CN209672878U - A kind of wisdom pipe network system of controllable flue gas waste heat recovery - Google Patents

Abstract

The utility model discloses a kind of wisdom pipe network systems of controllable flue gas waste heat recovery, including flue gas main pipeline, the outlet end of the flue gas main pipeline is connected with the heat exchanging chamber entrance of heat-exchanger rig, several heat exchanger tubes are equipped in the heat exchanging chamber of the heat-exchanger rig, the heat exchanging chamber of the heat-exchanger rig is stretched out at the both ends of the heat exchanger tube, one end of the heat exchanger tube is connected with cold water main pipe, the other end is connected with return water supervisor, the heat exchanging chamber outlet of the heat-exchanger rig is connected with smoke discharging pipe, the outlet end of the smoke discharging pipe is equipped with temperature sensor, for detecting the temperature of smoke evacuation, the cold water main pipe is equipped with water-delivery pump；Utility model has the advantages that realizing the adjusting control of waste heat recycling, utilization rate of waste heat is high.

Description

A smart pipe network system with controllable and adjustable flue gas waste heat recovery

technical field

The utility model relates to a waste heat recovery device, in particular to a controllable and adjustable smart pipe network system for recovering waste heat from flue gas, which belongs to the field of waste heat recovery devices.

Background technique

High-temperature waste gas is often produced in the industrial production process, and these high-temperature waste gas will be directly discharged into the air to cause air pollution, and the heat in the flue gas is also wasted, wasting energy. The Chinese utility model patent titled "A flue gas waste heat recovery device" with the application number "201820046619.X" discloses a flue gas waste heat recovery device, including: a recovery box, several heat exchange tubes, a filter pad, and a purification box , a water inlet distributor, a water outlet distributor and a spraying device, the opposite ends of the recovery box are provided with an air inlet and an air outlet, the filter pad is arranged at the air outlet, and the air inlet and the air outlet of the purification box Relatively set, and the air inlet of the purification box is closed and communicated with the air outlet of the recovery box; several heat exchange tubes are evenly arranged in the recovery box, and the two ends of all heat exchange tubes extend out of the other two ends of the recovery box; the water distribution The water distributor communicates with the water inlet of each heat exchange tube; the water outlet distributor communicates with the water outlet of each heat exchange tube; the spray device is arranged in the purification box to purify the flue gas. However, the device cannot realize adjustment and control for the recovery of waste heat, and the utilization rate of waste heat is low.

Contents of the invention

In order to solve the above problems, the utility model designs a controllable and adjustable smart pipe network system for waste heat recovery of flue gas, which realizes the adjustment and control of waste heat recovery and has a high utilization rate of waste heat.

The technical scheme of the utility model is:

A controllable and adjustable smart pipe network system for waste heat recovery of flue gas, comprising a main flue gas pipe, the outlet end of the main flue gas pipe is connected to the entrance of the heat exchange chamber of the heat exchange device, and the heat exchange device of the heat exchange device There are several heat exchange tubes inside the heat chamber, the two ends of the heat exchange tubes protrude from the heat exchange chamber of the heat exchange device, one end of the heat exchange tubes is connected with the cold water main pipe, and the other end is connected with the return water The main pipe is connected, the outlet of the heat exchange chamber of the heat exchange device is connected with the smoke exhaust pipe, the outlet end of the smoke exhaust pipe is provided with a temperature sensor for detecting the temperature of the exhaust smoke, and the cold water main pipe is provided with a water delivery pump , used to control the speed of water, through the flow speed of water to adjust the heat exchange with flue gas, and then realize the regulation and control of flue gas temperature.

The water transfer pump is provided with a water transfer pump controller, the input end of the water transfer pump controller is electrically connected to the output end of the temperature sensor, and the output end of the water transfer pump controller is connected to the control of the water transfer pump. According to the detected temperature of the temperature sensor, the water delivery pump controller controls the water delivery volume of the water delivery pump.

The outlet end of the smoke exhaust pipe is provided with a smoke exhaust valve, and the amount of smoke discharge is adjusted through the smoke exhaust valve.

The outside of the smoke exhaust pipe is also provided with a temperature-regulating sleeve, and a spiral partition is provided between the temperature-regulating sleeve and the smoke exhaust pipe, and the spiral partition is spirally wound on the outer wall of the smoke exhaust pipe , the outlet end of the temperature regulating sleeve is connected with the induced fan pipe, and the air is spirally flowed outside the smoke exhaust pipe through the induced fan, and then the air cooling is performed on the smoke exhaust pipe to realize temperature adjustment and control. By adopting the spiral partition, the flow distance of the wind is increased, and the heat dissipation speed of the smoke exhaust pipe is improved.

The spiral baffle is preferably a heat-conducting metal plate, which has high heat-conducting efficiency, thereby accelerating the cooling speed of the exhaust pipe.

The induced draft fan is provided with an induced draft fan controller, which is used to control the wind speed of the induced draft fan, and then adjust the exhaust gas temperature at the outlet of the exhaust duct. The input end of the induced fan controller is electrically connected to the output end of the temperature sensor, and the output end of the induced fan controller is connected to the induced fan control. According to the detected temperature of the temperature sensor, the air volume of the induced draft fan is controlled by the induced draft fan controller.

The inlet end of the temperature regulation sleeve is located at the outlet end of the smoke exhaust pipe to prevent the smoke from the smoke exhaust pipe from entering the temperature regulation sleeve.

The outlet end of the induced draft fan is also connected to the combustion chamber pipeline of the hot blast stove, and the hot blast drawn by the induced draft fan is transported to the combustion chamber of the hot blast stove, which avoids the preheating of the cold air by the combustion chamber of the hot blast stove, effectively utilizes heat energy, and simultaneously , also added combustion air to improve the combustion effect.

Working principle: The high-temperature flue gas enters the main flue gas pipe and goes to the heat exchange device for heat exchange waste heat recovery, so that the high-temperature flue gas in the heat exchange chamber can exchange heat with the hot water in the heat exchange tube. The water transfer pump is used to control the flow rate of the exchanged water, and the waste heat recovery of the flue gas is controlled by adjusting the flow rate of the exchanged water, thereby realizing the adjustment and control of the flue gas temperature; Through the induced draft fan, the air flows spirally in the temperature-regulating sleeve outside the smoke exhaust pipe, and then air-cools the smoke exhaust pipe to achieve temperature regulation and control.

The utility model has the advantages of realizing the regulation and control of waste heat recovery and high utilization rate of waste heat.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Detailed ways

The preferred embodiments of the present utility model are described below, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the present utility model, and are not intended to limit the present utility model.

Example 1

As shown in Figure 1, a controllable and adjustable flue gas waste heat recovery smart pipe network system includes a flue gas main pipe 1, and the outlet end of the flue gas main pipe 1 is connected to the heat exchange chamber inlet of the heat exchange device 2 The heat exchange chamber of the heat exchange device 2 is provided with several heat exchange tubes 3, and the two ends of the heat exchange tubes 3 protrude from the heat exchange chamber of the heat exchange device 2, and the heat exchange tubes One end of 3 communicates with the cold water main pipe 4, and the other end communicates with the return water main pipe 5. The outlet of the heat exchange chamber of the heat exchange device 3 communicates with the smoke exhaust pipe 6, and the outlet end of the smoke exhaust pipe 6 is provided with A temperature sensor is used to detect the temperature of the exhaust gas. The cold water main pipe 4 is provided with a water delivery pump 7 to control the speed of the water, and adjust the heat exchange with the flue gas through the flow speed of the water, thereby realizing the adjustment of the flue gas temperature control.

The water transfer pump 7 is provided with a water transfer pump controller, the input end of the water transfer pump controller is electrically connected to the output end of the temperature sensor, and the output end of the water transfer pump controller is connected to the control of the water transfer pump. According to the detected temperature of the temperature sensor, the water delivery pump controller controls the water delivery volume of the water delivery pump.

The outlet end of the smoke exhaust pipe 6 is provided with a smoke exhaust valve, and the amount of smoke discharge is adjusted through the smoke exhaust valve.

The outside of the smoke exhaust pipe 6 is also provided with a temperature regulation sleeve 8, and a spiral partition is provided between the temperature regulation sleeve 8 and the smoke exhaust pipe, and the spiral partition is spirally wound around the smoke exhaust pipe. The outer wall of the pipe, the outlet end of the temperature-regulating sleeve is connected with the induced draft fan 9, and the air is spirally flowed outside the exhaust pipe through the induced draft fan 9, and then the exhaust pipe is air-cooled to achieve temperature adjustment and control . By adopting the spiral partition, the flow distance of the wind is increased, and the heat dissipation speed of the smoke exhaust pipe is improved.

The spiral baffle is preferably a heat-conducting metal plate, which has high heat-conducting efficiency, thereby accelerating the cooling speed of the exhaust pipe.

The induced draft fan 9 is provided with an induced draft fan controller, which is used to control the wind speed of the induced draft fan, and then adjust the exhaust gas temperature at the outlet of the exhaust duct. The input end of the induced fan controller is electrically connected to the output end of the temperature sensor, and the output end of the induced fan controller is connected to the induced fan control. According to the detected temperature of the temperature sensor, the air volume of the induced draft fan is controlled by the induced draft fan controller.

The inlet end of the temperature regulation sleeve 8 is located at the outlet end of the smoke exhaust pipe 6 to prevent the smoke from the smoke exhaust pipe from entering the temperature regulation sleeve.

The outlet end of the induced draft fan 9 is also connected to the combustion chamber pipeline of the hot blast stove, and the hot blast drawn by the induced draft fan is delivered to the combustion chamber of the hot blast stove, thereby avoiding the preheating of the cold air by the hot blast stove combustion chamber, effectively utilizing heat energy, At the same time, the combustion air is added to improve the combustion effect.

Working principle: The high-temperature flue gas enters the main flue gas pipe and goes to the heat exchange device for heat exchange waste heat recovery, so that the high-temperature flue gas in the heat exchange chamber can exchange heat with the hot water in the heat exchange tube. The water transfer pump is used to control the flow rate of the exchanged water, and the waste heat recovery of the flue gas is controlled by adjusting the flow rate of the exchanged water, thereby realizing the adjustment and control of the flue gas temperature; Through the induced draft fan, the air flows spirally in the temperature-regulating sleeve outside the smoke exhaust pipe, and then air-cools the smoke exhaust pipe to achieve temperature regulation and control.

Claims (8)

1. A controllable and adjustable smart pipe network system for recovery of waste heat from flue gas, characterized in that: it includes a main flue gas pipe, the outlet end of the main flue gas pipe is connected to the inlet of the heat exchange chamber of the heat exchange device, and the The heat exchange chamber of the heat exchange device is provided with a number of heat exchange tubes, the two ends of the heat exchange tubes protrude from the heat exchange chamber of the heat exchange device, and one end of the heat exchange tubes communicates with the cold water main pipe , the other end communicates with the return water main pipe, the outlet of the heat exchange chamber of the heat exchange device communicates with the smoke exhaust pipe, and the outlet end of the smoke exhaust pipe is provided with a temperature sensor for detecting the temperature of the exhaust smoke. The cold water main is equipped with a water transfer pump. 2. A controllable and adjustable smart pipe network system for recovery of flue gas waste heat according to claim 1, characterized in that: the water delivery pump is provided with a water delivery pump controller, and the input end of the water delivery pump controller is connected to the The output end of the temperature sensor is electrically connected, and the output end of the water transfer pump controller is connected with the control of the water transfer pump. 3. A controllable and adjustable smart pipe network system for recovering flue gas waste heat according to claim 1, characterized in that: a smoke exhaust valve is provided at the outlet end of the smoke exhaust pipe. 4. A controllable and adjustable smart pipe network system for recovering flue gas waste heat according to claim 1, characterized in that: the outside of the exhaust pipe is also provided with a temperature regulation sleeve, and the temperature regulation sleeve A spiral partition is arranged between the smoke exhaust pipe, and the spiral partition is spirally wound on the outer wall of the smoke exhaust pipe, and the outlet end of the temperature regulating sleeve is connected with the induced draft fan pipe. 5. A controllable and adjustable smart pipe network system for recovery of flue gas waste heat according to claim 4, characterized in that: the spiral partition is a heat-conducting metal plate. 6. A controllable and adjustable smart pipe network system for recovery of flue gas waste heat according to claim 4, characterized in that: the induced draft fan is provided with an induced draft fan controller, and the input end of the induced draft fan controller is connected to the The output end of the temperature sensor is electrically connected, and the output end of the induced draft fan controller is connected with the induced draft fan control. 7. The controllable and adjustable smart pipe network system for recovering waste heat from flue gas according to claim 4, wherein the inlet end of the temperature regulation sleeve is located at the outlet end of the exhaust pipe. 8. A controllable and adjustable smart pipe network system for recovering flue gas waste heat according to claim 4, characterized in that: the outlet end of the induced draft fan is also connected to the combustion chamber pipe of the hot blast stove.