A steam ejector and circulating heating system for starch liquefaction

Abstract

The utility model discloses a kind of steam ejector and circulating heating system for starch liquefaction, including shell, the top of the shell is provided with steam inlet pipe and the feed pipe located in the side of shell, which are communicated with steam injection pipe, the inside of the steam inlet pipe is provided with filter screen one and filter screen two for impurity removal. Prevent the impurities contained in steam from entering the inside of steam injection pipe, prevent starch particles from settling, reduce the waste of steam, realize circulating heating.

Description

Technical Field

[0001] This utility model relates to the field of starch liquefaction processing technology, specifically to a steam ejector and circulating heating system for starch liquefaction. Background Technology

[0002] Currently, the production of various sugars from starch through fermentation commonly employs liquefaction jetting technology. Its main principle is to utilize a fluid to transfer energy and create a vacuum. Due to the extremely high velocity of the jetting steam, pressure energy is converted into velocity energy, reducing the pressure in the suction zone and creating a vacuum. The starch slurry pumped in by the feed pump is drawn away by the suction gas, undergoes thorough mixing and compression with the high-pressure steam, and undergoes molecular diffusion energy exchange, achieving velocity equalization. After passing through a stepped diffuser where the velocity decreases and the pressure increases, the slurry is ejected from the outlet, completing the entire process.

[0003] Existing liquefied steam ejectors suffer from several drawbacks. The steam entering the ejector contains numerous impurities, causing blockages in the steam inlet pipe and affecting steam efficiency. Furthermore, the mixing chamber can cause starch granules to settle during use, increasing the difficulty of subsequent saccharification processes, reducing raw material conversion rates, and lowering production efficiency. Additionally, steam is wasted during operation.

[0004] Therefore, this application is submitted. Utility Model Content

[0005] The purpose of this utility model is to provide a steam injector and circulating heating system for starch liquefaction. By setting detachable filter screen 1 and filter screen 2 inside the steam inlet pipe, and setting a spiral groove and return pipe inside the mixing chamber, impurities contained in the steam are prevented from entering the steam injection pipe, starch particles are prevented from settling, and steam waste is reduced, thus solving the problems existing in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0007] A steam ejector for starch liquefaction includes a housing, a steam injection pipe connected to a steam inlet pipe at the top of the housing and a feed pipe located on the side of the housing, and a filter screen one and a filter screen two for impurity removal inside the steam inlet pipe.

[0008] Furthermore, the interior of the steam inlet pipe is symmetrically provided with sliding grooves, and the outer circumferential surfaces of filter screen one and filter screen two are symmetrically provided with assembly blocks located within the sliding grooves.

[0009] Furthermore, a connecting rod is provided on the assembly block between filter screen one and filter screen two.

[0010] Furthermore, a second connecting rod is provided at the end of the assembly block near the steam inlet pipe, and the second connecting rod is adjacent to the first filter screen.

[0011] Furthermore, a push-pull rod is provided on the outer wall of the end of the second connecting rod.

[0012] Furthermore, both filter screen one and filter screen two have an outer diameter that matches the inner diameter of the steam inlet pipe.

[0013] Furthermore, the filter pores of filter screen one are larger than those of filter screen two.

[0014] Furthermore, the bottom end of the housing is connected to the mixing chamber, and the inner wall of the mixing chamber is provided with a spiral groove.

[0015] A steam ejector circulating heating system for starch liquefaction uses the aforementioned steam ejector. The bottom end of the mixer of the steam ejector is connected in sequence to a holding pipe and a flash tank. The pipeline between the holding pipe and the flash tank is provided with a return pipeline connected to the feed pipe.

[0016] The beneficial effects of this utility model are:

[0017] This utility model features two removable filters inside the steam inlet pipe, effectively intercepting large particles such as rust and scale, as well as tiny particles, in the steam to improve steam efficiency. The mixing chamber is designed with a spiral groove to create a swirling mixture between the starch milk and the steam, resulting in turbulent flow and preventing starch particles from settling. The maintaining pipe and flash tank are connected to the feed pipe via a return pipe to reduce steam loss and achieve circulating heating. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the steam inlet pipe of this utility model;

[0020] Figure 3 This is a cross-sectional view of the steam inlet pipe of this utility model.

[0021] Figure 4 This is a schematic diagram of the circulating heating system of this utility model.

[0022] Reference numerals: 1-Shell, 10-Feed pipe, 11-Steam injection pipe, 12-Steam inlet pipe, 120-Sliding groove, 121-Filter screen one, 122-Filter screen two, 123-Connecting rod one, 124-Connecting rod two, 125-Assembly block, 126-Push-pull rod, 13-Mixing chamber, 130-Groove, 2-Maintaining pipe, 3-Flash tank, 4-Return pipe. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0024] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1

[0027] Embodiment 1 of this utility model is a steam ejector for starch liquefaction, including a housing 1. The top of the housing 1 is provided with a steam injection pipe 11 communicating with a steam inlet pipe 12 and a feed pipe 10 located on the side of the housing 1. The steam inlet pipe 12 is provided with a filter screen 121 and a filter screen 122 for removing impurities.

[0028] Reference Figures 1 to 3 In this application, a filter screen 121 and a filter screen 122 are installed inside the steam inlet pipe 12. The filter screen 121 and the filter screen 122 are detachably connected inside the steam inlet pipe 12, which facilitates the timely cleaning of impurities after steam filtration by the filter screen 121 and the filter screen 122, intercepting large particles of impurities such as rust and scale in the steam, and improving the steam efficiency.

[0029] It should be noted that the steam inlet pipe 12 has symmetrically arranged sliding grooves 120 inside, and the outer circumferential surfaces of filter screen one 121 and filter screen two 122 are symmetrically arranged with assembly blocks 125 located within the sliding grooves 120. A connecting rod one 123 is provided on the assembly block 125 between filter screen one 121 and filter screen two 122. A connecting rod two 124 is provided on the end of the assembly block 125 near the inlet of the steam inlet pipe 12, and the connecting rod two 124 is adjacent to filter screen one 121.

[0030] The detachable connection between filter screen 121 and filter screen 22 inside the steam inlet pipe 12 is mainly achieved through the connection between assembly block 125 and connecting rod 123 and connecting rod 224. Connecting rod 123 connects the left and right assembly blocks 125 to form a whole. Both connecting rod 123 and connecting rod 224 are located inside the sliding groove 120. They can be pushed and pulled by connecting rod 224 to the assembly block 125 and connecting rod 123, thereby allowing filter screen 121 and filter screen 222 to slide to the outer periphery of the steam inlet pipe 12 for removal and cleaning, making disassembly and assembly convenient.

[0031] During assembly and disassembly, force is primarily applied via the push-pull rod 126, which is located on the outer wall of the end of the connecting rod 124. The end of the connecting rod 124 can be flush with or lower than the end face of the steam inlet pipe 12, thus not affecting the connection between the steam inlet pipe 12 and the steam equipment. The push-pull rod 126 primarily provides a force-bearing function, facilitating hand gripping and generating push-pull force. The specific specifications of the push-pull rod 126 can be set according to actual conditions and will not be elaborated here.

[0032] In some preferred embodiments, both filter screen 121 and filter screen 122 have an outer diameter adapted to the inner diameter of the steam inlet pipe 12. The filter pores of filter screen 121 are larger than those of filter screen 122. Filter screen 121 is located near the inlet of the steam inlet pipe 12, with filter pores of 3-5 mm, which can intercept large particles of impurities such as rust and scale. Filter screen 122 is located near the outlet of the steam inlet pipe 12, performing secondary fine filtration. The filter pores are 50-100 μm and can be made of sintered metal, resistant to temperatures up to 200°C, to prevent small particles from entering the interior of the ejector housing 1.

[0033] In some preferred embodiments, the bottom end of the housing 1 is connected to the mixing chamber 13, and the inner wall of the mixing chamber 13 is provided with a spiral groove 130. The spiral groove 130 has no dead corners, allowing the starch milk and steam to form a swirling mixture, creating turbulence and preventing starch particles from settling. Simultaneously, a PTFE (Teflon) coating can be sprayed onto the inner wall of the groove 130 to reduce the adhesion rate of starch to the inner wall of the groove 130 in the mixing chamber 13. The thickness and roughness of the coating can be set according to actual conditions, and will not be listed here.

[0034] Example 2

[0035] A steam ejector circulating heating system for starch liquefaction uses the steam ejector of Example 1. The bottom end of the mixer of the steam ejector is connected in sequence to the holding pipe 2 and the flash tank 3. The pipeline between the holding pipe 2 and the flash tank 3 is provided with a return pipeline connected to the feed pipe 10.

[0036] During the preheating stage, fresh steam enters before the pump. After passing through the ejector, holding pipe 2, and flash tank 3, some of the liquid flows back to the inlet of the ejector's feed pipe 10 through the return pipe 4 for reheating. This cycle continues, and the liquid temperature gradually increases. When the ejector outlet temperature reaches the set value, the fresh steam is switched to the material, completing the preheating process and entering the normal operation stage.

[0037] The principle of this utility model is as follows: The steam inlet pipe 12 is equipped with a detachable filter screen 121 and a filter screen 122 to effectively intercept large particles of impurities such as rust and scale in the steam, as well as small particles, thereby improving the steam efficiency; The mixing chamber 13 is equipped with a spiral groove 130 to make the starch milk and steam form a swirling mixture, making the fluid turbulent and preventing starch particles from settling; The holding pipe 2 and the flash tank 3 are connected to the feed pipe 10 via a return pipe 4 to reduce steam loss and achieve circulating heating.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present utility model and within the spirit and principles of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A steam injector for starch liquefaction, characterized in that, Includes a housing (1), the top of which is provided with a steam injection pipe (11) communicating with a steam inlet pipe (12) and a feed pipe (10) located on the side of the housing (1), and the inside of the steam inlet pipe (12) is provided with a filter screen one (121) and a filter screen two (122) for removing impurities.

2. The steam injector for starch liquefaction according to claim 1, characterized in that, The steam inlet pipe (12) is symmetrically provided with sliding grooves (120), and the outer peripheral surfaces of filter screen one (121) and filter screen two (122) are symmetrically provided with assembly blocks (125) located in the sliding grooves (120).

3. A steam injector for starch liquefaction according to claim 2, characterized in that, The assembly block (125) between filter screen one (121) and filter screen two (122) is provided with connecting rod one (123).

4. A steam injector for starch liquefaction according to claim 2, characterized in that, The assembly block (125) is provided with a connecting rod two (124) at the end near the inlet of the steam inlet pipe (12), and the connecting rod two (124) is near the filter screen one (121).

5. A steam injector for starch liquefaction according to claim 4, characterized in that, A push-pull rod (126) is provided on the outer wall of the end of the connecting rod 2 (124).

6. A steam injector for starch liquefaction according to claim 4, characterized in that, Both filter screen one (121) and filter screen two (122) have an outer diameter that matches the inner diameter of the steam inlet pipe (12).

7. A steam injector for starch liquefaction according to claim 4, characterized in that, The filter holes of filter screen one (121) are larger than those of filter screen two (122).

8. A steam injector for starch liquefaction according to claim 4, characterized in that, The bottom end of the housing (1) is connected to the mixing chamber (13), and the inner wall of the mixing chamber (13) is provided with a spiral groove (130).

9. A steam ejector circulating heating system for starch liquefaction, characterized in that, The steam ejector according to any one of claims 1 to 8 is used, wherein the bottom end of the mixer of the steam ejector is connected in sequence to the holding pipe (2) and the flash tank (3), and the pipeline between the holding pipe (2) and the flash tank (3) is provided with a return pipeline connected to the feed pipe (10).

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