Maize germ meal slurry adding and drying system

Abstract

The utility model discloses a corn germ meal slurry adding and drying system which is characterized in that germ meal in a leaching workshop enters a vibrating screen, an oversize outlet is connected with a lower end inlet of a first elevator, and an undersize outlet is connected with a germ meal packaging unit through a small particle discharging conveyor; an outlet in the tail end of the small particle discharging conveyor is also connected with an inlet in the lower end of the first elevator, the upper end of the first elevator is connected with an inlet of the surge bin, an outlet of the surge bin and the corn steep liquor pipe are both connected with the slurry adding mixer, and a discharging port of the slurry adding mixer is connected with the standing bed; a discharging port of the standing bed is connected with an inlet of the belt conveyor through the discharging machine, an outlet of the belt conveyor is connected with the roller dryer, an outlet of the roller dryer is connected with an inlet of the tube bundle dryer, an outlet of the tube bundle dryer is connected with the cooler through the second elevator, and a discharging port of the cooler is connected with an inlet of the smashing machine. And an outlet of the crusher is connected with the pulp adding and packaging unit. The system can improve the added value of products and increase the profit of enterprises.

Description

Technical Field

[0001] The utility model relates to a germ meal drying system, in particular to a corn germ meal pulping and drying system, belonging to the technical field of germ meal processing. Background Art

[0002] Corn pulp, a byproduct of corn starch production, is rich in beneficial ingredients such as protein (approximately 38% to 42%), lactic acid (12% to 13%), and amino acids (2.5% to 3.5%), and also contains a high ash content (about 19% to 21%). In general starch processing plants, in order to improve the nutritional value of fiber products, corn pulp is added to the fiber with a low protein content, which can effectively increase the protein content of the fiber from 8% to 18%.

[0003] However, it is found in practice that when the amount of corn pulp added is too large, the fiber color will become darker or even black, and the ash content will exceed the standard range, which directly affects the quality and market price of fiber products, as the selling price of pulped fiber is often lower than that of unpulped fiber. In view of this situation, starch factories generally control the amount of corn pulp added to no more than 70% of their total output in production practice to ensure product quality and economic benefits. As for the remaining 30% of corn pulp, it is necessary to seek other reasonable treatment methods, such as further deep processing, development of new products, or comprehensive utilization in combination with other industries.

[0004] With the expansion of starch plant production capacity, more and more factories have introduced supporting corn germ oil extraction production lines to effectively utilize corn pulp resources. Corn pulp is added to corn germ meal, which usually has a protein content of 15%-18%. Through this process, the protein content of germ meal can be increased to about 22%. The current process steps mainly include: First, after the corn germ meal is produced from the leaching workshop, it is transported to the molasses mixer through a scraper conveyor, and corn pulp is added simultaneously during the mixing process. The slurried germ meal material then enters the tube bundle dryer for drying. During the drying process, some materials have sticky tube problems due to high viscosity or excessive moisture, and some of them need to be returned to the molasses mixer for reprocessing. The exhaust gas discharged from the tube bundle dryer is collected by the fan and used as a heat source for the evaporator. The dried slurried germ meal is sent to the cooler through the elevator for cooling. After cooling, it is crushed into products that meet the specifications by the pulverizer and finally transported to the packaging workshop for packaging.

[0005] The current slurry drying system has the following main problems: 1. The sticky nature of corn slurry causes it to easily form adhesion inside the tube dryer under high moisture conditions, forcing some materials to be returned for reprocessing. In addition, the addition of corn slurry also causes the color of the germ meal to turn black, which in turn reduces the market value of the product.

[0006] 2. In the existing process flow, the mixing time of germ meal and corn syrup is too short, resulting in the corn syrup failing to fully penetrate into the germ meal. Most of it only stays on the surface. In addition, the amount of slurry added is limited, so the protein content in the germ meal is not effectively increased, thus affecting the economic value of the product.

[0007] 3. The lactic acid component contained in corn steep liquor has not fully exerted its biological activity, and has not fully utilized its advantages of improving the nutritional value of feed and promoting animal digestion and absorption. This means that there is still potential to be tapped in the entire production process, and the process needs to be optimized to fully utilize the lactic acid and other beneficial components in corn steep liquor. Utility Model Content

[0008] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0009] In view of the above problems and / or the problems existing in the prior art, the present utility model is proposed.

[0010] The purpose of the utility model is to overcome the problems existing in the prior art and provide a corn germ meal pulping and drying system, which can improve the added value of products and increase corporate profits by optimizing various production links and effectively utilizing the characteristics of various processed products.

[0011] In order to solve the above technical problems, the utility model provides a corn germ meal pulping and drying system, comprising a scraper conveyor connected to the germ meal outlet of the leaching workshop, the outlet of the scraper conveyor is connected to the inlet of the vibrating screen, the upper screen outlet of the vibrating screen is connected to the lower end inlet of the first elevator, the lower screen outlet of the vibrating screen is connected to the inlet of the small particle discharging conveyor, and the middle outlet of the small particle discharging conveyor is connected to the germ meal packaging unit through an air lock;

[0012] The end outlet of the small particle discharging conveyor is also connected to the lower inlet of the first elevator, the upper outlet of the first elevator is connected to the inlet of the buffer bin, the outlet of the buffer bin is connected to the feed port of the pulping mixer through an air conveying pipe, the pulping port of the pulping mixer is connected to the corn pulp pipe, the discharge port of the pulping mixer is connected to the static bed, the discharge port of the static bed is connected to the inlet of the belt conveyor through the discharging machine, the outlet of the belt conveyor is connected to the inlet of the drum dryer, the outlet of the drum dryer is connected to the inlet of the tube bundle dryer through the drum drying discharging auger, the outlet of the tube bundle dryer is connected to the inlet of the cooler through the second elevator, the discharge port of the cooler is connected to the inlet of the crusher, and the outlet of the crusher is connected to the pulping packaging unit.

[0013] Furthermore, the corn slurry output pipe of the starch workshop is connected to the inlet of the corn slurry storage tank, and the bottom outlet of the corn slurry storage tank is connected to the slurry adding port of the slurry adding mixer through a delivery pump.

[0014] Furthermore, the hot air outlet of the tube bundle dryer is connected to the inlet of the dust removal brake, and the air outlet of the dust removal brake is connected to the heat source inlet of the evaporator through a drying centrifugal fan.

[0015] Compared with the prior art, the utility model has achieved a number of significant beneficial effects through a series of innovative improvements: 1. The corn germ meal produced by the germ oil pressing workshop is graded by particle size, and small-particle germ meal with better quality is identified and separated. This part of the germ meal can be directly screened and packaged and sold as a high-quality single product because of its relatively low fiber content and high protein content of 18%, thereby improving the added value and economic benefits of the product.

[0016] 2. Through the improved pulping process, the pulped germ meal, which originally had a protein content of about 22% due to its dark color, large price fluctuations, and low market value, has been optimized. This system has successfully increased the protein content of pulped germ meal to 28% by precisely controlling the addition ratio of corn pulp from the original 1:1.5 to 1:2.5, and combined with process steps such as static reaction and two-stage drying, greatly improving its market competitiveness and value.

[0017] 3. In the drying process, the utility model reduces the initial moisture entering the tube bundle dryer and reduces the moisture on the surface of the material, thereby greatly reducing the occurrence of tube sticking, avoiding the return operation, and improving the product color of the pulped germ meal.

[0018] 4. The soaking process is added to ensure that the corn syrup fully penetrates into the germ meal, while giving the lactic acid in the corn syrup time to ferment naturally, thereby improving the nutritional level of the germ meal and giving full play to the positive role of lactic acid in improving product quality.

[0019] 5. Combining the above improvement measures, the utility model increases the comprehensive value of each ton of pulped germ meal by about 500 yuan, achieving a dual improvement in product performance and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. The drawings are only provided for reference and explanation, not for limiting the present utility model. Among them:

[0021] Figure 1 This is a flow chart of the corn germ meal pulping and drying system of the utility model;

[0022] In the figure: germ meal screening: scraper conveyor 101; vibrating screen 102; small particle discharging conveyor 103; small particle discharging air shutoff 104; first elevator 105; buffer bin 106; variable frequency auger 107; Roots blower 108; positive pressure air shutoff 109; screening pulse dust collector 110, screening centrifugal fan 111;

[0023] Infiltration and fermentation: pulp mixer 201; static bed 202; discharge machine 203; belt conveyor 204; corn pulp storage tank 205; delivery pump 206;

[0024] Primary drying: screw feeder 301; drum dryer 302; blower 303; heat exchanger 304; first brake dragon 305; air shutoff 306; primary drying fan 307; washing tower 308; washing circulation pump 309; drum drying discharge auger 310;

[0025] Secondary drying: tube bundle dryer 401; second elevator 402; cooler 403; feeder 404; crusher 405; dust removal brake 406; air shut-off device 407; drying centrifugal fan 408; pulse dust collector 409; induced draft fan 410;

[0026] Germ meal packaging unit 500; pulp packaging unit 600; steam pipe G1; condensate pipe G2. DETAILED DESCRIPTION

[0027] In the following description of the utility model, the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not mean that the device must have a specific direction.

[0028] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific figures. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] like Figure 1As shown, the corn germ meal pulping and drying system of the utility model includes a germ meal screening unit, an impregnation and fermentation unit, a primary drying unit and a secondary drying unit. The germ meal screening unit includes a scraper conveyor 101, a vibrating screen 102, a small particle discharging conveyor 103, a small particle discharging air shutoff 104, a first elevator 105, a buffer bin 106, a variable frequency auger 107, a roots blower 108, a positive pressure air shutoff 109, a screening pulse dust collector 110 and a screening centrifugal fan 111; the impregnation and fermentation unit includes a pulping mixer 201, a static bed 202, a discharging machine 203, a belt conveyor 204, a corn slurry storage tank 205 and a conveying pump 206; the primary drying unit includes a It includes a screw feeder 301, a drum dryer 302, a blower 303, a heat exchanger 304, a first brake 305, an air shutoff 306, a primary drying fan 307, a washing tower 308, a washing circulation pump 309 and a drum drying discharge auger 310; the secondary drying unit includes a tube bundle dryer 401, a second elevator 402, a cooler 403, a feeder 404, a crusher 405, a dust removal brake 406, an air shutoff 407, a drying centrifugal fan 408, a pulse dust collector 409 and an induced draft fan 410.

[0031] The inlet of the scraper conveyor 101 is connected to the germ meal outlet of the leaching workshop, the outlet of the scraper conveyor 101 is connected to the inlet of the vibrating screen 102, the upper screen outlet of the vibrating screen 102 is connected to the lower end inlet of the first elevator 105, the lower screen outlet of the vibrating screen 102 is connected to the inlet of the small particle discharging conveyor 103, the middle outlet of the small particle discharging conveyor 103 is connected to the germ meal packaging unit 500 through an air lock, and the end outlet of the small particle discharging conveyor 103 is also connected to the lower end inlet of the first elevator 105.

[0032] The outlet at the upper end of the first elevator 105 is connected to the inlet of the buffer bin, and a variable frequency auger 107 is installed at the bottom of the buffer bin. The outlet of the variable frequency auger 107 is connected to the feed port of the positive pressure air shutoff device 109, and the air inlet of the positive pressure air shutoff device 109 is connected to the outlet pipe of the Roots blower 108. The outlet of the positive pressure air shutoff device 109 is connected to the feed port of the pulping mixer 201 through an air delivery pipe.

[0033] The air suction hood, discharge chute and top outlet of the vibration screen 102 are connected to the air inlet of the screening pulse dust collector 110 through the wind network duct. The air outlet of the screening pulse dust collector 110 is connected to the inlet of the screening centrifuge fan 111, and the outlet of the screening centrifuge fan 111 is connected to the atmosphere.

[0034] The corn slurry output pipe of the starch workshop is connected to the inlet of the corn slurry storage tank 205, the bottom outlet of the corn slurry storage tank 205 is connected to the slurry adding port of the slurry adding mixer 201 through the delivery pump 206 and the corn slurry pipe, the discharge port of the slurry adding mixer 201 is connected to the static bed 202, the discharge port of the static bed 202 is connected to the inlet of the belt conveyor 204 through the discharge machine 203, the outlet of the belt conveyor 204 is connected to the inlet of the screw feeder 301, and the outlet of the screw feeder 301 is connected to the inlet of the drum dryer 302.

[0035] The outlet of the blower 303 is connected to the air inlet of the heat exchanger 304, the air outlet of the heat exchanger 304 is connected to the air inlet of the drum dryer 302, the hot side inlet of the heat exchanger 304 is connected to the steam pipe G1, and the hot side outlet of the heat exchanger 304 is connected to the condensate pipe G2.

[0036] The air outlet of the drum dryer 302 is connected to the air inlet of the first brake dragon 305. A fan 306 is installed at the bottom of the first brake dragon 305. The top air outlet of the first brake dragon 305 is connected to the inlet of the first-level drying fan 307. The outlet of the first-level drying fan 307 is connected to the lower air inlet of the washing tower 308.

[0037] The outlet of the drum dryer 302 is connected to the inlet of the drum dryer discharging auger 310, the outlet of the drum dryer discharging auger 310 is connected to the inlet of the tube bundle dryer 401 through a slide pipe, the hot air outlet of the tube bundle dryer 401 is connected to the inlet of the dust removal brake dragon 406, and a blower 407 is installed at the bottom of the dust removal brake dragon 406. The air outlet of the dust removal brake dragon 406 is connected to the heat source inlet of the evaporator through a drying centrifugal fan.

[0038] The outlet of the tube bundle dryer 401 is connected to the inlet of the cooler 403 through the second elevator 402, the upper air outlet of the cooler 403 is connected to the inlet of the pulse dust collector 409, the top outlet of the pulse dust collector 409 is connected to the inlet of the induced draft fan 410, and the outlet of the induced draft fan 410 is connected to the atmosphere.

[0039] The discharge port of the cooler 403 is connected to the inlet of the pulverizer 405, and the outlet of the pulverizer 405 is connected to the pulp adding and packaging unit 600 through an air conveying pipeline.

[0040] The working process and some process parameters of the corn germ meal pulping and drying system are as follows:

[0041] Corn germ meal from the oil mill is conveyed to the vibrating screen 102 through the scraper conveyor 101, the screened material goes to the first elevator 105, and the screened small-particle germ meal enters the small-particle discharging conveyor 103. The small-particle germ meal with a higher protein content in the germ meal is separated through the screening of the vibrating screen 102, and is packaged by the germ meal packaging unit 500 and sold separately, and the remaining germ meal enters the buffer bin 106.

[0042] The first outlet of the small particle discharging conveyor 103 is controlled by the frequency conversion of the small particle discharging air lock 104, and the remaining material also enters the first elevator 105. According to the production situation, the frequency of the small particle discharging air lock 104 is adjusted to control the amount of slurry added to the germ meal. At the same time, the germ meal with low protein content is given priority to be slurried.

[0043] The first elevator 105 sends the germ meal to the buffer bin 106 for buffering, and the output is controlled by the variable frequency auger 107, and the germ meal is evenly fed to the pulping mixer 201.

[0044] The roots blower 108 and the positive pressure air shut-off device 109 deliver the germ meal into the pulping mixer 201. The system is equipped with a screening pulse dust collector 110, a screening centrifugal fan 111 and other dust removal systems.

[0045] The germ meal is sent to the pulp mixer 201, while the corn pulp from the starch workshop enters the corn pulp storage tank 205, and is evenly sent to the addition port of the pulp mixer 201 by the delivery pump 206. The addition ratio of corn pulp to germ meal is 1:2.5. The moisture content of the mixed pulp germ meal is about 46%, and it is sent to the static bed 202 for 12 hours to allow the corn pulp and germ meal to fully react, and at the same time, the lactic acid in the corn pulp is naturally fermented to improve the product nutritional factors and product quality. The discharging machine 203 sends the germ meal in the static bed 202 to the inlet end of the belt conveyor 204, and the belt conveyor 204 transports it to the drying section.

[0046] The germ meal from the belt conveyor 204 is sent to the drum dryer 302 by the screw feeder 301 for drying. The heat source of the drum dryer 302 is air, and the hot air is sent to the drum dryer 302 by the blower 303 and the heat exchanger 304. The pulped germ meal with a moisture content of 46% is reduced to 38% by drum drying. The drum heat source is steam or natural gas, the inlet air temperature is greater than 160°C, and the exhaust gas temperature is 50°C.

[0047] The dried tail gas enters the first cyclone 305 for dust removal and is discharged by the air lock 306. The primary drying fan 307 sends the tail gas to the washing tower 308 for washing. The washed tail gas is discharged into the atmosphere, and the washing circulation pump 309 is used for internal circulation of the washing tower 308. The pulped germ meal after primary drying is sent to the secondary drying section by the drum drying discharge auger 310.

[0048] The moisture content of the pulped germ meal discharged from the drum is 38%. It is sent to the tube bundle dryer 401 by the drum drying discharge auger 310 to be dried to 12% moisture. The steam of the tube bundle dryer 401 enters from the discharge end, and the condensed water is discharged from the feed end. The finished product after drying in the tube bundle dryer 401 does not need to be returned. It enters the second elevator 402 and is sent to the cooler 403 for cooling. The cooler 403 is equipped with a pulse dust collector 409, an induced draft fan 410 and a cooling air duct. The cooled germ is evenly fed into the pulverizer 405 by the feeder 404 for pulverization. The pulverized pulped germ meal enters the pulped packaging unit 600 for packaging. The tube bundle dryer 401 is equipped with a dust removal brake 406, a wind lock 407, and a drying centrifugal fan 408. The treated tail gas can be used as a heat source for the evaporator of the front-end equipment.

[0049] The above description is only the preferred feasible embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model, but does not limit the scope of patent protection of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. In addition to the above embodiments, the utility model can also have other implementation modes without departing from the spirit and scope of the utility model. The utility model will also have various changes and improvements. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents. The technical features not described in the utility model can be achieved by or using existing technologies, which will not be repeated here.

Claims

1. A corn germ meal pulping and drying system, comprising a scraper conveyor connected to a corn germ meal outlet in a leaching workshop, characterized in that: The outlet of the scraper conveyor is connected to the inlet of the vibrating screen, the outlet above the vibrating screen is connected to the lower inlet of the first elevator, the outlet below the vibrating screen is connected to the inlet of the small particle discharging conveyor, and the middle outlet of the small particle discharging conveyor is connected to the germ meal packaging unit through an air lock; The end outlet of the small particle discharging conveyor is also connected to the lower inlet of the first elevator, the upper outlet of the first elevator is connected to the inlet of the buffer bin, the outlet of the buffer bin is connected to the feed port of the pulping mixer through an air conveying pipe, the pulping port of the pulping mixer is connected to the corn pulp pipe, the discharge port of the pulping mixer is connected to the static bed, the discharge port of the static bed is connected to the inlet of the belt conveyor through the discharging machine, the outlet of the belt conveyor is connected to the inlet of the drum dryer, the outlet of the drum dryer is connected to the inlet of the tube bundle dryer through the drum drying discharging auger, the outlet of the tube bundle dryer is connected to the inlet of the cooler through the second elevator, the discharge port of the cooler is connected to the inlet of the crusher, and the outlet of the crusher is connected to the pulping packaging unit.

2. The corn germ meal pulping and drying system according to claim 1, characterized in that: The corn slurry output pipe of the starch workshop is connected to the inlet of the corn slurry storage tank, and the bottom outlet of the corn slurry storage tank is connected to the slurry adding port of the slurry adding mixer through a delivery pump.

3. The corn germ meal pulping and drying system according to claim 1, characterized in that: The hot air outlet of the tube bundle dryer is connected to the inlet of the dust removal cyclone, and the air outlet of the dust removal cyclone is connected to the heat source inlet of the evaporator through a drying centrifugal fan.

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