Evaporating tank for producing raw sugar

Abstract

The utility model provides an evaporating tank for producing raw sugar, which belongs to the field of evaporating tanks and comprises an evaporating tank body, a top cover is arranged at the top end of the evaporating tank body, a juice steam outlet is arranged on the top cover, a juice catcher and an annular flushing pipeline are respectively arranged on the upper portion inside the evaporating tank body, and the annular flushing pipeline is arranged below the juice catcher. An evaporation chamber is arranged in the middle of the interior of the evaporation tank body, a heating chamber is arranged on the lower portion of the interior of the evaporation tank body, a downcomer, a heating body and an ammonia gas pipeline are arranged in the heating chamber, a bottom cover is arranged at the bottom end of the evaporation tank body, a juice inlet, a juice outlet and an ammonia gas outlet are formed in the middle of the bottom cover, and the ammonia gas outlet is connected with the ammonia gas pipeline. The evaporation tank is a direct-in and direct-out evaporation tank, sugar juice is heated in the heating chamber through the heating body and discharged through the juice outlet connected with the downcomer, the sugar juice does not circulate in the tank, the retention time of the sugar juice in the tank is short, the influence on the color of the sugar juice is small, conversion of the sugar juice is small, and sugar recovery is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of evaporation tanks, in particular to an evaporation tank for raw sugar production. Background Art

[0002] Evaporation tanks are generally used in the sugar industry and sugar processing plants. They are mainly used to heat an aqueous solution containing non-volatile solute sugar to boiling, separate the juice vapor and the sugar juice, so as to achieve the purpose of evaporation and concentration, thereby evaporating the water in the syrup and improving the purity of the syrup.

[0003] However, the existing evaporation tanks generally have the following problems: the residence time of the sugar juice in the tank is long, which has a great impact on the color of the sugar juice, and the conversion of the sugar juice is also relatively large, ultimately affecting the sugar recovery, the quality of the finished product and the production cost. Therefore, there is an existing evaporation tank for raw sugar production. Content of the Utility Model

[0004] The purpose of the utility model is to provide an evaporation tank for raw sugar production to solve the technical problems mentioned in the background art.

[0005] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] An evaporation tank for raw sugar production includes an evaporation tank body. A top cover is provided at the top of the evaporation tank body, and a juice vapor outlet is provided on the top cover. A juice catcher and an annular flushing pipeline are respectively arranged in the upper part of the evaporation tank body. The annular flushing pipeline is arranged below the juice catcher. An evaporation chamber is arranged in the middle of the evaporation tank body, and a heating chamber is arranged in the lower part of the evaporation tank body. A downcomer, a heating element and an ammonia pipeline are respectively arranged in the heating chamber. A bottom cover is provided at the bottom of the evaporation tank body, and a juice inlet, a juice outlet and an ammonia outlet are arranged in the middle of the bottom cover. The ammonia outlet is connected to the ammonia pipeline; the juice catcher includes a shell and an inner box. The inner box is arranged inside the shell, and a juice vapor outlet pipe is arranged inside the inner box. One end of the juice vapor outlet pipe extends out of the top of the shell and is connected to the juice vapor outlet.

[0007] Further, an upper maintenance opening is provided on one side of the upper part of the evaporation tank body, and a first pressure gauge is provided on the upper part of the evaporation tank body.

[0008] Further, a corrugated plate is provided at the top of the inner box. The corrugated plate and the inner box are set as a detachable device. The juice vapor outlet pipe passes through the corrugated plate. The inner box is connected to the inner side of the shell through a connecting rod. A connecting base is provided at the bottom of the shell, and the connecting base is connected to the shell.

[0009] Further, a valve rod device and a sight glass are provided on the upper side wall of the evaporation chamber.

[0010] Further, the downcomer is arranged in the middle of the heating chamber, the heating elements are respectively arranged outside the downcomer, the upper end of the downcomer extends into the evaporation chamber, and the lower end of the downcomer is connected to the juice outlet.

[0011] Further, a second pressure gauge is arranged on the side wall of the heating chamber, an annular steam pipe is arranged on the outer side wall of the upper part of the heating chamber, one end of the annular steam pipe extends into the interior of the heating chamber, a stop valve is arranged at the other end of the annular steam pipe, and a second pressure gauge and a thermometer are respectively arranged on the annular steam pipe.

[0012] Further, a sewage outlet and a lower maintenance opening are respectively arranged on one side of the bottom cover, and the juice inlet and the ammonia outlet are respectively arranged on both sides of the juice outlet.

[0013] Due to the adoption of the above technical solutions, the utility model has the following beneficial effects:

[0014] 1. The evaporation tank set in the utility model is a straight-in and straight-out type evaporation tank. The sugar juice is heated by the heating element in the heating chamber and discharged through the juice outlet connected to the sugar juice of the downcomer. There is no circulation in the tank, the residence time of the sugar juice in the tank is short, the influence on the color of the sugar juice is small, the conversion of the sugar juice is also less, which is beneficial to the recovery of sugar.

[0015] 2. An annular flushing pipeline is arranged in the evaporation tank set in the utility model. The accumulated scale flushed out can be used as the raw material of a fertilizer factory and there is no harmful substance emission; by arranging an ammonia pipeline in the evaporation tank, ammonia gas is discharged out of the tank to avoid affecting the quality of the syrup.

[0016] 3. A juice catcher is arranged in the evaporation tank set in the utility model. The corrugated plate in the juice catcher can improve the capture efficiency of the syrup in the steam, thereby improving the recovery efficiency of the syrup; the corrugated plate and the inner box are set as a detachable device, and it can be disassembled for convenient cleaning. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the evaporation tank of the utility model;

[0018] Figure 2 is a cross-sectional view of the juice catcher of the utility model.

[0019] In the attached drawings, 1 is the evaporation tank body, 11 is the upper inspection opening, 12 is the first pressure gauge, 2 is the top cover, 21 is the juice vapor outlet, 3 is the juice catcher, 31 is the housing, 32 is the inner box, 33 is the juice vapor outlet pipe, 34 is the connecting rod, 35 is the corrugated plate, 36 is the connecting base, 4 is the evaporation chamber, 41 is the valve rod device, 42 is the sight glass, 43 is the thermometer, 5 is the heating chamber, 51 is the downcomer, 52 is the heating element, 53 is the ammonia pipeline, 54 is the second pressure gauge, 55 is the annular steam pipe, 56 is the stop valve, 6 is the bottom cover, 61 is the juice inlet, 62 is the juice outlet, 63 is the ammonia outlet, 64 is the sewage outlet, 65 is the lower inspection opening, and 7 is the annular flushing pipeline. Detailed implementation manners

[0020] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following presents preferred embodiments with reference to the attached drawings and further elaborates on the present utility model in detail. However, it should be noted that many details listed in the specification are only for enabling the reader to have a thorough understanding of one or more aspects of the present utility model, and these aspects of the present utility model can be implemented even without these specific details.

[0021] As Figure 1 shown, an evaporation tank for raw sugar production includes an evaporation tank body 1. A top cover 2 is provided at the top of the evaporation tank body 1, and a juice vapor outlet 21 is provided on the top cover 2. Inside the upper part of the evaporation tank body 1, a juice catcher 3 and an annular flushing pipeline 7 are respectively provided. The annular flushing pipeline 7 is provided below the juice catcher 3. Since the sugar-containing juice vapor collides with the juice catcher 3, sugar foam will hang on the juice catcher 3 and form strips, which can be better flushed away by the annular flushing pipeline 7 from bottom to top. An evaporation chamber 4 is provided in the middle of the evaporation tank body 1, and a heating chamber 5 is provided in the lower part of the evaporation tank body 1. Inside the heating chamber 5, a downcomer 51, a heating element 52 and an ammonia pipeline 53 are respectively provided. A bottom cover 6 is provided at the bottom of the evaporation tank body 1, and a juice inlet 61, a juice outlet 62 and an ammonia outlet 63 are provided in the middle of the bottom cover 6. The ammonia outlet 63 is connected to the ammonia pipeline 9, and the juice outlet 62 is connected to the downcomer 51. The evaporation tank provided by the present utility model is a direct-in and direct-out type evaporation tank. The sugar juice is heated by the heating element 52 in the heating chamber 5 and discharged through the juice outlet 62 connected to the sugar juice of the downcomer 51. There is no circulation in the tank, the residence time of the sugar juice in the tank is short, the influence on the color of the sugar juice is small, and the conversion of the sugar juice is also less, which is beneficial to the recovery of sugar.

[0022] As Figure 2As shown, the juice catcher 3 includes a housing 31 and an inner tank 32. The inner tank 32 is arranged inside the housing 31. A juice vapor outlet pipe 33 is arranged inside the inner tank 32. One end of the juice vapor outlet pipe 33 extends out of the top end of the housing 31, and the juice vapor outlet pipe 33 is connected to the juice vapor outlet 21. A corrugated plate 35 is arranged at the top end of the inner tank 32. The juice vapor outlet pipe 33 passes through the corrugated plate 35. The inner tank 32 is connected to the inner side of the housing 31 through a connecting rod 34. A connecting base 36 is arranged at the bottom end of the housing 31, and the connecting base 36 is connected to the housing 31. During use, the sugar-containing juice vapor rises and is first captured by the inner tank 32 and then flows back into the evaporation tank. The juice vapor with low sugar content continues to rise and collides with the corrugated plate 35 and adheres to the surface of the corrugated plate 35 to form sugar foam. As the sugar foam accumulates and settles, it flows back into the evaporation tank. The low-sugar juice vapor is discharged through the juice vapor outlet pipe 33. Strengthening the capture of juice vapor is beneficial to the recovery of sugar-containing juice vapor. The corrugated plate 35 in the juice catcher can improve the capture efficiency of syrup in the steam, thereby improving the recovery efficiency of syrup. The corrugated plate 35 and the inner tank 32 are set as a detachable device, which can be disassembled for convenient cleaning.

[0023] In an embodiment of the present invention, an upper maintenance opening 11 is arranged on one side of the upper part of the evaporation tank body 1, which is convenient for later maintenance. A first pressure gauge 12 is arranged on the upper part of the evaporation tank body 1 for detecting the pressure on the upper part of the evaporation tank body 1. A valve rod device 41 and a sight glass 42 are arranged on the upper side wall of the evaporation chamber 4. The sight glass 42 is used to observe the evaporation situation inside the evaporation chamber 4.

[0024] In an embodiment of the present invention, the downcomer 51 is arranged in the middle of the heating chamber 5. The heating elements 52 are respectively arranged outside the downcomer 51. The upper end of the downcomer 51 extends into the evaporation chamber 4, and the lower end of the downcomer 51 is connected to the juice outlet 62. The sugar juice is discharged through the juice outlet connected to the sugar juice in the downcomer. There is no circulation in the tank, and the residence time of the sugar juice in the tank is short, which has little impact on the color of the sugar juice and less conversion of the sugar juice, which is beneficial to the recovery of sugar.

[0025] In an embodiment of the present utility model, a second pressure gauge 54 is provided on the side wall of the heating chamber 5, an annular steam pipe 55 is provided on the outer side wall of the upper part of the heating chamber 5, one end of the annular steam pipe 55 extends into the interior of the heating chamber 5, the heating chamber 5 is communicated with the evaporation chamber, a stop valve 56 is provided on the other end of the annular steam pipe 55 to control the on-off of the annular steam pipe 55, and a second pressure gauge 54 and a thermometer 43 are respectively provided on the annular steam pipe 55 to monitor the pressure and temperature inside the heating chamber 5. The steam in the annular steam pipe 55 enters the heating chamber 5 through the stop valve 56 for heating. A sewage discharge port 64 and a lower maintenance port 65 are respectively provided on one side of the bottom cover 6. When cleaning the sewage tank or discharging sewage, the sewage discharge port 64 is used to discharge the dirt in the evaporation tank, and the lower maintenance port 65 facilitates the later maintenance and repair of the evaporation tank. The juice inlet 61 and the ammonia outlet 63 are respectively provided on both sides of the juice outlet 62.

[0026] Working principle

[0027] The sugar juice enters the heating chamber 5 from the juice inlet 61 of the bottom cover 6 for heating and rising, evaporates in the evaporation chamber 4, a part descends and is discharged from the juice outlet 62 through the downcomer 51, and another part of the juice vapor containing sugar rises and is first captured by the inner box 32 and flows back into the evaporation tank; a small part of the juice vapor containing low sugar rises and collides with the corrugated plate 35 and adheres to the surface of the corrugated plate 35 to form sugar foam. As the sugar foam accumulates and settles, it flows back into the evaporation tank, and the low-sugar juice vapor is discharged through the juice vapor outlet pipe 33, which is beneficial to the recovery of the juice vapor containing sugar. The corrugated plate 35 in the juice trap can improve the capture efficiency of the syrup in the steam, thereby improving the recovery efficiency of the syrup.

[0028] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. An evaporator for raw sugar production, characterized in that: It includes an evaporation tank body (1), a top cover (2) is arranged at the top end of the evaporation tank body (1), a juice vapor outlet (21) is arranged on the top cover (2), a juice catcher (3) and an annular flushing pipeline (7) are respectively arranged in the upper part inside the evaporation tank body (1), the annular flushing pipeline (7) is arranged below the juice catcher (3), an evaporation chamber (4) is arranged in the middle part inside the evaporation tank body (1), a heating chamber (5) is arranged in the lower part inside the evaporation tank body (1), a downcomer (51), a heating element (52) and an ammonia pipeline (53) are respectively arranged in the heating chamber (5), a bottom cover (6) is arranged at the bottom end of the evaporation tank body (1), a juice inlet (61), a juice outlet (62) and an ammonia outlet (63) are arranged in the middle of the bottom cover (6), and the ammonia outlet (63) is connected to an ammonia pipeline (9); The juice catcher (3) includes a housing (31) and an inner box (32), the inner box (32) is arranged inside the housing (31), a juice vapor outlet pipe (33) is arranged inside the inner box (32), one end of the juice vapor outlet pipe (33) extends out of the top end of the housing (31), and the juice vapor outlet pipe (33) is connected to the juice vapor outlet (21).

2. The evaporator for raw sugar production according to claim 1, characterized in that: An upper maintenance opening (11) is arranged on one side of the upper part of the evaporation tank body (1), and a first pressure gauge (12) is arranged on the upper part of the evaporation tank body (1).

3. An evaporator for raw sugar production according to claim 1, characterized in that: A corrugated plate (35) is arranged at the top end of the inner box (32), the juice vapor outlet pipe (33) is arranged through the corrugated plate (35), the inner box (32) is connected to the inner side of the housing (31) through a connecting rod (34), a connecting base (36) is arranged at the bottom end of the housing (31), and the connecting base (36) is connected to the housing (31).

4. An evaporator for raw sugar production according to claim 1, characterized in that: A valve rod device (41) and a sight glass (42) are arranged on the upper side wall of the evaporation chamber (4).

5. An evaporator for raw sugar production according to claim 1, characterized in that: The downcomer (51) is arranged in the middle of the heating chamber (5), the heating elements (52) are respectively arranged outside the downcomer (51), the upper end of the downcomer (51) extends into the evaporation chamber (4), and the lower end of the downcomer (51) is connected to the juice outlet (62).

6. The evaporator for raw sugar production according to claim 1, characterized in that: A second pressure gauge (54) is arranged on the side wall of the heating chamber (5), an annular steam pipe (55) is arranged on the outer side wall of the upper part of the heating chamber (5), one end of the annular steam pipe (55) extends into the inside of the heating chamber (5), a stop valve (56) is arranged at the other end of the annular steam pipe (55), and a second pressure gauge (54) and a thermometer (43) are respectively arranged on the annular steam pipe (55).

7. An evaporator for raw sugar production according to claim 1, characterized in that: A sewage outlet (64) and a lower maintenance opening (65) are respectively arranged on one side of the bottom cover (6), and the juice inlet (61) and the ammonia outlet (63) are respectively arranged on both sides of the juice outlet (62).

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