Test solutions: The system of the two conditions were tested, condition 1 is not turned on flue gas heat recovery system 2 is on condition flue gas heat recovery systems. Analysis of the effect of heat recovery based on two sets of test quantitative results. Provided in the flue gas waste heat recovery system sampling aperture, the effective sampling aperture inner diameter of 100mm, an opening position in FIG 1 A, B, as shown, A point C is located in the exhaust port of the three big boiler shop sheffield boiler installations yells, B point is absorption heat pump at the exhaust port, C total point is located at the outlet of the chimney. A, B data points and checking for routine analysis, the main data point for C 4.2 test data analysis system herein Condition 1: waste heat recovery system is shut down, only the operation of the gas boiler. The operating conditions, the fuel consumption of 1572m3 / h, for a total heat of 14.0MW. 2 system conditions: heat recovery system is turned on, the gas absorption heat pump and boiler operating simultaneously. The conditions, gas boiler fuel consumption of 1572m3 / h, the fuel consumption of the absorption heat pump 358.5m3 / h, for a total system heat of 19.01MW, wherein heat for boiler feed 14MW, waste heat recovery system for heat is 01MW (where the flue gas-containing waste heat 1.9MW). Condition 2 Condition 1 as compared with the system for the fuel consumption per unit of heat (1MW · h) reduced by the gas 112.3m3 to 101.6m3, energy-saving heating rate, 9.5%. Energy-saving heating rate is equal to 2 gas consumption condition is worse than the condition of gas consumption and a condition of a gas consumption. Table 1, analysis conditions of the two gas sampling data is a total chimney outlet (C point) were compared. Table 1 is a conversion value *, is the conversion rate of NOx emission conditions to the NOx emission rate of 1 and 2 under the same conditions for the supply of heat conditions. Table 1 NOx emission factor is defined as the mass per 1m3 gas after combustion emissions. As can be seen, the same gas consumption 1m3, condition 2 73% reduction in emission factor than the case 1.

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