CN209084801U - A flue gas moisture collection device - Google Patents

Abstract

The utility model discloses a kind of flue gas moisture collection device, including heat pipe, the heat of flue gas is spilt into environment for exchanging heat to flue gas by heat pipe.As shown in the above, the design of the device is relatively simple, i.e., absorbs the heat in flue gas by heat pipe, and then the vapor in flue gas is made to liquefy so as to subsequent recovery；Meanwhile the heat in flue gas being discharged into environment by heat pipe.The flue gas moisture removal process can control the increase of smoke evacuation resistance as far as possible, and device design is simple.Therefore, the utility model proposes flue gas moisture collection device, can control discharge fume resistance under the premise of, simplify flue gas moisture removal process, improve recovery efficiency, solve the problems, such as the field at this stage.

Description

A flue gas moisture collection device

technical field

The utility model relates to the technical field of flue gas treatment, in particular to a flue gas moisture collection device.

Background technique

At present, most power plants in the world directly discharge the flue gas after desulfurization and denitrification into the atmosphere, and then discharge a large amount of water vapor contained in the flue gas into the environment; and these water vapors contain a small amount of nitrogen oxides and sulfur oxides. , the random discharge not only causes a great waste of water resources, but also aggravates the haze.

As far as the prior art is concerned, the flue gas water vapor collection devices can be roughly divided into two categories: one is designed as a heat exchanger, that is, the flue gas is cooled by cooling water, etc., so that the water vapor is condensed and recovered. The technology is more complex and the operating cost is high; the other is the membrane separation technology that is still in the research stage, that is, the use of semi-permeable membranes to separate, enrich and purify the moisture in the flue gas. Although this technology can reduce costs and improve collection rates , but it will greatly increase the smoke exhaust resistance, resulting in the deterioration of the exhaust state and the increase in the loss of other equipment.

Therefore, how to simplify the flue gas moisture recovery process and improve the recovery efficiency under the premise of controlling the smoke exhaust resistance is an urgent problem to be solved in this field at this stage.

Utility model content

In view of this, the purpose of the present invention is to provide a flue gas moisture collection device, which can simplify the flue gas moisture recovery process under the premise of controlling the smoke exhaust resistance, and solve the current problems in this field.

A flue gas moisture collection device includes a heat pipe, which is used for exchanging heat for the flue gas and dissipating the heat of the flue gas into the environment.

Preferably, in the flue gas moisture collection device, the heat pipe includes:

an evaporation section, which is located in the chimney and is used to absorb the heat of the flue gas;

The condensation section, which is located outside the chimney, is used to dissipate the heat of the flue gas into the environment;

an adiabatic section, which passes through the wall of the chimney and is used to connect the evaporation section and the condensation section.

Preferably, the flue gas moisture collection device further includes a collector for collecting moisture in the flue gas, the collector is annular, and the outer edge of the collector is in contact with the inner wall of the chimney, And the collector is provided with a water collecting hole.

Preferably, the flue gas moisture collection device further comprises a down pipe connected with the water collecting hole, and the down pipe is used for collecting the liquid condensed from the moisture in the flue gas.

Preferably, in the flue gas moisture collecting device, the collector is disposed in the chimney in an inclined shape, and the water collecting hole is located at the lowest position of the collector.

Preferably, in the flue gas moisture collection device, ribs are provided on the inner wall of the evaporation section.

Preferably, in the flue gas moisture collection device, the fins are arranged on the inner wall of the evaporation section along the direction of the chimney.

Preferably, in the flue gas moisture collection device, there are multiple fins, and the multiple fins are arranged in a ring shape on the inner wall of the evaporation section.

Preferably, in the flue gas moisture collecting device, the fins are in the shape of an inverted triangle.

Preferably, in the flue gas moisture collecting device, the flue gas moisture collecting device is arranged in the middle or the upper part of the chimney.

The flue gas moisture collection device proposed by the utility model includes a heat pipe, which is used for exchanging heat for the flue gas and dissipating the heat of the flue gas into the environment. It can be seen from the above that the design of the device is relatively simple, that is, the heat in the flue gas is absorbed by the heat pipe, and the water vapor in the flue gas is liquefied for subsequent recovery; at the same time, the heat in the flue gas is discharged into the environment through the heat pipe. The flue gas moisture recovery process can control the increase of the smoke exhaust resistance as much as possible, and the device design is simple. Therefore, the flue gas moisture collection device proposed by the present utility model can simplify the flue gas moisture recovery process and improve the recovery efficiency under the premise of controlling the smoke exhaust resistance, and solve the difficult problems in this field at the present stage.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic diagram of a heat pipe in a specific embodiment of the present invention;

2 is a simplified diagram of a heat pipe in a specific embodiment of the present invention;

3 is a schematic diagram of a rib in a specific embodiment of the present utility model;

4 is a schematic diagram of a collector in a specific embodiment of the present invention.

In Figures 1-4:

Evaporation section - 1, condensation section - 2, adiabatic section - 3, collector - 4, descending pipe - 5, fins - 6, steam joint pipe - 7, riser tube bundle - 8, liquid joint pipe - 9, gas phase part - 10. Liquid phase part-11, upper connecting pipe-12, condensing pipe-13, lower connecting pipe-14.

Detailed ways

The core of this specific embodiment is to provide a flue gas moisture collection device, which can simplify the flue gas moisture recovery process on the premise of controlling the smoke exhaust resistance, and solve the current difficulties in this field.

Hereinafter, the embodiment will be described with reference to the drawings. In addition, the embodiments shown below do not have any limiting effect on the content of the utility model described in the claims. In addition, the whole content of the structure shown in the following embodiment is not limited to what is necessary for the solution of the invention described in the claim.

The flue gas moisture collection device provided by this specific embodiment is shown in FIGS. 1-3 ; it includes a heat pipe, and the heat pipe is used for exchanging the heat of the flue gas and dissipating the heat of the flue gas into the environment. It can be seen from the above that the design of the device is relatively simple, that is, the heat in the flue gas is absorbed by the heat pipe, and the water vapor in the flue gas is liquefied for subsequent recovery; at the same time, the heat in the flue gas is discharged into the environment through the heat pipe. The flue gas moisture recovery process does not increase the resistance of the flue gas, and the device design is simple; compared with the existing designs in the industry, the design can reduce the increased smoke resistance as much as possible. Therefore, the flue gas moisture collecting device proposed by the present utility model can simplify the flue gas moisture recovery process under the premise of controlling the smoke exhaust resistance, and solve the problems in this field at the present stage.

It should be noted that a heat pipe, also known as a heat pipe, is a special material with rapid temperature uniformity. It is a hollow metal pipe body, which is light in weight and has rapid temperature uniformity, making it excellent Thermal superconductivity. A typical heat pipe consists of a tube shell, a liquid wick and an end cap. The heat pipe is pumped to a negative pressure of 1.3×(10 ^-1 -10 ^-4 )Pa and then filled with an appropriate amount of working liquid to make the suction close to the inner wall of the tube. The wick capillary porous material is filled with liquid and then sealed. One end of the heat pipe is the evaporation section 1, and the other end is the condensation section 2, and an adiabatic section 3 can be set between the two sections according to application requirements. When the high-temperature flue gas flows through, the evaporation section 1 at one end of the heat pipe absorbs heat to make the liquid in the liquid wick evaporate and vaporize. The liquid flows back to the evaporation section 1 along the porous material by capillary action and gravity. In this way, the heat is transferred from one end of the heat pipe to the other end, that is, the heat of the high-temperature flue gas is carried from the inside of the chimney to the outside of the chimney, and the heat is dissipated to the environment.

In the flue gas moisture collection device provided by this specific embodiment, the heat pipe may include: an evaporation section 1, a condensation section 2, and an adiabatic section 3; wherein, the evaporation section 1 is located in the chimney, and can be arranged close to the inner wall of the chimney for absorbing The heat of the flue gas; the condensation section 2 is located outside the chimney and is used to dissipate the heat of the flue gas into the environment; the adiabatic section 3 is used to connect the evaporation section 1 and the condensation section 2, and the insulation section needs to pass through the wall of the chimney, and can be used horizontally. layout form. In addition, the part of the insulation section passing through the wall can be arranged in a horizontal or inclined arrangement, or other arrangements that can achieve the same effect, but in a general electric field, horizontal arrangement is more convenient for construction and closer to the actual site.

This arrangement has the following advantages: first, the heat exchange structure of the heat pipe type is simple, the safety of the system can be guaranteed, and even if it is arranged in a high position, it is not easy to cause serious safety problems; secondly, the evaporation section 1 of the heat pipe sucks from the flue gas The heat is released to the atmosphere through the condensation section 2, and it is arranged in a high position to eliminate the influence of heat dissipation on ground personnel and equipment; finally, the heat dissipation surface of the heat pipe is in a state of convection with the air, and the chimney is the equipment with the highest distance from the ground in the power plant. , the higher the air is from the ground, the lower the temperature and the greater the wind speed, the greater the convective heat transfer coefficient on the surface of the heat pipe, and the heat dissipation of the condensing section 2 is better, which increases the cooling output of the heat pipe and reduces the cooling effect on the flue gas. The better, therefore, it is beneficial to arrange the heat pipe in a higher position of the chimney, such as the middle or upper part of the chimney.

The flue gas moisture collection device provided in this specific embodiment may further include a collector 4 for collecting moisture in the flue gas, for collecting high-temperature water vapor condensed in the evaporation section 1 . The collector 4 is annular, or called a water tank, the outer edge of the collector 4 is in contact with the inner wall of the chimney, and the collector 4 is provided with a water collecting hole. Inside the chimney, when the flue gas passes through the evaporation section 1 of the heat pipe, it will exchange heat with the high-temperature flue gas, absorb the heat in the flue gas, liquefy and condense the water vapor in the flue gas, and adhere to the wall. First, a nucleus is formed that is composed of several water molecules. With the continuous condensation of steam and the adhesion of water vapor on the surface of the nucleus, the nucleated water vapor molecular clusters continue to grow, and the water droplets formed after growth have a certain weight. Under the action of gravity It flows into the collector 4 along the wall surface, and in this process, the large water droplets can take away a part of the small water droplets attached to the wall surface. This setting can collect and gather water droplets condensed from high temperature water vapor in time.

The flue gas moisture collection device provided by this specific embodiment may also include a downcomer 5 communicated with the water collecting hole, and the downcomer 5 is used to transport the collected liquid from the height of the chimney to the bottom for treatment, so as to facilitate the exhaustion of the collected liquid. It is possible to collect more moisture in the flue gas for subsequent treatment. The collector 4 can be disposed in the chimney in an inclined shape, and the water collecting hole is located at the lowest position of the collector 4 so as to collect the condensate. It should be noted that what needs to be collected above is the liquid condensed and gathered by the moisture in the flue gas, that is, the condensate; this condensate is a mixture, that is, some remaining ash particles in the flue gas after purification, as well as sulfur dioxide and nitrogen oxides will adhere. Or dissolve in water to form condensate containing impurities.

In the flue gas moisture collection device provided by this specific embodiment, fins 6 may be provided on the inner wall of the evaporation section 1 . The heat exchange area of the evaporating tube bundle arranged close to the wall is limited. Even if the multi-layer structure is used, a part of the water vapor will still pass directly from the mainstream area (ie the center of the cross section of the chimney) with the flue gas, and it is too late to exchange with the heat pipe. The heat flows out of the chimney. Because the water vapor concentration at the center of the chimney is high, increasing the heat exchange surface in the center can not only greatly increase the effective area of steam heat exchange, but also increase the heat absorption of the working fluid in the heat pipe (that is, increase the heat dissipation of the flue gas). , Reduce the flue gas temperature and increase the condensation rate of water vapor. Therefore, on the basis of the original design, fins 6 can be provided to enhance the condensation effect of water vapor in the flue gas. Further, the fins 6 can be arranged on each evaporating tube. The evaporating tube is the pipeline through which the working medium flows in the evaporating section 1. The radial arrangement is in the form of an inverted triangle, and textures can also be added on the surface to allow the water droplets to follow the changing direction. The hot surface flows down and eventually converges in the sink. In addition, the design of the rib is not necessary, and its shape can also be other designs that can achieve the same effect. The fins in this specific embodiment are only in an inverted triangle shape as an example, and the fins in this shape are beneficial to heat exchange and moisture collection. The arrangement form of the fins 6 should be arranged according to the actual situation, and can be in other forms. The fins 6 are arranged on the wall surface of the evaporation section 1 along the direction of the chimney, as shown in FIG. 3 .

In the flue gas moisture collecting device provided by this specific embodiment, there are multiple fins 6 , and the multiple fins 6 are arranged on the inner wall of the evaporation section 1 in a ring shape. For example, the fins 6 can be thin sheets and have an inverted triangular shape, which can effectively reduce the flow resistance of the flue gas while exchanging heat and increasing the vapor condensation area, as shown in FIG. 2 .

Further, the evaporation section 1, the adiabatic section 3 and the condensation section 2 of the heat pipe are introduced in detail: evaporation section 1

Figure 2 shows the arrangement structure of the evaporation section 1 of the heat pipe, which includes three parts: the steam header 7 at the upper end, the rising tube bundle 8 arranged in the circumferential direction, and the liquid header 9 at the lower end. Under the action of gravity, the working medium on the heat exchange surface of the evaporation section 1 is kept in the liquid phase, thus forming a continuous and good heat exchange effect. On the flue gas side, inside the evaporation section 1, the working fluid in the ascending tube bundle 8 arranged circumferentially close to the wall will cause the water vapor near the wall to condense first, and then under the action of the partial pressure gradient (ie the concentration difference), the flue gas will The water vapor will form a tendency to diffuse from the center to the wall. Although the water vapor in the center of the main flow area of flue gas diffuses circumferentially, the water vapor concentration in the center is still the highest. Water vapor condenses.

Insulation section 3

As shown in Figure 2, the adiabatic section 3 of the heat pipe is a heat pipe section that does not participate in heat exchange. Its function is to complete the communication between the evaporation section 1 and the condensation section 2 and the transportation of the working fluid inside the heat pipe. The tube bundle of the adiabatic section 3 can be divided into two Parts: gas phase part 10 and liquid phase part 11. The gas phase part 10 connects the steam pipe 7 of the evaporation section 1 and the upper pipe 12 of the condensation section 2, so that the working medium steam enters the condensation section 2 from the evaporation section 1 for heat dissipation; the liquid phase part 11 is connected to the liquid pipe 9 of the evaporation section 1 and The downstream pipe 14 of the condensation section 2 makes the working fluid enter the evaporation section 1 from the condensation section 2 to absorb heat.

Considering the feasibility of the actual installation process, the pipes in the insulation section 3 need to pass through the chimney and the wall of the chimney. The pipes in these places can be arranged horizontally, and the height difference can be in the form of vertical pipes, which are arranged between the chimney pipe wall and the chimney concrete. The gap between the supporting parts should be minimized by opening holes on the chimney pipe wall and chimney to ensure safety and reduce construction difficulty.

Condensing section 2

As shown in FIG. 2 , the condensing section 2 of the heat pipe includes an upper connecting pipe 12 , a condensing pipe 13 and a lower connecting pipe 14 . The working fluid steam is distributed by the upper connecting pipe 12, and is pushed down by the pressure difference to enter the bundle of condenser pipes 13 for cooling and condensation, and then flows into the adiabatic section 3 of the heat pipe through the lower connecting pipe 14. Because the heat pipes are arranged at a relatively high position, the heat exchange surface of the condensation section 2 and the air belong to high-intensity convective heat exchange, and the heat exchange effect is ideal. In order to reduce the influence of the boundary layer on it, enhance the heat dissipation effect, and quickly condense the steam working medium in the tube into a liquid state.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. a kind of flue gas moisture collection device, which is characterized in that including heat pipe, the heat pipe is used to exchange heat to flue gas, and The heat of flue gas is spilt into environment；

The heat pipe includes:

Evaporator section (1), the evaporator section (1) is located in chimney, for absorbing the heat of flue gas；

Condensation segment (2), the condensation segment (2) is located at outside chimney, for the heat of flue gas to be spilt into environment；

Adiabatic section (3), the adiabatic section (3) passes through the wall surface of the chimney, for connecting the evaporator section (1) and the condensation Section (2).

2. flue gas moisture collection device according to claim 1, which is characterized in that further include for collecting moisture in flue gas Collector (4), the collector (4) is ring-type, and the inner wall of the outer edge and the chimney of the collector (4) fits, And the collector (4) is equipped with gully-hole.

3. flue gas moisture collection device according to claim 2, which is characterized in that further include being connected with the gully-hole Down-comer (5), the down-comer (5) be used to collect hydrogenesis in flue gas at liquid.

4. flue gas moisture collection device according to claim 2, which is characterized in that the collector (4) obliquely sets It is placed in the chimney, the gully-hole is located at the minimum position of the collector (4) topography.

5. flue gas moisture collection device according to claim 1, which is characterized in that set on the inner wall of the evaporator section (1) There are fin (6).

6. flue gas moisture collection device according to claim 5, which is characterized in that the fin (6) is along the direction of chimney It is set to the inner wall of the evaporator section (1).

7. flue gas moisture collection device according to claim 6, which is characterized in that the fin (6) is multiple and multiple The fin (6) is annularly arranged in the inner wall of the evaporator section (1).

8. flue gas moisture collection device according to claim 6, which is characterized in that the fin (6) is in inverted triangle shape.

9. flue gas moisture collection device according to claim 1, which is characterized in that the flue gas moisture collection device setting At the middle part or top of the chimney.