Wastewater evaporator for potato starch preparation

Abstract

The utility model discloses a waste water evaporator for potato starch preparation, which comprises a first-effect evaporator, a second-effect evaporator and a preheating box, the first-effect evaporator and the second-effect evaporator are both connected with a steam source through a heating coil for heating, steam generated by the first-effect evaporator is conveyed into the heating coil of the second-effect evaporator, and steam generated by the preheating box is conveyed into the heating coil of the second-effect evaporator. Steam generated by the second-effect evaporator is conveyed into the preheating box, the first-effect evaporator and the second-effect evaporator are each provided with a feeding pipe and a discharging pipe in a matched mode, a liquid conveying pipe is arranged between the discharging pipe at the bottom of the first-effect evaporator and the feeding pipe on the side wall of the second-effect evaporator, and a liquid inlet pipe and a liquid outlet pipe are arranged on the preheating box. The liquid outlet pipe is connected with a liquid inlet pipe on the first-effect evaporator, a rotating shaft, a scraping plate, a stirring blade group and a motor are arranged in each of the first-effect evaporator and the second-effect evaporator in a matched mode, the waste water evaporation effect in the potato starch preparation process can be improved, and meanwhile adhesion of the inner wall is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater evaporators, and more specifically, to a wastewater evaporator for preparing potato starch. Background Art

[0002] The potato starch production process generates a large amount of high-concentration organic wastewater, which mainly comes from potato washing, crushing, starch separation and washing. The characteristics of the wastewater include high organic content, high suspended matter, low pH value, good biodegradability and high ammonia nitrogen content. If it is discharged directly without treatment, it will cause serious pollution to the environment and waste precious water resources.

[0003] After pretreatment, these wastewaters need to be evaporated to remove the water therein, and the concentrated liquid organic fertilizer formed after evaporation is collected and sent to the organic fertilizer storage tank after overflowing from the bottom, and used as fertilizer, thus improving the utilization rate of materials;

[0004] However, in the prior art, when the wastewater for preparing potato starch is evaporated, impurities in the wastewater are easily precipitated and adhered to the inner wall of the evaporator, causing sticky corrosion of the inner wall of the evaporator, etc.;

[0005] In addition, when the existing wastewater evaporator for potato starch preparation realizes the evaporation treatment of potato starch preparation wastewater, the wastewater is mostly directly transported to the inside of the evaporator, and the wastewater cannot be preheated in advance, resulting in more energy and longer time required to heat the wastewater in the evaporator, affecting the evaporation efficiency of the wastewater. At the same time, when the existing potato starch preparation wastewater is evaporated, the steam generated is mostly directly discharged or directly contacted with the heat exchanger for utilization, and the utilization effect is poor. Utility Model Content

[0006] In view of the problems existing in the prior art, the utility model provides a wastewater evaporator for potato starch preparation to solve the technical problems mentioned in the background technology that the wastewater evaporator for potato starch preparation in the prior art is prone to precipitation and impurities adhere to the inner wall during the evaporation of potato starch preparation wastewater, which affects the service life of the equipment and has low energy utilization efficiency.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A wastewater evaporator for preparing potato starch, comprising a first-effect evaporator, a second-effect evaporator and a preheating box, wherein the side walls of the first-effect evaporator and the second-effect evaporator are both provided with heating coils, the heating coils on the first-effect evaporator are connected to a steam source, the steam generated by the first-effect evaporator is transported to the inside of the heating coils of the second-effect steam, the steam generated by the second-effect evaporator is transported to the preheating box, the first-effect evaporator and the second-effect evaporator are both provided with a feed pipe and a discharge pipe, and the bottom of the first-effect evaporator is connected to a steam source, and the steam generated by the first-effect evaporator is transported to the inside of the heating coils of the second-effect steam, and the steam generated by the second-effect evaporator is transported to the preheating box. A liquid infusion pipe is arranged between the discharge pipe and the feed pipe on the side wall of the second-effect evaporator, a liquid inlet pipe and a liquid outlet pipe are arranged on the preheating box, the liquid outlet pipe is connected with the liquid inlet pipe on the first-effect evaporator, a rotating shaft is rotatably installed inside the first-effect evaporator and the second-effect evaporator through a bearing, a scraper is arranged on the rotating shaft to cooperate with the inner wall of the first-effect evaporator and the second-effect evaporator, and a stirring blade group is arranged on the rotating shaft, and a motor is arranged on the top of the first-effect evaporator and the second-effect evaporator to cooperate with the rotating shaft.

[0009] The utility model is further configured that the top ends of the first-effect evaporator and the second-effect evaporator are both provided with steam exhaust pipes, a steam delivery pipe is provided between the heating coil of the second-effect evaporator and the steam exhaust pipe at the top of the first-effect evaporator, the steam in the first-effect evaporator and the second-effect evaporator is discharged through the steam exhaust pipe, the steam discharged from the first-effect evaporator is effectively transported to the heating coil in the second-effect evaporator through the steam delivery pipe, and is used for heating inside the second-effect evaporator.

[0010] The utility model is further configured as follows: a preheating tube is arranged in a serpentine shape in the preheating box, the steam exhaust pipe on the second-effect evaporator is connected to the air inlet end of the preheating tube through a pipeline, the discharge end of the preheating tube extends to the outside of the preheating box to form a first condensed water discharge pipe, and the feed liquid entering the first-effect evaporator can be preheated through the preheating tube, thereby reducing the time required for heating the feed liquid in the first-effect evaporator and improving the efficiency of evaporation treatment of wastewater generated in the process of preparing potato starch.

[0011] The utility model is further configured to include a steam source pipe, on which branch pipes are provided respectively connected to the heating coil on the first-effect evaporator and the steam delivery pipe, and on which valves are provided. The steam source pipe is connected to an external steam source, wherein the supply of the steam source is respectively controlled by the branch pipe and the valve, and is mainly provided to the heating coil on the first-effect evaporator, and can provide assistance when the heat of the heating coil in the second-effect evaporator is insufficient.

[0012] The utility model is further configured such that the tail end of the heating coil extends to the outside of the first-effect evaporator and the second-effect evaporator respectively, and is formed with a second condensed water discharge pipe, through which the condensed water after heat exchange in the heating coil can be discharged.

[0013] The utility model is further configured such that the stirring blade group includes a first spiral blade, the first spiral blade is arranged on a rotating shaft, and a second spiral blade is arranged on the outer side in the opposite direction. Through the cooperation of the first spiral blade and the second spiral blade, uniform stirring of the wastewater during evaporation can be achieved, and precipitation of impurities in the wastewater can be prevented. At the same time, evaporation uniformity and evaporation efficiency are improved.

[0014] The utility model is further configured such that a connecting rod is provided on the rotating shaft, the scraper is provided at the tail end of the connecting rod, and the first spiral blade and the second spiral blade are both partially fixed on the connecting rod, and the scraper can be stably installed on the rotating shaft through the connecting rod.

[0015] The utility model is further configured such that a pump body is provided on the liquid infusion pipe, and a control valve is provided on the discharge pipe, wherein, through the action of the pump body, the liquid inside the first-effect evaporator can be smoothly transported to the inside of the second-effect evaporator, and at the same time, the opening and closing control of the discharge pipe can be controlled by the control valve.

[0016] Compared with the prior art, the utility model provides a wastewater evaporator for preparing potato starch, which has the following beneficial effects:

[0017] 1. The utility model transmits the steam generated in the first-effect evaporator to the heating coil in the second-effect evaporator, so that the steam generated in the first-effect evaporator can be used to heat the second-effect evaporator. At the same time, the utility model transmits the steam generated in the second-effect evaporator to the inside of the preheating box to preheat the wastewater generated in the potato preparation process to be evaporated before evaporation, thereby effectively improving the energy utilization rate and the energy-saving effect. At the same time, the utility model transmits the feed liquid that has been initially evaporated in the first-effect evaporator to the second-effect evaporator for further evaporation. In this way, different evaporations can be performed for different stages of the feed liquid, thereby improving the efficiency of wastewater treatment. The finished liquid after evaporation can be discharged outwardly through the discharge pipe at the bottom of the second-effect evaporator.

[0018] 2. In the utility model, by providing a preheating box, the feed liquid can be preheated before entering the first-effect evaporator, thereby reducing the heat consumption of the feed liquid in the first-effect evaporator, reducing the consumption of wastewater evaporation, and improving the evaporation efficiency of wastewater generated in the potato production and preparation process.

[0019] 3. The utility model is provided with a rotating shaft, a scraper and a stirring blade group that cooperate with each other inside the first-effect evaporator and the second-effect evaporator. In this way, during the evaporation of potato wastewater, the motor is started, and the rotating shaft can be controlled by the motor to drive the scraper and the stirring blade group to rotate, so that the inner wall of the first-effect evaporator is scraped by the scraper to avoid the situation that organic impurities such as starch in the potato wastewater adhere to the inner walls of the first-effect evaporator and the second-effect evaporator. At the same time, the stirring blade group can continuously stir the wastewater in the first-effect evaporator and the second-effect evaporator, thereby improving the heating uniformity of the wastewater and improving the evaporation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall structure of a wastewater evaporator for preparing potato starch in the utility model is shown in FIG. Figure 1 ;

[0021] Figure 2 The overall structure of a wastewater evaporator for preparing potato starch in the utility model is shown in FIG. Figure 2 ;

[0022] Figure 3 It is a cross-sectional schematic diagram of the matching structure between the first-effect evaporator and the second-effect evaporator in the utility model;

[0023] Figure 4 It is a schematic diagram of the connection structure between the rotating shaft, the scraper and the stirring blade group in the utility model;

[0024] Figure 5 It is a schematic cross-sectional view of the internal structure of the preheating box in the utility model.

[0025] In the figure: 1. first-effect evaporator; 2. second-effect evaporator; 3. preheating box; 4. heating coil; 5. feed pipe; 6. discharge pipe; 7. liquid infusion pipe; 8. liquid inlet pipe; 9. liquid outlet pipe; 10. rotating shaft; 11. scraper; 12. stirring blade group; 13. motor; 14. steam discharge pipe; 15. steam delivery pipe; 16. preheating pipe; 17. first condensate discharge pipe; 18. steam source pipe; 19. branch pipe; 20. valve; 21. second condensate discharge pipe; 22. first spiral blade; 23. second spiral blade; 24. connecting rod; 25. pump body; 26. control valve. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0028] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0029] See also Figure 1-Figure 5 A wastewater evaporator for preparing potato starch comprises a first-effect evaporator 1, a second-effect evaporator 2 and a preheating box 3. The side walls of the first-effect evaporator 1 and the second-effect evaporator 2 are both provided with heating coils 4. The heating coils 4 on the first-effect evaporator 1 are connected to a steam source. The steam generated by the first-effect evaporator 1 is transported to the inside of the heating coils 4 of the second-effect steam, and the steam generated by the second-effect evaporator 2 is transported to the preheating box 3.

[0030] The steam generated in the first-effect evaporator 1 can be used to heat the second-effect evaporator 2. At the same time, in the utility model, the steam generated in the second-effect evaporator 2 is transported to the inside of the preheating box 3 to preheat the wastewater generated in the potato preparation process to be evaporated before evaporation, thereby effectively improving the utilization rate of energy and improving the energy saving effect.

[0031] The utility model is equipped with a feed pipe 5 and a discharge pipe 6 on both the first-effect evaporator 1 and the second-effect evaporator 2. A liquid infusion pipe 7 is arranged between the discharge pipe 6 at the bottom of the first-effect evaporator 1 and the feed pipe 5 on the side wall of the second-effect evaporator 2. A liquid inlet pipe 8 and a liquid outlet pipe 9 are arranged on the preheating box 3. The liquid outlet pipe 9 is connected to the liquid inlet pipe 8 on the first-effect evaporator 1.

[0032] The utility model transports the feed liquid after preliminary evaporation in the first-effect evaporator 1 to the second-effect evaporator 2 for further evaporation, so that different evaporations can be performed according to different stages of the feed liquid, thereby improving the efficiency of wastewater treatment, and the finished liquid after evaporation treatment can be discharged outward through the discharge pipe 6 at the bottom of the second-effect evaporator 2;

[0033] The utility model has a rotating shaft 10 rotatably mounted inside the first-effect evaporator 1 and the second-effect evaporator 2 through a bearing, a scraper 11 is arranged on the rotating shaft 10 to match the inner wall of the first-effect evaporator 1 and the second-effect evaporator 2, and a stirring blade group 12 is arranged on the rotating shaft 10, and a motor 13 is arranged on the top of the first-effect evaporator 1 and the second-effect evaporator 2 to match the corresponding rotating shaft 10;

[0034] In this way, during the evaporation of potato wastewater, the motor 13 is started, and the motor 13 can control the rotating shaft 10 to drive the scraper 11 and the stirring blade group 12 to rotate, so that the inner wall of the first-effect evaporator 1 is scraped by the scraper 11 to prevent organic impurities such as starch in the potato wastewater from adhering to the inner walls of the first-effect evaporator 1 and the second-effect evaporator 2. At the same time, the stirring blade group 12 can continuously stir the wastewater in the first-effect evaporator 1 and the second-effect evaporator 2, thereby improving the heating uniformity of the wastewater and improving the evaporation effect.

[0035] See also Figure 1-Figure 5 As an implementation method of the first-effect evaporator 1 and the second-effect evaporator 2: a steam exhaust pipe 14 is provided at the top of the first-effect evaporator 1 and the second-effect evaporator 2, and a steam conveying pipe 15 is provided between the heating coil 4 of the second-effect evaporator 2 and the steam exhaust pipe 14 at the top of the first-effect evaporator 1. The steam in the first-effect evaporator 1 and the second-effect evaporator 2 is discharged through the steam exhaust pipe 14, and the steam discharged from the first-effect evaporator 1 is effectively transported to the heating coil 4 in the second-effect evaporator 2 through the steam gas transmission pipe for heating utilization inside the second-effect evaporator 2.

[0036] See also Figure 1-Figure 5 As an implementation method of the preheating box 3: a preheating tube 16 is arranged in a serpentine shape in the preheating box 3, the steam exhaust pipe 14 on the second-effect evaporator 2 is connected to the air inlet end of the preheating tube 16 through a pipeline, and the discharge end of the preheating tube 16 extends to the outside of the preheating box 3 to form a first condensed water discharge pipe 17. The preheating tube 16 can be used to preheat the feed liquid entering the first-effect evaporator 1, thereby reducing the time required for heating the feed liquid in the first-effect evaporator 1 and improving the efficiency of evaporation treatment of wastewater generated in the preparation process of potato starch.

[0037] See also Figure 1-Figure 5 As an implementation method of the wastewater evaporator: it also includes a steam source pipe 18, on which a branch pipe 19 is provided, which is respectively connected to the heating coil 4 on the first-effect evaporator 1 and the steam delivery pipe 15, and a valve 20 is provided on the branch pipe 19. The steam source pipe 18 is connected to an external steam source, wherein the supply of the steam source is controlled by the branch pipe 19 and the valve 20, respectively, and is mainly provided to the heating coil 4 on the first-effect evaporator 1. When the heat of the heating coil 4 in the second-effect evaporator 2 is insufficient, it can provide assistance.

[0038] See also Figure 1-Figure 5 As an implementation method of the heating coil 4: the tail ends of the heating coil 4 extend to the outside of the first-effect evaporator 1 and the second-effect evaporator 2 respectively, and are formed with a second condensed water discharge pipe 21. The condensed water after heat exchange in the heating coil 4 can be discharged through the second condensed water discharge pipe, and the second condensed water discharge pipe 21 can be connected to an external condensed water collection device.

[0039] See also Figure 1-Figure 5 As an implementation of the stirring blade group 12: the stirring blade group 12 includes a first spiral blade 22, the first spiral blade 22 is arranged on the rotating shaft 10, and a second spiral blade 23 is arranged on the outer side in the opposite direction. Through the cooperation of the first spiral blade 22 and the second spiral blade 23, uniform stirring of the wastewater during evaporation can be achieved to prevent impurities in the wastewater from precipitating, and at the same time, improve evaporation uniformity and evaporation efficiency.

[0040] See also Figure 1-Figure 5 , as an implementation mode of the rotating shaft 10: a connecting rod 24 is provided on the rotating shaft 10, the scraper 11 is provided at the tail end of the connecting rod 24, and the first spiral blade 22 and the second spiral blade 23 are partially fixed on the connecting rod 24, and the scraper 11 can be stably installed on the rotating shaft 10 through the connecting rod 24.

[0041] See also Figure 1-Figure 5 As an implementation of the infusion pipe 7: a pump body 25 is provided on the infusion pipe 7, and a control valve 26 is provided on the discharge pipe 6, wherein, through the action of the pump body 25, the liquid inside the first-effect evaporator 1 can be smoothly transported to the inside of the second-effect evaporator 2, and at the same time, the opening and closing control of the discharge pipe 6 can be controlled by the control valve 26.

[0042] In summary:

[0043] The utility model transmits the steam generated in the first-effect evaporator 1 to the heating coil 4 in the second-effect evaporator 2, so that the steam generated in the first-effect evaporator 1 can be used to heat the second-effect evaporator 2. At the same time, the utility model transmits the steam generated in the second-effect evaporator 2 to the inside of the preheating box 3, and preheats the wastewater generated in the potato preparation process to be evaporated before evaporation, thereby effectively improving the utilization rate of energy and improving the energy saving effect;

[0044] At the same time, the utility model transports the feed liquid that has been initially evaporated in the first-effect evaporator 1 to the second-effect evaporator 2 for further evaporation. In this way, different evaporations can be performed according to different stages of the feed liquid, thereby improving the efficiency of wastewater treatment. The finished liquid after evaporation treatment can be discharged outwardly through the discharge pipe 6 at the bottom of the second-effect evaporator 2.

[0045] In the utility model, by providing a preheating box 3, the feed liquid before entering the first-effect evaporator 1 can be preheated, thereby reducing the heat consumption of the feed liquid in the first-effect evaporator 1, reducing the consumption of wastewater evaporation, and improving the evaporation efficiency of wastewater generated in the potato production and preparation process;

[0046] The utility model is provided with a rotating shaft 10, a scraper 11 and a stirring blade group 12 which cooperate with each other inside the first-effect evaporator 1 and the second-effect evaporator 2. In this way, during the evaporation of potato wastewater, the motor 13 is started, and the motor 13 can control the rotating shaft 10 to drive the scraper 11 and the stirring blade group 12 to rotate, so that the inner wall of the first-effect evaporator 1 is scraped by the scraper 11, so that the organic impurities such as starch in the potato wastewater are prevented from adhering to the inner walls of the first-effect evaporator 1 and the second-effect evaporator 2. At the same time, the stirring blade group 12 can continuously stir the wastewater in the first-effect evaporator 1 and the second-effect evaporator 2, so as to improve the heating uniformity of the wastewater and improve the evaporation effect.

[0047] In the utility model, during the flow of wastewater, when driving is required, the pump body can be used as the driving force. This is an existing well-known technology, and some parts of the utility model are not described in detail.

[0048] In all the schemes mentioned above, the connection between two parts can be selected according to the actual situation by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which will not be described one by one here. In the above, all fixed connections are preferably considered to be welding. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents;

[0049] In all the schemes mentioned above, if there is no clear description, the operation of electrical components is controlled by the controller. Since the devices matched with the controller are common devices, their control principles and line connections are all well-known and mature technologies, and their electrical connection relationships and specific circuit structures are not described here.

[0050] In all the schemes mentioned above, the motor involved can be matched with a reducer if necessary. The connection structure and working principle between the motor and the reducer are existing well-known technologies, and the utility model will not elaborate on them.

[0051] Among all the solutions mentioned above, those involving the connection between solar panels and batteries can be equipped with necessary accessories such as inverters, battery charging controllers, cables, fuses, and brackets. Their control principles and line connections are all well-known and mature technologies, and their electrical connection relationships and specific circuit structures will not be described in detail here.

Claims

1. A wastewater evaporator for preparing potato starch, comprising a first-effect evaporator (1), a second-effect evaporator (2) and a preheating box (3), characterized in that: The side walls of the first-effect evaporator (1) and the second-effect evaporator (2) are both provided with a heating coil (4). The heating coil (4) on the first-effect evaporator (1) is connected to a steam source. The steam generated by the first-effect evaporator (1) is transported to the inside of the heating coil (4) of the second-effect steam. The steam generated by the second-effect evaporator (2) is transported to the inside of the preheating box (3). The first-effect evaporator (1) and the second-effect evaporator (2) are both provided with a feed pipe (5) and a discharge pipe (6). A liquid infusion pipe is provided between the discharge pipe (6) at the bottom of the first-effect evaporator (1) and the feed pipe (5) on the side wall of the second-effect evaporator (2). (7), the preheating box (3) is provided with a liquid inlet pipe (8) and a liquid outlet pipe (9), the liquid outlet pipe (9) is connected to the feed pipe (5) on the first-effect evaporator (1), the first-effect evaporator (1) and the second-effect evaporator (2) are both provided with a rotating shaft (10) rotatably mounted via a bearing, the rotating shaft (10) is provided with a scraper (11) in cooperation with the inner wall of the first-effect evaporator (1) and the second-effect evaporator (2), and the rotating shaft (10) is provided with a stirring blade group (12), and the top of the first-effect evaporator (1) and the second-effect evaporator (2) are both provided with a motor (13) in cooperation with the rotating shaft (10).

2. A wastewater evaporator for potato starch preparation according to claim 1, characterized in that: The tops of the first-effect evaporator (1) and the second-effect evaporator (2) are both provided with steam exhaust pipes (14), and a steam delivery pipe (15) is provided between the heating coil (4) of the second-effect evaporator (2) and the steam exhaust pipe (14) at the top of the first-effect evaporator (1).

3. A wastewater evaporator for potato starch preparation according to claim 1, characterized in that: A preheating pipe (16) is arranged in a serpentine shape in the preheating box (3); the steam discharge pipe (14) on the second-effect evaporator (2) is connected to the air inlet end of the preheating pipe (16) via a pipeline; and the discharge end of the preheating pipe (16) extends to the outside of the preheating box (3) to form a first condensed water discharge pipe (17).

4. A wastewater evaporator for potato starch preparation according to claim 2, characterized in that: It also includes a steam source pipe (18), on which a branch pipe (19) is provided, which is respectively connected to the heating coil (4) on the first-effect evaporator (1) and the steam delivery pipe (15), and on which a valve (20) is provided. The steam source pipe (18) is connected to an external steam source.

5. A wastewater evaporator for potato starch preparation according to claim 1, characterized in that: The tail ends of the heating coil (4) extend to the outside of the first-effect evaporator (1) and the second-effect evaporator (2), respectively, and are provided with a second condensed water discharge pipe (21).

6. A wastewater evaporator for potato starch preparation according to any one of claims 1 to 5, characterized in that: The stirring blade group (12) comprises a first spiral blade (22), the first spiral blade (22) being arranged on the rotating shaft (10), and a second spiral blade (23) being arranged on the outer side in the opposite direction.

7. A wastewater evaporator for potato starch preparation according to claim 6, characterized in that: A connecting rod (24) is provided on the rotating shaft (10), the scraper (11) is provided at the tail end of the connecting rod (24), and the first spiral blade (22) and the second spiral blade (23) are both partially fixed on the connecting rod (24).

8. A wastewater evaporator for potato starch preparation according to claim 1, characterized in that: The liquid delivery pipe (7) is provided with a pump body (25), and the discharge pipe (6) is provided with a control valve (26).

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