Ethanol tail gas recycling device in D-ribose production

Abstract

The utility model relates to an ethanol tail gas recycling device in D-ribose production. The ethanol tail gas recycling device comprises an ethanol absorption tank and a spray absorption tower, a tower body of the spraying absorption tower is connected to the middle of the upper end of an ethanol absorption tank, the lower end of the tower body is communicated with the upper end of the ethanol absorption tank, ethanol tail gas is connected to the upper end of the ethanol absorption tank through a tail gas pipeline, the bottom of the ethanol absorption tank is connected with a recovery pipeline, a first electromagnetic valve is arranged on the recovery pipeline, and a centrifugal pump is installed on the recovery pipeline. The upper end of the spraying absorption tower is connected with an exhaust pipe; according to the device, tail gas containing ethyl alcohol is introduced into the spraying absorption tower under the suction force of the induced draft fan and is in full contact with sprayed cold water, ethyl alcohol in the tail gas is fully absorbed into the cold water and falls into the ethyl alcohol absorption tank below, the ethyl alcohol content in the cold water reaches 65% or above, ethyl alcohol recovery is achieved, meanwhile, ethyl alcohol VOC gas emission is reduced, and pollutant emission is reduced.

Description

Technical Field

[0001] The utility model relates to the field of D-ribose preparation, in particular to a recycling device for ethanol tail gas in D-ribose production. Background Art

[0002] D-ribose is widely used in medicine, food, feed, etc. In the pharmaceutical industry, D-ribose can be used in large quantities for the synthesis of riboflavin, and can also be used as a raw material for the production of nucleoside drug precursors, steroids, prostaglandins, structural analogs of VD, terpenoids, modified amino acids, chymosin inhibitors, etc. In recent years, D-ribose has been widely used in the synthesis of many new antiviral and anti-tumor drugs, such as metoprolol, pyrazofuranosine, F-methylinosine phosphate, halogenated chondroitin, and some drugs for the treatment of ovarian cancer.

[0003] During the production of D-ribose, the mother liquor concentration and double-cone vacuum pump circulating water links will emit a large amount of ethanol-containing tail gas, which will also cause ethanol VOC gas emissions. This will cause serious waste of raw materials and pollute the atmosphere, and needs to be improved. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a recycling and recovery device for ethanol tail gas in D-ribose production.

[0005] The technical scheme of the utility model is: a recycling and recovery device for ethanol tail gas in D-ribose production, comprising an ethanol absorption tank and a spray absorption tower; a tower body of the spray absorption tower is connected to the middle of the upper end of the ethanol absorption tank, the lower end of the tower body is communicated with the upper end of the ethanol absorption tank, the ethanol tail gas is connected to the upper end of the ethanol absorption tank through a tail gas pipeline, the size of the ethanol absorption tank is larger than that of the spray absorption tower, the bottom of the ethanol absorption tank is connected with a recovery pipeline, the recovery pipeline is provided with an electromagnetic valve A, and a centrifugal pump is installed on the recovery pipeline, and the upper end of the spray absorption tower is connected with an exhaust pipe.

[0006] Preferably, a plate heat exchanger is provided on one side of the ethanol absorption tank, and a circulation branch pipe is connected to the recovery pipe, and the circulation branch pipe is connected to the recovery pipe through a three-way joint. The circulation branch pipe is connected to the inlet on one side of the plate heat exchanger, and the outlet connected to the inlet is connected to the nozzle in the spray absorption tower through a spray pipe. Several nozzles can be evenly arranged by a bracket to increase the spraying area. The inlet on the other side of the plate heat exchanger is connected to a refrigerant input pipe, and the outlet connected to the inlet is connected to a refrigerant output pipe.

[0007] Preferably, the circulation branch pipe is installed with a solenoid valve B and a manual valve.

[0008] Preferably, a fan is installed on the exhaust pipe.

[0009] Preferably, an absorption filler is provided in the middle of the tower body of the spray absorption tower, and the filler is a polypropylene (PP) filler, a polyethylene (PE) filler or a ceramic ball filler.

[0010] Preferably, the tower bodies of the ethanol absorption tank and the spray absorption tower are both cylindrical, and the two are coaxially sealed and connected as a whole.

[0011] The beneficial technical effects of the utility model are:

[0012] (1) The utility model allows the exhaust gas containing ethanol to be drawn into a spray absorption tower under the suction force of an induced draft fan so as to fully contact the exhaust gas with sprayed cold water, so that the ethanol in the exhaust gas is fully absorbed into the cold water and falls into the ethanol absorption tank below. The ethanol content in the cold water reaches more than 65%, thereby realizing ethanol recovery and reducing ethanol VOC gas emissions and pollutant emissions.

[0013] (2) The utility model sends the ethanol absorption tank to the heat exchanger through the circulation branch pipe, and discharges it into the spray absorption tower through the spray branch pipe, circulates the ethanol-containing cold water to cool it and absorbs the ethanol gas in a circulation manner, which can be further concentrated into 95% ethanol, thereby improving the recovery effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a system schematic diagram of the utility model.

[0015] In the figure, 11. ethanol absorption tank, 12. spray absorption tower, 121. exhaust pipe, 122. fan, 123. nozzle, 124. absorption filler, 13. exhaust gas pipeline, 14. recovery pipeline, 141. solenoid valve A, 142. centrifugal pump, 15. plate heat exchanger, 151. refrigerant input pipe, 152. refrigerant output pipe, 161. circulation branch pipe, 162. spray pipeline, 163. solenoid valve B. DETAILED DESCRIPTION

[0016] Embodiment 1, as Figure 1As shown, a recycling and recovery device for ethanol tail gas in D-ribose production comprises an ethanol absorption tank 11 and a spray absorption tower 12, wherein the tower body of the spray absorption tower 12 is connected to the middle of the upper end of the ethanol absorption tank 11, and the lower end of the tower body is connected to the upper end of the ethanol absorption tank 11, and the ethanol tail gas is connected to the upper end of the ethanol absorption tank 11 through a tail gas pipeline 13, and the ethanol tail gas is introduced into the upper part of the ethanol absorption tank 11 through an induced draft fan 122, and then the ethanol gas enters the spray absorption tower 12 upward from the connecting through hole, and the bottom of the ethanol absorption tank 11 is connected with a recovery pipeline 14, and the recovery pipeline 14 is provided with an electromagnetic valve A 141, and a centrifugal pump 142 is installed on the recovery pipeline 14, and the cold water after absorbing ethanol in the ethanol absorption tank 11 is discharged through the centrifugal pump 142, and the upper end of the spray absorption tower 12 is connected with an exhaust pipe 121, and the exhaust pipe 121 is installed with a fan 122, and the tail gas after ethanol is absorbed is discharged from the exhaust pipe 121 under the action of the fan 122.

[0017] In this embodiment, an absorption filler 124 is provided in the middle of the tower body of the spray absorption tower 12, and the absorption filler 124 increases the absorption efficiency and effect of the ethanol tail gas and water in the tower body.

[0018] The tower bodies of the ethanol absorption tank 11 and the spray absorption tower 12 are both cylindrical, and the two are coaxially sealed and connected as a whole.

[0019] The working process of this embodiment is as follows: during the production of D-ribose, the mother liquor concentration and the double-cone vacuum pump circulating water links generate tail gas containing ethanol. Under the suction of the induced draft fan 122, the ethanol tail gas enters the ethanol absorption tank 11 from the tail gas pipeline 13, and then enters the spray absorption tower 12 upward. The nozzle on the top of the spray absorption tower 12 sprays water downward in atomization. The water and the ethanol tail gas are fully in contact in the packing, and the ethanol in the tail gas is fully absorbed into the cold water and falls into the ethanol absorption tank 11 below, thereby realizing ethanol recovery and reducing ethanol VOC gas emissions.

[0020] Embodiment 2, as Figure 1 As shown, on the basis of Example 1, a plate heat exchanger 15 is provided on one side of the ethanol absorption tank 11, and a circulation branch pipe 161 is connected to the recovery pipe 14, the circulation branch pipe 161 is connected to the inlet on one side of the plate heat exchanger 15, and the outlet communicated with the inlet is connected to the nozzle 123 in the spray absorption tower 12 through a spray pipe 162, the inlet on the other side of the plate heat exchanger 15 is connected to the refrigerant input pipe 151, and the outlet communicated with the inlet is connected to the refrigerant output pipe 152, and a solenoid valve B 163 is installed on the circulation branch pipe 161.

[0021] The working process and principle of this embodiment are as follows: close the solenoid valve A 141 and open the solenoid valve B 163, start the centrifugal pump 142, and the water after preliminary absorption of ethanol gas is sucked into the circulation branch pipe 161, and enters the plate heat exchanger 15 from the circulation branch pipe 161. At the same time, the refrigerant enters the plate heat exchanger 15 from the refrigerant input pipe 151, and is discharged from the refrigerant output pipe 152 to form a water-cooled cycle, and the water entering the plate heat exchanger 15 to absorb ethanol is continuously cooled, and a low temperature is maintained to improve the absorption effect of ethanol. The cooled ethanol-containing water is discharged from the spray branch pipe into the spray absorption tower 12, and the ethanol-containing cold water circulates to absorb ethanol gas and is further concentrated for easy recycling and reuse.

Claims

1. A recycling device for ethanol tail gas in D-ribose production, characterized by: It includes an ethanol absorption tank and a spray absorption tower; the tower body of the spray absorption tower is connected to the middle of the upper end of the ethanol absorption tank, the lower end of the tower body is connected to the upper end of the ethanol absorption tank, the ethanol tail gas is connected to the upper end of the ethanol absorption tank through the tail gas pipeline, the bottom of the ethanol absorption tank is connected to a recovery pipeline, the recovery pipeline is provided with an electromagnetic valve A, and a centrifugal pump is installed on the recovery pipeline, and the upper end of the spray absorption tower is connected to an exhaust pipe.

2. The ethanol tail gas recycling and recovery device in D-ribose production according to claim 1, characterized in that: A plate heat exchanger is provided on one side of the ethanol absorption tank, and a circulating branch pipe is connected to the recovery pipe. The circulating branch pipe is connected to the inlet on one side of the plate heat exchanger, and the outlet communicated with the inlet is connected to the nozzle in the spray absorption tower through a spray pipe. The inlet on the other side of the plate heat exchanger is connected to a refrigerant input pipe, and the outlet communicated with the inlet is connected to a refrigerant output pipe.

3. The ethanol tail gas recycling and recovery device in D-ribose production according to claim 2, characterized in that: A solenoid valve B is installed on the circulation branch pipe.

4. The ethanol tail gas recycling and recovery device in D-ribose production according to claim 1, characterized in that: A fan is installed on the exhaust pipe.

5. The ethanol tail gas recycling and recovery device in D-ribose production according to claim 1, characterized in that: An absorption filler is arranged in the middle of the tower body of the spray absorption tower.

6. The ethanol tail gas recycling and recovery device in D-ribose production according to claim 1, characterized in that: The tower bodies of the ethanol absorption tank and the spray absorption tower are both cylindrical, and the two are coaxially sealed and connected as a whole.

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