insulation material 18, an external sealing layer 19, an external upper support 20, an external lower support 21, a nitrogen main 22 and a nitrogen branch pipe 23.
Detailed Description
The present invention will be further explained by way of examples with reference to the accompanying drawings.
A nitrogen protection explosion-proof device of a converter flue gas waste heat boiler comprises a waste heat boiler outer wall 2, a nitrogen storage tank 4, a nitrogen header pressure regulating valve 5, a nitrogen header pressure transmitter 6, a branch pipe valve 7, a branch pipe electromagnetic valve 8, an external sealing layer 19, an external upper support 20 and an external lower support 21; at least one group of external upper bracket 20 and external lower bracket 21 is arranged on the outer circumference of the waste heat boiler outer wall 2, the inner end parts of the external upper bracket 20 and the external lower bracket 21 are fixed on the waste heat boiler outer wall 2, an external sealing layer 19 is arranged between the outer end parts of the external upper bracket 20 and the external lower bracket 21, a relatively closed space is formed among the waste heat boiler outer wall 2, the external sealing layer 19, the external upper bracket 20 and the external lower bracket 21, and the space forms a protective layer; a nitrogen manifold 22 of the nitrogen storage tank 4 is connected with a branch pipe valve 7 and a branch pipe electromagnetic valve 8 through a nitrogen manifold pressure regulating valve 5 and a nitrogen manifold pressure transmitter 6, the nitrogen manifold 22 is called a nitrogen branch pipe 23 after passing through the nitrogen manifold pressure transmitter 6, and the nitrogen branch pipe 23 penetrates through an external sealing layer 19 to enter a protective layer.
And the protective layer is filled with a protective layer heat-insulating material 18, and the protective layer heat-insulating material 18 and an external sealing layer 19 form the protective layer together.
The protective layer is respectively provided with a protective layer nitrogen pressure transmitter 9, a protective layer temperature transmitter 10 and an oxygen sensor 14, and the converter flue gas waste heat boiler 1 is internally provided with a converter flue gas waste heat boiler flue gas temperature transmitter 11 and a converter flue gas waste heat boiler flue gas pressure transmitter 12; the output of the nitrogen main pressure regulating valve 5, the nitrogen main pressure transmitter 6, the branch pipe electromagnetic valve 8, the protective layer nitrogen pressure transmitter 9, the protective layer temperature transmitter 10, the converter flue gas waste heat boiler flue gas temperature transmitter 11, the converter flue gas waste heat boiler flue gas pressure transmitter 12 and the oxygen sensor 14 are connected with the display 15.
The oxygen sensor 14 is connected with an oxygen sensor valve 13.
A plurality of groups of external upper brackets 20 and external lower brackets 21 are arranged on the outer circumference of the outer wall 2 of the waste heat boiler, so that the outer circumference of the outer wall 2 of the waste heat boiler is divided into a plurality of relatively closed spaces to form a plurality of protective layers; the nitrogen main pipe 22 is divided into a plurality of nitrogen branch pipes 23 after passing through the nitrogen main pipe pressure transmitter 6, and each nitrogen branch pipe 23 enters a corresponding heat-insulating layer to independently monitor the heat-insulating layer. For example: and synchronously dividing corresponding areas according to the arrangement positions of the heat exchange tubes of the converter flue gas waste heat boiler, wherein each area forms a protective layer.
And an inlet of the nitrogen storage tank 4 is provided with a nitrogen main valve 3 which is connected with an external nitrogen pipeline.
The sections of the external upper support 20 and the external lower support 21 are of T-shaped structures and are arranged around the outer wall 2 of the waste heat boiler of the converter flue gas waste heat boiler, each T-shaped structure is composed of a transverse surface and a longitudinal surface, the transverse surface is perpendicular to the outer wall 2 of the waste heat boiler, the longitudinal surface is parallel to the outer wall 2 of the waste heat boiler, and the external sealing layer 19 is arranged on the longitudinal surface.
High-pressure nitrogen enters a nitrogen storage tank 4 for storage, after passing through the nitrogen storage tank 4, the nitrogen is firstly decompressed, the pressure of the nitrogen is adjusted to be slightly larger than the atmospheric pressure, the nitrogen enters and is filled with a protective layer after passing through a nitrogen header pressure adjusting valve 5, a nitrogen header pressure transmitter 6, a branch pipe valve 7 and a branch pipe electromagnetic valve 8, the external air is isolated and cannot enter the outer wall 2 of the waste heat boiler, a protective layer heat insulation material 18 in the protective layer ensures that the protective layer is filled with the nitrogen, the use amount of the nitrogen is minimized, safe production can be achieved, and the operation cost can be reduced.
The protective layer nitrogen pressure transmitter 9 and the protective layer temperature transmitter 10 detect the temperature and the nitrogen air pressure difference in the protective layer, the protective layer nitrogen pressure transmitter 9 and the protective layer temperature transmitter 10 are installed on an external upper support 20 of the protective layer, and a detection probe of the protective layer enters the protective layer.
The oxygen sensor 14 detects oxygen in the protective layer, and because the nitrogen pressure of protective layer slightly is greater than air pressure, under normal condition, oxygen sensor 14 can not detect oxygen, if detect oxygen, just indicate that exhaust-heat boiler outer wall 2 has a crack or has a leak, need increase nitrogen gas volume, prevent that air from getting into converter flue gas exhaust-heat boiler and converter flue gas mixing, the emergence explosion. The oxygen sensor 14 is mounted on the outer subframe 21 of the protective layer, which detects the probe entry into the protective layer.
The converter flue gas waste heat boiler flue gas temperature transmitter 11 and the converter flue gas waste heat boiler flue gas pressure transmitter 12 measure the temperature and the pressure of the converter flue gas waste heat boiler, the converter flue gas waste heat boiler flue gas temperature transmitter 11 and the converter flue gas waste heat boiler flue gas pressure transmitter 12 are installed on an outer lower support 21 of the protective layer, and a detection probe of the converter flue gas waste heat boiler enters the converter flue gas waste heat boiler.
The display 15 displays signals such as the pressure of a nitrogen header pipe, the pressure of the adjusted nitrogen, a nitrogen electromagnetic valve, the air pressure difference and the temperature of the nitrogen in the protective layer, the oxygen concentration of the nitrogen in the protective layer, the temperature and the pressure of converter smoke in the converter smoke waste heat boiler and the like, and is used for judging whether leakage occurs or not.
The protective layer heat-insulating material 18 used in the middle of the protective layer is made of environment-friendly, high-temperature-resistant and good heat-insulating effect materials as much as possible, and is nitrogen-filled, explosion-proof and isolated, so that the outer wall of the converter flue gas waste heat boiler can be prevented from being oxidized, and the service life of the converter flue gas waste heat boiler can be effectively prolonged.
Claims (6)
1. The utility model provides a converter flue gas exhaust-heat boiler nitrogen protection explosion-proof equipment which characterized in that: the waste heat boiler comprises a waste heat boiler outer wall (2), a nitrogen storage tank (4), a nitrogen header pressure regulating valve (5), a nitrogen header pressure transmitter (6), a branch pipe valve (7), a branch pipe electromagnetic valve (8), an external sealing layer (19), an external upper support (20) and an external lower support (21); at least one group of external upper support (20) and external lower support (21) are arranged on the outer circumference of the waste heat boiler outer wall (2), the inner ends of the external upper support (20) and the external lower support (21) are fixed on the waste heat boiler outer wall (2), an external sealing layer (19) is arranged between the external ends of the external upper support (20) and the external lower support (21), a relatively closed space is formed among the waste heat boiler outer wall (2), the external sealing layer (19), the external upper support (20) and the external lower support (21), and the space forms a protective layer; a nitrogen header pipe (22) of the nitrogen storage tank (4) is connected with a branch pipe valve (7) and a branch pipe electromagnetic valve (8) through a nitrogen header pipe pressure regulating valve (5) and a nitrogen header pipe pressure transmitter (6), the nitrogen header pipe (22) is called a nitrogen branch pipe (23) after passing through the nitrogen header pipe pressure transmitter (6), and the nitrogen branch pipe (23) penetrates through an external sealing layer (19) to enter a protective layer.
2. The nitrogen protection explosion-proof device of the converter flue gas waste heat boiler according to claim 1, characterized in that: and a protective layer heat-insulating material (18) is filled in the protective layer, and the protective layer heat-insulating material (18) and the external sealing layer (19) form the protective layer together.
3. The nitrogen protection explosion-proof device of the converter flue gas waste heat boiler according to claim 1 or 2, characterized in that: the protective layer is respectively provided with a protective layer nitrogen pressure transmitter (9), a protective layer temperature transmitter (10) and an oxygen sensor (14), and a converter flue gas waste heat boiler flue gas temperature transmitter (11) and a converter flue gas waste heat boiler flue gas pressure transmitter (12) are respectively arranged in the converter flue gas waste heat boiler (1); the output of the nitrogen main pressure regulating valve (5), the nitrogen main pressure transmitter (6), the branch pipe electromagnetic valve (8), the protective layer nitrogen pressure transmitter (9), the protective layer temperature transmitter (10), the converter flue gas waste heat boiler flue gas temperature transmitter (11), the converter flue gas waste heat boiler flue gas pressure transmitter (12) and the oxygen sensor (14) are connected with the display (15).
4. The nitrogen protection explosion-proof device of the converter flue gas waste heat boiler according to claim 1 or 2, characterized in that: and an inlet of the nitrogen storage tank (4) is provided with a nitrogen main valve (3) which is connected with an external nitrogen pipeline.
5. The nitrogen protection explosion-proof device of the converter flue gas waste heat boiler according to claim 1 or 2, characterized in that: a plurality of groups of external upper brackets (20) and external lower brackets (21) are arranged on the outer circumference of the outer wall (2) of the waste heat boiler, so that the outer circumference of the outer wall (2) of the waste heat boiler is divided into a plurality of relatively closed spaces to form a plurality of protective layers; the nitrogen main pipe (22) is divided into a plurality of nitrogen branch pipes (23) after passing through the nitrogen main pipe pressure transmitter (6), and each nitrogen branch pipe (23) enters a corresponding heat-insulating layer.
6. The nitrogen protection explosion-proof device of the converter flue gas waste heat boiler according to claim 1 or 2, characterized in that: the section of the outer upper support (20) and the section of the outer lower support (21) are of T-shaped structures and are arranged around the outer wall (2) of the waste heat boiler of the converter flue gas waste heat boiler, each T-shaped structure is composed of a transverse surface and a longitudinal surface, the transverse surface is perpendicular to the outer wall (2) of the waste heat boiler, the longitudinal surface is parallel to the outer wall (2) of the waste heat boiler, and the outer sealing layer (19) is arranged on the longitudinal surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021561825.8U CN212585511U (en) | 2020-07-31 | 2020-07-31 | Nitrogen protection explosion-proof device of converter flue gas waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021561825.8U CN212585511U (en) | 2020-07-31 | 2020-07-31 | Nitrogen protection explosion-proof device of converter flue gas waste heat boiler |
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| Publication Number | Publication Date |
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| CN212585511U true CN212585511U (en) | 2021-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021561825.8U Active CN212585511U (en) | 2020-07-31 | 2020-07-31 | Nitrogen protection explosion-proof device of converter flue gas waste heat boiler |
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| CN (1) | CN212585511U (en) |
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- 2020-07-31 CN CN202021561825.8U patent/CN212585511U/en active Active
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