Ethanol recovery device in D-ribose production

Abstract

The utility model discloses an ethanol recovery device in D-ribose production. The ethanol recovery device comprises a tank body, wherein an air outlet pipe and an air inlet pipe are respectively arranged at the upper end and the lower end of the tank body; a plurality of spraying units which are vertically spaced are arranged in the tank body; each spraying unit comprises an annular water tank, a spraying cover, a gas collecting cover and a spray head; the spray head of the lowermost spraying unit is over against the upper part of the air inlet pipe; the air outlet of the uppermost spraying unit is over against the lower part of a spray head fixedly arranged at the top of the tank body; according to the ethanol tail gas washing device, ethanol tail gas can be washed for multiple times, ethanol is absorbed more sufficiently, gas flows smoothly, energy consumption is reduced, and the ethanol tail gas washing device has the effects of saving water and avoiding ethanol waste.

Description

Technical Field

[0001] This utility model belongs to the field of bioengineering equipment technology, and relates to an ethanol recovery device in D-ribose production. Background Technology

[0002] In D-ribose production, the fermentation broth is further concentrated and crystallized to obtain a mixture of mother liquor and crystallization liquor. The concentration process uses vacuum drying to remove volatile gases, which contain a large amount of ethanol. Direct emission of these gases pollutes the environment and is wasteful. To recover this ethanol gas, a wet scrubbing method is typically used, as illustrated in patent CN 222219110U, "Ethanol Tail Gas Recirculation and Recovery Device in D-ribose Production". The drawbacks of this type of device are as follows: First, it is difficult to ensure sufficient contact between ethanol and water through a single spray, resulting in incomplete ethanol absorption. Even with absorbent packing in the spray area, ethanol gas can still pass through the gaps between the packing, making ethanol leakage difficult to avoid. Second, the absorbent packing creates air resistance. Since the ethanol exhaust gas is drawn in by a vacuum pump, the gas flow and pressure are very unstable. Excessive airflow resistance increases the load on the pipeline system, requiring additional fans and increasing energy consumption. Third, in order to improve absorption efficiency, this patent recycles and cools the spray water. However, the recycled spray water contains a high concentration of ethanol, and the outlet pipe is located above the nozzle, making it easy to discharge water droplets containing high concentrations of ethanol, resulting in significant ethanol waste. Utility Model Content

[0003] To overcome the shortcomings in the prior art, this utility model provides an ethanol recovery device for D-ribose production. The purpose is to improve washing efficiency by increasing the number of spray cleaning cycles so that ethanol gas and water can be mixed more thoroughly, thereby increasing the absorption efficiency of ethanol. It also aims to reduce exhaust resistance to prevent the discharge of water vapor containing high concentrations of ethanol and reduce ethanol waste.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an ethanol recovery device for D-ribose production, comprising a vertically arranged tank; an outlet pipe and an inlet pipe are respectively provided at the upper and lower ends of the tank; the tank contains multiple vertically spaced spray units; each spray unit includes an annular water tank, a spray hood, a gas collecting hood, and a nozzle; the annular water tank is fixedly connected to the inner wall of the tank; the gas collecting hood is located above the annular water tank and is fixedly connected to the tank, with an outlet at its upper end, and its lower edge extending downward and penetrating into the annular water tank, leaving a gap with the bottom surface of the annular water tank; The spray hood is located inside the through hole in the middle of the annular water tank and is fixedly connected to the tank body, and covers the air outlet of another spray unit directly above it; a spray head is fixedly connected in the middle of the spray hood, and the spray head faces the air outlet directly below; one end of the water pipe is connected to the spray head, and the other end extends out of the tank body and is fixedly connected to the tank body; the spray head of the lowermost spray unit faces directly above the air inlet pipe; the air outlet of the uppermost spray unit faces directly below the spray head fixed at the top of the tank body; a float valve is provided at the bottom of the tank body to control the water level at the bottom of the tank body to be lower than the top of the air inlet pipe.

[0005] As a further optimization, multiple support rods are evenly distributed around the circumference of the air outlet of the gas collecting hood; one end of each support rod is fixedly connected to the gas collecting hood, and the other end is fixedly connected to the inner wall of the tank.

[0006] As a further optimization, the outer wall of the air outlet of the air collection hood is fixedly connected with multiple connecting seats, and the connecting seats are connected to the support rod by bolts.

[0007] As a further optimization, the middle part of the water pipe passes through a pre-set through hole in the gas collection hood.

[0008] As a further optimization, there are multiple tanks, and the air inlet and outlet pipes of two adjacent tanks are connected by a series pipe to connect the multiple tanks in series to form a tank assembly with an upstream and downstream relationship. The air inlet pipe of the upstream tank is used to supply air to the tank assembly, and the air outlet pipe of the downstream tank is used to exhaust air from the tank assembly. The drain port of the float valve of each tank is connected to a water collection tank outside the tank. The input end of the water pump is connected to the water collection tank, and its output end is connected to a water supply pipe. The end of the water supply pipe is divided into multiple branch pipes, and the end of each branch pipe is connected to the water pipe of the upstream tank to supply the upstream tank with water discharged from the downstream tank. The multiple water pipes of the downstream tank are connected to a clean water pipe. The water pump connected to the clean water pipe is connected to a clean water tank through a suction pipe to supply clean water to the tank assembly. The upstream water collection tank is connected to a drain pipe to discharge the water absorbed by the tank assembly.

[0009] Compared with existing technologies, the advantages of this invention are: the multiple spray units spaced apart in this device allow the ethanol exhaust gas to undergo multiple washes, resulting in more thorough ethanol absorption. Simultaneously, the gas experiences minimal flow resistance, allowing for smooth flow without the need for additional fans, thus reducing energy consumption. The highest concentration of ethanol-water is discharged from the bottom of the tank, conserving water, while the ethanol content in the gas discharged from the top of the tank is the lowest, preventing waste. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0011] Figure 2 This is a partial cross-sectional schematic diagram of Embodiment 1 of the present invention;

[0012] Figure 3 for Figure 2 Cross-sectional view at point AA;

[0013] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model.

[0014] The correspondence between the technical features in the figure and the reference numerals is as follows: Tank 1; Air outlet pipe 11; Air inlet pipe 12; Annular water tank 2; Through hole 21; Spray hood 3; Gas collection hood 4; Air outlet 41; Support rod 42; Connecting seat 43; Bolt 44; Penetrating hole 45; Spray head 5; Water pipe 51; Float valve 6; Series pipe 7; Water collection tank 8; Water pump 81; Water supply pipe 82; Branch pipe 83; Drainage pipe 84; Clean water pipe 9; Suction pipe 91; Clean water tank 92. Detailed Implementation

[0015] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some preferred embodiments of this utility model, and not all embodiments. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of this utility model, and are not intended to limit the protection scope of this utility model.

[0016] Example: Please refer to Figure 1-3This utility model provides the following technical solution: an ethanol recovery device in D-ribose production, comprising a vertically arranged tank 1; the upper and lower ends of the tank 1 are respectively provided with an outlet pipe 11 and an inlet pipe 12; the tank 1 contains a plurality of vertically spaced spray units; each spray unit includes an annular water tank 2, a spray hood 3, a gas collecting hood 4, and a nozzle 5; the annular water tank 2 is fixedly connected to the inner wall of the tank 1; the gas collecting hood 4 is located above the annular water tank 2 and is fixedly connected to the tank 1, with an outlet 41 at its upper end, and its lower edge extending downward and penetrating into the annular water tank 2, leaving a gap with the bottom surface of the annular water tank 2; the spray hood 3 is located above the annular water tank 2 and is fixedly connected to the tank 1, with an outlet 41 at its upper end, and its lower edge extending downward and penetrating into the annular water tank 2, leaving a gap with the bottom surface of the annular water tank 2; the spray hood 3 is located above the annular water tank 2 and is fixedly connected to the tank 1. The annular water tank 2 has a through hole 21 in the middle, which is fixed to the tank body 1 and covers the air outlet 41 of another spray unit directly above it; the spray hood 3 has a spray head 5 fixed in the middle, which faces the air outlet 41 directly below; one end of the water pipe 51 is connected to the spray head 5, and the other end extends out of the tank body 1 and is fixed to the tank body 1; the spray head 5 of the lowest spray unit faces the air inlet pipe 12 directly above it; the air outlet 41 of the highest spray unit faces the spray head 5 fixed at the top of the tank body 1 directly below it; the tank body 1 has a float valve 6 at the bottom to control the water level at the bottom of the tank body 1 to be lower than the top of the air inlet pipe 12.

[0017] In operation, the bottom air inlet pipe 12 inputs ethanol exhaust gas into the tank 1. The ethanol exhaust gas enters the spray hood 3 of the bottom spray unit and comes into contact with the water mist sprayed from the nozzle 5. The gas then bypasses the spray hood 3, passes through the through hole 21 in the middle of the annular water tank 2, and enters the gas collection hood 4 to continue upwards, with water droplets falling to the bottom of the tank 1. When the gas exits from the outlet 41 of the gas collection hood 4, it enters the spray hood 3 of another spray unit, again coming into contact with the water mist sprayed from the nozzle 5 for washing. This process continues, and the ethanol is discharged from the outlet pipe 11 after multiple washings, increasing the contact opportunities between the ethanol and the water mist, resulting in more complete absorption of the ethanol. At the same time, the gas has little flow resistance and can flow smoothly without the need for an additional fan, reducing energy consumption. On the other hand, the water droplets sprayed from the upper spray unit flow into the annular water tank 2 under the action of the gas collection hood 4. When the water in the annular water tank 2 is full and overflows, it falls into the lower annular water tank 2, descending step by step until it reaches the bottom of the tank 1. The bottom of tank 1 is equipped with a float valve 6, including a float and a plug connected to its lower end. The plug is inserted into a pre-set drain port at the bottom of the tank. When the water level rises to the preset position, the float pulls the plug upward, discharging the water and preventing water from flowing back into the air inlet pipe 12. Therefore, after multiple washes, the ethanol concentration is highest at the bottom of tank 1 and lowest in the uppermost annular water tank 2. The first thing discharged is high-concentration ethanol water, which saves water. Secondly, the water overflowing from the upper annular water tank 2 can still come into contact with the gas during dripping, further improving the ethanol absorption efficiency. Moreover, after multiple washes, the ethanol content in the gas at the top is very low, so even if it is discharged, it will not cause significant waste.

[0018] Regarding the method of fixing the gas collecting hood 4 within the tank body 1, for example, multiple support rods 42 are evenly distributed around the circumference of the gas outlet 41 of the gas collecting hood 4; one end of each support rod 42 is fixedly connected to the gas collecting hood 4, and the other end is fixedly connected to the inner wall of the tank body 1. It can be seen that the support rod 42 has a small obstruction area, provides stable support, and will not obstruct the upward flow of air or the downward flow of water. Both the support rod 42 and the annular water tank 2 can be fixedly connected to the tank body 1 by welding.

[0019] For ease of maintenance, the tank body 1 should be equipped with a manhole. However, for even greater convenience, multiple connecting seats 43 are fixedly connected to the outer wall of the air outlet 41 of the gas collection hood 4, and the connecting seats 43 are connected to the support rod 42 by bolts 44.

[0020] Similarly, for ease of maintenance, the nozzle 5 and water pipe 51 should be connected via a detachable connector. After removing the connector, the water pipe 51 can be pulled out of the tank 1. The middle of the water pipe 51 passes through a pre-set through hole 45 in the gas collecting hood 4. Thus, in addition to connecting to the tank 1, the water pipe 51 is also connected to the gas collecting hood 4 via the through hole 45, avoiding a cantilever structure. Simultaneously, the spray hood 3 is also fixed to the tank 1 via the water pipe 51, which serves as the fixed foundation for the spray hood 3. The water pipe 51 is both a functional component and a supporting component. After the water pipe 51 is pulled out, the spray hood 3 is movable and detachable.

[0021] The advantage of this embodiment is that the multiple spray units arranged at intervals allow the ethanol exhaust gas to undergo multiple washes, resulting in more thorough absorption of the ethanol. Simultaneously, the gas experiences minimal flow resistance, allowing for smooth flow without the need for additional fans, thus reducing energy consumption. The bottom of tank 1 discharges the highest concentration of ethanol-water, conserving water, while the top of tank 1 discharges the gas with the lowest ethanol content, avoiding waste.

[0022] Example 2, please refer to Figure 1-4 .

[0023] The difference between this embodiment and Embodiment 1 is that there are multiple tanks 1, and the air inlet pipes 12 and air outlet pipes 11 of two adjacent tanks 1 are connected by a series pipe 7 to connect multiple tanks 1 in series to form a tank assembly with an upstream and downstream relationship; the air inlet pipe 12 of the upstream tank 1 is used to supply air to the tank assembly, and the air outlet pipe 11 of the downstream tank 1 is used to exhaust air from the tank assembly; the drain port of the float valve 6 of each tank 1 is connected to a water collection tank 8 outside the tank 1; the input end of the water pump 81 is connected to the water collection tank 8, and its output end... A water supply pipe 82 is connected, and the end of the water supply pipe 82 is divided into multiple branch pipes 83. The end of each branch pipe 83 is connected to the water pipe 51 of the upstream tank 1, so as to use the water discharged from the downstream tank 1 to supply the upstream tank 1. The multiple water pipes 51 of the downstream tank 1 are connected to the clean water pipe 9. The water pump 81 connected to the clean water pipe 9 is connected to the clean water tank 92 through the suction pipe 91, so as to supply clean water to the tank assembly. The upstream water collection tank 8 is connected to the drain pipe 84, so as to discharge the water after the tank assembly absorbs ethanol. At this time, there are many tanks 1 connected in series. A fan can be connected at the downstream air outlet pipe 11 to promote airflow. It should be noted that before the water pump 81 is started, the water collection tank 8 connected to it should be filled with water to avoid dry start of the water pump 81.

[0024] Therefore, the ethanol tail gas flows through multiple tanks 1, further increasing the number of washing cycles and improving the ethanol absorption efficiency, resulting in cleaner ethanol absorption. Simultaneously, using downstream water to wash the ethanol tail gas from upstream tank 1 reduces wastewater discharge, further conserving water.

[0025] The parts of this utility model not described in detail are prior art; for those skilled in the art, the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. An ethanol recovery device for D-ribose production, comprising a vertically arranged tank (1); the tank (1) is provided with an outlet pipe (11) and an inlet pipe (12) at its upper and lower ends, respectively; characterized in that: The tank (1) is provided with multiple vertically spaced spray units; each spray unit includes an annular water tank (2), a spray hood (3), a gas collection hood (4), and a nozzle (5); the annular water tank (2) is fixedly connected to the inner wall of the tank (1); the gas collection hood (4) is located above the annular water tank (2) and is fixedly connected to the tank (1), with an air outlet (41) at its upper end, and its lower edge extending downward and penetrating into the annular water tank (2), and is connected to the annular water tank (1). A gap is left on the bottom surface of the water tank (2); the spray hood (3) is located in the through hole (21) in the middle of the annular water tank (2) and is fixedly connected to the tank body (1), and covers the air outlet (41) of another spray unit directly above it; the spray hood (3) is fixedly connected to the spray nozzle (5) in the middle, and the spray nozzle (5) faces the air outlet (41) directly below; one end of the water pipe (51) is connected to the spray nozzle (5), and the other end extends out of the tank body (1) and is fixedly connected to the tank body (1); The nozzle (5) of the lowest spray unit is directly above the air inlet pipe (12); the air outlet (41) of the highest spray unit is directly below the nozzle (5) fixed on the top of the tank (1); a float valve (6) is provided at the bottom of the tank (1).

2. The ethanol recovery device in D-ribose production according to claim 1, characterized in that: Multiple support rods (42) are evenly distributed around the air outlet (41) of the gas collection hood (4); one end of each support rod (42) is fixedly connected to the gas collection hood (4), and the other end is fixedly connected to the inner wall of the tank (1).

3. The ethanol recovery device in D-ribose production according to claim 2, characterized in that: The outer wall of the air outlet (41) of the air collection hood (4) is fixed with a plurality of connecting seats (43), and the connecting seats (43) are connected to the support rod (42) by bolts (44).

4. The ethanol recovery device in D-ribose production according to claim 2, characterized in that: The water pipe (51) passes through the pre-set through hole (45) of the gas collecting hood (4) in the middle.

5. The ethanol recovery device in D-ribose production according to claim 1, characterized in that: There are multiple tanks (1), and the air inlet pipe (12) and air outlet pipe (11) of two adjacent tanks (1) are connected by a series pipe (7) to connect multiple tanks (1) in series to form a tank assembly with an upstream and downstream relationship; The drain outlet of the float valve (6) of each tank (1) is connected to a water collection tank (8) outside the tank (1); the input end of the water pump (81) is connected to the water collection tank (8), and its output end is connected to the water supply pipe (8251). The end of the water supply pipe (8251) is divided into multiple branch pipes (83), and the end of each branch pipe (83) is connected to the water pipe (51) of the upstream tank (1). The downstream tank (1) has multiple water pipes (51) connected to a clean water pipe (9); the clean water pipe (9) is connected to a water pump (81) which is connected to a clean water tank (92) via a suction pipe (91); the upstream water collection tank (8) is connected to a drain pipe (84).

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