CN217111533U - Ammonia-hydrogen mixed natural gas combustion boiler test platform - Google Patents
Ammonia-hydrogen mixed natural gas combustion boiler test platform Download PDFInfo
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- CN217111533U CN217111533U CN202221013707.2U CN202221013707U CN217111533U CN 217111533 U CN217111533 U CN 217111533U CN 202221013707 U CN202221013707 U CN 202221013707U CN 217111533 U CN217111533 U CN 217111533U
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Abstract
The utility model discloses an ammonia-hydrogen mixed natural gas combustion boiler test platform, test platform includes the natural gas storage tank, the hydrogen storage tank, liquid ammonia storage tank and liquid ammonia heating system, the multicomponent gas burner of installation is connected on natural gas storage tank and the gas boiler, the multicomponent gas burner of installation is connected and is equipped with the hydrogen flow control valve on the connecting pipeline on hydrogen storage tank and the gas boiler, the liquid ammonia storage tank is connected with the ammonia pump, the ammonia pump export is connected with liquid ammonia heating system, liquid ammonia heating system can heat the ammonia for the temperature of predetermineeing with the liquid ammonia, liquid ammonia heating system's export and multicomponent gas burner are connected and are equipped with the ammonia flow control valve on the connecting pipeline. The utility model discloses can realize zero carbon and discharge, this system is rational in infrastructure simultaneously, has the characteristics that produce heat gradable matching utilizes, provides a thinking for the development of industrial boiler afterwards.
Description
Technical Field
The utility model belongs to the technical field of gas combustion technique and test, concretely relates to ammonia-hydrogen mixed natural gas combustion boiler test platform.
Background
The adoption of non-carbon fuel instead of fossil fuel is one of effective carbon emission reduction modes, and two non-carbon fuels, namely hydrogen and ammonia, are mainly adopted. Hydrogen energy is a clean energy source in fuel energy, is valued and utilized by people, and can be obtained by electrolyzing renewable energy sources; but face the problems of low density, low heat per unit volume and difficulty in large-scale transportation and storage. The ammonia gas is a good carrier of hydrogen energy, has high liquefaction temperature, and has the advantages of low cost of converting hydrogen gas, sufficient supply and the like.
The hydrogen has the characteristics of high combustion speed, wide combustion limit, small specific heat value, long quenching length and the like; the ammonia gas has the characteristics of slow combustion speed in air, instability, difficult ignition and the like; liquefaction temperatures include safe pressurization, liquefaction and combustion. The combustion of hydrogen and ammonia has complementarity, the prior pulverized coal boiler mixed combustion ammonia early-stage test research exists in China at present, but no boiler for mixed combustion of hydrogen, ammonia, natural gas and other multi-gas fuels exists, so that a multi-gas fuel boiler combustion test platform is designed, and therefore, it is necessary to fully know the combustion and heat exchange performance of the natural gas mixed combustion of hydrogen and ammonia and the pollutant emission concentration rule.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an ammonia-hydrogen mixed natural gas combustion boiler test platform, because ammonia and hydrogen are non-carbon fuel, the utility model discloses can realize zero carbon and discharge, this system is rational in infrastructure simultaneously, has the characteristics that produce heat gradable matching utilizes, provides a thinking for the development of industrial boiler afterwards.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an ammonia-hydrogen mixes natural gas combustion boiler test platform, including the natural gas storage tank, the hydrogen storage tank, liquid ammonia storage tank and liquid ammonia heating system, the multicomponent gas burner of installation is connected on natural gas storage tank and the gas boiler, the multicomponent gas burner of installation is connected and is equipped with the hydrogen flow control valve on the connecting pipeline on hydrogen storage tank and the gas boiler, the liquid ammonia storage tank is connected with the ammonia pump, the ammonia pump export is connected with liquid ammonia heating system, liquid ammonia heating system can heat the ammonia for the temperature of predetermineeing with the liquid ammonia, liquid ammonia heating system's export and multicomponent gas burner are connected and are equipped with the ammonia main flow control valve on the connecting pipeline.
Preferably, the outlet of the natural gas storage tank is provided with a natural gas flow regulating valve.
Preferably, an outlet of the ammonia water pump is provided with a liquid ammonia flow regulating valve.
Preferably, the liquid ammonia heating system comprises an ammonia-flue gas heat exchanger, a liquid ammonia-flue gas heat exchanger, a low-temperature ammonia buffer tank and a high-temperature ammonia buffer tank, wherein the ammonia-flue gas heat exchanger is arranged in a flue of the gas-fired boiler and is positioned at the downstream of the economizer, and the liquid ammonia-flue gas heat exchanger is arranged in the flue of the gas-fired boiler and is positioned at the downstream of the ammonia-flue gas heat exchanger; the outlet of the ammonia water pump is connected with the inlet of the liquid ammonia-flue gas heat exchanger, the outlet of the liquid ammonia-flue gas heat exchanger is connected with the inlet of the low-temperature ammonia buffer tank, the outlet of the low-temperature ammonia buffer tank is connected with the inlet of the ammonia gas-flue gas heat exchanger, the outlet of the ammonia gas-flue gas heat exchanger is connected with the inlet of the high-temperature ammonia buffer tank, the outlet of the high-temperature ammonia buffer tank is connected with the multi-component gas burner and is provided with the ammonia main flow regulating valve, and the outlet of the low-temperature ammonia buffer tank is provided with the low-temperature ammonia main flow regulating valve.
Preferably, a communicating pipeline is arranged between the outlet of the low-temperature ammonia buffer tank and the inlet of the high-temperature ammonia buffer tank, and a low-temperature ammonia branch flow regulating valve is arranged on the communicating pipeline.
Preferably, the multi-component gas burner comprises a first multi-component gas burner and a second multi-component gas burner arranged below the first multi-component gas burner, and the outlet of the natural gas storage tank, the outlet of the hydrogen storage tank and the outlet of the liquid ammonia heating system are divided into two paths and are respectively connected with the first multi-component gas burner and the second multi-component gas burner.
Preferably, the gas ports in the multi-component gas burner are arranged as separate ports for each gas or as a common port for all gases.
The utility model discloses following beneficial effect has:
the utility model discloses among the mixed natural gas burning boiler test platform of ammonia-hydrogen, when needs are experimental, spout into furnace burning through hydrogen, ammonia, the natural gas with different ratios through the combustor, the heat that the burning produced is used for heating the interior heating surface working medium of boiler, and the high temperature high pressure working medium that is heated is used for generating electricity or externally supplies vapour. The key technology of clean and efficient combustion of hydrogen-rich gas such as hydrogen, ammonia and the like is mastered through different mixing proportions of ammonia and hydrogen. The method comprises the combustion characteristics and reaction mechanism of hydrogen, ammonia and natural gas blended combustion fuel; the burner of the hydrogen-rich blended fuel has the characteristics of dynamic working condition combustion and pollutant generation; adjusting the combustion width load of the blended fuel, and the like. Liquid ammonia can be gasified and heated through the two-stage ammonia gas heat exchanger, and the combustion is easy; meanwhile, the energy saver is arranged to reduce the temperature of the flue gas, so that the temperature of the flue gas is reduced to be lower than the dew point temperature of water, the latent heat of vaporization of water vapor in the flue gas is fully utilized, and the overall efficiency of the boiler is improved. From the foregoing, the utility model discloses ammonia-hydrogen mixed natural gas combustion boiler test platform can be to mixing the hydrogen/ammonia research of burning, and this system has simple structure, the emission is extremely low and the characteristics that the burning generated the result and can utilize multipurposely simultaneously, provides an idea for the development of industrial boiler afterwards. The utility model discloses in, the heat of input boiler is almost utilized by whole, only discharges a small amount of low temperature flue gas, has still realized the heat recovery comprehensive utilization of flue gas when realizing that the carbon dioxide emission reduces by a wide margin, has good society, economy and environmental protection benefit.
Drawings
FIG. 1 is a schematic structural diagram of the test platform of the ammonia-hydrogen mixed natural gas combustion boiler of the present invention.
The system comprises a natural gas storage tank 1, a hydrogen storage tank 2, a liquid ammonia storage tank 3, a low-temperature ammonia buffer tank 4-1, a high-temperature ammonia buffer tank 4-2, a gas boiler 5, a multi-component gas burner 5-1, a water wall 5-2, a convection heat exchange surface 5-3, an economizer 5-4, an air preheater 5-5, an ammonia-flue gas heat exchanger 5-6, a liquid ammonia-flue gas heat exchanger 6, an ammonia main flow regulating valve 7, a liquid ammonia flow regulating valve 7-1, a low-temperature ammonia main flow regulating valve 7-2, a low-temperature ammonia branch flow regulating valve 7-3, a hydrogen flow regulating valve 8, a natural gas flow regulating valve 9, a flue gas sampling measuring hole 10 and an ammonia water pump 11.
Detailed Description
Referring to fig. 1, the utility model discloses ammonia-hydrogen mixed natural gas combustion boiler test platform includes natural gas storage tank 1, hydrogen storage tank 2, liquid ammonia storage tank 3, low temperature ammonia buffer tank 4-1, high temperature ammonia buffer tank 4-2, gas boiler 5, multicomponent gas burner 5-1, water-cooling wall 5-2, convection heat-transfer surface 5-3, economizer 5-4, air heater 5-5, ammonia-gas heat exchanger 5-6, liquid ammonia-gas heat exchanger 6, ammonia main flow control valve 7, liquid ammonia flow control valve 7-1, low temperature ammonia main flow control valve 7-2, low temperature ammonia branch road flow control valve 7-3, hydrogen flow control valve 8, natural gas flow control valve 9 and flue gas sampling measuring hole 10.
The natural gas storage tank 1, the hydrogen storage tank 2 and the high-temperature ammonia buffer tank 4-2 are respectively communicated with the multi-component gas burner 5-1 through a natural gas flow regulating valve 9, a hydrogen flow regulating valve 8 and an ammonia flow regulating valve 7, various independent gas nozzles are arranged in the multi-component gas burner 5-1, and various fuels can independently enter the burner for burning or can simultaneously enter the burner for burning. The boiler is sequentially provided with a water-cooled wall 5-2, a convection heat exchange surface 5-3, an economizer 5-4, an air preheater 5-5, an ammonia-flue gas heat exchanger 5-6, a liquid ammonia-flue gas heat exchanger 6 and a flue gas sampling measuring hole 10 along the flow direction of flue gas.
The ammonia heat exchanger comprises an ammonia-flue gas heat exchanger 5-6 and a liquid ammonia-flue gas heat exchanger 6, and when the system is not used for putting ammonia gas for combustion, all the flue gas directly passes through the ammonia-flue gas heat exchanger 5-6 without passing through an air preheater 5-5. When the system is used for ammonia gas combustion, one part of flue gas flows through the air preheater 5-5, the other part of flue gas flows through the ammonia gas-flue gas heat exchanger 5-6, and then the two parts of low-temperature flue gas are converged and flow through the liquid ammonia-flue gas heat exchanger 6.
A liquid ammonia inlet of the liquid ammonia-flue gas heat exchanger 6 is connected with a liquid ammonia storage tank 3 through a liquid ammonia flow regulating valve 7-1 and an ammonia pump 11, the ammonia pump 11 provides power for the flow of ammonia water and ammonia, the liquid ammonia flow regulating valve 7-1 can be omitted when the ammonia pump 11 is a variable frequency pump or a flow control pump, an outlet of the low-temperature ammonia buffer tank 4-1 is connected with an inlet of the low-temperature ammonia buffer tank 4-1, and in work, low-temperature ammonia gas generated by heating and gasifying liquid ammonia by low-temperature flue gas flowing through the liquid ammonia-flue gas heat exchanger 6 enters the low-temperature ammonia buffer tank 4-1; a low-temperature ammonia gas inlet of the ammonia gas-flue gas heat exchanger 5-6 is connected with an outlet of a low-temperature ammonia gas buffer tank 4-1 through a low-temperature ammonia gas main path flow regulating valve 7-2, a high-temperature ammonia gas outlet is connected with an inlet of a high-temperature ammonia gas buffer tank 4-2, and when the high-temperature ammonia gas-flue gas heat exchanger works, low-temperature ammonia gas is heated by high-temperature flue gas flowing through the ammonia gas-flue gas heat exchanger 5-6 and then enters the high-temperature ammonia gas buffer tank 4-2; a branch pipeline is arranged between the low-temperature ammonia buffer tank 4-1 and the high-temperature ammonia buffer tank 4-2, and a low-temperature ammonia branch flow regulating valve 7-3 is arranged on the pipeline and used for regulating the temperature of ammonia entering the high-temperature ammonia buffer tank 4-2 during working.
Natural gas is used as ignition and stable combustion fuel, ammonia gas and hydrogen gas are used as mixed combustion fuel and enter a hearth through a combustor, smoke is discharged out of a boiler after heat exchange is carried out on the smoke through a water-cooled wall, a convection heat exchange surface, an economizer, an air preheater and an ammonia gas heat exchanger, and the smoke temperature and the emission of pollutants in the smoke are measured through a smoke sampling measuring hole 10.
When the boiler is started in a cold state or a hot state, the natural gas storage tank 1 supplies natural gas to the multi-component gas combustor 5-1 to be combusted in the gas boiler 5, the formed high-temperature flue gas is used for heating working medium on the heating surface in the natural gas boiler, and the heated high-temperature high-pressure working medium is used for generating power or supplying gas to the outside; after the parameters of the gas boiler 5 are stable, in order to measure the pollutant emission concentration of the flue gas at the tail part of the gas boiler 5 under different blending combustion ratios of ammonia gas or/and hydrogen gas, different blending combustion ratios can be realized by adjusting an ammonia gas main flow regulating valve 7 and a liquid ammonia flow regulating valve 7-1 or/and a hydrogen flow regulating valve 8, and then the flue gas is collected through a flue gas sampling measuring hole 10 to analyze the pollutant emission concentration; in order to measure the pollutant emission concentration of ammonia gas at different temperatures to the flue gas at the tail part of the boiler under a certain ammonia-hydrogen blending combustion ratio, the flow ratio of low-temperature ammonia gas and high-temperature ammonia gas can be adjusted by adjusting a low-temperature ammonia gas main path flow adjusting valve 7-2 and a low-temperature ammonia gas branch path flow adjusting valve 7-3 to realize temperature change, and then the flue gas is collected through a flue gas sampling measuring hole 10 to analyze the pollutant emission concentration. Finally, the law of the influence of the natural gas doped with hydrogen/ammonia, the natural gas doped with hydrogen and ammonia and the temperature of ammonia on the combustion characteristics and the pollutant emission concentration is mastered. The flue gas after heat exchange of the gas boiler hearth firstly passes through the hearth, a convection heat exchange surface, an economizer, an air preheater and an ammonia gas heat exchanger; the ultralow temperature flue gas passing through the ammonia gas heat exchanger is discharged through a water removing device after the temperature of the ultralow temperature flue gas is lower than the water dew point, so that the discharge amount is reduced.
The utility model discloses can mix the hydrogen/ammonia of burning out to the natural gas and carry out the systematic study, have simple structure, pollutant emission extremely low and combustion products can synthesize the characteristics of high-efficient utilization. The utility model discloses in, the heat of input boiler is almost utilized by whole, only discharges a small amount of low temperature flue gas, has still realized the heat recovery comprehensive utilization of flue gas when realizing that the carbon dioxide emission reduces by a wide margin, has good society, economy and environmental protection benefit.
Claims (7)
1. A test platform for an ammonia-hydrogen mixed natural gas combustion boiler is characterized by comprising a natural gas storage tank (1) and a hydrogen storage tank (2), liquid ammonia storage tank (3) and liquid ammonia heating system, polycomponent gas burner (5-1) of installation are connected on natural gas storage tank (1) and gas boiler (5), hydrogen storage tank (2) are connected and are equipped with hydrogen flow control valve (8) on the connecting pipeline with polycomponent gas burner (5-1) of installation on gas boiler (5), liquid ammonia storage tank (3) are connected with ammonia water pump (11), ammonia water pump (11) export is connected with liquid ammonia heating system, liquid ammonia heating system can be the ammonia of predetermineeing the temperature with the liquid ammonia heating, liquid ammonia heating system's export and polycomponent gas burner (5-1) are connected and are equipped with ammonia main flow control valve (7) on the connecting pipeline.
2. The test platform for the ammonia-hydrogen mixed natural gas combustion boiler as claimed in claim 1, wherein the outlet of the natural gas storage tank (1) is provided with a natural gas flow regulating valve (9).
3. The test platform for the ammonia-hydrogen mixed natural gas combustion boiler as claimed in claim 1, wherein the outlet of the ammonia water pump (11) is provided with a liquid ammonia flow regulating valve (7-1).
4. The ammonia-hydrogen mixed natural gas combustion boiler test platform as claimed in claim 1, wherein the liquid ammonia heating system comprises an ammonia-gas heat exchanger (5-6), a liquid ammonia-gas heat exchanger (6), a low-temperature ammonia buffer tank (4-1) and a high-temperature ammonia buffer tank (4-2), the ammonia-gas heat exchanger (5-6) is arranged in a flue of the gas boiler and is located at the downstream of the economizer (5-4), and the liquid ammonia-gas heat exchanger (6) is arranged in the flue of the gas boiler and is located at the downstream of the ammonia-gas heat exchanger (5-6); an outlet of the ammonia water pump (11) is connected with an inlet of the liquid ammonia-flue gas heat exchanger (6), an outlet of the liquid ammonia-flue gas heat exchanger (6) is connected with an inlet of the low-temperature ammonia buffer tank (4-1), an outlet of the low-temperature ammonia buffer tank (4-1) is connected with an inlet of the ammonia-flue gas heat exchanger (5-6), an outlet of the ammonia-flue gas heat exchanger (5-6) is connected with an inlet of the high-temperature ammonia buffer tank (4-2), an outlet of the high-temperature ammonia buffer tank (4-2) is connected with the multi-component gas combustor (5-1) and is provided with the ammonia main flow regulating valve (7), and an outlet of the low-temperature ammonia buffer tank (4-1) is provided with the low-temperature ammonia main flow regulating valve (7-2).
5. The test platform for the ammonia-hydrogen mixed natural gas combustion boiler according to claim 4, characterized in that a communicating pipeline is arranged between the outlet of the low-temperature ammonia buffer tank (4-1) and the inlet of the high-temperature ammonia buffer tank (4-2), and the communicating pipeline is provided with a low-temperature ammonia branch flow regulating valve (7-3).
6. The test platform for the ammonia-hydrogen mixed natural gas combustion boiler according to claim 1, wherein the multi-component gas burner (5-1) comprises a first multi-component gas burner and a second multi-component gas burner arranged below the first multi-component gas burner, and an outlet of the natural gas storage tank (1), an outlet of the hydrogen storage tank (2) and an outlet of the liquid ammonia heating system are divided into two paths and are respectively connected with the first multi-component gas burner and the second multi-component gas burner.
7. An ammonia-hydrogen mixed natural gas combustion boiler test platform according to claim 1, characterized in that the gas nozzles in the multi-component gas burner (5-1) are arranged as separate nozzles for each gas or as a common nozzle for all gases.
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| CN202221013707.2U CN217111533U (en) | 2022-04-28 | 2022-04-28 | Ammonia-hydrogen mixed natural gas combustion boiler test platform |
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| CN202221013707.2U CN217111533U (en) | 2022-04-28 | 2022-04-28 | Ammonia-hydrogen mixed natural gas combustion boiler test platform |
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