CN113251398A - Equipment for producing steam and hot water by using low-calorific-value gas and using method thereof - Google Patents
Equipment for producing steam and hot water by using low-calorific-value gas and using method thereof Download PDFInfo
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- CN113251398A CN113251398A CN202110663471.0A CN202110663471A CN113251398A CN 113251398 A CN113251398 A CN 113251398A CN 202110663471 A CN202110663471 A CN 202110663471A CN 113251398 A CN113251398 A CN 113251398A
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- steam
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- concentration gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
Abstract
The invention provides equipment for producing steam and hot water by using low-heat-value gas, and relates to the technical field of low-concentration gas application; comprises a furnace body with a heating jacket, wherein a steam evaporation coil pipe and a burner are arranged in the furnace body; the steam evaporation coil is connected with the softened water storage tank and the steam-water separator through a pipe; the heating clamp is sleeved with the fresh water storage tank and the hot water outlet pipeline; the combustor is connected with a high-concentration gas pipeline through a gas mixing component, and the gas mixing component is connected with a low-concentration gas pipeline through a flame arrester component; the control system controls the overall operation of the equipment. The invention also discloses a using method of the device. The invention realizes the recycling of the low-heat value gas, and avoids resource waste and environmental pollution; meanwhile, tempering control in the premixing combustion process of low-concentration gas is achieved, the adjustment of the air-fuel ratio and the combustion load and the related control of the steam generation amount are achieved, the safety and the reliability of the operation of steam production and hot water equipment are guaranteed, and suitable equipment and a method are provided for recycling the low-heat-value gas.
Description
Technical Field
The invention relates to the technical field of low-concentration gas application, in particular to equipment for producing steam and hot water by using low-calorific-value gas and a using method thereof.
Background
At present, the method for producing steam by gas combustion mainly comprises a natural circulation boiler, a forced circulation boiler or a steam generator device. The conventional natural circulation boiler is composed of a feed water pump, an ascending pipe on a heating surface in a boiler body, a steam pocket, a descending pipe, a lower header, a burner, a control system and the like, and generally belongs to the supervision range of a pressure vessel due to the large volume of the steam pocket. The equipment has the problems of large volume, long starting time, strict safety supervision, slow steam raising, low efficiency and the like, and is particularly not suitable for special occasions needing steam. The once-through boiler in the forced circulation boiler consists of a feed water pump, a boiler body, an evaporating pipe, a steam-water separator, a burner, a control system and the like. Because the once-through boiler volume is less, small-size boiler does not belong to pressure vessel supervision range, and has that the boot-strap is fast, and operation degree of automation is high, and it is nimble convenient to use, characteristics such as safe and reliable obtain user's extensive favor, especially use in some special occasions and more embody its advantage.
For low-calorific-value gas, such as gas with a concentration of 1-10% V, the low-calorific-value gas cannot be directly utilized, and is generally subjected to emptying and discharging treatment based on safety considerations, so that resource waste and environmental pollution are caused, and therefore, it is necessary to recycle the low-calorific-value gas. At present, the most direct and better utilization approach is to produce steam by burning low-concentration gas, but the conventional medium and small-sized once-through boilers are mainly oil-fired or natural gas-fired boilers, the burners and the control operation method are not suitable for low-calorific-value gas fuel, and the recycling of low-calorific-value gas needs safer and more reliable steam production equipment.
Disclosure of Invention
The invention provides equipment for producing steam and hot water by using low-calorific-value gas and a using method thereof, and solves the problems of resource waste and environmental pollution caused by incapability of using the low-calorific-value gas in the prior art.
The technical scheme of the invention is realized as follows:
the equipment for producing steam and hot water by using low-calorific-value gas comprises a furnace body, wherein a heating jacket is arranged on the outer wall of the furnace body, and a steam evaporation coil pipe and a burner are arranged inside the furnace body;
the inlet end of the steam evaporation coil pipe is connected with a softened water storage tank through a softened water pipeline, and a softened water flow meter, a softened water adjusting valve, a softened water pressure sensor and a softened water inlet pump are arranged on the softened water pipeline;
the outlet end of the steam evaporation coil is connected with a steam-water separator through a steam pipeline, and a steam pressure sensor and a steam regulating valve are arranged on the steam pipeline; a steam temperature sensor is arranged on the steam evaporation coil;
the inlet end of the heating jacket is connected with a fresh water storage tank through a fresh water pipeline, and a fresh water inlet pump, a fresh water flowmeter and a fresh water regulating valve are arranged on the fresh water pipeline;
the outlet end of the heating jacket is connected with a hot water outlet pipeline, and a hot water temperature sensor and a hot water regulating valve are arranged on the hot water outlet pipeline;
the burner is connected with a gas mixing component; the gas mixing component is connected with a high-concentration gas pipeline, and a high-concentration gas flowmeter and a high-concentration gas regulating valve are arranged on the high-concentration gas pipeline; the gas mixing component is connected with a low-concentration gas pipeline through a flame arrester component, and the low-concentration gas pipeline is provided with a low-concentration gas flowmeter, a low-concentration gas concentration detector and a low-concentration gas regulating valve;
the combustor, the softened water flow meter, the softened water regulating valve, the softened water pressure sensor, the softened water inlet pump, the steam pressure sensor, the steam regulating valve, the steam temperature sensor, the fresh water inlet pump, the fresh water flow meter, the fresh water regulating valve, the high-concentration gas flow meter, the high-concentration gas regulating valve, the low-concentration gas flow meter, the low-concentration gas concentration detector and the low-concentration gas regulating valve are connected with the control system in a control mode.
Further, the furnace body is of a vertical structure, and the steam evaporation coil comprises an upper convection section coil and a lower radiation section coil.
Further, the combustor is arranged at the lower end inside the furnace body and is connected with the furnace body through a flange.
Further, the burner is provided with an anti-backfire burner head.
Furthermore, a separator pressure sensor is arranged on the steam-water separator and is in control connection with a control system.
A method for using the device for producing steam and hot water by using low heating value gas comprises the following steps:
1) starting a softened water inlet pump, a softened water regulating valve and a steam regulating valve to ensure that softened water in a softened water storage tank sequentially passes through a softened water pipeline, a steam evaporation coil, a steam pipeline and a steam-water separator to establish softened water circulation in the steam evaporation coil;
2) opening a fresh water inlet pump, a fresh water regulating valve and a hot water regulating valve to enable fresh water in the fresh water storage tank to sequentially pass through a fresh water pipeline, a heating jacket and a hot water outlet pipeline, and establishing fresh water circulation;
3) opening a low-concentration gas regulating valve, a high-concentration gas regulating valve and a burner; the control system calculates the flow of the high-concentration gas to be configured according to the numerical value measured by the low-concentration gas flowmeter, the numerical value measured by the low-concentration gas concentration detector and the preset air-fuel ratio, and compares the flow with the numerical value measured by the high-concentration gas flowmeter to adjust the high-concentration gas regulating valve to supplement the required high-concentration gas; the high-concentration gas and the low-concentration gas are mixed in the gas mixing component and then supplied to the combustor for combustion, thereby realizing the production of steam and hot water.
Further, when the measured value of the softened water pressure sensor is lower than a control value or the measured value of the steam temperature sensor exceeds a set value, the control system sends out an alarm signal or a linkage signal to close the burner, and the whole set of equipment enters an automatic shutdown program.
Further, when the measured value of the hot water temperature sensor exceeds a set temperature, the control system adjusts the fresh water regulating valve to increase the filling of the fresh water.
The invention has the beneficial effects that:
the invention has simple structure and convenient use; the recycling of low-heat value gas is realized, and resource waste and environmental pollution are avoided; meanwhile, tempering control in the premixing combustion process of low-concentration gas is achieved, the adjustment of the air-fuel ratio and the combustion load and the related control of the steam generation amount are achieved, the safety and the reliability of the operation of steam production and hot water equipment are guaranteed, and suitable equipment and a method are provided for recycling the low-heat-value gas. The invention can be widely applied to various low-heat value fuel gases to produce steam and hot water, and realizes the safe and efficient recycling of the low-heat value fuel gases.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Wherein:
1. a steam temperature sensor; 2. a fresh water flow meter; 3. a fresh water intake pump; 4. a fresh water regulating valve; 5. a fresh water storage tank; 6. a steam-water separator; 7. a separator pressure sensor; 8. a steam regulating valve; 9. a steam pressure sensor; 10. a hot water temperature sensor; 11. a smoke outlet; 12. a softened water flow meter; 13. a softened water regulator valve; 14. a softened water pressure sensor; 15. a softened water storage tank; 16. a softened water inlet pump; 17. a furnace body; 18. a heating jacket; 19. a steam evaporating coil; 20. a control system; 21. a high-concentration gas pipeline; 22. a high concentration gas flow meter; 23. a high-concentration gas regulating valve; 24. a low concentration gas line; 25. a low concentration gas flow meter; 26. a low-concentration gas concentration detector; 27. a low-concentration gas regulating valve; 28. a flame arrestor member; 29. a gas mixing member; 30. a burner; 31. anti-backfire combustion head.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the apparatus for producing steam and hot water by using low-calorific-value gas in this embodiment includes a furnace body 17, in this embodiment, the furnace body 17 is a vertical structure, and a smoke outlet 11 is arranged at the top of the furnace body 17; the outer wall of the furnace body 17 is provided with a heating jacket 18, the interior of the furnace body 17 is provided with a steam evaporation coil 19 and a burner 30, and the burner 30 is a low-concentration gas burner 30. In this embodiment, the steam evaporation coil 19 includes an upper convection section coil and a lower radiant section coil. The burner 30 is arranged at the lower end inside the furnace body 17, and the burner 30 is connected with the furnace body 17 through a flange. The upper part of the burner 30 is provided with an anti-backfire burner head 31.
The inlet end of the steam evaporation coil pipe 19 is connected with a softened water storage tank 15 through a softened water pipeline, and the softened water pipeline is provided with a softened water flow meter 12, a softened water adjusting valve 13, a softened water pressure sensor 14 and a softened water inlet pump 16. The outlet end of the steam evaporation coil pipe 19 is connected with a steam-water separator 6 through a steam pipeline, a separator pressure sensor 7 is arranged on the steam-water separator 6, and a steam pressure sensor 9 and a steam regulating valve 8 are arranged on the steam pipeline; the steam evaporation coil pipe 19 is provided with a steam temperature sensor 1, and in the embodiment, the steam temperature sensor 1 is located at the lower end of the steam evaporation coil pipe 19 and is close to the outlet end of the steam evaporation coil pipe 19.
The inlet end of the heating jacket 18 is connected with a fresh water storage tank 5 through a fresh water pipeline, and a fresh water inlet pump 3, a fresh water flowmeter 2 and a fresh water regulating valve 4 are arranged on the fresh water pipeline. The outlet end of the heating jacket 18 is connected with a hot water outlet pipeline, and a hot water temperature sensor 10 and a hot water regulating valve are arranged on the hot water outlet pipeline.
The burner 30 is connected to a gas mixing member 29; the gas mixing component 29 is connected with a high-concentration gas pipeline 21, and a high-concentration gas flowmeter 22 and a high-concentration gas regulating valve 23 are arranged on the high-concentration gas pipeline 21; the gas mixing member 29 is connected to the low-concentration gas line 24 via a flame arrestor member 28, in this embodiment the flame arrestor member 28 is a microchannel flame arrestor member; the low-concentration gas pipeline 24 is provided with a low-concentration gas flowmeter 25, a low-concentration gas concentration detector 26 and a low-concentration gas regulating valve 27.
The combustor 30, the softened water flow meter 12, the softened water regulating valve 13, the softened water pressure sensor 14, the softened water inlet pump 16, the steam pressure sensor 9, the steam regulating valve 8, the steam temperature sensor 1, the fresh water inlet pump 3, the fresh water flow meter 2, the fresh water regulating valve 4, the high-concentration gas flow meter 22, the high-concentration gas regulating valve 23, the low-concentration gas flow meter 25, the low-concentration gas concentration detector 26, the low-concentration gas regulating valve 27 and the separator pressure sensor 7 are in control connection with the control system 20. The control system 20 is used for controlling the safe and stable overall operation of the equipment according to the measurement data of each flowmeter and sensor.
The use method of the device for producing steam and hot water by using low-heating-value gas in the embodiment comprises the following steps:
1) and opening the softened water inlet pump 16, the softened water regulating valve 13 and the steam regulating valve 8, so that the softened water in the softened water storage tank 15 sequentially passes through the softened water pipeline, the steam evaporation coil 19, the steam pipeline and the steam-water separator 6, and softened water circulation in the steam evaporation coil 19 is established. Under the action of the softened water inlet pump 16, the softened water is metered by the softened water flow meter 12 and is adjusted by the softened water adjusting valve 13, and then enters the steam evaporation coil 19 in the furnace body 17.
2) And opening the fresh water inlet pump 3, the fresh water regulating valve 4 and the hot water regulating valve, so that the fresh water in the fresh water storage tank 5 sequentially passes through the fresh water pipeline, the heating jacket 18 and the hot water outlet pipeline, and fresh water circulation is established. Under the action of the fresh water inlet pump 3, the fresh water is metered by the fresh water flowmeter 2 and the flow of the fresh water is regulated and controlled by the fresh water regulating valve 4.
3) After the circulation of the softened water and the fresh water is stable, opening the low-concentration gas regulating valve 27, the high-concentration gas regulating valve 23 and the combustor 30; the control system 20 calculates the flow rate of the high-concentration gas to be configured according to the value measured by the low-concentration gas flowmeter 25, the value measured by the low-concentration gas concentration detector 26 and the preset air-fuel ratio, and compares the flow rate with the value measured by the high-concentration gas flowmeter 22 to adjust the high-concentration gas regulating valve 23 to supplement the required high-concentration gas; the high-concentration gas and the low-concentration gas are mixed in the gas mixing member 29 and supplied to the burner 30 to be burned, thereby realizing the production of steam and hot water. Specifically, the low-concentration gas from the low-concentration gas line 24 is subjected to gas concentration detection by the low-concentration gas concentration detector 26 and flow rate detection by the low-concentration gas flow meter 25, the amount of the gas is controlled by the low-concentration gas regulating valve 27, the flow rate of the high-concentration gas is controlled by the high-concentration gas regulating valve 23 according to the set air-fuel ratio, the flow rate of the high-concentration gas is monitored by the high-concentration gas flow meter 22, and the high-concentration gas is replenished through the high-concentration gas line 21 to meet the requirements of the appropriate air-fuel ratio and the heat load. With the stable combustion of the burner 30, the softened water in the steam evaporation coil 19 is heated to generate steam, and the steam is sent to the steam-water separator 6 through a steam pipeline for separation treatment. The fresh water in the heating jacket 18 is heated to generate hot water, and the hot water is discharged through a hot water outlet pipeline. The present embodiment can continuously and stably supply the required steam and hot water to the user.
In the operation process of the equipment, the steam generation amount and the hot water amount are subjected to associated control through the combustion heat of the premixed gas and the heating efficiency of the furnace body 17, and when the steam generation amount and the hot water amount are changed, the load of the combustor 30 is synchronously matched and controlled, so that the requirements for producing steam and hot water are met.
When the measured value of the softened water pressure sensor 14 is lower than the control value or the measured value of the steam temperature sensor 1 exceeds the set value, the control system 20 sends out an alarm signal or a linkage signal to prompt that the softened water is abnormally fed and faults such as dry burning may occur, at the moment, the burner 30 is closed, and the whole set of equipment enters an automatic shutdown program.
When the measured value of the hot water temperature sensor 10 exceeds the set temperature, the control system 20 adjusts the fresh water regulating valve 4 to increase the injection of fresh water to ensure that the fresh water in the jacket maintains the hot water state without generating steam.
The embodiment realizes the recycling of the low-heat value gas, and avoids resource waste and environmental pollution; meanwhile, tempering control in the premixing combustion process of low-concentration gas is achieved, the adjustment of the air-fuel ratio and the combustion load and the related control of the steam generation amount are achieved, the safety and the reliability of the operation of steam production and hot water equipment are guaranteed, and suitable equipment and a method are provided for recycling the low-heat-value gas. The invention can be widely applied to various low-heat value fuel gases to produce steam and hot water, and realizes the safe and efficient recycling of the low-heat value fuel gases.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The equipment for producing steam and hot water by using low-calorific-value gas is characterized by comprising a furnace body, wherein the outer wall of the furnace body is provided with a heating jacket, and a steam evaporation coil pipe and a burner are arranged inside the furnace body;
the inlet end of the steam evaporation coil pipe is connected with a softened water storage tank through a softened water pipeline, and a softened water flow meter, a softened water adjusting valve, a softened water pressure sensor and a softened water inlet pump are arranged on the softened water pipeline;
the outlet end of the steam evaporation coil is connected with a steam-water separator through a steam pipeline, and a steam pressure sensor and a steam regulating valve are arranged on the steam pipeline; a steam temperature sensor is arranged on the steam evaporation coil;
the inlet end of the heating jacket is connected with a fresh water storage tank through a fresh water pipeline, and a fresh water inlet pump, a fresh water flowmeter and a fresh water regulating valve are arranged on the fresh water pipeline;
the outlet end of the heating jacket is connected with a hot water outlet pipeline, and a hot water temperature sensor and a hot water regulating valve are arranged on the hot water outlet pipeline;
the burner is connected with a gas mixing component; the gas mixing component is connected with a high-concentration gas pipeline, and a high-concentration gas flowmeter and a high-concentration gas regulating valve are arranged on the high-concentration gas pipeline; the gas mixing component is connected with a low-concentration gas pipeline through a flame arrester component, and the low-concentration gas pipeline is provided with a low-concentration gas flowmeter, a low-concentration gas concentration detector and a low-concentration gas regulating valve;
the combustor, the softened water flow meter, the softened water regulating valve, the softened water pressure sensor, the softened water inlet pump, the steam pressure sensor, the steam regulating valve, the steam temperature sensor, the fresh water inlet pump, the fresh water flow meter, the fresh water regulating valve, the high-concentration gas flow meter, the high-concentration gas regulating valve, the low-concentration gas flow meter, the low-concentration gas concentration detector and the low-concentration gas regulating valve are connected with the control system in a control mode.
2. The apparatus for producing steam and hot water using low heating value gas as claimed in claim 1, wherein the furnace body has a vertical structure, and the steam evaporating coil includes an upper convection section coil and a lower radiation section coil.
3. The apparatus for producing steam and hot water using low heating value gas as claimed in claim 2, wherein the burner is provided at a lower end of the inside of the furnace body, and the burner is connected to the furnace body through a flange.
4. The apparatus for producing steam and hot water using low heating value gas as claimed in claim 1, wherein the burner is provided with a backfire preventing burner head.
5. The apparatus for producing steam and hot water using low heating value gas as claimed in claim 1, wherein a separator pressure sensor is provided on the steam-water separator, and the separator pressure sensor is in control connection with the control system.
6. Use of a plant for producing steam and hot water with low heating value gas according to claim 1, characterized in that it comprises the following steps:
1) starting a softened water inlet pump, a softened water regulating valve and a steam regulating valve to ensure that softened water in a softened water storage tank sequentially passes through a softened water pipeline, a steam evaporation coil, a steam pipeline and a steam-water separator to establish softened water circulation in the steam evaporation coil;
2) opening a fresh water inlet pump, a fresh water regulating valve and a hot water regulating valve to enable fresh water in the fresh water storage tank to sequentially pass through a fresh water pipeline, a heating jacket and a hot water outlet pipeline, and establishing fresh water circulation;
3) opening a low-concentration gas regulating valve, a high-concentration gas regulating valve and a burner; the control system calculates the flow of the high-concentration gas to be configured according to the numerical value measured by the low-concentration gas flowmeter, the numerical value measured by the low-concentration gas concentration detector and the preset air-fuel ratio, and compares the flow with the numerical value measured by the high-concentration gas flowmeter to adjust the high-concentration gas regulating valve to supplement the required high-concentration gas; the high-concentration gas and the low-concentration gas are mixed in the gas mixing component and then supplied to the combustor for combustion, thereby realizing the production of steam and hot water.
7. The method of using an apparatus for producing steam and hot water using low heating value gas as claimed in claim 6, wherein when the measured value of the softened water pressure sensor is lower than a control value or when the measured value of the steam temperature sensor exceeds a set value, the control system sends out an alarm signal or a chain signal, the burner is turned off, and the whole apparatus enters an automatic shutdown procedure.
8. The use of an apparatus for producing steam and hot water using low heating value gas as claimed in claim 6 or 7, wherein the control system adjusts the fresh water adjusting valve to increase the injection of fresh water when the measured value of the hot water temperature sensor exceeds a set temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110663471.0A CN113251398A (en) | 2021-06-15 | 2021-06-15 | Equipment for producing steam and hot water by using low-calorific-value gas and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110663471.0A CN113251398A (en) | 2021-06-15 | 2021-06-15 | Equipment for producing steam and hot water by using low-calorific-value gas and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113251398A true CN113251398A (en) | 2021-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110663471.0A Pending CN113251398A (en) | 2021-06-15 | 2021-06-15 | Equipment for producing steam and hot water by using low-calorific-value gas and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113251398A (en) |
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2021
- 2021-06-15 CN CN202110663471.0A patent/CN113251398A/en active Pending
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