Steam engine waste heat recovery device

Abstract

A steam engine waste heat recovery device belongs to the technical field of waste heat recovery and comprises a flue connecting pipe, an expansion pipe is mounted at the right end of the flue connecting pipe, a filter box is mounted at the right end of the expansion pipe in a communicated manner, a smoke particle filter element is detachably mounted in the filter box, and a V-shaped pipe is mounted at the right end of the filter box in a communicated manner. A water guide pipe is fixedly installed at the corner of the outer surface of the V-shaped pipe and communicated with the V-shaped pipe, a spoiler is fixedly welded in the V-shaped pipe and located on the left side of the water guide pipe, a water storage tank is fixedly installed at the lower end of the water guide pipe, a drain pipe with a valve is fixedly installed on the right surface of the water storage tank, and a fan is fixedly installed at the end, away from the filter box, of the V-shaped pipe. According to the boiler flue heat exchanger, water drops and condensed beads generated by heat exchange can be blocked by the flow blocking plate and are guided into the water storage tank through the water guide pipe to be collected, the water drops can be effectively prevented from falling back to the boiler flue again, and therefore the service life of the boiler flue heat exchanger is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat recovery, and in particular relates to a waste heat recovery device for a steam engine. Background Art

[0002] The boiler is an indispensable part of the steam engine. During its operation, when the water is burned to heat the raw materials, the high-temperature flue gas generated is discharged through the chimney, resulting in a large amount of heat loss. In order to reduce energy waste, a waste heat recovery device must be used to reduce energy loss.

[0003] After searching, the Chinese authorized patent in the relevant field, the patent publication number is: CN219454796U, the patent name is: A waste heat recovery device for a boiler, whose structure specifically includes a bottom cylinder, a fixed flange is installed on the outer wall of the bottom end of the bottom cylinder, a waste heat recovery cylinder is installed on the top of the bottom cylinder through a connecting flange, a positioning bracket is installed on the inner wall of the bottom cylinder and located near the top, a positioning pile is installed on the end of the positioning bracket away from the bottom cylinder, a positioning shaft is rotatably installed on the top of the positioning pile through a bearing, a blocking blade is installed on the outer wall of the top end of the positioning shaft, an insulation cavity is opened inside the side wall of the waste heat recovery cylinder, and the interior of the waste heat recovery cylinder is located An outer water cavity is opened at the position outside the insulation cavity, a water supply pipe is installed on the outer wall of the waste heat recovery cylinder and near the bottom of the outer water cavity, the water supply pipe is connected with the inner part of the outer water cavity, a heat absorption hole is opened inside the waste heat recovery cylinder and located on the inner side of the insulation cavity, a connecting opening is opened between the top of the outer water cavity and the top of the heat absorption hole, a connecting pipe is installed inside the insulation cavity and located outside the connecting opening, the connecting opening and the connecting pipe connect the top of the outer water cavity and the top of the heat absorption hole, a drainage hole is opened at the bottom of the waste heat recovery cylinder and located opposite to the bottom end of the heat absorption hole, a drainage pipe is installed on the surface of the bottom cylinder body, and the drainage hole passes through the bottom cylinder body and is connected with the top of the drainage pipe.

[0004] Waste heat is prone to produce water droplets when the temperature difference is large during the heat exchange process. This is because during the heat exchange process, high-temperature gas or liquid will release some heat when it comes into contact with low-temperature gas or liquid. When the temperature difference is large, the speed and efficiency of heat transfer will increase, making it easier for water molecules on the surface of the high-temperature material to condense into water droplets when they come into contact with the low-temperature material;

[0005] However, the waste heat recovery device in the above-mentioned prior art is not convenient for recovering the water droplets, and the water droplets are easy to fall back into the flue of the boiler, affecting the service life of the boiler flue. In order to solve this technical problem, a steam engine waste heat recovery device is specially provided. Utility Model Content

[0006] With regard to the waste heat recovery device in the prior art, it is inconvenient to collect water droplets during heat exchange, and the falling water droplets affect the service life of the filter flue. The utility model provides a waste heat recovery device for a steam engine, which is provided with a V-shaped tube, and a baffle and a water guide pipe are respectively provided inside and outside the V-shaped tube, and a water storage tank with a valved drain pipe is installed at the lower end of the water guide pipe. The baffle can be used to block the water droplets generated during heat exchange, and the water guide pipe can be used to guide the water droplets into the water storage tank for collection, which can prevent the water droplets from falling into the flue, and effectively solves the problem that the waste heat recovery device in the prior art is inconvenient to collect water droplets during heat exchange, and the falling water droplets affect the service life of the filter flue. The specific technical scheme is as follows:

[0007] A steam engine waste heat recovery device comprises a flue connecting pipe, an expansion pipe is installed at the right end of the flue connecting pipe, a filter box is installed in the right end of the expansion pipe, a smoke particle filter element is detachably installed in the filter box, a V-shaped pipe is installed in the right end of the filter box, a water guide pipe is fixedly installed at the corner of the outer surface of the V-shaped pipe, the water guide pipe is connected to the V-shaped pipe, a baffle is fixedly installed in the V-shaped pipe, the baffle is located on the left side of the water guide pipe, a water storage tank is fixedly installed at the lower end of the water guide pipe, a drain pipe with a valve is fixedly installed on the right surface of the water storage tank, a fan is fixedly installed at one end of the V-shaped pipe away from the filter box, and a heat exchange pipe is fixedly installed on the inner wall of the V-shaped pipe, and the water inlet end and the drain end of the heat exchange pipe are both arranged on the outside of the V-shaped pipe.

[0008] In the above technical solution, an opening is provided at the top of the filter box, and a sealing cover is rotatably installed on the upper surface of the filter box. The sealing cover is L-shaped, and when the lower surface of the sealing cover is in contact with the upper surface of the filter box, the sealing cover seals the opening, and bolts are fixedly installed between the front end of the sealing cover and the front surface of the filter box.

[0009] In the above technical solution, two adapter blocks are symmetrically fixedly installed on the upper surface of the filter box, and an adapter shaft is fixedly installed on the right end of the sealing cover, and the adapter shaft is rotatably installed between the two adapter blocks.

[0010] In the above technical solution, two springs are symmetrically fixedly installed at the bottom of the inner cavity of the filter box, a lifting plate is fixedly installed between the top ends of the two springs, and the smoke particle filter element is clamped by the lifting plate and the sealing cover and installed in the filter box.

[0011] In the above technical solution, the outer surface of the smoke particle filter element is in contact with the inner wall of the filter box.

[0012] In the above technical solution, a rubber sealing block is fixedly mounted on the lower surface of the sealing cover, the rubber sealing block is embedded in the opening of the filter box, and the outer surface of the rubber sealing block is in contact with the inner wall of the filter box.

[0013] In the above technical solution, the heat exchange tube is coiled and arranged in a V-shaped tube.

[0014] Compared with the prior art, the utility model of a steam engine waste heat recovery device has the following beneficial effects:

[0015] 1. The utility model configures a V-shaped tube, and installs a baffle and a water guide pipe on the inner and outer sides of the V-shaped tube respectively, and equips a water storage tank with a valve drain pipe at the bottom of the water guide pipe, so as to achieve the purpose of using the baffle to block the water droplets generated by heat exchange, and guide them into the water storage tank through the water guide pipe for collection, which can effectively prevent the water droplets from falling back into the boiler flue, thereby extending its service life.

[0016] 2. The utility model sets a filter box with a smoke particle filter between the extension tube and the V-tube, so that the smoke particle filter can filter the particles in the smoke before the hot smoke enters the V-tube, which can effectively prevent the particles in the smoke from adhering to the outer surface of the heat exchange tube when the smoke contacts the heat exchange tube, thereby reducing the heat exchange efficiency of the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the filter box of the present utility model.

[0020] Figure 4 It is a bottom view of the structure of the sealing cover plate of the utility model.

[0021] Figure 1-4 Among them: 1. Flue connecting pipe; 11. Expansion pipe; 2. Filter box; 21. Smoke particle filter element; 22. Sealing cover; 221. Bolt; 222. Adapter shaft; 223. Rubber sealing block; 23. Spring; 24. Lifting plate; 25. Adapter block; 3. V-shaped pipe; 31. Water guide pipe; 32. Baffle; 33. Water storage tank; 331. Drain pipe with valve; 4. Fan; 5. Heat exchange tube. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 4 , the utility model provides a technical solution:

[0024] A steam engine waste heat recovery device comprises a flue connecting pipe 1, an expansion pipe 11 is installed at the right end of the flue connecting pipe 1 through a flange, a filter box 2 is installed at the right end of the expansion pipe 11 through a flange, a smoke particle filter element 21 is detachably installed in the filter box 2, a V-shaped pipe 3 is installed at the right end of the filter box 2 through a flange, a water guide pipe 31 is welded and fixedly installed at the corner of the outer surface of the V-shaped pipe 3, the water guide pipe 31 is connected to the V-shaped pipe 3, a baffle plate 32 is welded and fixedly installed in the V-shaped pipe 3, the baffle plate 32 is located on the left side of the water guide pipe 31, a water storage tank 33 is fixedly installed at the lower end of the water guide pipe 31, a drain pipe 331 with a valve is fixedly installed on the right surface of the water storage tank 33, a fan 4 is fixedly installed at one end of the V-shaped pipe 3 away from the filter box 2, and a heat exchange pipe 5 is fixedly installed on the inner side wall of the V-shaped pipe 3, and the water inlet end and the drain end of the heat exchange pipe 5 are both arranged outside the V-shaped pipe 3;

[0025] Before use, install the flue connecting pipe 1 to the flue outlet of the flue through flanges and bolts, then connect the water inlet end of the heat exchange tube 5 to the external cold water supply equipment, connect the water discharge end of the heat exchange tube 5 to the external hot water recovery equipment, and then start the fan 4 to recover the waste heat in the hot smoke into the V-shaped tube 3 for heat exchange with the cold water in the heat exchange tube 5;

[0026] When in use, the hot smoke in the boiler flue enters the filter box 2 from the flue connecting pipe 1 and the expansion pipe 11, and the smoke particles are filtered by the smoke particle filter element 21. The filtered hot smoke enters the V-shaped tube 3. Under the guidance of the fan 4, the residual heat in the flue gas contacts the heat exchange tube 5 to achieve heat exchange. In this process, the condensed water droplets slide along the tube wall of the V-shaped tube 3 to the corner of the inner cavity under the action of gravity, and enter the water guide pipe 31 under the guidance of the baffle plate 32. The water droplets are drained through the water guide pipe 31 and gathered in the water storage tank 33. After the flue gas is cooled, it is finally discharged from the upper end of the V-shaped tube 3.

[0027] It should be noted that, combined with Figure 1 and Figure 2As shown, an opening is provided at the top of the filter box 2, and a sealing cover 22 is rotatably installed on the upper surface of the filter box 2. The sealing cover 22 is L-shaped. When the lower surface of the sealing cover 22 is in contact with the upper surface of the filter box 2, the sealing cover 22 seals the opening. Bolts 221 are fixedly installed between the front end of the sealing cover 22 and the front surface of the filter box 2. After the bolts 221 are removed, the sealing cover 22 can be flipped upwards, and the opening of the filter box 2 can be opened to replace the smoke particle filter element 21 inside it.

[0028] Specifically, if Figure 3 As shown, two adapter blocks 25 are symmetrically fixedly installed on the upper surface of the filter box 2. Figure 4 As shown, a transfer shaft 222 is fixedly installed at the right end of the sealing cover 22. After the transfer shaft 222 is rotatably installed between the two transfer blocks 25, the sealing cover 22 is rotatably connected to the filter box 2.

[0029] To further enhance the sealing effect between the sealing cover 22 and the filter box 2, as Figure 4 As shown, a rubber sealing block 223 is fixedly installed on the lower surface of the sealing cover 22. When the sealing cover 22 is buckled on the upper surface of the filter box 2, the rubber sealing block 223 is embedded in the opening of the filter box 2, and the outer surface of the rubber sealing block 223 is in contact with the inner wall of the filter box 2. The rubber sealing block 223 can be used to enhance the sealing effect between the sealing cover 22 and the filter box 2.

[0030] In addition, when replacing the smoke and dust particle filter element 21, in order to facilitate its rapid removal from the filter box 2, as shown in FIG. Figure 3 As shown, two springs 23 are symmetrically fixedly installed at the bottom of the inner cavity of the filter box 2, and a lifting plate 24 is fixedly installed between the top ends of the two springs 23. The smoke particle filter element 21 is clamped by the lifting plate 24 and the sealing cover 22 and installed in the filter box 2. When the sealing cover 22 is flipped open, the extension force of the springs 23 and the lifting plate 24 can be used to lift the smoke particle filter element 21 upward, so that the top of the smoke particle filter element 21 is exposed from the filter box 2, making it easier to take out and replace it quickly.

[0031] In addition, in order to ensure the particle filtering effect of the flue gas, it is necessary to select a smoke particle filter element 21 of appropriate size. After installation, the outer surface of the smoke particle filter element 21 is fitted with the inner wall of the filter box 2. This can ensure that the smoke will not pass through the gap between the smoke particle filter element 21 and the inner wall of the filter box 2, thereby ensuring the filtering effect.

[0032] Finally, in order to enhance the heat exchange efficiency, the heat exchange tube 5 should be arranged in the V-shaped tube 3 in a multi-turn coiling manner. Such a coiling manner can expand the contact area with the hot air flow, thereby improving the heat exchange efficiency.

Claims

1. A steam engine waste heat recovery device, comprising a flue connecting pipe (1), wherein an expansion pipe (11) is installed at the right end of the flue connecting pipe (1), characterized in that: The right end of the expansion tube (11) is connected to a filter box (2) installed therein, a smoke particle filter element (21) is detachably installed in the filter box (2), the right end of the filter box (2) is connected to a V-shaped tube (3) installed therein, a water guide tube (31) is fixedly installed at a corner of the outer surface of the V-shaped tube (3), the water guide tube (31) is connected to the V-shaped tube (3), a flow baffle (32) is fixedly installed in the V-shaped tube (3), and the flow baffle (32) Located on the left side of the water guide pipe (31), a water storage tank (33) is fixedly mounted at the lower end of the water guide pipe (31), a drain pipe (331) with a valve is fixedly mounted on the right surface of the water storage tank (33), a fan (4) is fixedly mounted on one end of the V-shaped pipe (3) away from the filter box (2), and a heat exchange pipe (5) is fixedly mounted on the inner wall of the V-shaped pipe (3), and the water inlet end and the drain end of the heat exchange pipe (5) are both arranged outside the V-shaped pipe (3).

2. A steam engine waste heat recovery device according to claim 1, characterized in that: The top of the filter box (2) is provided with an opening, and a sealing cover (22) is rotatably mounted on the upper surface of the filter box (2), the sealing cover (22) being L-shaped, and when the lower surface of the sealing cover (22) is in contact with the upper surface of the filter box (2), the sealing cover (22) seals the opening, and a bolt (221) is fixedly mounted between the front end of the sealing cover (22) and the front surface of the filter box (2).

3. A steam engine waste heat recovery device according to claim 2, characterized in that: Two adapter blocks (25) are symmetrically fixedly mounted on the upper surface of the filter box (2), and an adapter shaft (222) is fixedly mounted on the right end of the sealing cover (22), and the adapter shaft (222) is rotatably mounted between the two adapter blocks (25).

4. A steam engine waste heat recovery device according to claim 3, characterized in that: Two springs (23) are symmetrically fixedly mounted at the bottom of the inner cavity of the filter box (2), a lifting plate (24) is fixedly mounted between the top ends of the two springs (23), and the smoke particle filter element (21) is clamped by the lifting plate (24) and the sealing cover (22) and mounted in the filter box (2).

5. The steam engine waste heat recovery device according to claim 1, characterized in that: The outer surface of the smoke particle filter element (21) is in contact with the inner wall of the filter box (2).

6. A steam engine waste heat recovery device according to claim 2, characterized in that: A rubber sealing block (223) is fixedly mounted on the lower surface of the sealing cover (22); the rubber sealing block (223) is embedded in the opening of the filter box (2), and the outer surface of the rubber sealing block (223) is in contact with the inner wall of the filter box (2).

7. The steam engine waste heat recovery device according to claim 1, characterized in that: The heat exchange tube (5) is coiled and arranged inside the V-shaped tube (3).

Images