Waste heat recycling device

Abstract

The utility model discloses a waste heat recycling device which comprises a heat recovery outer cylinder and a digestion inner cylinder, the digestion inner cylinder is fixedly installed in the heat recovery outer cylinder, and an inner cylinder sealing cover is fixedly installed at the top end of the digestion inner cylinder; a water bath guide pipe is fixedly connected to the bottom of the outer wall of one side of the heat recovery outer barrel, a second three-way valve is fixedly installed at one end of the water bath guide pipe, a water inlet guide pipe is fixedly installed at one water outlet of the second three-way valve, a first three-way valve is fixedly installed at one end of the water inlet guide pipe, and a first water supply pump is fixedly installed at a water inlet of the first three-way valve. According to the waste heat recycling and reusing device, heat generated in the quick lime digestion process is fully absorbed through water flow in the heat recycling outer barrel, the water flow absorbing the heat is guided into the digestion inner barrel, the digestion speed of quick lime is increased, the production quality of calcium hydroxide is improved, and waste heat generated by quick lime digestion is fully recycled and reutilized.

Description

Technical Field

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

[0002] In the prior art, calcium hydroxide is usually produced by adding calcium oxide (quicklime) to water and putting it into a digester for reaction, releasing a large amount of heat to generate calcium hydroxide (lime milk). During the quicklime digestion process, a certain amount of hot water at 80 degrees is injected. When the temperature inside the digester reaches 90 degrees, it is replaced with cold water and digestion continues.

[0003] After searching, the Chinese patent application number 202021488591.9 discloses a calcium oxide waste heat recovery and recycling device, including a digester and a dust collector connected to its side, the dust collector exhaust port is connected to the shell inlet of the tubular heat exchanger through a connecting pipe, the shell outlet of the tubular heat exchanger is connected with an air outlet pipe, the tube inlet of the tubular heat exchanger is connected with a cold water pipe, the tube outlet of the tubular heat exchanger is connected and fixed to a uniform distribution box arranged on the top of the digester through a hot water pipe, and an equalizer is arranged in the uniform distribution box, which is composed of a plurality of U-shaped plates arranged in steps from the center of the uniform distribution box to both sides, and a plurality of falling holes are opened on the U-shaped plate; a drive motor is arranged on the side of the digester, and the main shaft of the drive motor is connected and fixed to a stirring shaft arranged in the digester; an axial flow fan is installed on the air outlet pipe; and the hot water pipe outlet is directly opposite to the center of the equalizer.

[0004] The above patent has the following shortcomings: the device utilizes the steam discharged from the digestion dust collector to enter the tubular heat exchanger for heat exchange, and heats the reaction water entering the digester, which can not only recover and recycle the waste heat, but also enhance the reaction in the digester and reduce the energy consumption of digestion and stirring; however, the tubular heat exchanger has a relatively slow heating speed for the reaction water. Although the waste heat of the reaction can be recovered and utilized, the temperature of the reaction water in the digester is required to be 80 degrees, and in the mass production process of calcium hydroxide, the demand for reaction water is large, and the heating temperature of the reaction water by steam heat exchange is low, which is insufficient to meet the temperature requirements of the reaction water. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a waste heat recovery and reuse device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A waste heat recovery and reuse device comprises: a heat recovery outer cylinder and a digestion inner cylinder, wherein the digestion inner cylinder is fixedly installed inside the heat recovery outer cylinder, and an inner cylinder cover is fixedly installed on the top of the digestion inner cylinder; a water bath conduit is fixedly connected to the bottom of the outer wall of one side of the heat recovery outer cylinder, a three-way valve 2 is fixedly installed on one end of the water bath conduit, a water inlet conduit is fixedly installed on one water outlet of the three-way valve 2, a three-way valve 1 is fixedly installed on one end of the water inlet conduit, and a water supply pump 1 is fixedly installed on the water inlet of the three-way valve 1; an overflow pipe is fixedly connected to the top of the outer wall on the other side of the heat recovery outer cylinder, a three-way valve 3 is fixedly installed on one end of the overflow pipe, a heat-insulating water storage tank 2 is fixedly installed on one water outlet of the three-way valve 3, a water supply pump 2 is fixedly installed on the top of the heat-insulating water storage tank 2, a water inlet connecting pipe 2 is fixedly installed on the top of the water supply pump 2, and the water inlet connecting pipe 2 is fixedly connected to the inner cylinder cover.

[0008] As a further solution of the utility model: a plurality of heat dissipation fins are fixedly connected to the outer wall of the digestion inner cylinder at equal intervals, and a material outlet pipe is fixedly connected to the bottom end of the digestion inner cylinder, and the material outlet pipe passes through the heat recovery outer cylinder and extends downward.

[0009] As a further solution of the utility model: a cold water conduit and a hot water conduit are fixedly connected to both sides of the top end of the inner cylinder cover respectively, and a material conduit is arranged between the cold water conduit and the hot water conduit.

[0010] As a further solution of the utility model: a water inlet connecting pipe 1 is fixedly installed on the top end of the cold water conduit, and one end of the water inlet connecting pipe 1 is connected to a three-way valve 1.

[0011] As a further solution of the utility model: a purified water tank is fixedly installed at the bottom end of the water supply pump 1, and a plurality of water flow purifiers are fixedly installed at equal intervals inside the purified water tank.

[0012] As a further solution of the utility model: another water outlet of the three-way valve three is fixedly installed with an insulated water storage tank one, and a circulating water pump is fixedly installed at the bottom of the front side of the insulated water storage tank one.

[0013] As a further solution of the utility model: a circulation connecting pipe is fixedly installed at the water outlet of the circulation water pump, and one end of the circulation connecting pipe is connected to the other water inlet of the three-way valve 2.

[0014] As a further solution of the utility model: a connecting pipe is fixedly installed on one side of the top of the purified water tank, and a water pump is fixedly installed on one end of the connecting pipe.

[0015] Compared with the prior art, the utility model provides a waste heat recovery and reuse device, which has the following beneficial effects:

[0016] 1. The waste heat recovery and reuse device fully absorbs the heat generated during the quicklime digestion process through the water flow inside the heat recovery outer cylinder, and guides the heat-absorbing water flow into the digestion inner cylinder, thereby accelerating the digestion rate of quicklime, improving the production quality of calcium hydroxide, and fully recovering and reusing the waste heat generated by the quicklime digestion.

[0017] 2. The waste heat recovery and reuse device circulates the water inside the heat recovery outer cylinder through an insulated water tank and a circulating water pump, and cooperates with the heat dissipation fins to improve the heat absorption effect of the water flow, reduce the heat dissipation during the digestion process, and at the same time fully heat this part of the water flow to a suitable temperature.

[0018] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The utility model has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the overall assembly of the utility model;

[0020] Figure 2 It is a partial cross-sectional structural schematic diagram of the overall assembly of the utility model;

[0021] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0022] In the figure: 1. Heat recovery outer cylinder; 2. Digestion inner cylinder; 3. Inner cylinder cover; 4. Cold water conduit; 5. Material conduit; 6. Hot water conduit; 7. Water inlet connecting pipe 1; 8. Three-way valve 1; 9. Water supply pump 1; 10. Purification water tank; 11. Connecting pipeline; 12. Suction pump; 13. Suction pipe; 14. Water inlet conduit; 15. Three-way valve 2; 16. Water bath conduit; 17. Overflow pipe; 18. Three-way valve 3; 19. Insulated water tank 1; 20. Circulating water pump; 21. Circulating connecting pipe; 22. Insulated water tank 2; 23. Water supply pump 2; 24. Water inlet connecting pipe 2; 25. Support seat; 26. Water supply pipe 1; 27. Water flow purification body; 28. Water supply pipe 2; 29. ​​Heat dissipation fins; 30. Material outlet pipe. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] A waste heat recovery and reuse device, such as Figures 1 to 3As shown, it includes: a heat recovery outer cylinder 1 and a digestion inner cylinder 2, the digestion inner cylinder 2 is fixedly installed inside the heat recovery outer cylinder 1, and an inner cylinder cover 3 is fixedly installed on the top of the digestion inner cylinder 2; water and quicklime are introduced into the digestion inner cylinder 2 to digest the quicklime; a large amount of water flow is introduced into the heat recovery outer cylinder 1 to absorb the heat conducted through the digestion inner cylinder 2 during the quicklime digestion process.

[0025] The outer wall of the digestion inner tube 2 is welded with multiple heat dissipation fins 29 at equal intervals to accelerate the heat dissipation speed of the digestion inner tube 2; and the bottom end of the digestion inner tube 2 is integrally formed with a material outlet pipe 30, which passes through the heat recovery outer tube 1 and extends downward to export calcium hydroxide (lime milk); the bottom end of the heat recovery outer tube 1 is fixedly connected to a support ring seat, and the bottom end of the support ring seat is fixedly installed with a bearing seat 25.

[0026] A cold water conduit 4 and a hot water conduit 6 are integrally formed on both sides of the top of the inner cylinder cover 3, and a material conduit 5 is arranged between the cold water conduit 4 and the hot water conduit 6. The material conduit 5 is fixedly connected to the inner cylinder cover 3 to introduce quicklime (calcium oxide) into the interior of the digestion inner cylinder 2.

[0027] A water bath conduit 16 is welded to the bottom of the outer wall of one side of the heat recovery outer cylinder 1. A three-way valve 15 is fixedly installed at one end of the water bath conduit 16 away from the heat recovery outer cylinder 1. The three-way valve 15 is set with two water inlets and one water outlet. The water outlet introduces water flow into the water bath conduit 16.

[0028] A water inlet conduit 14 is fixedly installed at one water outlet of the three-way valve 2 15, and a three-way valve 8 is fixedly installed at one end of the water inlet conduit 14. The three-way valve 8 is set to have a water inlet and two water outlets. A water supply pump 9 is fixedly installed at the water inlet of the three-way valve 8, and a water inlet connecting pipe 7 is fixedly installed at the other water outlet of the three-way valve 8. One end of the water inlet connecting pipe 7 is fixedly installed at the top of the cold water conduit 4.

[0029] A purified water tank 10 is fixedly installed at the bottom end of the water supply pump 9, and multiple water flow purifiers 27 are fixedly installed at equal intervals inside the purified water tank 10. The multiple water flow purifiers 27 are respectively made of activated carbon and water-permeable films to fully filter impurities in the water flow.

[0030] A water supply pipe 26 is fixedly installed at the bottom end of the water supply pump 9, and the water supply pipe 26 extends into the interior of the purified water tank 10; a connecting pipe 11 is fixedly installed on one side of the top of the purified water tank 10 away from the water supply pump 9, and a water pump 12 is fixedly installed at one end of the connecting pipe 11. The water pump 12 is fixedly installed on the front of the purified water tank 10, and a water suction pipe 13 is fixedly installed at the water inlet of the water suction pump 12, and the water suction pipe 13 is connected to an external water supply device.

[0031] A backing plate 1 is fixedly mounted on the bottom ends of the purified water tank 10 and the water pump 12 , and the backing plate 1 is fixedly mounted on the top end of the bearing seat 25 .

[0032] An overflow pipe 17 is welded to the top of the outer wall on the other side of the heat recovery outer cylinder 1. A three-way valve 18 is fixedly installed at one end of the overflow pipe 17 away from the heat recovery outer cylinder 1. The three-way valve 18 is set to have one water inlet and two water outlets.

[0033] An outlet of the three-way valve 18 is fixedly installed with an insulated water tank 22, and a pad 2 is fixedly installed at the bottom end of the insulated water tank 22, and the pad 2 is fixedly installed on the top of the bearing seat 25; and a water supply pump 23 is fixedly installed at the top of the insulated water tank 22, and a water supply pipe 28 is fixedly installed at the bottom end of the water supply pump 23, and the water supply pipe 28 extends into the interior of the insulated water tank 22.

[0034] A water inlet connecting pipe 24 is fixedly installed on the top of the water supply pump 23, and one end of the water inlet connecting pipe 24 is fixedly connected to the hot water conduit 6, so as to inject hot water into the interior of the digestion inner tube 2 to accelerate the digestion reaction speed.

[0035] Another water outlet of the three-way valve 18 is fixedly installed with an insulated water tank 19, and the bottom end of the insulated water tank 19 is fixedly installed with a pad 3, and the pad 3 is fixedly installed on the top of the bearing seat 25; and a circulating water pump 20 is fixedly installed at the bottom of the front side of the insulated water tank 19.

[0036] A circulation connection pipe 21 is fixedly installed at the water outlet of the circulation water pump 20, and one end of the circulation connection pipe 21 is connected to another water inlet of the three-way valve 2 15, so as to facilitate the circulation of hot water whose temperature inside the heat recovery outer cylinder 1 does not meet the standard.

[0037] Note: The above-mentioned hot water conduit 6, water inlet connecting pipe 24, and circulation connecting pipe 21 are all protected by a thermal insulation layer.

[0038] Working principle:

[0039] Please refer to Figures 1 to 3 , assemble the device as shown in the figure;

[0040] When this device is in use;

[0041] Step 1: First, close the material outlet pipe 30, and introduce the material of the specified mass into the digestion inner tube 2 through the material conduit 5, and then close the material conduit 5; then start the water pump 12, extract the external water flow through the water pump 13, and introduce it into the purified water tank 10 through the connecting pipe 11. After the water flow is purified by the water flow purification body 27, it is extracted by the water supply pump 9 through the water supply pipe 26, and firstly injects water into the water inlet conduit 14 through the three-way valve 8, and the water flow enters the water bath conduit 16 through the three-way valve 2 15, and then enters the three-way valve 3 18 through the overflow pipe 17, and then enters the insulation water storage tank 19, until the insulation water storage tank 19 is filled with water, then the three-way valve 2 15 is used to close the water inlet connected to the water inlet conduit 14, and the water inlet connected to the circulation connecting pipe 21 is opened, and the circulation water pump 20 is turned on to make the water flow inside the insulation water storage tank 19 and the water flow inside the heat recovery outer tube 1 circulate;

[0042] Step 2: Then close the outlet connected to the water inlet conduit 14 of the three-way valve 8, open the outlet connected to the water inlet connecting pipe 7, and inject cold water into the interior of the digestion inner cylinder 2 to make the water flow and quicklime react with each other;

[0043] Step 3: The heat generated by the digestion of quicklime heats the water flow inside the heat recovery outer cylinder 1. When the water flow is heated to 80 degrees, the three-way valve 3 18 closes the water outlet connected to the insulation water tank 1 19, and opens the water outlet connected to the insulation water tank 2 22. The circulating water pump 20 introduces part of the high-temperature hot water into the insulation water tank 2 22 until the water flow inside the insulation water tank 1 19 is reduced to one-sixth of the capacity. The three-way valve 3 18 closes the water outlet connected to the insulation water tank 2 22, and opens the water outlet connected to the insulation water tank 1 19.

[0044] Step 4: Then open the three-way valve 15 synchronously, so that the two water inlets and one water outlet of the three-way valve 15 are opened synchronously, and the outlet connected to the water inlet conduit 14 of the three-way valve 18 is opened, and the outlet connected to the water inlet connecting pipe 17 is closed, until the inside of the heat preservation water storage tank 19 is filled with water again;

[0045] Step 5: Repeat steps 3 and 4 until the digestion reaction in the digestion inner tube 2 reaches a certain level, then start the water supply pump 23, which extracts some hot water from the inside of the heat preservation water storage tank 22 through the water supply pipe 28, and introduces it into the digestion inner tube 2 through the water inlet connecting pipe 24, so as to accelerate the digestion speed of quicklime;

[0046] Step 6: On the basis of step 5, when the temperature inside the digestion inner tube 2 reaches 90 degrees, the operation of step 2 is performed, and cold water is injected into the digestion inner tube 2 again to improve the production quality of calcium hydroxide (lime milk);

[0047] Step 7: The quicklime product (lime milk) after the digestion reaction is completed is discharged from the digestion inner cylinder 2 through the material outlet pipe 30;

[0048] After completing the above operations, lime milk is produced again according to steps 1, 5 (directly extracting hot water and introducing it into the digestion inner tube 2), 6 and 7. Steps 3 and 4 are automatically adjusted according to the heat generation effect during the quicklime digestion process.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A waste heat recovery and reuse device, characterized in that: include: A heat recovery outer cylinder (1) and a digestion inner cylinder (2), wherein the digestion inner cylinder (2) is fixedly installed inside the heat recovery outer cylinder (1), and an inner cylinder cover (3) is fixedly installed on the top of the digestion inner cylinder (2); a water bath conduit (16) is fixedly connected to the bottom of the outer wall of one side of the heat recovery outer cylinder (1), a three-way valve 2 (15) is fixedly installed on one end of the water bath conduit (16), a water outlet of the three-way valve 2 (15) is fixedly installed with a water inlet conduit (14), a three-way valve 1 (8) is fixedly installed on one end of the water inlet conduit (14), and the three-way valve 1 (8) is fixedly installed on one end of the three-way valve 1 (8) ) is fixedly installed with a water supply pump 1 (9) at the water inlet; an overflow pipe (17) is fixedly connected to the top of the outer wall on the other side of the heat recovery outer cylinder (1), a three-way valve 3 (18) is fixedly installed at one end of the overflow pipe (17), an insulated water tank 2 (22) is fixedly installed at one water outlet of the three-way valve 3 (18), a water supply pump 2 (23) is fixedly installed at the top of the insulated water tank 2 (22), a water supply pump 2 (23) is fixedly installed at the top of the water supply pump 2 (23), and a water inlet connecting pipe 2 (24) is fixedly connected to the inner cylinder cover (3).

2. The waste heat recovery and reuse device according to claim 1, characterized in that: The outer wall of the digestion inner cylinder (2) is fixedly connected with a plurality of heat dissipation fins (29) at equal intervals, and the bottom end of the digestion inner cylinder (2) is fixedly connected with a material outlet pipe (30), and the material outlet pipe (30) passes through the heat recovery outer cylinder (1) and extends downward.

3. The waste heat recovery and reuse device according to claim 1, characterized in that: A cold water conduit (4) and a hot water conduit (6) are respectively fixedly connected to both sides of the top end of the inner cylinder cover (3), and a material conduit (5) is arranged between the cold water conduit (4) and the hot water conduit (6).

4. The waste heat recovery and reuse device according to claim 3 is characterized in that: A water inlet connecting pipe (7) is fixedly installed at the top end of the cold water conduit (4), and one end of the water inlet connecting pipe (7) is connected to a three-way valve (8).

5. The waste heat recovery and reuse device according to claim 1, characterized in that: A purified water tank (10) is fixedly mounted at the bottom end of the water supply pump 1 (9), and a plurality of water flow purifiers (27) are fixedly mounted at equal intervals inside the purified water tank (10).

6. The waste heat recovery and reuse device according to claim 1, characterized in that: Another water outlet of the three-way valve three (18) is fixedly installed with a heat-insulating water storage tank one (19), and a circulating water pump (20) is fixedly installed at the bottom of the front side of the heat-insulating water storage tank one (19).

7. The waste heat recovery and reuse device according to claim 6, characterized in that: A circulation connection pipe (21) is fixedly installed at the water outlet of the circulation water pump (20), and one end of the circulation connection pipe (21) is connected to the other water inlet of the second three-way valve (15).

8. The waste heat recovery and reuse device according to claim 5, characterized in that: A connecting pipe (11) is fixedly installed on one side of the top of the purified water tank (10), and a water pump (12) is fixedly installed on one end of the connecting pipe (11).

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