A casein production line with waste heat drying box

Abstract

The utility model provides a kind of case of drying cheese production line with waste heat, it is characterized in that, the production line sequentially includes: heating tank for heating milk, skim milk separation device for separating heated milk into emulsion and fat, curd tank for mixing and stirring milk and acid solution to form casein, filter pressing dewatering device for extruding and dewatering casein, granulating crushing device for breaking up blocky casein after dewatering, air drying device for drying granular wet casein;Wherein, waste heat drying device is provided between granulating crushing device and air drying device, at least one set of boiler system is prepared outside the production line to provide heat source for heating tank and air drying device, and the production line is mainly used for production.

Description

Technical Field

[0001] This utility model relates to a casein production line, and more particularly to a casein production line with a waste heat drying box. Background Technology

[0002] Casein, also known as casein protein, is a major protein extracted from milk. Its production methods are mainly divided into enzymatic methods and acid methods, which are the primary methods used for large-scale industrial production.

[0003] The main steps of this method are: heating, degreasing, acid addition and flocculation, pressure filtration, crushing and drying. Among them, the heating and drying steps require a large supply of heat. In actual production, boilers are usually used to provide high-temperature steam as a heat source. After the high-temperature steam releases heat in the heating and drying steps, it is converted into condensate at 70-90°C and flows back to the boiler's feedwater tank. This process will cause some heat to be wasted with the return of the condensate. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model proposes a casein production line with a waste heat drying box.

[0005] The production line, in sequence according to the process flow, includes: a heating tank for heating milk; a defatting separator for separating heated milk into emulsion and fat; a curdling tank for mixing milk with acid to form casein; a filter press for dehydrating casein; a granulation and crushing device for breaking up dehydrated blocky casein; and a blower drying device for drying granular wet casein. A waste heat drying device is provided between the granulation and crushing device and the blower drying device. At least one boiler system is installed outside the production line to provide a heat source for the heating tank and the blower drying device. The waste heat drying device utilizes the surplus heat from the heating tank and the blower drying device to pre-dry the granular casein.

[0006] Furthermore, the boiler system transfers heat to the heating tank and the blower drying device through heat exchanger one and heat exchanger two, respectively. The heating tank and the blower drying device are equipped with heat exchanger one and heat exchanger two, respectively. The boiler system is connected to heat exchanger one and heat exchanger two through high-temperature steam pipes, respectively. The part of the high-temperature steam pipe that passes through heat exchanger one or heat exchanger two is a condensation waste heat supply water pipe. Heat exchanger one is connected to the heating tank through a heat exchange pipe, and heat exchanger two is connected to the blower drying device through a heat exchange pipe.

[0007] Furthermore, the waste heat drying device is connected to heat exchanger one and heat exchanger two via a condensing waste heat supply water pipe. A high-temperature pump is installed on the condensing waste heat supply water pipe. The part of the condensing waste heat supply water pipe that passes through the waste heat drying device is a return water pipe. The return water pipe is connected to the boiler system. The high-temperature pump drives the hot water in the condensing waste heat supply water pipe to flow to the waste heat drying device.

[0008] Furthermore, the waste heat drying device includes: a lower waste water tank, an upper drying box, and an air supply pipeline located at the top of the drying box; wherein, the bottom of the drying box is provided with a discharge port that connects to the blower drying device, and the top of the drying box is provided with a feed port that connects to the granulation and crushing device.

[0009] Furthermore, the waste heat tank includes: a water bath sealed chamber located in the middle, an insulation layer wrapped around the bottom and sides of the water bath sealed chamber, the water bath sealed chamber being filled with a liquid heat-conducting medium that exchanges heat with the drying chamber, a condensing waste heat supply pipe passing through the water bath sealed chamber in the form of a U-shaped coil, and connected to a return water pipe at the other end of the water bath sealed chamber, the condensing waste heat supply pipe transferring heat to the liquid heat-conducting medium in the water bath sealed chamber, after the liquid heat-conducting medium heats up, transferring heat upwards to the drying chamber, and the insulation layer preventing the heat in the water bath sealed chamber from diffusing into the environment.

[0010] Furthermore, to prevent casein from caking when passing through the drying chamber, the drying chamber and the waste water tank are set at an angle. The drying chamber is equipped with several mixing chambers arranged along the direction from the inlet to the outlet, and there are connecting channels between the mixing chambers. The mixing chambers are equipped with three-bladed impellers for stirring the casein. The upper surface of the mixing chamber is equipped with a top cover. The motor and belt drive mechanism for driving the three-bladed impellers to rotate are installed on the top cover. The rotating three-bladed impellers continuously stir the casein during the drying process.

[0011] Furthermore, the air supply pipeline includes: a main air supply pipe arranged along the direction from the inlet to the outlet, and several branch air supply pipes extending from the main air supply pipe toward the mixing chamber. Each branch air supply pipe is equipped with a branch solenoid valve, wherein the end of each branch air supply pipe passes through the top cover and extends into each mixing chamber.

[0012] Furthermore, the end of the air supply branch pipe has a bend towards the discharge port, which is used to blow casein from the connecting channel to the mixing chamber below.

[0013] The technical effects of this utility model are as follows: First, it achieves high efficiency and energy saving, significantly reducing energy consumption. The core improvement of this utility model lies in the creative addition of a waste heat drying device, which is integrated between the granulation and crushing device and the blower drying device. This device recovers the waste heat from the 70-90℃ condensate generated by the boiler system after providing heat energy to the heating tank and the blower drying device, and pre-dries the crushed wet casein granules. This significantly reduces the moisture content of the material entering the blower drying device, thereby significantly reducing the energy consumption of the blower drying device, realizing the cascade utilization of energy, and achieving significant energy saving. Second, it improves the comprehensive utilization efficiency of thermal energy. By connecting the condensate waste heat supply pipe to the waste heat drying device and using a high-temperature pump to drive the circulation, the low-grade thermal energy that might otherwise be wasted is effectively utilized in the production process. The U-shaped coil design and liquid heat transfer medium in the waste water tank ensure that heat is efficiently and evenly transferred to the drying box, and the insulation layer further reduces heat loss, resulting in high comprehensive utilization efficiency of the system's thermal energy. Third, ensuring pre-drying quality and preventing material caking; the drying chamber adopts an inclined multi-mixing chamber design, with each mixing chamber equipped with a motor-driven three-blade impeller that continuously mixes casein granules, ensuring uniform heating and full contact with the heated chamber body. This effectively prevents caking that may occur due to static placement during pre-drying, ensuring uniform pre-drying and product quality. Fourth, optimizing material flow and improving automation; the design of the air supply pipeline, especially the directional bends at the ends of the air supply branch pipes, not only allows air to be introduced when needed to remove humidified air, but also effectively blows the material in the connecting channel to the next mixing chamber. This ensures that the material flows smoothly and controllably forward under the action of gravity and airflow, reducing the risk of blockage and making the entire pre-drying process continuous and stable. Attached Figure Description

[0014] Figure 1 This is a layout diagram of the production line in this utility model;

[0015] Figure 2 This is a perspective view of the waste heat drying device in this utility model;

[0016] Figure 3 This is a front view of the residual hot water tank in this utility model.

[0017] In the diagram, 1. Heating tank, 2. Degreasing and separation device, 3. Curd tank, 4. Filter press and dewatering device, 5. Granulation and crushing device, 6. Blower drying device, 7. Boiler system, 8. Waste heat drying device, 9. Waste water tank, 10. Drying box, 11. Gas supply pipeline, 71. Heat exchanger one, 72. Heat exchanger two, 73. High temperature pump, 75. High temperature steam pipe, 76. Condensate waste heat supply water pipe, 77. Return water pipe, 91. Water bath sealed chamber, 92. Insulation layer, 101. Feed inlet, 102. Discharge outlet, 103. Mixing chamber, 104. Three-blade impeller, 105. Motor, 106. Belt drive mechanism, 107. Top cover, 108. Connecting channel, 110. Main gas supply pipe, 111. Branch gas supply pipe, 112. Branch solenoid valve. Detailed Implementation

[0018] The following is combined Figures 1 to 3 The embodiments of this utility model will be described in detail below.

[0019] Figure 1 The layout of the casein production line is illustrated. The production line includes, in sequence, the following components according to the process flow: a heating tank 1 for heating milk; a defatting separator 2 for separating the heated milk into emulsion and fat; a curdling tank 3 for mixing and stirring milk with acid to form casein; a filter press dehydration device 4 for pressing and dehydrating casein; a granulation and crushing device 5 for breaking up the dehydrated blocky casein; and a blower drying device 6 for drying the granular wet casein. A waste heat drying device 8 is provided between the granulation and crushing device 5 and the blower drying device 6. At least one boiler system 7 is provided outside the production line to provide a heat source for the heating tank 1 and the blower drying device 6.

[0020] Heating tank 1 and blower drying device 6 are respectively equipped with heat exchanger 1 71 and heat exchanger 2 72. Boiler system 7 is connected to heat exchanger 1 71 and heat exchanger 2 72 respectively through high temperature steam pipe 75. The part of high temperature steam pipe 75 that passes through heat exchanger 1 71 or heat exchanger 2 72 is condensate waste heat supply water pipe 76. Heat exchanger 1 71 is connected to heating tank 1 through heat exchange pipe, and heat exchanger 2 72 is connected to blower drying device 6 through heat exchange pipe.

[0021] The waste heat drying device 8 is connected to the heat exchanger 71 and the heat exchanger 72 via a condensing waste heat water supply pipe 76. A high-temperature pump 73 is installed on the condensing waste heat water supply pipe 76. The part of the condensing waste heat water supply pipe 76 that passes through the waste heat drying device 8 is a return water pipe 77, which is connected to the boiler system 7.

[0022] Figure 2The specific structure of the waste heat drying device is illustrated. The waste heat drying device 8 includes: a lower waste water tank 9, an upper drying box 10, and an air supply pipe 11 located on the upper part of the drying box 10. The bottom of the drying box 10 is provided with a discharge port 102 that is connected to the blower drying device 6, and the top of the drying box 10 is provided with a feed port 101 that is connected to the granulation and crushing device 5.

[0023] The drying chamber 10 and the waste water tank 9 are inclined. The drying chamber 10 contains several mixing chambers 103 arranged along the direction from the inlet 101 to the outlet 102. A connecting channel 108 is provided between the mixing chambers 103. Each mixing chamber 103 contains a three-bladed impeller 104 for stirring casein. A top cover 107 is provided on the upper surface of each mixing chamber 103. A motor 105 and a belt drive mechanism 106 for driving the three-bladed impeller 104 are installed on the top cover 107. The air supply pipeline 11 includes: along... A main air supply pipe 110 is provided from the inlet 101 to the outlet 102. Several branch air supply pipes 111 extend from the main air supply pipe 110 toward the mixing chamber 103. Each branch air supply pipe 111 is equipped with a branch solenoid valve 112. The end of each branch air supply pipe 111 passes through the top cover 107 and extends into each mixing chamber 103. The end of the branch air supply pipe 111 has a bend toward the outlet 102, which is used to blow casein in the connecting channel 108 to the mixing chamber 103 below.

[0024] Figure 3 The internal structure of the waste heat tank is illustrated. The hot water tank 9 includes: a water bath sealed chamber 91 located in the middle, an insulation layer 92 wrapped around the bottom and sides of the water bath sealed chamber 91, the water bath sealed chamber 91 is filled with a liquid heat-conducting medium that exchanges heat with the drying chamber 10, and a condensation waste heat supply pipe 76 passes through the water bath sealed chamber 91 in the form of a U-shaped coil and is connected to the return water pipe 77 at the other end of the water bath sealed chamber 91.

[0025] Working principle: Raw milk first enters the heating tank 1 for preheating. The preheated milk then passes through the defatting separator 2 to separate the fat, obtaining skim milk. The skim milk is mixed with acid in the curdling tank 3, causing casein to flocculate and precipitate, forming curd. The formed curd is then extruded into wet casein blocks by the filter press dehydration device 4. The wet casein blocks then enter the granulation and crushing device 5 to be pulverized into granular wet casein. The granular wet casein does not directly enter the high-energy-consuming blower drying device 6, but first falls into the feed inlet 101 of the waste heat drying device 8. After pre-drying in the waste heat drying device, the material is discharged from its outlet 102. At this point, the moisture content of the material has been significantly reduced, and it then enters the blower drying device 6 for final drying, obtaining the finished casein.

[0026] The high-temperature steam generated by boiler system 7 is delivered to heat exchanger 71 and heat exchanger 72 via high-temperature steam pipe 75, providing heat energy for heating tank 1 and forced-air drying device 6. After heat exchange, the high-temperature steam condenses into condensate at 70-90°C. This condensate, rich in waste heat, collects in condensate waste heat supply pipe 76. Driven by high-temperature pump 73, the condensate is pumped into waste water tank 9 at the lower level of waste heat drying device 8 through condensate waste heat supply pipe 76. Inside waste water tank 9, condensate waste heat supply pipe 76 passes through water bath sealed chamber 91 in the form of a U-shaped coil, efficiently transferring the waste heat it carries to the liquid heat transfer medium inside the chamber. The heated liquid heat transfer medium continuously and evenly conducts heat to the upper drying chamber 10, heating its chamber and providing a stable heat source for pre-drying.

[0027] Wet casein granules enter the first mixing chamber 103 of the inclined drying chamber 10 through the feed inlet 101. The three-bladed impeller 104 in each mixing chamber rotates continuously under the drive of the motor 105 and the belt drive mechanism 106, stirring and turning the casein granules so that they can fully and evenly contact the heated drying chamber 10, effectively evaporating the moisture and preventing the material from caking.

[0028] The branch solenoid valve 112 on the air supply line 11 allows gas to be supplied into the mixing chamber through the air supply branch pipe 111. The unique bend design at the end of the branch pipe, which faces the discharge port 102, not only allows gas to be blown in to help remove water vapor, but also generates a directional airflow to smoothly blow the material stuck in the connecting channel 108 to the next mixing chamber, ensuring the continuity of material flow and preventing blockage.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A casein production line with a waste heat drying chamber, characterized in that, The production line includes, in sequence, the following processes: a heating tank (1) for heating milk, a defatting separation device (2) for separating heated milk into emulsion and fat, a curdling tank (3) for mixing milk with acid to form casein, a filter press dehydration device (4) for pressing and dehydrating casein, a granulation and crushing device (5) for breaking up dehydrated blocky casein, and a blower drying device (6) for drying granular wet casein. Among them, a waste heat drying device (8) is provided between the granulation and crushing device (5) and the blower drying device (6), and at least one boiler system (7) is provided outside the production line to provide heat source for the heating tank (1) and the blower drying device (6).

2. The casein production line with a waste heat drying box according to claim 1, characterized in that, The heating tank (1) and the blower drying device (6) are respectively equipped with heat exchanger one (71) and heat exchanger two (72). The boiler system (7) is connected to heat exchanger one (71) and heat exchanger two (72) through high-temperature steam pipe (75). The part of the high-temperature steam pipe (75) that passes through heat exchanger one (71) or heat exchanger two (72) is a condensation waste heat supply water pipe (76). Heat exchanger one (71) is connected to heating tank (1) through heat exchange pipe, and heat exchanger two (72) is connected to blower drying device (6) through heat exchange pipe.

3. The casein production line with a waste heat drying box according to claim 2, characterized in that, The waste heat drying device (8) is connected to the condensing waste heat water supply pipe (76) between heat exchanger one (71) and heat exchanger two (72). A high temperature pump (73) is installed on the condensing waste heat water supply pipe (76). The part of the condensing waste heat water supply pipe (76) that passes through the waste heat drying device (8) is a return water pipe (77), and the return water pipe (77) is connected to the boiler system (7).

4. The casein production line with a waste heat drying box according to claim 3, characterized in that, The waste heat drying device (8) includes: a lower waste heat water tank (9), an upper drying box (10), and an air supply pipeline (11) located above the drying box (10). The bottom of the drying box (10) is provided with a discharge port (102) that is connected to the blower drying device (6), and the top of the drying box (10) is provided with a feed port (101) that is connected to the granulation and crushing device (5).

5. The casein production line with a waste heat drying chamber according to claim 4, characterized in that, The waste heat tank (9) includes: a water bath sealed chamber (91) located in the middle, an insulation layer (92) wrapped around the bottom and sides of the water bath sealed chamber (91), the water bath sealed chamber (91) is filled with a liquid heat-conducting medium that exchanges heat with the drying box (10), and a condensation waste heat supply pipe (76) passes through the water bath sealed chamber (91) in the form of a U-shaped coil and is connected to the return water pipe (77) at the other end of the water bath sealed chamber (91).

6. The casein production line with a waste heat drying chamber according to claim 4, characterized in that, The drying chamber (10) and the waste water tank (9) are inclined. The drying chamber (10) is provided with several mixing chambers (103) arranged along the direction from the feed inlet (101) to the discharge outlet (102). A connecting channel (108) is provided between the mixing chambers (103). The mixing chamber (103) is provided with a three-bladed impeller (104) for stirring casein. The upper surface of the mixing chamber (103) is provided with a top cover (107). A motor (105) for driving the three-bladed impeller (104) to rotate and a belt drive mechanism (106) are installed on the top cover (107).

7. The casein production line with a waste heat drying chamber according to claim 5, characterized in that, The gas supply pipeline (11) includes: a main gas supply pipe (110) arranged along the direction from the inlet (101) to the outlet (102), and a plurality of gas supply branch pipes (111) extending from the main gas supply pipe (110) toward the mixing chamber (103). Each gas supply branch pipe (111) is provided with a branch pipe solenoid valve (112). The end of each gas supply branch pipe (111) passes through the top cover (107) and extends into each mixing chamber (103).

8. The casein production line with a waste heat drying box according to claim 7, characterized in that, The end of the gas supply branch pipe (111) is located with a bend in the direction of the discharge port (102) for blowing casein in the connecting channel (108) to the mixing chamber (103) below.

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