CN110332076A - Self-service smoke-eliminating, power-generating and smoke-discharging device - Google Patents

Abstract

The invention discloses a self-service smoke elimination power generation and exhaust device. According to the flue gas flow, it has a horizontal air distribution main pipe, a vertical air distribution branch pipe, and a suction duct in sequence. The upper part of the suspended air duct is connected to the suction duct, which is connected to the power generation and transmission system of the vertical fan blades. The vertical heat exchange pipeline is a plurality of air distribution branch pipes arranged in parallel, and the diameter of each air distribution branch pipe is smaller than the horizontal The diameter of the flue. The invention realizes heat exchange automatically while the flue gas is discharged, white smoke does not appear in the discharged flue gas, and uses the waste heat of the flue gas as a power source to form hot air flow to generate electricity.

Description

Self-service smoke elimination power generation smoke exhaust device

technical field

The invention relates to a flue gas discharge device.

Background technique

Production enterprises such as chemical plants and power plants usually have chimneys that emit smoke or mist, which is an essential device for kilns that use coal, gas, oil or other fuels. With the progress of society and the enhancement of public awareness of environmental protection, black smoke or white smoke emitted from chimneys has become synonymous with pollution. Standard” and obtained permission from the environmental protection department, but the public still regards it as one of the main culprits of smog, and the company has been criticized for this.

On the other hand, the water vapor in the discharged white smoke is in a saturated state, and the random discharge also wastes precious water resources. According to calculations, the total amount of water vapor discharged from chimneys in China exceeds hundreds of millions of tons. Although the amount of water vapor is insignificant compared with the amount of water vapor discharged from nature, it is an accomplice to the formation of fog or local haze when the temperature is low and the air pressure is low. White".

At present, the method of eliminating white smoke from chimneys at home and abroad usually uses heating white smoke, raising its temperature, and reducing its relative humidity. The chimney will no longer condense into white smoke. But when the ambient temperature is extremely low, such as lower than -10°C, even if it is heated to 85°C, white smoke can still be seen. It needs to be heated to above 120°C to not see white smoke, which requires more heat energy consumption. Lack of economic value and environmental value.

The patent application number is 2011102927526, a power generation system using fan smoke exhaust, including smoke exhaust fan, fan outlet pipe, soft connection, clean gas discharge chimney foundation, clean gas discharge chimney, conical connecting pipe, wind generator cabin, wind power Generator, air induction pipe and air induction valve; the wind generator is equipped with a wind generator cabin, the wind generator cabin is connected to the upper end of the clean air discharge chimney through a conical connecting pipe, and the lower end of the clean air discharge chimney is located at the clean air discharge chimney. On the basis of the discharge chimney; the clean gas discharge chimney is connected with the smoke exhaust fan through the fan outlet pipe, and a soft connection is provided on the fan outlet pipe; Induction valve. The invention has too many structural components, a high failure rate, and requires an induced draft fan to consume extra energy.

Contents of the invention

Purpose of the invention:

Provided is a self-service smoke elimination power generation and exhaust device which utilizes the heat energy contained in the flue gas itself and can not only operate automatically but also use the heat energy to generate electricity.

Technical solutions:

The self-service smoke elimination power generation and exhaust device of the present invention, according to the flue gas flow, sequentially has a horizontal air distribution main pipe, a vertical air distribution branch pipe, a suction tube, and a vertical fan blade (that is, the rotation axis of the fan blade is vertically set) to generate electricity. power transmission system.

The periphery of the air distribution main pipe has a vertically set suspended air duct, and the bottom of the suspended air duct is open (preferably the height of the opening is 1/10-1/3 of the diameter of the air duct, so that the amount of cold air entering is equal to that of the flue gas. The amount is consistent, and the cold air enters to form a flat passage, which has a faster flow speed and less flow noise), for the cold air to enter; the upper part of the suspended air cylinder is connected with the suction cylinder; the interior of the suspended air cylinder contains Vertical heat exchange pipe; a vertical cylinder supported by a suspended air duct on a concrete, metal or non-metal support, made of metal or non-metal material.

The above principle is: the flue gas is not only a heat medium, but also a power source, which provides power for the chimney effect of the suction tube. The inhaled air is not only a refrigerant, but also becomes a new power source after being heated. In the suction tube, the hot air flow rising at a constant speed blows the wind blades to generate electricity. For this reason, the flue gas and air follow the flow, and there are horizontal air distribution main pipes, vertical air distribution branch pipes, suspended suction tubes and foundations, and vertical wind blade power generation systems;

The periphery of the air distribution main pipe is provided with a vertically suspended suction tube. When the bottom of the suction tube is open, the cold air enters; the flue gas in the air distribution branch pipe exchanges heat with the air outside the branch pipe, and the flue gas cools down and condenses. At the same time, the air is heated and the density is reduced. The air inside and outside the suction tube produces a chimney effect due to the density difference, and the heated air forms a constant-speed rising hot air flow under the action of the chimney effect. The hot air is mixed with the cooled and condensed flue gas (the temperature is still higher than the hot air) discharged from the top of the vertical air distribution branch pipe, and the humidity of the mixed gas drops. Wind blade power generation system The wind blades rotate to drive the generator to generate electricity. The horizontal air distribution main pipe and vertical air distribution branch pipe contained in the suspended air duct are not only heat exchange equipment, but also the heart of the suction duct - the engine.

The vertical heat exchange pipeline is a plurality of air distribution branch pipes arranged in parallel, and the diameter of each air distribution branch pipe is smaller than the diameter of the horizontal flue; there is an air-cooling space between the air distribution branch pipes, for cold air to enter, and the flue gas in the air distribution branch pipes. gas for heat exchange.

The heating flue gas of the gas distribution main pipe flows in from one end, and the upper side wall of the horizontal flue has multiple openings, and each opening is vertically connected to a gas distribution branch pipe, and the heating flue gas changes from horizontal flow to upward diversion. The other end of the gas distribution main pipe is connected with a condensed water collection pipeline. When the hot flue gas flows upward in the gas distribution branch pipe, it exchanges heat with the cold air between the branch pipes, and part of the water vapor in the hot flue gas is cooled to form condensation. water, which trickles down to the condensate collection line, thereby reducing the amount of moisture that the flue gases emit into the atmosphere.

After the cold air is heated, it flows upward under the action of the chimney effect of the suspended air duct. After the flue gas in the air distribution branch pipe flows out, it flows upward together with the cold air preheated by the heat exchange, forming a constant upward heat flow. airflow. The invention combines the suspended air duct and the open heat exchange suction duct, utilizes the low-grade waste heat to produce this effect), enters the suction duct from below, drives the blades of the fan to rotate, drives the power generation and transmission system, and converts wind energy into electric energy for transmission go out.

During operation, after the flue gas with a temperature above 40°C enters the horizontal flue, it is shunted into the vertical gas distribution branch pipe. During the upward flow of the exhaust smoke, it exchanges heat with the ambient air outside the branch pipe, and the exhaust gas temperature drops. Part of the contained water vapor condenses into water, releases latent heat, and the condensed water flows down along the pipe wall, and finally flows to the gas distribution main pipe, and condenses and flows to the condensed water collection pipeline, so that the amount of water vapor discharged from the flue gas is significantly reduced. At the same time, the ambient air enters from the opening at the bottom of the suspended air duct, is heated by the flue gas, the temperature rises, and the relative humidity decreases. The hot air forms an ascending hot air flow in the suspended air duct, so that the ambient air is continuously inhaled by the suction duct , the rising hot air flow is mixed with the fully cooled and condensed exhaust gas from the top of the heat exchange tube (air distribution branch pipe), the relative humidity of the mixed gas decreases, and there is no white gas visible to the naked eye.

The fan blades in the suction tube rotate, and the mixed gas continues upwards, flowing out from the opening above the suction tube, and the fan blades rotate to drive the power generation and transmission system to generate electric energy. Preferably, there is a second vertical power generation fan blade behind the first group of fan blades. The hot air flow continues upward after blowing through the first group of fan blades.

The equivalent diameter of the suspended air duct varies depending on the exhaust volume, and the diameter can be 1-50 meters. The height of the air duct can be as small as 1 meter or as large as hundreds of meters. The preferred height of the air duct is 20-50 meters.

At the beginning, the suction tube is powered by low-grade waste heat, and then it can automatically rotate and suck air under the action of the sky tower effect of the updraft. The gas distribution main pipe is made of metal or non-metal, with an equivalent diameter of 0.1-10 meters and a length of 5-50 meters, with many gas distribution branch pipe connections and vertical heat exchange pipe connections; Outlet, made of metal or non-metal materials, equivalent diameter 0.05-0.5 meters, length 1-50 meters, equipped with heat exchange tube interface, smooth tube, finned tube or spiral made of heat-conducting materials such as metal or graphite tube etc.

The power generation and transmission system uses the vertical airflow to blow the fan blades to rotate and drive the generator to generate electricity. It is composed of transformer, generator support, generator, vertical fan blades and other parts.

Beneficial effect:

The invention realizes heat exchange automatically while the flue gas is discharged, condenses excess water vapor in the flue gas and flows out first, the water vapor content in the discharged flue gas is low, and no white smoke phenomenon occurs. Moreover, the heat energy hidden in the flue gas can be converted into electric energy to realize the utilization of waste heat; and the conversion process basically does not require additional power, and the device structure is simple. Through the reasonable calculation and design of the pipeline discharge, the flue gas flow and power generation can be determined on demand, making the efficient use of resources.

Description of drawings

Fig. 1 is a schematic diagram of a vertical cross-sectional structure of the present invention.

In the figure, 1-air distribution main pipe; 2-condensate water pipeline; 3-air distribution branch pipe; 4-suspended air duct; 5-air duct support; 6-opening; 7-suction duct; 8-power generation and transmission system .

Detailed ways

As shown in Figure 1, the self-service smoke elimination power generation and exhaust device, according to the flue gas flow, has the main gas distribution pipe, the gas distribution branch pipe, the suction cylinder, and the power generation and transmission system in sequence.

The periphery of the air distribution main pipe is provided with a vertical suspension air cylinder, the bottom of the suspension air cylinder is open, and its height is 1/5 of the diameter; the upper part of the suspension air cylinder is connected with the suction cylinder; the interior of the suspension air cylinder contains Vertical heat exchange pipes; suspended air ducts are vertical cylinders supported on concrete and made of metal materials.

The vertical heat exchange pipeline is a plurality of air distribution branch pipes arranged in parallel, and the diameter of each air distribution branch pipe is smaller than the diameter of the horizontal flue; there is an air-cooling space between the air distribution branch pipes, for cold air to enter, and the flue gas in the air distribution branch pipes. gas for heat exchange.

The heating flue gas of the gas distribution main pipe flows in from one end, and the upper side wall of the horizontal flue has multiple openings, and each opening is vertically connected to a gas distribution branch pipe, and the heating flue gas changes from horizontal flow to upward diversion. The other end of the gas distribution main pipe is connected with a condensed water collection pipeline. When the hot flue gas flows upward in the gas distribution branch pipe, it exchanges heat with the cold air between the branch pipes, and part of the water vapor in the hot flue gas is cooled to form condensation. water, dripping down to the condensate collection line.

When the ambient air temperature is 20°C and the relative humidity is 50%, the open heat exchange suction duct heats the air in the suspended duct from the inlet 20°C to 30°C, the relative humidity drops to 27%, and the air density decreases from 1.204kg /m3 dropped to 1.158kg/m3. The difference in density between the air inside and outside the air duct results in a pressure difference at the bottom opening (ie the air inlet) of the air duct. If the height of the suspended air duct is 10 meters, the pressure difference Δp=(1.204-1.158)*9.81*10=4.51Pa, the external pressure of the air duct is high, the internal pressure of the air duct is low, and the ambient air is squeezed from the bottom of the suspended air duct. According to the calculation, the air inlet speed is about 3m/s. The higher the height of the suspended air duct, the wind speed will increase proportionally. The squeezed air flows vertically upwards, exchanges heat, mixes with the exhaust, blows the fan to rotate, and finally discharges from the top of the suspended air duct. When the temperature is low and the humidity is low, the naked eye can no longer see the smoke.

According to theoretical calculations, the discharge flow rate of a thermal power plant boiler after desulfurization is 300,000m3/h, the flue gas temperature is 50°C, and the humidity is 100%. It is fed into the open-type heat exchange suction duct with a heat exchange area of 15000m2. When the diameter of the suspended duct is 25m and the height is 30m, the temperature is 25°C and the ambient humidity is 50%. The bottom of the air distribution main pipe will discharge 1000kg/h of condensed water The top wind speed reaches 4m/s, and the fan blades are driven to rotate at a speed of 60RPM. The power of each vertical fan blade power generation system is 80KW. The temperature of the mixed gas discharged from the top of the tower is 32°C, the relative humidity is 65%, and the exhaust volume is 6,000,000m3/h.

Claims (5)

1. The exhaust apparatus 1. a kind of self-service smoke elimination generates electricity, it is characterised in that: successively total with horizontal gas distribution according to flue gas flow Pipe, vertical gas distributionbranch pipe, wind sucting tube, wind sucting tube are coupled vertical fan blade power generation-transmission system；

   The periphery of gas distribution general pipeline has the hanging air duct being vertically arranged, and the bottom of hanging air duct is opening, enters for cold air；It is outstanding The top of empty air duct is connected with wind sucting tube；The vertical heat exchange pipe of inner containment of hanging air duct；Hanging air duct is to be supported on Vertical tubular article on concrete, metal or non-metal frame；

   Vertical heat exchange pipe is more gas distributionbranch pipes disposed in parallel, and the diameter of every gas distributionbranch pipe is less than the straight of horizontal flue Diameter；There is air-cooled space between gas distributionbranch pipe, enter for cold air, carry out heat exchange with the flue gas in gas distributionbranch pipe；

   Gas distribution general pipeline is flowed into for hot fume from one end, and horizontal flue upper side wall has more apertures, and each tapping vertically connects One gas distributionbranch pipe changes into upward shunting by bottom horizontal flow sheet for hot fume；

   After other flue gases outflow in gas distributionbranch pipe, after the thermal current formed with the cold air preheated by heat exchange mixes, It flows up together, blows the blade rotation of vertical fan blade power generation-transmission system, driving power generation-transmission system power generation turns wind energy Electrical energy transportation is turned to go out；Gas is finally discharged at the top of wind sucting tube.
2. The fume extractor 2. self-service smoke elimination as described in claim 1 generates electricity, it is characterised in that:

   The other end of gas distribution general pipeline is linked with condensation water collection pipeline, collects the condensed water being cooled in hot fume.
3. The exhaust apparatus 3. self-service smoke elimination as described in claim 1 generates electricity, it is characterised in that: power generation-transmission system is by power transformation Device, generator support, generator, vertical fan blade composition.
4. The fume extractor 4. self-service smoke elimination as claimed in claim 1 or 3 generates electricity, it is characterised in that: after first group of fan blade also The vertical power generation fan blade of second, thermal current continue up after blowing over first group of fan blade, and blow over the rotation of second fan blade and generate more More electric energy.
5. The exhaust apparatus 5. self-service smoke elimination as described in claim 1 generates electricity, it is characterised in that: the height of the bottom opening of air duct For the 1/10-1/3 of air duct diameter.