CN110762832A - Domestic heating water heater based on porous medium burning low-heating-value gas - Google Patents
Domestic heating water heater based on porous medium burning low-heating-value gas Download PDFInfo
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- CN110762832A CN110762832A CN201911073600.XA CN201911073600A CN110762832A CN 110762832 A CN110762832 A CN 110762832A CN 201911073600 A CN201911073600 A CN 201911073600A CN 110762832 A CN110762832 A CN 110762832A
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- Prior art keywords
- porous medium
- value gas
- air
- low
- combustion chamber
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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
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/107—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using fluid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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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
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The invention discloses a household heating water heater based on porous medium combustion low-calorific-value gas, which comprises a fuel air premixing cavity, a porous medium combustion chamber, a tubular heat exchanger group, a plate heat exchanger, a temperature control system and a waterway system, wherein the fuel air premixing cavity is communicated with the porous medium combustion chamber; the low-heating value gas fuel and the preheated air are fully mixed in the premixing cavity; two layers of porous medium layers with different apertures are filled in the inner cavity of the combustion chamber; the tail flue is provided with a tubular heat exchanger group; the air preheating pipeline coats the porous medium combustion chamber and the tail flue; the temperature control system regulates and controls the fan, the circulating water pump, the flow controller and each electromagnetic valve by obtaining feedback signals of each temperature sensor and each pressure sensor, so as to achieve the aim of controlling the water temperature. The invention provides heating water and domestic hot water for users by burning low-heat value gas in the porous medium furnace, thereby realizing high-efficiency and clean utilization of low-grade energy.
Description
Technical Field
The invention relates to porous medium combustion low-heating value gas, in particular to a household heating water heater based on porous medium combustion low-heating value gas.
Background
At present, China is in the stage of high-speed economic development, and the restriction of energy and environment on economic development is more and more obvious. In terms of energy utilization, on one hand, the problems of low efficiency, environmental pollution, serious waste and the like exist, and on the other hand, a large amount of low-grade energy is not fully developed and utilized. In order to establish an economic model of sustainable development, improve energy structure and energy consumption mode, and improve the effective utilization rate of energy, various low-calorific-value gas fuels in industrial production and energy production must be fully utilized.
For a long time, low-calorific value gas fuels, such as city gas, converter gas, producer gas, blast furnace gas and the like, contain a large amount of inert gas, have few combustible components, low calorific value and large volume flow of fuel, are difficult to ignite under the traditional free flame combustion condition, and are often directly discharged as waste gas. Direct evacuation not only causes energy waste, but also causes environmental pollution because the low-calorific-value gas contains benzene, carbon monoxide and other gases. The porous medium combustion technology which is emerging in recent years provides possibility for the combustion of low heating value gas. The porous medium has large specific surface area and good heat storage performance, can improve the combustion heat efficiency, expand the lean combustion limit and reduce the pollutant discharge, and is very suitable for the combustion of low-heat value gas fuel.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a household heating water heater based on porous medium combustion low-heating-value gas.
The invention relates to a household heating water heater based on porous medium combustion low-calorific-value gas. The fuel and the preheated air are fully mixed in the premixing cavity; two layers of porous medium layers with different apertures are filled in the inner cavity of the combustion chamber; the tail flue is provided with a tubular heat exchanger group; the air preheating pipeline coats the porous medium combustion chamber and the tail flue; the temperature control system regulates and controls the fan, the circulating water pump, the flow controller and each electromagnetic valve by obtaining feedback signals of each temperature sensor and each pressure sensor, so as to achieve the purpose of controlling the water temperature.
Further, the low heating value gas and the preheated air are fully mixed in the round table type premixing cavity.
Furthermore, the porous medium layer in the inner cavity of the combustion chamber is made of silicon carbide (SiC) foamed ceramic with porosity of 80%, the upstream part is a porous medium layer with 40PPI, and the downstream part is a porous medium layer with 20 PPI.
Furthermore, the pipe heat exchangers in the shape of a snake are arranged in parallel on the tail flue to form a pipe heat exchanger group.
Further, the air preheating pipeline coats the porous medium combustion chamber shell and the tail flue, and the outer surface of the air preheating pipeline is coated with a heat insulation material.
Furthermore, a preheating air nozzle is arranged at the tail part of the air preheating pipeline, the preheating air nozzle is inclined downwards by 30-45 degrees relative to the horizontal direction, and a layer of preheating air nozzles are uniformly arranged in a certain section along the circumferential direction.
Compared with the prior art, the invention has the beneficial effects that: (1) the porous medium combustion technology is adopted to combust the low heat value gas, so that powerful technical support is provided for the wide application of the low heat value gas fuel, and the national policy of energy conservation and emission reduction is met. (2) The cold air is sent into the air preheating pipeline through the fan to be preheated, and simultaneously, the preheated air and the fuel are mixed and disturbed in the circular table type premixing cavity, so that the stable combustion of the low-calorific-value gas fuel is facilitated. (3) The tail flue is provided with a tubular heat exchanger group, which is beneficial to the heat exchange between the circulating water and the high-temperature flue gas. (4) The cold water and the heated heating water exchange heat in the plate heat exchanger to obtain the domestic water with proper temperature.
Drawings
Fig. 1 is a schematic structural diagram of a domestic heating water heater combusting low-heating-value gas based on porous media according to the invention.
Fig. 2 is a schematic view of the overall shape of the burner.
Fig. 3 is a schematic layout of a tube heat exchanger package.
Description of reference numerals: 1-a cold air inlet; 2-a fan; 3-air preheating the pipeline; 4-tail flue; 5-circulating water outlet temperature sensor; 6-a water collector; 7-a porous medium combustion chamber; 8-a gas rectifier; 9-preheating air nozzle; 10-three-way valve; 11-heating water outlet electromagnetic valve; 12-heat exchanger inlet solenoid valve; 13-a plate heat exchanger; 14-domestic water outlet; 15-outlet of heating water; 16-an automatic bypass valve; 17-a heat exchanger water drain valve; 18-a circulating water inlet; 19-a cold water inlet; 20-a pressure sensor; 21-a water replenishing electromagnetic valve; 22-cold water inlet flow controller; 23-a gas inlet; 24-gas flow controller; 25-fuel-air premix chamber; 26-a circulating water pump; 27-automatic exhaust valve; 28-40PPI porous medium layer; 29-an electromagnetic ignition electrode; 30-20PPI porous medium layers; 31-a water separator; 32-insulating layer; 33-tube heat exchanger group; 34-circulating water inlet temperature sensor; 35-tail gas outlet.
Detailed Description
In order that the technical scheme of the invention can be better understood, the implementation of the invention is described in detail in the following with reference to the accompanying drawings.
The working principle of the invention is as follows: the low heating value gas of the user enters through a gas inlet 23, and is sent into a fuel-air premixing cavity 25 after the flow is regulated by a gas flow controller 24. The cold air is sent into the burner by the fan 2, and is sent into the fuel air premixing cavity 25 by the preheating air nozzle 9 after being preheated by the air preheating pipeline 3. The combustion zone is arranged with two layers of porous media, with an upstream layer of 40PPI porous media 28 for mixed gas preheating and a downstream layer of 20PPI porous media 30 for flame stabilization and reduced heat dissipation losses. The low heating value gas and air are fully disturbed and mixed in the fuel air premixing cavity 25, and then are sent into the porous medium layers 28 and 30 after passing through the gas rectifier 8. The mixed gas is ignited by the electromagnetic ignition electrode 29 and is stably combusted at the interface of the two layers of porous media. The high-temperature flue gas generated after combustion exchanges heat with the tubular heat exchanger group 33 to heat circulating water, and finally the tail gas is discharged from the tail gas outlet 35. The heating circulating water flows in from the circulating water inlet 18, is divided into a plurality of streams of fluid after passing through the circulating water pump 26 and the water separator 31, and flows into the tubular heat exchanger group 33 to be fully heated. A plurality of streams of fluid are gathered by the water collector 6 into one stream, and then divided into two streams of fluid by the three-way valve 10 and the adjustment of the two electromagnetic valves 11 and 12, one stream of fluid flows out through the heating water outlet 15 as heating pipe water supply, and the other stream of fluid flows into the plate heat exchanger 13. Cold water flows in from a cold water inlet 19, is sent into the plate heat exchanger 13 to be heated after the flow is regulated by a cold water inlet flow controller 22, and finally flows out from a domestic water outlet 14. The automatic exhaust valve 27 is used to exhaust the gas in the circulating water. The circulating water inlet temperature sensor 34 and the circulating water outlet temperature sensor 5 are used for monitoring the temperature of circulating water in real time and feeding back to the temperature control system. When the temperature measured by the circulating water outlet temperature sensor 5 is higher than a set value, the temperature control system adjusts the heat exchange amount of the high-temperature flue gas and the circulating water by reducing the gas amount flowing through the gas flow controller 24 and the air amount flowing through the fan 2, so that the temperature of the circulating water outlet reaches the set value. When the temperature measured by the circulating water outlet temperature sensor 5 is lower than a set value, the temperature control system adjusts the heat exchange amount of the high-temperature flue gas and the circulating water by increasing the gas amount flowing through the gas flow controller 24 and the air amount flowing through the fan 2, so that the circulating water outlet temperature reaches the set value. When the temperature measured by the circulating water inlet temperature sensor 34 is lower than the set value, the temperature control system adjusts the circulating water inlet temperature to the set value by increasing the opening degrees of the heating water outlet solenoid valve 11 and the automatic bypass valve 16. When the temperature measured by the circulating water inlet temperature sensor 34 is higher than the set value, the temperature control system adjusts the circulating water inlet temperature to the set value by reducing the opening degrees of the heating water outlet solenoid valve 11 and the automatic bypass valve 16. The pressure sensor 20 is used for monitoring the water pressure of the circulating water in real time and feeding back the water pressure to the temperature control system, when the parameter of the pressure sensor 20 is lower than a set value, the temperature control system opens the electromagnetic water replenishing valve 21 to replenish the circulating water, and when the water pressure reaches the set value, the valve is closed.
The invention has the innovation points that a reasonable household heating water heater is designed for burning low-heat-value gas, so that heating water and domestic hot water are provided for users, and technical support is provided for development and utilization of low-heat-value gas fuel (such as city gas, converter gas, generator gas, blast furnace gas and the like). In addition, the porous medium heating water heater is used for combusting low-heat-value gas, so that the combustion efficiency is high, the temperature of the flame front is relatively low, the discharge of NOx and CO is greatly reduced, the efficient clean utilization of low-heat-value fuel is realized, and the environmental protection requirement is met.
The foregoing description illustrates the general principles of the invention, its essential features and advantages, and should not be taken as limiting the scope of the invention. The principles and features of this invention have been described in the foregoing specification only and it is to be understood that numerous changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A household heating water heater based on porous medium combustion low-heating-value gas comprises a fuel air premixing cavity, a porous medium combustion chamber, a tubular heat exchanger group, a plate heat exchanger, a temperature control system and a waterway system; the low-heating value gas fuel and the preheated air are fully mixed in the premixing cavity; two layers of porous medium layers with different apertures are filled in the inner cavity of the combustion chamber; the tail flue is provided with a tubular heat exchanger group; the air preheating pipeline coats the porous medium combustion chamber and the tail flue; the temperature control system regulates and controls the fan, the circulating water pump, the flow controller and each electromagnetic valve by obtaining feedback signals of each temperature sensor and each pressure sensor, so as to achieve the aim of controlling the water temperature.
2. The domestic heating water heater based on porous medium burning low heating value gas of claim 1, characterized in that: the low heating value gas and the preheated air are fully mixed in the round table type premixing cavity.
3. The domestic heating water heater based on porous medium burning low heating value gas of claim 1, characterized in that: the porous medium layer in the inner cavity of the combustion chamber is made of silicon carbide (SiC) foamed ceramic with porosity of 80%, the porous medium layer with 40PPI at the upstream and the porous medium layer with 20PPI at the downstream.
4. The domestic heating water heater based on porous medium burning low heating value gas of claim 1, characterized in that: the coil heat exchangers in the shape of snakes are arranged in parallel in the cylindrical tail flue to form a coil heat exchanger group.
5. The domestic heating water heater based on porous medium burning low heating value gas of claim 1, characterized in that: the air preheating pipeline is coated with the porous medium combustion chamber shell and the tail flue, and the outer surface of the air preheating pipeline is coated with a heat insulation material.
6. The domestic heating water heater based on porous medium burning low heating value gas of claim 5, characterized in that: the tail part of the air preheating pipeline is provided with a preheating air nozzle which is inclined 30-45 degrees downwards relative to the horizontal direction, and a layer of preheating air nozzles are uniformly arranged in a certain section along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911073600.XA CN110762832A (en) | 2019-11-06 | 2019-11-06 | Domestic heating water heater based on porous medium burning low-heating-value gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911073600.XA CN110762832A (en) | 2019-11-06 | 2019-11-06 | Domestic heating water heater based on porous medium burning low-heating-value gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110762832A true CN110762832A (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911073600.XA Pending CN110762832A (en) | 2019-11-06 | 2019-11-06 | Domestic heating water heater based on porous medium burning low-heating-value gas |
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| CN (1) | CN110762832A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413478A (en) * | 2022-01-17 | 2022-04-29 | 中国市政工程华北设计研究总院有限公司 | Condensing type household gas water heater suitable for pure hydrogen source |
| CN115264940A (en) * | 2022-06-09 | 2022-11-01 | 中国计量大学 | Self-preheating type porous medium catalytic combustion hot water device |
-
2019
- 2019-11-06 CN CN201911073600.XA patent/CN110762832A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413478A (en) * | 2022-01-17 | 2022-04-29 | 中国市政工程华北设计研究总院有限公司 | Condensing type household gas water heater suitable for pure hydrogen source |
| CN115264940A (en) * | 2022-06-09 | 2022-11-01 | 中国计量大学 | Self-preheating type porous medium catalytic combustion hot water device |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200207 |
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| WD01 | Invention patent application deemed withdrawn after publication |