Boiler tail flue gas waste heat recovery device

Abstract

The utility model relates to the technical field of flue gas waste heat recovery, in particular to a boiler tail flue gas waste heat recovery device which comprises a flue gas inlet pipeline, a water storage heating box, a heating pipeline, a flue gas outlet pipeline and a flue gas treatment mechanism. One end of the smoke inlet pipeline penetrates through the water storage heating tank and is communicated with the upper end of the heating pipeline; one end of the smoke outlet pipeline penetrates through the water storage heating box and communicates with the lower end of the heating pipeline, the smoke treatment mechanism comprises a smoke treatment box, two mounting plates, a dust removal part, a desulfurization part and a denitration part, and the other end of the smoke outlet pipeline communicates with one side of the lower portion of the smoke treatment box; smoke dust on the filter plate can be effectively treated in time through all the components, the filter plate cannot be blocked, and the overall flue gas desulfurization and filtration effect is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to a flue gas waste heat recovery technology field, concretely is a boiler tail flue gas waste heat recovery device. BACKGROUND

[0002] In industrial production and many civil scenes, the application of the boiler is extremely wide, and it undertakes the key task of generating heat energy to meet various needs. However, in the running process of the boiler, a large amount of high-temperature flue gas will be discharged from the tail. These flue gases usually carry a large amount of waste heat, if not treated directly discharged to the atmosphere, not only will cause great waste of energy, but also will have negative impact on the environment.

[0003] The utility model discloses a boiler tail flue gas waste heat recovery device of CN217031238U, including boiler main part, flue gas pipe, water storage tank, exhaust pipe and desulfurization mechanism, the heating groove is set up between the furnace wall of boiler main part, and the top of boiler main part is fixedly connected with flue gas pipe, the other end of flue gas pipe is fixedly connected with water storage tank, and the middle installation of the tank wall of water storage tank has spiral heating pipe, and the bottom of water storage tank is fixedly connected with exhaust pipe, and the end away from water storage tank of exhaust pipe is fixedly connected with the bottom of boiler main part, and the bottom of the other side of boiler main part is fixedly connected with desulfurization mechanism. The utility model discloses a boiler tail flue gas waste heat recovery device, the water in water storage tank is heated by flue gas spiral heating pipe, and then the flue gas enters the heating groove again, which can realize the reuse of flue gas, and reduce the energy consumption to a certain extent. The hot gas enters the inside of desulfurization tank through the air inlet, and the filter screen in the inside of desulfurization tank is set, which filters and treats the flue gas, avoids the pollution of harmful substances in the generated flue gas to the environment.

[0004] However, the above-mentioned patent still has the following deficiencies in the actual use process: in the process of filtering and treating the flue gas, the filter screen is easy to accumulate the dust, and the dust on the filter screen cannot be treated in time, which can cause the blockage of the filter screen and affect the effect of the overall flue gas desulfurization filtration. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a boiler tail flue gas waste heat recovery device to solve the problems in the above background technology.

[0006] The technical scheme of the utility model is:

[0007] The utility model provides a boiler tail flue gas waste heat recovery device, including smoke inlet pipeline, water storage heating tank, heating pipeline, smoke outlet pipeline and flue gas treatment mechanism, heating pipeline is installed in the inside of water storage heating tank in spiral shape, one end of smoke inlet pipeline passes through water storage heating tank and is communicated with the upper end of heating pipeline, one end of smoke outlet pipeline passes through water storage heating tank and is communicated with the lower end of heating pipeline, flue gas treatment mechanism includes flue gas treatment tank, two installation plates, dust removal part, desulfurization part and denitration part, the other end of smoke outlet pipeline is communicated with the side below flue gas treatment tank, two installation plates are symmetrically installed on the two side walls in the inside of flue gas treatment tank, dust removal part, desulfurization part and denitration part are installed on two installation plates in proper order from bottom to top, and the top of flue gas treatment tank is provided with exhaust pipe.

[0008] Preferably, the dust removal part includes a dust receiving box, a filter plate, and a dust cleaning element. The dust receiving box is located at the bottom of the flue gas treatment tank and slides on the two installation plates. The filter plate and the dust cleaning element are installed below the filter plate. The dust cleaning element includes a dust cleaning brush, two groups of sliding blocks, two groups of pulling sliding rods, and a pulling rod. One side of each group of sliding blocks is slidingly installed on the installation plate below the filter plate. One end of each group of pulling sliding rods is connected to one group of sliding blocks. The other end of each group of pulling sliding rods extends out of the flue gas treatment tank through the flue gas treatment tank. The pulling rod is connected to the other end of each group of pulling sliding rods outside the flue gas treatment tank. An installation slot is formed above each group of sliding blocks. An elastic return element is installed in each installation slot. The dust cleaning brush is placed on the two groups of elastic return elements through the installation slots.

[0009] Preferably, each group of elastic return elements includes an elastic return plate and two groups of return springs. One end of each group of return springs is connected to the bottom of the installation slot. The elastic return plate is slidingly installed in the installation slot. The other end of each group of return springs is connected to the bottom of the elastic return plate.

[0010] Preferably, the desulfurization part is composed of two groups of limestone slurry containers and two groups of clamping blocks. Each group of clamping blocks is T-shaped. One side of each group of clamping blocks is connected to one group of limestone slurry containers. Each group of limestone slurry containers is inserted into the installation plate through the clamping block on one side.

[0011] Preferably, the denitration part is composed of an activated carbon adsorption plate and two placement strips. The two placement strips are symmetrically arranged above the two installation plates. The activated carbon adsorption plate is placed on the two placement strips.

[0012] Preferably, a switch cleaning door is hingedly arranged on one side of the flue gas treatment tank. A flue gas treatment observation window is installed on the switch cleaning door.

[0013] Preferably, an air quality monitor is installed on the exhaust pipe.

[0014] Preferably, the top of the water storage heating tank is provided with a water inlet, and the side below the water inlet is provided with a water outlet.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] Firstly, when the flue gas enters the flue gas treatment box from the flue gas outlet pipeline, the flue gas gradually diffuses from bottom to top, at this time, the filter plate can first filter and separate the dust in the flue gas, when the dust on the filter plate accumulates more and affects the filtration of the filter plate and the passing of the flue gas, the personnel operate to pull the pull rod outside at this time, the pull rod drives the two sides to slide the pull rod outwardly, the pull rod drives the two groups of sliding blocks to slide on the installation plate on the two sides, when the two groups of sliding blocks slide, the dust cleaning brush on the sliding blocks cleans the dust on the filter plate, prevents the filter plate from being blocked, the dust filtered out falls into the dust receiving box, and after the flue gas is completely purified, the treatment is carried out, through the setting of the cleaning piece in the dust removal part, the flue dust on the filter plate can be treated in time and effectively, the filter plate is not blocked, the overall flue gas desulfurization filtration effect is higher, through the setting of the two groups of installation grooves, the dust cleaning brush can be conveniently disassembled and installed, the plug-in mode can take out the dust cleaning brush for cleaning according to needs, so that the dust cleaning operation on the filter plate can be better.

[0017] Secondly, the two sides of the dust cleaning brush are installed on the two groups of elastic reset members, on the one hand, the dust cleaning brush is prevented from directly and hard abutting against the filter plate, and long-time abutting against can scratch and wear the filter plate, and on the other hand, the dust on the filter plate can be better scraped off according to the elastic adjustment of different positions of the filter plate, and when the dust cleaning operation is specifically carried out, one side of the dust cleaning brush abuts against the elastic reset plate, and the elastic reset plate drives the two groups of reset springs connected therewith to stretch and contract in the installation groove. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of the boiler tail flue gas waste heat recovery device of the utility model;

[0019] Figure 2 It is a partial sectional view of the water storage heating tank of the utility model;

[0020] Figure 3 It is a whole structure schematic of the flue gas treatment mechanism of the utility model Figure 1 ;

[0021] Figure 4 It is a whole structure schematic of the flue gas treatment mechanism of the utility model Figure 2 ;

[0022] Figure 5 It is a whole structure schematic of the dust cleaning piece of the utility model;

[0023] Figure 6 For Figure 5 Enlarged view at A in the figure.

[0024] In the figure:

[0025] 1, the smoke pipeline; 2, water storage heating tank; 21, water inlet; 22, drain; 3, heating pipeline; 4, smoke pipeline; 5, flue gas treatment mechanism; 6, flue gas treatment tank; 61, switch cleaning door; 62, flue gas treatment observation window; 7, mounting plate; 8, dust removal part; 81, dust receiving box; 82, filter plate; 83, ash cleaning piece; 831, ash cleaning brush; 832, sliding block; 833, pull slide rod; 834, pull rod; 835, mounting groove; 84, elastic reset piece; 841, elastic reset plate; 842, reset spring; 9, desulfurization part; 91, limestone slurry storage box; 92, clamping block; 10, denitration part; 101, activated carbon adsorption plate; 102, placement strip; 11, exhaust pipe; 12, air quality monitor. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] Please refer to Figures 1-6 The above technical solutions are described in detail through the following embodiments.

[0028] A boiler tail flue gas waste heat recovery device mainly comprises a smoke pipeline 1, a water storage heating tank 2, a heating pipeline 3, a smoke pipeline 4 and a flue gas treatment mechanism 5. The heating pipeline 3 is installed in a spiral shape inside the water storage heating tank 2. One end of the smoke pipeline 1 communicates with the upper end of the heating pipeline 3 by penetrating through the water storage heating tank 2. One end of the smoke pipeline 4 communicates with the lower end of the heating pipeline 3 by penetrating through the water storage heating tank 2. The flue gas treatment mechanism 5 comprises a flue gas treatment tank 6, two mounting plates 7, a dust removal part 8, a desulfurization part 9 and a denitration part 10. The other end of the smoke pipeline 4 communicates with one side below the flue gas treatment tank 6. The two mounting plates 7 are symmetrically installed on the two side walls inside the flue gas treatment tank 6. The dust removal part 8, the desulfurization part 9 and the denitration part 10 are installed on the two mounting plates 7 in sequence from bottom to top. An exhaust pipe 11 is arranged on the top of the flue gas treatment tank 6.

[0029] The specific working process is as follows: after the water storage heating tank 2 is filled with water, the flue gas generated by the tail combustion of the boiler is transported to the heating pipeline 3 through the smoke inlet pipeline 1. Since the heating pipeline 3 is spiral, the heat can be transferred to the water in the water storage heating tank 2 through the heating pipeline 3 in the conveying process, thereby heating the water to meet the subsequent use requirements. The flue gas that has completed heat dissipation is transported to the flue gas treatment mechanism 5 through the smoke outlet pipeline 4. In the flue gas treatment mechanism 5, the flue gas is sequentially subjected to dust removal, desulfurization and denitration treatment by means of the dust removal part 8, the desulfurization part 9 and the denitration part 10 arranged on the two mounting plates 7 in the flue gas treatment tank 6. The purified flue gas is discharged through the exhaust pipe 11, effectively avoiding pollution to the environment.

[0030] Specifically, the dust removal part 8 comprises a filter plate 82, a dust collecting box 81 and a dust cleaning part 83. The dust collecting box 81 is located at the bottom of the flue gas treatment box 6 and slides on the two mounting plates 7. The filter plate 82 is installed above the dust collecting box 81 in the flue gas treatment box 6 and is inserted into the two mounting plates 7. The dust cleaning part 83 is installed below the filter plate 82. The dust cleaning part 83 comprises a dust cleaning brush 831, two groups of sliding blocks 832, two groups of pulling sliding rods 833 and a pulling rod 834. One side of each group of sliding blocks 832 is slidably arranged on the mounting plate 7 below the filter plate 82. One end of each group of pulling sliding rods 833 is connected with one group of sliding blocks 832. The other end of each group of pulling sliding rods 833 extends out of the flue gas treatment box 6. The two sides of the pulling rod 834 are connected with the other ends of the two groups of pulling sliding rods 833. An installation groove 835 is formed above each group of sliding blocks 832. An elastic reset part 84 is arranged in each installation groove 835. When the flue gas enters the flue gas treatment box 6 from the flue gas outlet pipe 4, it gradually diffuses from bottom to top. At this time, the filter plate 82 can first filter and separate the dust in the flue gas. When the dust on the filter plate 82 accumulates and affects the filtration of the filter plate 82 and the passage of flue gas, the outside pulling rod 834 is pulled by personnel operation. The pulling rod 834 drives the two groups of pulling sliding rods 833 to slide outward and extend out. The pulling sliding rods 833 drive the two groups of sliding blocks 832 to slide on the two mounting plates 7. When the two groups of sliding blocks 832 slide, the dust cleaning brush 831 above them cleans the dust on the filter plate 82 to prevent the filter plate 82 from being blocked. The filtered dust and the cleaned dust fall into the dust collecting box 81. After the flue gas is completely purified, it is treated. The two installation grooves 835 are arranged to facilitate the disassembly and installation of the dust cleaning brush 832. The plug-in mode can take out the dust cleaning brush 832 for cleaning, which can better clean the filter plate 82. The dust cleaning part 83 can effectively treat the dust on the filter plate 82 in time and prevent the filter plate 82 from being blocked, so that the flue gas desulfurization and filtration effect is high.

[0031] Each of the elastic reset members 84 comprises an elastic reset plate 841 and two sets of reset springs 842, one end of the two sets of reset springs 842 is connected with the bottom of the mounting groove 835, the elastic reset plate 841 is slidingly arranged in the mounting groove 835, the other end of the two sets of reset springs 842 is connected with the bottom of the elastic reset plate 841, by arranging the two sides of the dust cleaning brush 832 on the two sets of elastic reset members 84, on the one hand, the dust cleaning brush 832 is prevented from directly and hard abutting against the filter plate 82, which can cause scratches and wear of the filter plate 82 for a long time, on the other hand, the dust on the filter plate 82 can be better scraped down according to the thickness of the dust at different positions of the filter plate 82, and the elastic adjustment can be made, specifically, when the dust cleaning operation is performed, one side of the dust cleaning brush 832 abuts against the elastic reset plate 841, the elastic reset plate 841 drives the two sets of reset springs 842 connected therewith to stretch and contract in the mounting groove 835.

[0032] The desulfurization part 9 is composed of two sets of limestone slurry containing boxes 91 and two sets of clamping blocks 92, the two sets of clamping blocks 92 are both T-shaped, one side of each of the two sets of clamping blocks 92 is connected with one set of the limestone slurry containing boxes 91. The two sets of limestone slurry containing boxes 91 are inserted on the mounting plate 7 through the clamping blocks 92 on the respective one side. The clamping blocks 92 are designed to be T-shaped, which can more stably install and fix the limestone slurry containing boxes 91, because the limestone water contained in the limestone slurry will react with the sulfur dioxide in the flue gas to generate calcium sulfite, so sufficient bearing capacity is needed to ensure the installation and use.

[0033] The denitration part 10 is composed of an activated carbon adsorption plate 101 and two placing strips 102, the two placing strips 102 are symmetrically arranged above the two sets of mounting plates 7, the two sides of the activated carbon adsorption plate 101 are placed on the two placing strips 102, by using the adsorption characteristics of the activated carbon in the activated carbon adsorption plate 101, the nitrogen oxides in the flue gas can be adsorbed on the surface of the activated carbon, at the same time, the activated carbon also has a certain catalytic effect, which can convert part of the nitrogen oxides into nitrogen, the activated carbon adsorption plate 101 is placed on the two placing strips 102, which is convenient for regular replacement.

[0034] Further, one side of the flue gas treatment box 6 is hingedly installed with an opening and cleaning door 61, the flue gas treatment observation window 62 is installed on the opening and cleaning door 61, by opening the opening and cleaning door 61, the flue gas treatment box 6 can be opened to clean the internal components, and by means of the flue gas treatment observation window 62, various conditions in the flue gas treatment process can be observed.

[0035] In addition, the air quality monitor 12 is installed on the exhaust pipe 11, which is used for monitoring the quality of the discharged air.

[0036] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the present application, and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative efforts, and these embodiments will all fall within the protection scope of the claims of the present application.

Claims

1. A waste heat recovery device for boiler tail flue gas, characterized in that: The system includes an inlet duct (1), a water storage heating tank (2), a heating duct (3), an outlet duct (4), and a flue gas treatment mechanism (5). The heating duct (3) is installed in a spiral shape inside the water storage heating tank (2). One end of the inlet duct (1) passes through the water storage heating tank (2) and connects to the upper end of the heating duct (3). One end of the outlet duct (4) passes through the water storage heating tank (2) and connects to the lower end of the heating duct (3). The flue gas treatment mechanism (5) includes a flue gas treatment box (6). Two mounting plates (7), a dust removal section (8), a desulfurization section (9) and a denitrification section (10) are installed. The other end of the flue gas outlet pipe (4) is connected to one side below the flue gas treatment box (6). The two mounting plates (7) are symmetrically installed on the two side walls inside the flue gas treatment box (6). The dust removal section (8), the desulfurization section (9) and the denitrification section (10) are installed on the two mounting plates (7) in order from bottom to top. An exhaust pipe (11) is provided on the top of the flue gas treatment box (6).

2. The boiler tail flue gas waste heat recovery device according to claim 1, characterized in that: The dust removal unit (8) includes a dust collection box (81), a filter plate (82), and a dust removal component (83). The dust collection box (81) is located at the bottom of the flue gas treatment box (6), and its two sides slide on two mounting plates (7). The filter plate (82) is installed above the dust collection box (81) in the flue gas treatment box (6), and its two sides are inserted into the two mounting plates (7). The dust removal component (83) is installed directly below the filter plate (82). The dust removal component (83) includes a dust removal brush (831), two sets of sliding blocks (832), two sets of pull rods (833), and a pull rod (834). One side of each of the two sets of sliding blocks (832) is slidably positioned on the filter plate (82). On the mounting plates (7) on both sides below, one end of each of the two sets of pull rods (833) is connected to a set of sliding blocks (832). The other ends of the two sets of pull rods (833) pass through the flue gas treatment box (6) and extend to the outside of the flue gas treatment box (6). The two sides of the pull rod (834) are connected to the ends of the two sets of pull rods (833) located outside the flue gas treatment box (6). The outer side of each set of sliding blocks (832) is provided with a mounting groove (835). Each set of mounting grooves (835) is provided with an elastic reset member (84). The two sides of the cleaning brush (831) are placed on the two sets of elastic reset members (84) through the mounting grooves (835).

3. The boiler tail flue gas waste heat recovery device according to claim 2, characterized in that: Each set of elastic reset components (84) includes an elastic reset plate (841) and two sets of reset springs (842). One end of each set of reset springs (842) is connected to the bottom of the mounting groove (835). The elastic reset plate (841) is slidably disposed in the mounting groove (835), and the other end of each set of reset springs (842) is connected to the bottom of the elastic reset plate (841).

4. The boiler tail flue gas waste heat recovery device according to claim 1, characterized in that: The desulfurization section (9) consists of two sets of limestone slurry containers (91) and two sets of locking blocks (92). Both sets of locking blocks (92) are T-shaped. One side of each set of locking blocks (92) is connected to one set of limestone slurry containers (91). The two sets of limestone slurry containers (91) are inserted into the mounting plate (7) through the locking blocks (92) on their respective sides.

5. The boiler tail flue gas waste heat recovery device according to claim 1, characterized in that: The denitrification section (10) consists of an activated carbon adsorption plate (101) and two placement strips (102). The two placement strips (102) are symmetrically arranged above the two sets of mounting plates (7), and the two sides of the activated carbon adsorption plate (101) are placed on the two placement strips (102).

6. The boiler tail flue gas waste heat recovery device according to claim 1, characterized in that: A switchable cleaning door (61) is hinged to one side of the flue gas treatment box (6), and a flue gas treatment observation window (62) is installed on the switchable cleaning door (61).

7. The boiler tail flue gas waste heat recovery device according to claim 1, characterized in that: An air quality monitor (12) is installed on the exhaust pipe (11).

8. The boiler tail flue gas waste heat recovery device according to claim 1, characterized in that: The water storage heating tank (2) has a water inlet (21) on the top and a drain outlet (22) on the side below it.

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