CN210832063U

CN210832063U - Biomass direct-combustion flue gas waste heat utilization device

Info

Publication number: CN210832063U
Application number: CN201920923921.3U
Authority: CN
Inventors: 胡维红; 熊建; 杨新建
Original assignee: Wuhan Lanying New Energy Co ltd
Current assignee: Wuhan Lanying New Energy Co ltd
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2020-06-23
Anticipated expiration: 2029-06-19

Abstract

The utility model relates to a flue gas waste heat utilization equipment that living beings were directly fired, it includes from last to the flue that sets gradually down, waste heat absorption section of thick bamboo and ash bucket, waste heat absorption section of thick bamboo's upper end is equipped with the tube sheet, the lower extreme is equipped with down the tube sheet, parallel spaced is fixed with many heat transfer tobacco pipes between the upper and lower tube sheet, the upper end and the flue intercommunication of heat transfer tobacco pipe, lower extreme and ash bucket intercommunication, be equipped with on waste heat absorption section of thick bamboo's the lateral wall with a section of thick bamboo in the water inlet and the delivery port of intercommunication, be equipped with in the flue and separate it for the baffle of advancing cigarette section and play cigarette section, partly and advance cigarette section intercommunication in the many heat transfer tobacco pipes. The utility model has the advantages of, can carry out the waste heat reabsorption to the direct outer 150 of arranging originally of biomass direct combustion device and give first place to the flue gas of 170 ℃, make its temperature reduce to arrange outside again after 80 ℃ below, the water vapor condensation in the flue gas realizes the recycle of flue gas sensible heat and water vapor condensation latent heat, reaches the outer purpose of arranging of flue gas waste heat make full use of and environmental protection.

Description

Biomass direct-combustion flue gas waste heat utilization device

Technical Field

The utility model belongs to the technical field of the biomass energy, concretely relates to flue gas waste heat utilization equipment of living beings direct combustion.

Background

Biomass is an organic substance produced by plants absorbing carbon dioxide from the air through photosynthesis. It is widely distributed, available in large quantities, and is the only renewable, storable natural feedstock containing hydrocarbon components and thermal energy.

The biomass is used as an efficient clean energy source and is more and more widely applied in the heat supply industry, the environment problems of huge increase of biomass demand and overhigh exhaust gas temperature are caused, and the heat supply energy consumption in China is increased along with the acceleration of the urbanization process in China. Therefore, the biomass utilization efficiency is improved, the boiler exhaust gas temperature is reduced, and the waste heat of the exhaust gas is fully utilized.

At present, the combustion efficiency of a biomass boiler is about 85%, about 10% of heat enters the environment through exhaust smoke, and if the latent heat of vaporization of water vapor in the exhaust smoke is considered, the exhaust smoke loss of the biomass boiler accounts for about 20% of the calorific value of biomass, so that the biomass boiler is huge energy waste. Meanwhile, a large amount of water vapor and a small amount of dust contained in the flue gas are also one of important factors for forming haze.

The traditional flue gas waste heat recovery technology mainly takes an economizer as a main part, takes return water of a heat supply network as a cold source and recovers flue gas waste heat. By the method, the temperature of the flue gas can be only reduced to about 150-170 ℃, the biomass utilization benefit can only reach about 75-80%, most of hot flue gas is exhausted to the atmosphere through a chimney, the waste heat of the flue gas is wasted, and the environment is polluted.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the too high, big scheduling problem of loss of discharging fume of exhaust gas temperature that biomass direct-fired heating system exists among the prior art, provide a flue gas waste heat utilization equipment of biomass direct-fired in order to reduce the exhaust gas temperature, improve the utilization efficiency of biomass energy.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a flue, waste heat absorption section of thick bamboo and ash bucket that living beings direct combustion, it includes from last to setting gradually down, the upper end of waste heat absorption section of thick bamboo is equipped with tube sheet, lower extreme and is equipped with down the tube sheet, parallel spaced is fixed with many heat transfer tobacco pipes between tube sheet and the lower tube sheet, the upper end of heat transfer tobacco pipe with flue intercommunication, lower extreme and ash bucket intercommunication, be equipped with on the lateral wall of waste heat absorption section of thick bamboo with the water inlet and the delivery port of a section of thick bamboo intercommunication, be equipped with in the flue and separate it for the baffle of advancing cigarette section and play cigarette section, many in the flue part in the heat transfer tobacco pipe with advance cigarette section intercommunication, the remainder with play cigarette section intercommunication.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, the baffle is fixed in the middle part of the flue and is perpendicular to the axial direction of the flue.

The adoption of the further scheme has the beneficial effects that the partition plate is arranged perpendicular to the axial direction of the flue, namely perpendicular to the flow direction of the flue gas, so that the aim of better blocking the flue gas and changing the flow direction of the flue gas is fulfilled; the partition board is vertical to the axial direction of the flue, and the axial direction of the flue is generally horizontal, so that the dust deposition of the partition board can be reduced.

Further, the waste heat absorption cylinder is a cylinder, the upper tube plate and the lower tube plate are circular plates, the plane where the partition plate is located is divided equally into the upper tube plate, one half of the heat transfer smoke tubes are communicated with the smoke inlet section, and the other half of the heat transfer smoke tubes are communicated with the smoke outlet section.

The beneficial effect of adopting the above further scheme is that half of all heat transfer smoke pipes are communicated with the smoke inlet section, the other half of the heat transfer smoke pipes are communicated with the smoke outlet section, the flow velocity of the smoke in all the heat transfer smoke pipes basically has no big difference, and the resistance of smoke flowing is favorably reduced.

Furthermore, a smoke passing opening is formed in the partition plate, and a baffle capable of adjusting the size of the opening of the smoke passing opening is arranged at the smoke passing opening.

The adoption of the further scheme has the beneficial effects that the resistance of the waste heat utilization device to the flow of the flue gas is adjusted by adjusting the degree of the baffle plate for shielding the flue gas passing port according to the flow condition and the pressure of the flue gas in the flue, so that the flue gas can be discharged smoothly; on the other hand, when the heat transfer smoke pipe is blocked accidentally, the smoke outlet can be enlarged in an emergency to ensure the smooth discharge of smoke, so that the risk of emergency shutdown is avoided.

Further, it is equipped with the spout to cross the mouth of cigarette both sides, the baffle both sides correspond the card and go into spout and sliding connection, the upside of baffle is connected with flexible actuating mechanism's flexible end.

The beneficial effect of adopting the above-mentioned further scheme is that, simple structure, regulation and control are convenient.

Furthermore, the lower extreme of ash bucket is equipped with the ash discharge mouth just ash discharge mouth department is equipped with the ash discharging device.

The beneficial effect of adopting the further scheme is that the accumulated dust in the flue gas can be discharged smoothly.

Furthermore, a plurality of water inlets and water outlets are formed in the side wall of the waste heat absorption cylinder.

The beneficial effect of adopting above-mentioned further scheme is that, multiple spot is intake and multiple spot is gone out water, can make the cooling water produce the turbulent flow at the waste heat absorption barrel, and the cross flow's cooling water can strengthen heat transfer efficiency.

Further, the heat transfer smoke pipe is a steel pipe or a ceramic pipe.

Further, the heat transfer smoke pipe is a steel pipe, and heat transfer fins are densely distributed outside the steel pipe.

The beneficial effect of adopting the further scheme is that the heat transfer effect is enhanced.

Compared with the prior art, the beneficial effects of the utility model are that:

the waste heat of the flue gas at the temperature of 150-170 ℃ which is originally directly discharged out of the biomass direct combustion device can be absorbed again, so that the temperature of the flue gas is reduced to be below 80 ℃ and then the flue gas is discharged out, the purposes of flue gas waste heat utilization and environmental protection discharge are achieved, and the utilization rate of biomass energy can be improved; compared with the conventional waste heat absorption device with a shell side water-passing tube side of flue gas, the utility model has the advantages that the flue gas-passing tube side and the waste heat absorption tube pass in a zigzag manner aiming at the characteristic of low ash content of the flue gas with the temperature of 170 ℃ which is originally discharged outside, so that the heat exchange efficiency of the flue gas and the cooling water can be effectively enhanced; the integrated and modular design has the characteristics of small occupied area, simple system, small field construction amount, high heat exchange efficiency, light weight, low cost and the like, the smoke flowing resistance is small and adjustable, the residual pressure of the original equipment is utilized for operation, and auxiliary power is not needed.

Drawings

Fig. 1 is a schematic structural diagram of a biomass direct-fired flue gas waste heat utilization device provided by the present invention (wherein arrows indicate a flow path of flue gas in the device);

FIG. 2 is an enlarged schematic view of a waste heat absorption cylinder of the flue gas waste heat utilization device shown in FIG. 1;

FIG. 3 is a sectional view of the residual heat absorbing drum shown in FIG. 2 taken along B-B.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a flue; 2. a waste heat absorption cylinder; 3. an ash hopper; 4. an upper tube sheet; 5. a lower tube plate; 6. a heat transfer smoke pipe; 7. a separator.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, if terms indicating orientation such as "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc. are used, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 3, the utility model provides a flue gas waste heat utilization equipment that living beings are directly fired, it includes from last flue 1, waste heat absorption section of thick bamboo 2 and the ash bucket 3 that sets gradually extremely down, waste heat absorption section of thick bamboo 2's upper end is equipped with tube sheet 4, the lower extreme is equipped with tube sheet 5 down, parallel spaced is fixed with many heat transfer tobacco pipes 6 between upper tube sheet 4 and the lower tube sheet 5, heat transfer tobacco pipe 6's upper end with flue 1 intercommunication, lower extreme with ash bucket 3 intercommunication, be equipped with on waste heat absorption section of thick bamboo 2's the lateral wall with a section of thick bamboo intercommunication's water inlet and delivery port, be equipped with in the flue 1 and separate its baffle 7 for advancing the cigarette section and going out the cigarette section, many in the heat transfer tobacco pipe 6 partly with advance the cigarette section intercommunication, the remainder with go out the cigarette section intercommunication.

It should be noted that, when the waste heat utilization device works, the flue gas longitudinally flows through the heat transfer smoke pipe from top to bottom, then from bottom to top, the cooling water transversely washes outside the pipe, and the heat of the flue gas is continuously transferred to the cooling water through the pipe wall of the heat transfer smoke pipe.

Further, the baffle plate 7 is fixed in the middle of the flue 1 and is perpendicular to the axial direction of the flue 1.

Further, the waste heat absorption barrel 2 is a cylinder, the upper tube plate 4 and the lower tube plate 5 are both circular plates, the plane where the partition plate 7 is located bisects the upper tube plate 4, one half of the heat transfer smoke pipes 6 is communicated with the smoke inlet section, and the other half of the heat transfer smoke pipes is communicated with the smoke outlet section.

In a preferred embodiment of the present invention, the partition 7 is provided with a smoke passing opening, and the smoke passing opening is provided with a baffle plate capable of adjusting the size of the smoke passing opening. The cigarette passing opening is characterized in that sliding grooves are formed in two sides of the cigarette passing opening, two sides of the baffle are correspondingly clamped into the sliding grooves and are in sliding connection, and the upper side of the baffle is connected with the telescopic end of the telescopic driving mechanism.

It should be noted that the baffle can completely shield the smoke passing opening, and can also completely open the smoke passing opening, the adjustment is performed by a telescopic driving mechanism, the telescopic driving mechanism can be specifically a hydraulic cylinder, the telescopic driving mechanism is positioned on the outer side of the top of the flue and is connected with the upper side of the baffle through a connecting rod, and the connecting rod penetrates through the top wall of the flue and is provided with a sealing bearing assembly at the penetrating position.

Further, the lower end of the ash hopper 3 is provided with an ash discharge port, and an ash discharge device is arranged at the ash discharge port.

Furthermore, a plurality of water inlets and water outlets are formed in the side wall of the waste heat absorption cylinder 2.

Further, the heat transfer smoke pipe 6 is a steel pipe or a ceramic pipe.

Further, the heat transfer smoke pipe 6 is a steel pipe, and heat transfer fins are densely distributed outside the steel pipe.

It should be noted that the utility model can cool the flue gas by using the water with lower temperature, reduce the temperature of the flue gas to the degree of condensing the water vapor in the flue gas, and further recover the waste heat of the flue gas; meanwhile, the sensible heat of the flue gas and the latent heat of condensation of the water vapor are recycled, the thermal efficiency of the boiler is improved, the utilization benefit of the biomass is improved, the water vapor and dust in the discharged flue gas of the boiler are reduced, and the effects of energy conservation and environmental protection are achieved.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A flue gas waste heat utilization device for biomass direct combustion is characterized by comprising a flue (1), a waste heat absorption cylinder (2) and an ash bucket (3) which are arranged from top to bottom in sequence, the upper end of the waste heat absorption cylinder (2) is provided with an upper tube plate (4), the lower end is provided with a lower tube plate (5), a plurality of heat transfer smoke pipes (6) are fixed between the upper tube plate (4) and the lower tube plate (5) at intervals in parallel, the upper end of the heat transfer smoke pipe (6) is communicated with the flue (1), the lower end is communicated with the ash hopper (3), a water inlet and a water outlet which are communicated with the inside of the waste heat absorption cylinder (2) are arranged on the side wall of the waste heat absorption cylinder, a partition plate (7) for dividing the flue (1) into a smoke inlet section and a smoke outlet section is arranged in the flue, one part of the heat transfer smoke pipes (6) is communicated with the smoke inlet section, and the rest is communicated with the smoke outlet section.

2. The biomass direct-fired flue gas waste heat utilization device according to claim 1, wherein the partition plate (7) is fixed in the middle of the flue (1) and is perpendicular to the axial direction of the flue (1).

3. The biomass direct-fired flue gas waste heat utilization device according to claim 1, wherein the waste heat absorption cylinder (2) is a cylinder, the upper tube plate (4) and the lower tube plate (5) are both circular plates, a plane where the partition plate (7) is located bisects the upper tube plate (4), one half of the heat transfer smoke tubes (6) is communicated with the smoke inlet section, and the other half of the heat transfer smoke tubes is communicated with the smoke outlet section.

4. The device for utilizing the residual heat of the flue gas generated by directly combusting biomass according to claim 1, wherein a flue gas passing opening is formed in the partition plate (7), and a baffle plate capable of adjusting the size of the flue gas passing opening is arranged at the flue gas passing opening.

5. The device for utilizing the residual heat of the flue gas generated by directly combusting biomass according to claim 4, wherein sliding grooves are formed in two sides of the flue gas passing port, two sides of the baffle plate are correspondingly clamped into the sliding grooves and are in sliding connection with the sliding grooves, and the upper side of the baffle plate is connected with the telescopic end of the telescopic driving mechanism.

6. The device for utilizing the residual heat of the flue gas generated by directly combusting biomass according to claim 1, wherein an ash discharge port is formed at the lower end of the ash bucket (3) and an ash discharge device is arranged at the ash discharge port.

7. The device for utilizing the flue gas waste heat of the direct combustion of the biomass according to claim 1, wherein a plurality of water inlets and water outlets are formed in the side wall of the waste heat absorption cylinder (2).

8. The device for utilizing the residual heat of the flue gas generated by the direct combustion of the biomass according to any one of claims 1 to 7, wherein the heat transfer smoke pipe (6) is a steel pipe or a ceramic pipe.

9. The device for utilizing the residual heat of the flue gas generated by directly combusting biomass according to claim 8, wherein the heat transfer smoke pipe (6) is a steel pipe, and heat transfer fins are densely distributed outside the steel pipe.