Tail flue gas utilization system

Abstract

The utility model discloses a tail flue gas utilization system. Tail smoke is discharged into the atmosphere, thermal pollution is easily generated, the temperature of smoke at an inlet of an absorption tower is too high, the absorption tower can catch fire, huge accidents are caused, and then great economic losses are generated. The device comprises a flue gas waste heat cooler, a domestic water heater and a water supplementing tank, a waste heat flue gas inlet pipe is communicated with a flue gas inlet of the flue gas waste heat cooler, a heat exchange water outlet of the flue gas waste heat cooler is communicated with a water outlet pipe, the water outlet pipe is communicated with a main water pipe, the main water pipe is communicated to an inlet of a water mixing pipe, and the water mixing pipe is communicated with the water supplementing tank. An outlet of the water mixing pipe is communicated to an inlet of a domestic water heater, a water outlet of the domestic water heater is communicated with a circulating drain pipe, and the circulating drain pipe is communicated to a water inlet of the flue gas waste heat cooler. The tail smoke utilization device is used for tail smoke utilization.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tail flue gas utilization system. BACKGROUND

[0002] At present, the tail flue gas of thermal power plant enters the absorption tower and then is discharged into the chimney and then is discharged into the atmosphere, the flue gas temperature of the absorption tower outlet is about fifty degrees, the tail flue gas temperature at the absorption tower inlet is about one hundred degrees, the fifty degrees of tail flue gas is discharged into the atmosphere, easy to produce heat pollution, and the high temperature of the absorption tower inlet flue gas can cause the absorption tower to catch fire, cause huge accident, and further produce great economic loss. SUMMARY

[0003] The utility model discloses to make up for the deficiency of prior art, provide a tail flue gas utilization system.

[0004] The above-mentioned purpose is realized by the following technical scheme:

[0005] A tail flue gas utilization system, its composition includes: flue gas waste heat cooler, domestic water heater and water supply tank, the waste heat flue gas comes to the pipe and the flue gas inlet of waste heat cooler is linked together, the heat exchange water outlet of waste heat cooler is linked together with the water outlet pipe, the water outlet pipe is linked together with the main water pipe, the main water pipe is linked together to the inlet of mixed water pipe, the outlet of mixed water pipe is linked together to the inlet of domestic water heater, the water outlet of domestic water heater is linked together with the circulating drainage pipe, the circulating drainage pipe is linked together to the water inlet of waste heat cooler.

[0006] The tail flue gas utilization system, the water supply tank is linked together with the water supply pipe, the water supply pipe is linked together to the circulating drainage pipe, the water supply pipe is linked together with the heat exchange water pipe, the heat exchange water pipe is linked together to the inlet of mixed water pipe.

[0007] The tail flue gas utilization system, the mixed water temperature sensor is installed on the mixed water pipe. Advantages

[0008] 1. The utility model discloses through flue gas waste heat cooler, heats a part of water, through circulating pump pressurization and sends to domestic water heater, when not reaching the temperature required, again heats the water after heat exchange through domestic water heater, saves the power consumption of heater, also reduces the heat loss of tail flue gas discharge. BRIEF DESCRIPTION OF DRAWINGS

[0009] Attached Figure 1 It is the principle diagram of the utility model;

[0010] Figure: 1, the waste heat flue gas into the pipe; 2, flue gas waste heat cooler; 3, water outlet pipe; 4, main water pipe; 5, inlet temperature sensor; 6, mixed water temperature sensor; 7, flow regulating valve; 8, heat exchange water pipe; 9, water inlet pipe; 10, water pipe; 11, domestic water heater; 12, mixed water pipe; 13, circulating drain pipe; 14, water replenishing pipe; 15, water replenishing tank. DETAILED DESCRIPTION

[0011] REFERENCE Figure 1 A tail flue gas utilization system, which consists of: flue gas waste heat cooler 2, domestic water heater 11 and water replenishing tank 15, waste heat flue gas into the pipe 1 and the flue gas inlet of the flue gas waste heat cooler communicate, the heat exchange water outlet of the flue gas waste heat cooler and the water outlet pipe 3 communicate, the water outlet pipe and the main water pipe 4 communicate, the main water pipe communicates to the inlet of the mixed water pipe 12, the outlet of the mixed water pipe communicates to the inlet of the domestic water heater, the water outlet of the domestic water heater and the circulating drain pipe 13 communicate, the circulating drain pipe communicates to the water inlet of the flue gas waste heat cooler.

[0012] The tail flue gas utilization system, the water replenishing tank communicates the water replenishing pipe 14, the water replenishing pipe communicates to the circulating drain pipe, the water replenishing pipe and the heat exchange water pipe 8 communicate, the heat exchange water pipe communicates to the inlet of the mixed water pipe.

[0013] The tail flue gas utilization system, the mixed water pipe is installed with mixed water temperature sensor 6.

[0014] Working principle: the boiler tail flue gas enters into the flue gas waste heat cooler through the waste heat flue gas into the pipe, the water of the domestic water heater outlet enters into the flue gas waste heat cooler through the circulating drain pipe, the flue gas and the water carry out heat exchange, heat the domestic water, the water after heating flows to the main water pipe through the water outlet pipe, the main water pipe is installed with inlet temperature sensor 5, after measuring the temperature, if the temperature exceeds the temperature required by the user, the heat exchange water pipe is started, the cold water in the water replenishing tank enters into the mixed water pipe through the heat exchange water pipe, the water in the main water pipe also enters into the mixed water pipe, the mixed water pipe is installed with mixed water temperature sensor, can monitor the temperature of the water after mixing in real time, at the same time, the heat exchange water pipe is installed with flow regulating valve, can regulate the water replenishing flow, to regulate the temperature of the water after mixing, when the mixed water temperature basically reaches the temperature required by the user, the water flows out to the circulating drain pipe through the domestic water heater, at this time, the domestic water heater does not start, the user can open the water pipe 10 to carry out water use, after using water, the water discharged through the domestic water heater reenters into the flue gas waste heat cooler to carry out heat exchange with the flue gas through the circulating drain pipe.

[0015] When the temperature of the inlet temperature sensor does not reach the required temperature of the user after the heat exchange between the smoke and the water, the heat exchange water pipe is not opened, the heat exchanged water enters the main water pipe, and then enters the domestic water heater through the mixing water pipe. The domestic water heater is started to heat the heat exchanged domestic water, and after heating to the required temperature, the user uses the water. The water used by the user is supplemented through the water supplement tank 15 and the water supplement pipe.

Claims

1. A tail gas utilization system characterized by: The composition comprises: flue gas waste heat cooler, domestic water heater and water supply tank, the flue gas waste heat cooler is communicated with the flue gas inlet, the heat exchange water outlet of the flue gas waste heat cooler is communicated with the outlet pipe, the outlet pipe is communicated with the main water pipe, the main water pipe is communicated with the inlet of the mixing water pipe, the outlet of the mixing water pipe is communicated with the inlet of the domestic water heater, the water outlet of the domestic water heater is communicated with the circulating drainage pipe, and the circulating drainage pipe is communicated with the water inlet of the flue gas waste heat cooler.

2. A system for utilizing tail gas according to claim 1, characterized in that: The water supply tank is communicated with the water supply pipe, the water supply pipe is communicated with the circulating drainage pipe, the water supply pipe is communicated with the heat exchange water pipe, and the heat exchange water pipe is communicated with the inlet of the mixing water pipe.

3. A system for utilizing tail gas according to claim 2, characterized in that: The mixing water pipe is provided with a mixing water temperature sensor.

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