Energy-saving steam boiler for potato blanching processing

Abstract

The utility model discloses an energy-saving steam boiler for hot bleaching processing of potatoes. The energy-saving steam boiler comprises a steam boiler body, a mechanical dust remover connected with a flue outlet of the body, heat exchange equipment connected with an air outlet of the mechanical dust remover, and starch drying equipment connected with a tube bundle outlet of the heat exchange equipment, the starch drying equipment comprises a heat exchange container connected with the heat exchange equipment, a bracket for supporting the heat exchange container, and a discharging device arranged on the bracket. A two-stage waste heat recovery technology is adopted, the first stage is heat exchange equipment, and the heat exchange equipment recovers first wave flue gas waste heat to be used for preheating boiler water or air entering a boiler; the second stage is starch drying equipment, the temperature of the flue gas is reduced after the flue gas passes through heat exchange equipment, and the residual temperature is used for drying moisture of starch, so that the starch is easy to store.

Description

Technical Field

[0001] The utility model relates to the field of waste heat recovery equipment, in particular to an energy-saving steam boiler used in potato blanching processing. Background Art

[0002] In the process of blanching and potato processing, the waste heat generated by the steam boiler is often only used for preheating boiler water and air. This waste heat recovery method greatly limits the effective use of energy. Specifically, the existing heat exchange system has a low recovery rate for steam boiler waste heat, and a large amount of valuable heat energy has not been fully utilized, resulting in energy waste.

[0003] At the same time, a large amount of starch is produced during the blanching and potato processing, which needs to be dried in the subsequent processing to be preserved. However, traditional drying methods often rely on external heat sources, which not only increases energy consumption but also increases production costs.

[0004] Therefore, how to efficiently utilize the waste heat of steam boilers and apply it to the drying process of starch to improve energy utilization efficiency and reduce production costs has become a problem that needs to be solved urgently. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an energy-saving steam boiler for potato blanching processing, which solves the problem of how to efficiently utilize the waste heat of the steam boiler and apply it to the drying process of starch to improve energy utilization efficiency and reduce production costs.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: an energy-saving steam boiler used for potato blanching processing, comprising: a steam boiler body, a mechanical dust collector connected to the flue outlet of the body, a heat exchange device connected to the air outlet of the mechanical dust collector, and a starch drying device connected to the tube bundle outlet of the heat exchange device; the starch drying device comprises: a heat exchange container connected to the heat exchange device, a bracket supporting the heat exchange container, and a discharge device arranged on the bracket.

[0007] Preferably, the heat exchange container includes: an inner tank with an opening at the upper end, an outer shell sleeved outside the inner tank, an air inlet provided on the outer shell and rotatably connected to the tube bundle outlet, an air outlet provided on the outer shell and rotatably connected to the exhaust gas discharge end, and a stirring mechanism provided at the opening of the inner tank; a sealed gap is provided between the inner tank and the outer shell.

[0008] Preferably, the stirring mechanism includes: a crossbeam provided at the opening of the inner container, a servo motor provided on the crossbeam and equipped with a reducer, a stirring shaft connected to the servo motor, and a stirring paddle provided at the lower end of the stirring shaft.

[0009] Preferably, the contour of the stirring paddle fits the inner bottom surface of the inner container.

[0010] Preferably, the air inlet and the air outlet are located in the same horizontal plane and are symmetrically arranged on both sides of the shell, and two vertical support rods are provided on the bracket, and bearings are provided on the top of the support rods, and the two bearings are respectively mounted on the air inlet and the air outlet.

[0011] Preferably, the unloading device includes an electric push rod arranged on the bracket, a lever fixedly connected to the air inlet or the air outlet, and a ring slidably mounted on the lever; the ring is hinged to the piston rod of the electric push rod.

[0012] Preferably, the mechanical dust collector is a cyclone dust collector.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The energy-saving steam boiler used in the potato blanching process of the utility model adopts a two-stage waste heat recovery technology. The first stage is a heat exchange device, which recovers the first wave of flue gas waste heat to preheat boiler water or air entering the boiler; the second stage is a starch drying device. The temperature of the flue gas is reduced after passing through the heat exchange device, and the remaining temperature is used to dry the moisture of the starch, making the starch easy to preserve, solving the problem of needing to add an additional heat source to dry the starch, improving the resource utilization rate of potato manufacturers and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of an energy-saving steam boiler used for potato blanching;

[0016] Figure 2 It is a structural schematic diagram of starch drying equipment;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of starch drying equipment.

[0018] In the figure: main body 1, mechanical dust collector 2, bracket 3, heat exchange equipment 4, starch drying equipment 5, liner 6, shell 7, air inlet 8, exhaust gas discharge end 9, air outlet 10, sealing gap 11, crossbeam 12, servo motor 13, stirring shaft 14, stirring paddle 15, support rod 16, bearing 17, electric push rod 18, lever 19, collar 20. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figures 1 to 3 This embodiment provides an energy-saving steam boiler for potato blanching, comprising: a steam boiler body 1, a mechanical dust collector 2 connected to the flue outlet of the body 1, a heat exchange device 4 connected to the air outlet of the mechanical dust collector 2, and a starch drying device 5 connected to the tube bundle outlet of the heat exchange device 4; the starch drying device 5 comprises: a heat exchange container connected to the heat exchange device 4, a bracket 3 supporting the heat exchange container, and a discharge device arranged on the bracket 3. The utility model adopts a two-stage waste heat recovery technology, the first stage is the heat exchange device 4, the heat exchange device 4 will recover the first wave of flue gas waste heat to preheat boiler water or air entering the boiler; the second stage is the starch drying device 5, the flue gas temperature is reduced after passing through the heat exchange device 4, and the remaining temperature is used to dry the moisture of the starch, so that the starch is easy to preserve.

[0021] The heat exchange container comprises: an inner tank 6 with an opening at the upper end, an outer shell 7 sleeved on the inner tank 6, an air inlet 8 provided on the outer shell 7 and rotatably connected to the outlet of the tube bundle, an air outlet 10 provided on the upper part of the outer shell 7 and rotatably connected to the exhaust gas discharge end 9, and a stirring mechanism provided at the opening of the inner tank 6; a sealed gap 11 is provided between the inner tank 6 and the outer shell 7. The flue gas from the heat exchange device flows from the air inlet 8 to the sealed gap 11, and the starch placed in the inner tank 6 is heated by the residual heat of the flue gas to gradually dry the moisture. The inner tank 6 is made of heat-conducting material, and the outer shell 7 is made of heat-insulating material.

[0022] In this embodiment, the heat exchange container is used to dry potato starch, so the temperature of the flue gas coming out of the heat exchange device 4 is not higher than the gelatinization temperature of potato starch, that is, 58°C.

[0023] The stirring mechanism includes: a crossbeam 12 disposed at the opening of the inner container 6, a servo motor 13 disposed on the crossbeam 12 and equipped with a reducer, a stirring shaft 14 connected to the servo motor 13, and a stirring paddle 15 disposed at the lower end of the stirring shaft 14. The servo motor 13 drives the stirring shaft 14 and the stirring paddle 15 to turn the starch, thereby improving the efficiency and uniformity of drying and also preventing the starch from becoming hardened.

[0024] The contour of the stirring paddle 15 fits the inner bottom surface of the inner pot 6. The stirring paddle 15 fits the inner bottom surface of the inner pot 6 to prevent starch from sticking to the inner wall of the inner pot 6 and gelatinizing during a long heating process.

[0025] The air inlet 8 and the air outlet 10 are located in the same horizontal plane and are symmetrically arranged on both sides of the housing 7. Two vertical support rods 16 are arranged on the bracket 3. A bearing 17 is arranged on the top of the support rod 16. The two bearings 17 are respectively sleeved on the air inlet 8 and the air outlet 10. The air inlet 8 is connected to the tube bundle outlet by a rotary seal connection, and the air outlet 10 is also connected to the exhaust gas discharge end 9 by a rotary seal connection.

[0026] The unloading device includes an electric push rod 18 disposed on the bracket 3, a lever 19 fixedly connected to the air inlet 8 or the air outlet 10, and a collar 20 slidably sleeved on the lever 19; the collar 20 is hinged to the piston rod of the electric push rod 18. The piston rod of the electric push rod 18 pushes the collar 20 upward, and the collar 20 changes the angle of the lever 19, thereby tilting the angle of the heat exchange container, so that the dried starch can be poured out from the inner container 6.

[0027] The mechanical dust collector 2 is a cyclone dust collector. In this embodiment, the mechanical dust collector 2 is not limited to the cyclone type, and the inertial type and the bag type can be used. In addition, the electrostatic precipitator, the wet type, the filtering type, and the adapted dust collector can also be used here.

[0028] When the energy-saving steam boiler used for potato blanching processing of the utility model is used: the high-temperature flue gas generated by the combustion system of the steam boiler enters the mechanical dust collector 2 along the flue to remove large particle impurities, and then the flue gas outlet enters the heat exchange device 4. The heat exchange device 4 uses the flue gas waste heat boiler water or the air entering the boiler, and reduces the temperature of the discharged flue gas to below 58°C. The flue gas at this temperature enters the heat exchange container to dry the starch in the inner tank 6, and then the flue gas is discharged to high altitude from the exhaust gas discharge end 9. After the starch is dried, the operator starts the electric push rod 18 to tilt the heat exchange container to pour out the dried starch, and finally adds the starch to be dried into the inner tank 6.

[0029] 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. An energy-saving steam boiler for potato blanching, characterized in that: include: A steam boiler body (1), a mechanical dust collector (2) connected to the flue outlet of the body (1), a heat exchange device (4) connected to the air outlet of the mechanical dust collector (2), and a starch drying device (5) connected to the tube bundle outlet of the heat exchange device (4); the starch drying device (5) comprises: a heat exchange container connected to the heat exchange device (4), a bracket (3) supporting the heat exchange container, and a discharge device arranged on the bracket (3).

2. The energy-saving steam boiler for potato blanching according to claim 1, characterized in that: The heat exchange container comprises: an inner container (6) with an opening at the upper end, an outer shell (7) sleeved outside the inner container (6), an air inlet (8) provided on the outer shell (7) and rotatably connected to the outlet of the tube bundle, an air outlet (10) provided on the upper side of the outer shell (7) and rotatably connected to the exhaust gas discharge end (9), and a stirring mechanism provided at the opening of the inner container (6); a sealing gap (11) is provided between the inner container (6) and the outer shell (7).

3. The energy-saving steam boiler for potato blanching according to claim 2, characterized in that: The stirring mechanism comprises: a crossbeam (12) arranged at the opening of the inner container (6), a servo motor (13) arranged on the crossbeam (12) and equipped with a reducer, a stirring shaft (14) connected to the servo motor (13), and a stirring paddle (15) arranged at the lower end of the stirring shaft (14).

4. The energy-saving steam boiler for potato blanching according to claim 3, characterized in that: The contour of the stirring paddle (15) fits the inner bottom surface of the inner container (6).

5. The energy-saving steam boiler for potato blanching according to claim 2, characterized in that: The air inlet (8) and the air outlet (10) are located in the same horizontal plane and are symmetrically arranged on both sides of the housing (7); the bracket (3) is provided with two vertical support rods (16); the tops of the support rods (16) are provided with bearings (17); the two bearings (17) are respectively sleeved on the air inlet (8) and the air outlet (10).

6. The energy-saving steam boiler for potato blanching according to claim 5, characterized in that: The unloading device comprises an electric push rod (18) arranged on the bracket (3), a lever (19) fixedly connected to the air inlet (8) or the air outlet (10), and a collar (20) slidably mounted on the lever (19); the collar (20) is hinged to the piston rod of the electric push rod (18).

7. The energy-saving steam boiler for potato blanching according to claim 1, characterized in that: The mechanical dust collector (2) is a cyclone dust collector.

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