Boiler waste heat recovery device

Abstract

The utility model relates to the technical field of waste heat recovery, and discloses a boiler waste heat recovery device which comprises a heat exchange box, recovery boxes are connected to the two sides of the heat exchange box, box covers are connected to the tops of the two recovery boxes, dust filtering assemblies are arranged in the two recovery boxes, and smoke guide-in assemblies are arranged on the outer sides of the two recovery boxes. The smoke guiding-in assembly penetrates through the two box covers and is connected with the two dust filtering assemblies, a smoke guiding-out assembly is further connected between the two box covers, the two ends of the heat exchange box are fixedly connected and communicate with water pipes, and the bottoms of the heat exchange box and the two recycling boxes are connected with supporting assemblies. According to the boiler waste heat recovery device, flue gas is guided into the recovery box, so that the flue gas is in full contact with liquid in the recovery box, particles in the flue gas are in full contact with the liquid in the recovery box for heat exchange, and therefore heat in the flue gas is fully recovered; and therefore, the recovered heat is guided into the heat exchange box, and the boiler waste heat recovery efficiency is improved.

Description

TECHNICAL FIELD

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

[0002] In industrial production and commercial applications, boilers are commonly used to generate steam or hot water to meet heating or other process requirements. However, during this process, a portion of the energy is often discharged into the environment through exhaust gas, cooling water, or other forms without being effectively utilized. In order to recover this portion of lost energy, a waste heat recovery device can be installed.

[0003] The patent with the current announcement number CN221349792U discloses a boiler waste heat recovery device, which includes a recovery tank, a support leg fixedly installed on the top of the recovery tank, a water inlet fixedly installed on the front end outer wall of the recovery tank, a water outlet fixedly installed on the left side outer wall of the recovery tank, a water pipe fixedly installed between the water inlet and the water outlet, an air inlet fixedly installed on the top of the recovery tank, and a rectangular box fixedly installed on the left side outer wall of the recovery tank. The boiler waste heat recovery device provided by the utility model drives the first rotating shaft through the motor, so that the first rotating shaft drives the semispherical blocks to continuously reciprocate up and down through the first rectangular plate, the second rectangular plate, and the round rod to knock the outer wall of the water pipe, thereby shaking off the dust attached to the outer wall of the water pipe. This greatly improves the heat conduction performance of the water pipe and, in turn, improves the utilization rate of flue gas and saves costs.

[0004] However, the waste heat recovery device in the above-mentioned technology still has the following problems: Although the waste heat recovery device has effectively recovered part of the waste heat from the boiler flue gas, significantly improving the energy utilization efficiency, however, the flue gas still contains a large amount of dust with waste heat, and the heat carried by these dust cannot be effectively recovered, which will result in a large amount of heat loss and affect the overall energy utilization efficiency. SUMMARY

[0005] In view of the deficiencies of the prior art, the utility model provides a boiler waste heat recovery device to further improve the flue gas waste heat recovery effect.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a boiler waste heat recovery device, which includes a heat exchange tank, two recovery tanks connected to the two sides of the heat exchange tank, a tank cover connected to the top of each of the two recovery tanks, a dust filtering assembly arranged in each of the two recovery tanks, a flue gas introduction assembly arranged on the outer side of each of the two recovery tanks, the flue gas introduction assembly penetrating through the two tank covers and being connected to the two dust filtering assemblies, a flue gas outlet assembly connected between the two tank covers, a water pipe fixedly connected to and communicating with each end of the heat exchange tank, and a support assembly connected to the bottom of the heat exchange tank and the two recovery tanks.

[0007] Further, the smoke gas leading-in assembly comprises a smoke gas duct and two air inlet pipes, one end of the smoke gas duct is communicated with an external smoke dust pipeline, the other end is fixedly connected with the two air inlet pipes through a three-way pipe and is communicated, the other end of the two air inlet pipes is respectively penetrated through two tank covers and is connected with the dust filtering assembly in the recovery tank.

[0008] Further, the dust filtering assembly comprises a dust filtering cloth bag, a support frame and two flanges, one of the flanges is fixedly connected with the end of the air inlet pipe penetrated through the tank cover, the two flanges are fixedly connected through a plurality of bolts and nuts, the other flange is fixedly connected with the support frame on the side away from the air inlet pipe, the dust filtering cloth bag is sleeved with the support frame and is fixedly connected with the adjacent flange.

[0009] Further, the outer wall of the two air inlet pipes close to one end of the smoke gas duct is fixedly connected with an air inlet valve.

[0010] Further, the smoke gas leading-out assembly comprises a negative pressure pump and two air outlet pipes, the two air outlet pipes are fixedly connected with the two tank covers and are communicated, the air inlet end of the negative pressure pump is fixedly connected with the two air outlet pipes through a three-way pipe and is communicated, the air outlet end of the negative pressure pump is connected with a smoke gas treatment device.

[0011] Further, the outer wall of the two air outlet pipes close to one end of the negative pressure pump is fixedly connected with an air outlet valve.

[0012] Further, the support assembly comprises a base and two symmetrical support frames, the two support frames are respectively fixedly connected with the two ends of the bottom of the heat exchange tank, the other end of the two support frames is fixedly connected with the base, the bottom of the two recovery tanks is connected with a lifter, the other end of the four lifters is fixedly connected with the base, and the telescopic end of the lifter is fixedly connected with the bottom of the recovery tank.

[0013] Further, the side of the two recovery tanks close to the heat exchange tank is slidably connected with the support frame and the side wall of the heat exchange tank.

[0014] Compared with the prior art, the boiler waste heat recovery device has the following beneficial effects:

[0015] The boiler waste heat recovery device has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole appearance connection structure schematic view of the utility model;

[0017] Figure 2 It is another whole appearance connection structure schematic view of the utility model.

[0018] Figure 3 Another angle connection structure schematic view of the heat exchange box and two recovery boxes of the utility model;

[0019] Figure 4 The bottom connecting structure schematic view of the box cover of the utility model;

[0020] Figure 5 The explosion schematic view of the air inlet pipe and the dust filtering assembly connecting structure of the utility model.

[0021] In the figure: 1, heat exchange box; 2, recovery box; 3, box cover; 4, water pipe; 5, flue gas guide pipe; 6, air inlet pipe; 7, dust filtering bag; 8, support frame; 9, flange plate; 10, air inlet valve; 11, negative pressure pump; 12, air extraction pipe; 13, air extraction valve; 14, base; 15, support frame; 16, lifter. DETAILED DESCRIPTION

[0022] 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, not all the embodiments.

[0023] Please refer to Figures 1 to 5 A boiler waste heat recovery device, including heat exchange box 1, the both sides of heat exchange box 1 are connected with recovery box 2, the top of two recovery boxes 2 is connected with box cover 3, two recovery boxes 2 are equipped with dust filtering assembly, the outside of two recovery boxes 2 is equipped with flue gas guide-in assembly, flue gas guide-in assembly penetrates two box covers 3, and is connected with two dust filtering assemblies, two box covers 3 are further connected with flue gas guide-out assembly, the both ends of heat exchange box 1 are fixedly connected and are communicated with water pipe 4, heat exchange box 1 is connected with the bottom of two recovery boxes 2 with support assembly.

[0024] As Figures 1 to 5 The boiler waste heat recovery device of the utility model is similar to the structure of the existing boiler waste heat recovery device, and the main improvement point of the utility model is to further improve the flue gas waste heat recovery effect, as Figures 1 to 5As shown, the boiler waste heat recovery device in the utility model in using, boiler flue gas through flue gas import subassembly respectively with two recovery tank 2 communication, and in recovery tank 2 inject appropriate amount of water, subsequently boiler flue gas through flue gas import subassembly enters recovery tank 2 in, through filter dust subassembly dispersion to the water in recovery tank 2, to make the particle in flue gas remain in filter dust subassembly, and gas is in full contact with water and the heat is transferred to the water in recovery tank 2 after, and go up and through flue gas export subassembly discharge recovery tank 2, utilize water and gas full contact, improve boiler flue gas waste heat recovery effect, and the water in recovery tank 2 is heated, through the contact between recovery tank 2 and heat exchange tank 1, heat is transferred to the water in heat exchange tank 1, and through the water pipe 4 of both ends of heat exchange tank 1, make the water in heat exchange tank 1 be in flow state, improve the efficiency of heat recovery tank 2 to heat exchange tank 1 heat exchange, and the particle in flue gas is left in filter dust subassembly, and is fully contacted with the water in recovery tank 2, and the waste heat recovery of particle is recovered, further improve the filtering flue gas waste heat recovery effect, wherein the water pipe 4 position of both ends of heat exchange tank 2 is high and low, for injecting cold water and discharging hot water.

[0025] As Figures 1 to 5 Shown, flue gas import subassembly includes flue gas duct 5 and two air inlet pipes 6, the one end of flue gas duct 5 is communicated with the outside smoke dust pipeline, the other end is fixedly connected with two air inlet pipes 6 through tee pipe and is communicated, the other end of two air inlet pipes 6 is respectively penetrated through two tank covers 3 and is connected with filter dust subassembly in recovery tank 2.Boiler flue gas is sent to two air inlet pipes 6 through flue gas duct 5 respectively, and makes flue gas enter filter dust subassembly from air inlet pipe 6 downward, completes the import heat exchange recovery operation of boiler flue gas.

[0026] As Figures 2 to 5 Shown, filter dust subassembly includes filter dust cloth bag 7, support frame 8 and two flange plates 9, wherein one flange plate 9 is fixedly connected with the one end of air inlet pipe 6 penetrated tank cover 3, two flange plates 9 are fixedly connected through a plurality of bolts and nuts, the other flange plate 9 is fixedly connected with support frame 8 on the side away from air inlet pipe 6, filter dust cloth bag 7 is sleeved with support frame 8 and is fixedly connected with adjacent flange plate 9.Boiler flue gas enters filter dust cloth bag 7 through air inlet pipe 6, and the particle is left in filter dust cloth bag 7, and the gas is emitted through the small mesh of filter dust cloth bag 7 and is contacted with the waste heat recovery water in recovery tank 2, and the heat exchange operation of temperature in flue gas is completed, wherein support frame 8 can support filter dust cloth bag 7, avoid filter dust cloth bag 7 to sway in water, influence gas to escape, simultaneously through two flange plates 9, can conveniently filter dust cloth bag 7 is detached from the bottom of air inlet pipe 6, and the particle of internal filtration is cleaned.

[0027] As Figures 1 to 4As shown, the outer wall of the two air inlet pipes 6 near one end of the flue gas guide pipe 5 is fixedly connected with an air inlet valve 10. By installing the air inlet valve 10 on the two air inlet pipes 6, the flue gas can be prevented from entering the recycling box 2 during the cleaning, replacement or installation of one of the dust filter bags 7, thereby avoiding leakage of flue gas.

[0028] As shown in the drawings, Figures 1 to 5 The flue gas guide assembly includes a negative pressure pump 11 and two air suction pipes 12, the two air suction pipes 12 are fixedly connected with and communicate with the two box covers 3, the air inlet end of the negative pressure pump 11 is fixedly connected with and communicates with the two air suction pipes 12 through a three-way pipe fitting, and the air outlet end of the negative pressure pump 11 is connected with a flue gas treatment device. The negative pressure pump 11 can suck the air in the two recycling boxes 2 out through the two air suction pipes 12, so as to generate negative pressure in the recycling boxes 2, and utilize the negative pressure to suck the unfiltered boiler flue gas into the waste heat recovery water in the recycling boxes 2 through the air inlet pipes 6.

[0029] As shown in the drawings, Figures 1 to 5 The outer wall of the two air suction pipes 12 near one end of the negative pressure pump 11 is fixedly connected with an air suction valve 13. When one of the recycling boxes 2 needs to be opened for maintenance, the air suction valve 13 of the corresponding air suction pipe 12 can be closed, so as to avoid the negative pressure pump 11 generating suction force in the opened recycling box 2, and cooperate with the corresponding air inlet valve 10 to better control whether the flue gas is introduced or discharged in the two recycling boxes 2.

[0030] As shown in the drawings, Figure 1 and Figure 2 The support assembly includes a base 14 and two symmetrically arranged support frames 15, the two support frames 15 are fixedly connected with the bottom of the heat exchange box 1 at two ends, the other ends of the two support frames 15 are fixedly connected with the base 14, the bottom of the two recycling boxes 2 is connected with a lifter 16 at two ends, the other ends of the four lifters 16 are fixedly connected with the base 14, and the telescopic end of the lifter 16 is fixedly connected with the bottom of the recycling box 2. The heat exchange box 1 is supported by the support frame 15 and kept in place, and the two recycling boxes 2 can be lifted and lowered through the lifters 16 at the bottom. When the dust filter bag 7 in the recycling box 2 needs to be cleaned, the corresponding recycling box 2 can be retracted downward, so that the dust filter bag 7 is exposed. At this time, the other air inlet pipe 6, recycling box 2 and air suction pipe 12 form a waste heat recovery and filtration operation pipeline, so that the boiler flue gas waste heat recovery continues, and the waste heat recovery efficiency is improved. After the cleaning of the dust filter bag 7 is completed, the recycling box 2 can be lifted upward again through the lifter 16 and abutted against the box cover 3 below, thereby forming a closed effect. The connection between the box cover 3 and the recycling box 2 can be provided with an airtight pad to improve the sealing effect of the box cover 3 and the recycling box 2.

[0031] As shown in the drawings, Figures 1 to 5As shown, two recycling boxes 2 are close to one side of the heat exchange box 1 and are in sliding connection with the support frame 15 and the side wall of the heat exchange box 1. The two recycling boxes 2 are always attached to the side of the heat exchange box 1, so that the waste heat collected by the recycling boxes 2 can be exchanged to the heat exchange box 1 through the contact with the side of the heat exchange box 1, and the waste heat collection operation is completed.

[0032] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application.

Claims

1. A boiler waste heat recovery device comprising a heat exchange box (1), characterized in that: Both sides of the heat exchange box (1) are connected with recovery boxes (2), the top of the two recovery boxes (2) is connected with box covers (3), the two recovery boxes (2) are both provided with dust filtering assemblies, the outer side of the two recovery boxes (2) is provided with flue gas introduction assemblies, the flue gas introduction assemblies penetrate through the two box covers (3) and are connected with the two dust filtering assemblies, the flue gas introduction assemblies are also connected with flue gas outlet assemblies between the two box covers (3), both ends of the heat exchange box (1) are fixedly connected with and communicated with water pipes (4), and the heat exchange box (1) is connected with support assemblies at the bottom of the two recovery boxes (2).

2. A boiler heat recovery device according to claim 1, characterised in that: The flue gas introduction assembly comprises a flue gas duct (5) and two air inlet pipes (6), one end of the flue gas duct (5) is communicated with an external flue dust pipeline, the other end of the flue gas duct (5) is fixedly connected with and communicated with the two air inlet pipes (6) through a three-way pipe fitting, and the other end of each air inlet pipe (6) penetrates through the two box covers (3) and is connected with the dust filtering assembly in the recovery box (2).

3. A boiler heat recovery device according to claim 2, characterised in that: The dust filtering assembly comprises a dust filtering bag (7), a support frame (8) and two flange plates (9), one flange plate (9) is fixedly connected with one end of the air inlet pipe (6) penetrating through the box cover (3), the two flange plates (9) are fixedly connected through a plurality of bolts and nuts, the other flange plate (9) is fixedly connected with the support frame (8) on the side away from the air inlet pipe (6), and the dust filtering bag (7) is sleeved on the support frame (8) and fixedly connected with the adjacent flange plate (9).

4. A boiler heat recovery device according to claim 2 or 3, characterised in that: The outer wall of each air inlet pipe (6) close to one end of the flue gas duct (5) is fixedly connected with an air inlet valve (10).

5. A boiler heat recovery apparatus according to claim 1, 2 or 3, characterised in that: The flue gas outlet assembly comprises a negative pressure pump (11) and two air outlet pipes (12), the two air outlet pipes (12) are fixedly connected with and communicated with the two box covers (3), the air inlet end of the negative pressure pump (11) is fixedly connected with and communicated with the two air outlet pipes (12) through a three-way pipe fitting, and the air outlet end of the negative pressure pump (11) is connected with a flue gas treatment device.

6. A boiler heat recovery device according to claim 5, characterised in that: The outer wall of each air outlet pipe (12) close to one end of the negative pressure pump (11) is fixedly connected with an air outlet valve (13).

7. A boiler heat recovery apparatus according to claim 1, 2, 3 or 6, characterised in that: The support assembly comprises a base (14) and two symmetrically arranged support frames (15), the two support frames (15) are respectively fixedly connected with both ends of the bottom of the heat exchange box (1), the other end of each support frame (15) is fixedly connected with the base (14), the bottom of each recovery box (2) is connected with a lifter (16), the other end of each of the four lifters (16) is fixedly connected with the base (14), and the telescopic end of the lifter (16) is fixedly connected with the bottom of the recovery box (2).

8. A boiler heat recovery device according to claim 7, characterised in that: The side of each recovery box (2) close to the heat exchange box (1) is slidably connected with the support frame (15) and the side wall of the heat exchange box (1).

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