Energy-saving and environment-friendly salt bath method based on quenching waste heat utilization

Abstract

The invention relates to the technical field of salt bath energy saving, in particular to a salt bath energy-saving and environment-friendly method based on quenching waste heat utilization. The method comprises the steps that S1, in the salt bath link, heat of a quenching salt bath rises due to the fact that a workpiece enters a quenching furnace; s2, the quenching salt tank enables strong brine in the brine separation device to be sharply evaporated due to temperature rise in a direct heat transfer mode; s3, water vapor generated by evaporation reaches a condenser through a heat preservation pipe, the water vapor is condensed into water flow in the condenser, the water flow flows back to the cleaning pool, and purified water in the cleaning pool is supplemented; s4, saturated strong brine in the cleaning pool is pumped back into the brine separation device through a water suction pump for brine separation, the whole brine separation scheme is established in the process of a heat treatment flow line, heat treatment is completed, needed brine separation is achieved, the quenching salt bath efficiency is guaranteed, and the efficiency of the whole heat treatment process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of salt bath energy conservation, and particularly relates to a salt bath energy-saving and environmental protection method based on the utilization of quenching waste heat. Background Art

[0002] In the heat treatment quenching heating link of bearing production, a large amount of waste heat is generated. Under the traditional heat treatment method, this waste heat is directly discharged, which not only causes environmental pollution but also exacerbates the trend of global warming. At the same time, since industrial salt is used as a medium for quenching, a problem of concentrated brine treatment occurs after the workpiece in the salt bath is cleaned. In view of the saturation of the solubility of industrial salt in water, pure water needs to be continuously replaced when cleaning the workpiece, and the traditional concentrated brine treatment process is extremely likely to cause secondary pollution. Now, a salt bath energy-saving and environmental protection method based on the utilization of quenching waste heat is proposed. Summary of the Invention

[0003] The purpose of the present invention is to solve the disadvantages existing in the background art, and to propose a salt bath energy-saving and environmental protection method based on the utilization of quenching waste heat.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a salt bath energy-saving and environmental protection method based on the utilization of quenching waste heat:

[0005] S1. In the salt bath link, the heat of the quenching salt bath will increase due to the entry of the workpiece into the quenching furnace;

[0006] S2. The quenching salt bath directly transfers heat to cause the concentrated brine in the brine separation device to evaporate rapidly due to the temperature rise;

[0007] S3. The water vapor generated by evaporation reaches the condenser through the heat preservation pipe, and the water vapor condenses into water flow in the condenser and flows back to the cleaning pool to supplement the pure water in the cleaning pool;

[0008] S4. The saturated concentrated brine in the cleaning pool is pumped back to the brine separation device by a water pump for brine separation;

[0009] The brine separation device includes a connection box fixedly embedded in the front surface of the quenching salt tank. The rear surface of the connection box is set as a heat-conducting surface. An inclined top is fixedly connected to the upper end of the connection box. A plurality of discharge channels are fixedly connected together by the inclined top and the upper front edge of the connection box. The inner bottom surface of the connection box is connected with a scraping block through a moving mechanism. An inclined surface is provided on the upper surface of the scraping block, and arc-shaped surfaces are respectively provided on both sides of the scraping block. Collection pipes are fixedly embedded at the lower sides of both sides of the connection box respectively. The rear ends of the collection pipes fixedly penetrate through the front surface of the quenching salt tank. The rear ends of the collection pipes are connected with a stuffing block through an elastic mechanism. A fan-shaped opening is provided on the outer surface of the collection pipe and inside the connection box, and the fan-shaped opening extends backward and communicates with the inside of the quenching salt tank. A protruding portion is provided on the outer surface of the stuffing block, and the protruding portion passes through the inner rear end of the fan-shaped opening. A spiral extrusion mechanism is provided inside the collection pipe.

[0010] Preferably, the moving mechanism includes a plurality of connecting rods fixedly connected to the upper surface of the scraping block. The upper ends of the plurality of connecting rods are fixedly connected together with a moving plate. An L-shaped plate is fixedly connected to one side surface of the moving plate. The L-shaped plate slidably penetrates through the side surface of the connection box. A servo transverse movement mechanism is provided at one end of the L-shaped plate located outside the connection box.

[0011] Preferably, the servo transverse movement mechanism includes a transverse cylinder provided on the upper surface of the inclined top. A connecting plate is fixedly connected to the telescopic end of the transverse cylinder. A transverse movement rod is fixedly connected together between the side surface of the connecting plate and the upper end of one side of the L-shaped plate. A plurality of reinforcing seats are fixedly sleeved on the outer surface of the transverse cylinder. The transverse movement rod slidably penetrates through the inside of the reinforcing seats.

[0012] Preferably, straight-in surfaces are provided at the rear ends of the outer surfaces of the stuffing block and the protruding portion, and converging surfaces are provided at the front ends of the outer surfaces of the stuffing block and the protruding portion.

[0013] Preferably, the elastic mechanism includes a plug rod fixedly connected to the upper end of the rear surface of the stuffing block. An installation column is fixedly connected to the rear surface of the connection box. A connection block is fixedly connected to the rear end of the lower surface of the installation column. A square groove is provided inside the connection block. A compression spring is provided inside the square groove. An anti-detachment edge is fixedly provided at the rear end of the upper surface of the plug rod. Both the plug rod and the anti-detachment edge are slidably matched with the inside of the square groove. The compression spring is located at the rear end of the plug rod.

[0014] Preferably, the spiral extrusion mechanism includes a rotating shaft rotatably penetrating through the inside of the collection pipe. A spiral blade is fixedly sleeved on the outer surface of the rotating shaft. The rotating shaft slidably penetrates through the inside of the stuffing block. A motor is fixedly installed at the front end of the collection pipe. The output shaft of the motor is fixedly connected to the front end of the rotating shaft.

[0015] Preferably, first connection pipes are fixedly embedded at the lower sides of both side surfaces of the quenching salt tank respectively. A second connection pipe is fixedly embedded at the upper end of one side surface of the connection box.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The entire brine separation solution of the present invention is established during the heat treatment process line. It not only completes the heat treatment but also realizes the required brine separation. The separation process of the concentrated brine can cool the industrial salt in the quenching salt bath, converting it from molten industrial salt to solid industrial salt, so as to ensure the efficiency of the quenching salt bath and improve the efficiency of the entire heat treatment process.

[0018] 2. Under the action of the heat-conducting surface on the connection box of the present invention, the brine in the connection box is promoted to evaporate. The water vapor is guided by the inclined top and enters the heat-insulating pipe after passing through the discharge channel, which has the effect of making full use of the waste heat in quenching and reducing energy consumption.

[0019] 3. The present invention controls the telescopic movement of the horizontal cylinder at regular intervals, so that the cross-moving rod and the L-shaped plate reciprocate horizontally, and then the scraping block reciprocates. The arc surface will push the salt crystals to scrape towards both sides. When the scraping block reaches one side and pauses, the salt crystals scraped at this time enter the inside of the collecting pipe through the fan-shaped opening. Through the operation of the motor, the rotating shaft and the spiral blade rotate. At the same time, the arc surface cooperates with the collecting pipe, so that the crystals are pushed and moved towards the rear along the inner wall. When the crystals reach the rear end, they will push the stuffing block. The inserting rod will squeeze the compression spring. After the pushed stuffing block is opened, the crystals are pushed back into the inside of the quenching salt bath, achieving the function of recycling and reducing consumables. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the schematic diagram of the principle of a salt bath energy-saving and environmental protection method based on the utilization of quenching waste heat of the present invention;

[0021] Figure 2 is the schematic diagram at the quenching salt bath of a salt bath energy-saving and environmental protection method based on the utilization of quenching waste heat of the present invention;

[0022] Figure 3 is the schematic diagram of the brine separation device of a salt bath energy-saving and environmental protection method based on the utilization of quenching waste heat of the present invention;

[0023] Figure 4 is the cross-sectional view at the connection box of a salt bath energy-saving and environmental protection method based on the utilization of quenching waste heat of the present invention;

[0024] Figure 5 is the schematic diagram at the collecting pipe of a salt bath energy-saving and environmental protection method based on the utilization of quenching waste heat of the present invention;

[0025] Figure 6 is a salt bath energy-saving and environmental protection method based on the utilization of quenching waste heat of the present invention Figure 5 enlarged view at A in;

[0026] Figure 7 Cross-sectional view of the elastic mechanism of an energy-saving and environmental protection method for salt bath based on quenching waste heat utilization according to the present invention;

[0027] Figure 8 Schematic diagram of the stuffing block of an energy-saving and environmental protection method for salt bath based on quenching waste heat utilization according to the present invention;

[0028] Figure 9 Another cross-sectional view of the connection box of an energy-saving and environmental protection method for salt bath based on quenching waste heat utilization according to the present invention.

[0029] In the figure: 1, quenching salt bath; 2, connection box; 3, heat conduction surface; 4, inclined top; 5, scraping block; 6, arc surface; 7, inclined surface; 8, connecting rod; 9, moving plate; 10, L-shaped plate; 11, transverse moving rod; 12, reinforcement seat; 13, transverse cylinder; 14, connecting plate; 15, discharge channel; 16, collecting pipe; 17, fan-shaped opening; 18, rotating shaft; 19, spiral blade; 20, motor; 21, stuffing block; 22, protruding part; 23, converging surface; 24, straight advancing surface; 25, inserting rod; 26, anti-detachment edge; 27, mounting column; 28, connecting block; 29, square groove; 30, compression spring; 31, first connecting pipe; 32, second connecting pipe; 33, quenching furnace; 34, heat preservation pipe; 35, condenser; 36, cleaning pool; 37, water pump; 38, brine separation device. Detailed implementation manners

[0030] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations.

[0031] As Figures 1-9 shown, an energy-saving and environmental protection method for salt bath based on quenching waste heat utilization:

[0032] S1. In the salt bath process, the heat of the quenching salt bath 1 will increase due to the entry of the workpiece into the quenching furnace 33;

[0033] S2. The quenching salt bath 1 directly transfers heat to cause the concentrated brine in the brine separation device 38 to evaporate rapidly due to the temperature rise;

[0034] S3. The water vapor generated by evaporation passes through the heat preservation pipe 34 to reach the condenser 35, and the water vapor condenses into water flow in the condenser 35 and flows back to the cleaning pool 36 to supplement the pure water in the cleaning pool 36;

[0035] S4. The saturated concentrated brine in the cleaning pool 36 is pumped back to the brine separation device 38 by the water pump 37 for brine separation;

[0036] The brine separation device 38 includes a connection box 2 fixedly embedded in the front surface of the quenching salt tank 1. The rear surface of the connection box 2 is set as a heat conducting surface 3. An inclined top 4 is fixedly connected to the upper end of the connection box 2. A plurality of discharge channels 15 are fixedly connected to the upper front edge of the connection box 2 and the inclined top 4 together. The inner bottom surface of the connection box 2 is connected with a scraping block 5 through a moving mechanism. An inclined surface 7 is formed on the upper surface of the scraping block 5. Arc surfaces 6 are respectively formed on both sides of the scraping block 5. Collection pipes 16 are fixedly embedded at the lower sides of both sides of the connection box 2. The rear ends of the collection pipes 16 fixedly penetrate through the front surface of the quenching salt tank 1. The rear ends of the collection pipes 16 are connected with a stuffing block 21 through an elastic mechanism. A fan-shaped opening 17 is formed on the outer surface of the collection pipe 16 and inside the connection box 2, and the fan-shaped opening 17 extends backward and communicates with the inside of the quenching salt tank 1. A protruding part 22 is arranged on the outer surface of the stuffing block 21, and the protruding part 22 passes through the inner rear end of the fan-shaped opening 17. A spiral extrusion mechanism is arranged inside the collection pipe 16.

[0037] The moving mechanism includes a plurality of connecting rods 8 fixedly connected to the upper surface of the scraping block 5. The upper ends of the plurality of connecting rods 8 are fixedly connected together with a moving plate 9. An L-shaped plate 10 is fixedly connected to one side surface of the moving plate 9. The L-shaped plate 10 slides through the side surface of the connection box 2. A servo cross-moving mechanism is arranged at the end of the L-shaped plate 10 located outside the connection box 2. The L-shaped plate 10 and other structures are controlled to move horizontally through the servo cross-moving mechanism.

[0038] The servo cross-moving mechanism includes a transverse cylinder 13 arranged on the upper surface of the inclined top 4. A connecting plate 14 is fixedly connected to the telescopic end of the transverse cylinder 13. A cross-moving rod 11 is fixedly connected between the side surface of the connecting plate 14 and the upper end of one side of the L-shaped plate 10. A plurality of reinforcing seats 12 are fixedly sleeved on the outer surface of the transverse cylinder 13. The cross-moving rod 11 slides through the inside of the reinforcing seats 12. The reinforcing seats 12 can enable the stable movement of the cross-moving rod 11 and improve the structural strength.

[0039] Straight-in surfaces 24 are formed at the rear ends of the outer surfaces of the stuffing block 21 and the protruding part 22. Converging surfaces 23 are formed at the front ends of the outer surfaces of the stuffing block 21 and the protruding part 22. The design of the converging surfaces 23 can play a role in guiding the crystal salt to be pushed and discharged. The straight-in surfaces 24 ensure that the stuffing block 21 is tightly inserted into the collection pipe 16 to ensure tightness when the salt crystals are not pushed out, and prevent liquid leakage.

[0040] The elastic mechanism includes a plug rod 25 fixedly connected to the upper end of the rear surface of the stuffing block 21. An installation column 27 is fixedly connected to the rear surface of the connection box 2. A connection block 28 is fixedly connected to the rear end of the lower surface of the installation column 27. A square groove 29 is formed inside the connection block 28. A compression spring 30 is arranged inside the square groove 29. An anti - detachment edge 26 is fixedly arranged at the rear end of the upper surface of the plug rod 25. Both the plug rod 25 and the anti - detachment edge 26 are slidably matched with the inside of the square groove 29. The compression spring 30 is located at the rear end of the plug rod 25. The anti - detachment edge 26 prevents the rear end of the plug rod 25 from detaching from the inside of the square groove 29.

[0041] The spiral extrusion mechanism includes a rotating shaft 18 rotatably penetrating through the inside of the collection pipe 16. A spiral blade 19 is fixedly sleeved on the outer surface of the rotating shaft 18. The rotating shaft 18 slidably passes through the inside of the stuffing block 21. A motor 20 is fixedly installed at the front end of the collection pipe 16. The output shaft of the motor 20 is fixedly connected to the front end of the rotating shaft 18. When the motor 20 operates, the rotating shaft 18 rotates, and then the spiral blade 19 rotates, pushing the crystal salts in the collection pipe 16 backward.

[0042] On the lower sides of the two side surfaces of the quenching salt tank 1, first connection pipes 31 are respectively fixedly embedded. On the upper end of one side surface of the connection box 2, a second connection pipe 32 is fixedly embedded. The two first connection pipes 31 on both sides are respectively connected to the liquid supply and drainage pipelines. The second connection pipe 32 is connected to the outlet pipeline of the water pump 37.

[0043] The entire brine separation solution of the present invention is established during the heat treatment process line. It not only completes the heat treatment but also realizes the required brine separation. The separation process of the concentrated brine can cool the industrial salt in the quenching salt tank 1, converting it from molten industrial salt to solid industrial salt to ensure the efficiency of the quenching salt bath and improve the efficiency of the entire heat treatment process.

[0044] Under the action of the heat - conducting surface 3 on the connection box 2, the brine inside the connection box 2 is promoted to evaporate. The water vapor is guided by the inclined top 4 and enters the heat - preservation pipe 34 after passing through the discharge channel 15, which has the effect of making full use of the waste heat during quenching and reducing energy consumption.

[0045] During use, the discharge pipeline of the water pump 37 is connected to the port of the second connection pipe 32. The two first connection pipes 31 are respectively used to dock the drainage pipeline and the liquid inlet pipeline. The front port of the discharge channel 15 is connected to the heat - preservation pipe 34.

[0046] By controlling the telescopic movement of the horizontal cylinder 13 at regular intervals, the transverse rod 11 and the L-shaped plate 10 reciprocate horizontally, and then the scraping block 5 reciprocates. The arc surface 6 will push the salt crystals to scrape towards both sides. When the scraping block 5 reaches one side and pauses, the salt crystals scraped will enter the inside of the collecting pipe 16 through the fan-shaped opening 17. By operating the motor 20, the rotating shaft 18 and the spiral blade 19 rotate. At the same time, the arc surface 6 cooperates with the collecting pipe 16, so that the crystals are pushed and moved towards the rear along the inner wall. When the crystals reach the rear end, they will push the stuffing block 21, and the insertion rod 25 will compress the compression spring 30. After the pushed stuffing block 21 is opened, the crystals are pushed back into the inside of the quenching salt tank 1 to achieve the function of recycling and reduce consumables.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A salt bath energy-saving and environmentally friendly method based on quenching waste heat utilization, characterized in that: S1. In the salt bath process, the heat of the quenching salt tank (1) increases due to the entry of the workpiece into the quenching furnace (33); S2, the quenching salt tank (1) causes the concentrated brine in the brine separation device (38) to evaporate rapidly due to the increase in temperature by direct heat transfer; S3, the water vapor generated by evaporation passes through the insulation pipe (34) to reach the condenser (35), the water vapor is condensed into water flow in the condenser (35), and flows back to the cleaning pool (36) to replenish the pure water in the cleaning pool (36); S4, pumping the saturated concentrated brine in the cleaning tank (36) back to the brine separation device (38) through the pump (37) for brine separation; The brine separation device (38) comprises a connection box (2), the connection box (2) being fixedly embedded in the front surface of the quenching salt tank (1), the rear surface of the connection box (2) being arranged as a heat conducting surface (3), the upper end of the connection box (2) being fixedly connected with an inclined top (4), the inclined top (4) and the upper front side of the connection box (2) being fixedly connected with a plurality of discharge channels (15), the inner bottom surface of the connection box (2) being connected with a scraper block (5) via a moving mechanism, the upper surface of the scraper block (5) being provided with an inclined surface (7), the two sides of the scraper block (5) being provided with arcuate surfaces (6), the lower sides of the connection box (2) being provided with curved surfaces (7), and the lower sides of the connection box (2) being provided with curved surfaces (6). A collecting pipe (16) is fixedly embedded at each of the two connecting boxes (2), the rear end of the collecting pipe (16) is fixedly passed through the front surface of the quenching salt tank (1), the rear end of the collecting pipe (16) is connected to a stuffing block (21) via an elastic mechanism, a fan-shaped opening (17) is provided on the outer surface of the collecting pipe (16) and located on the inner side of the connecting box (2), and the fan-shaped opening (17) extends rearward and is connected to the inner side of the quenching salt tank (1), a protrusion (22) is provided on the outer surface of the stuffing block (21), and the protrusion (22) passes through the inner rear end of the fan-shaped opening (17), and a spiral pushing mechanism is provided on the inner side of the collecting pipe (16).

2. The salt bath energy-saving and environmental protection method based on quenching waste heat utilization according to claim 1 is characterized in that: The moving mechanism comprises a plurality of connecting rods (8) fixedly connected to the upper surface of the scraper block (5), the upper ends of the plurality of connecting rods (8) being fixedly connected to a moving plate (9), a side surface of the moving plate (9) being fixedly connected to an L-shaped plate (10), the L-shaped plate (10) slidingly passing through the side surface of the connecting box (2), and a servo transverse movement mechanism being arranged at one end of the L-shaped plate (10) located outside the connecting box (2).

3. The salt bath energy-saving and environmental protection method based on quenching waste heat utilization according to claim 2 is characterized in that: The servo transverse movement mechanism comprises a transverse cylinder (13) arranged on the upper surface of the inclined top (4), the telescopic end of the transverse cylinder (13) is fixedly connected to a connecting plate (14), a transverse rod (11) is fixedly connected between the side surface of the connecting plate (14) and the upper end of one side of the L-shaped plate (10), a plurality of reinforcement seats (12) are fixedly sleeved on the outer surface of the transverse cylinder (13), and the transverse rod (11) slides through the inner side of the reinforcement seat (12).

4. The salt bath energy-saving and environmental protection method based on quenching waste heat utilization according to claim 1 is characterized in that: A straight-in surface (24) is provided at the rear end of the outer surface of the stuffing block (21) and the protruding portion (22), and a retracting surface (23) is provided at the front end of the outer surface of the stuffing block (21) and the protruding portion (22).

5. The salt bath energy-saving and environmental protection method based on quenching waste heat utilization according to claim 1 is characterized in that: The elastic mechanism comprises an insertion rod (25) fixedly connected to the upper end of the rear surface of the filling block (21); a mounting column (27) is fixedly connected to the rear surface of the connection box (2); a connection block (28) is fixedly connected to the rear end of the lower surface of the mounting column (27); a square groove (29) is provided on the inner side of the connection block (28); a compression spring (30) is provided on the inner side of the square groove (29); an anti-slip edge (26) is fixedly provided on the rear end of the upper surface of the insertion rod (25); the insertion rod (25) and the anti-slip edge (26) are both slidably matched with the inner side of the square groove (29); and the compression spring (30) is located at the rear end of the insertion rod (25).

6. The salt bath energy-saving and environmental protection method based on quenching waste heat utilization according to claim 1 is characterized in that: The spiral pushing mechanism comprises a rotating shaft (18) which rotates and passes through the inner side of the collecting tube (16); a spiral sheet (19) is fixedly sleeved on the outer surface of the rotating shaft (18); the rotating shaft (18) slides through the inner side of the stuffing block (21); a motor (20) is fixedly mounted on the front end of the collecting tube (16); and an output shaft of the motor (20) is fixedly connected to the front end of the rotating shaft (18).

7. The salt bath energy-saving and environmental protection method based on quenching waste heat utilization according to claim 1 is characterized in that: First connecting pipes (31) are fixedly embedded at the lower edges of both side surfaces of the quenching salt tank (1), and a second connecting pipe (32) is fixedly embedded at the upper edge of one side surface of the connection box (2).

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