CN218581768U - Vacuum pumping system for biodiesel rectification system - Google Patents
Vacuum pumping system for biodiesel rectification system Download PDFInfo
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- CN218581768U CN218581768U CN202223088998.4U CN202223088998U CN218581768U CN 218581768 U CN218581768 U CN 218581768U CN 202223088998 U CN202223088998 U CN 202223088998U CN 218581768 U CN218581768 U CN 218581768U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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Abstract
The utility model discloses a vacuum pumping system for a biodiesel rectification system, which comprises a first vacuum pumping unit, a second vacuum pumping unit, a third vacuum pumping unit, a cooling and pollution discharge system and an electric control system which are connected in sequence; the first vacuumizing unit is provided with a first working pump and a first liquid discharging tank; the second vacuumizing unit is provided with a second working pump and a second liquid discharge tank, and the first working pump and the second working pump are both roots pumps; the third vacuumizing unit is provided with a third working pump which is a screw pump. The utility model utilizes the liquid discharge tank to realize the discharge of light component condensate in the vacuum-pumping process, avoid the light component to enter the circulating water of the third vacuum-pumping unit along with the vacuum pipeline, avoid the circulating cooling water to be polluted by the light component, reduce the water pollution amount and the light component overflow amount, and ensure the working environment; additionally, the utility model discloses the utilization has the light component that receives jar and wound heat exchanger to take out tertiary vacuum unit and condenses, and the condensation is effectual, reduces waste gas as far as possible.
Description
Technical Field
The utility model relates to a biodiesel's rectification technique especially relates to an evacuation system for biodiesel rectification system.
Background
Fatty acid methyl ester (commonly called as biodiesel) is renewable green clean energy which can replace petroleum diesel, is also an important biochemical basic raw material, and has the potential of large-scale industrialization. At present, most biodiesel production systems use high acid value recovered oil as a raw material, so that methyl esterification reaction needs to be carried out on raw oil in the preparation process to generate fatty acid methyl ester from free fatty acid so as to reduce the acid value of the raw oil; then the catalyst is used to catalyze the raw oil to carry out ester exchange reaction with methanol to obtain fatty acid methyl ester. Then rectifying the fatty acid methyl ester to obtain a finished product of the biodiesel.
The rectification process of the fatty acid methyl ester is carried out in a rectification tower, and a vacuum pumping system is utilized to pump vacuum to the rectification tower so as to carry out rectification and purification on the fatty acid methyl ester. At present, a plurality of pumps and a liquid ring vacuum pump are utilized to pump a vacuum in a vacuumizing system matched with a rectifying tower, light components are mixed into the liquid ring vacuum pump along with a vacuum pipeline during vacuumizing, the circulating water temperature of the liquid ring vacuum pump is increased, a large amount of light components are contained, the condition of volatilization of the light components exists, pollution is caused to the atmosphere, water pollution is caused when the light components enter the circulating water of the liquid ring vacuum pump, the sewage treatment capacity and the treatment difficulty are increased, and the smell is large.
Disclosure of Invention
In view of this, the utility model provides a vacuum pumping system for biodiesel rectification system effectively avoids the light component in the vacuum pipe to get into the circulating water, reduces sewage volume and exhaust emissions.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to a vacuum pumping system for a biodiesel rectification system, which comprises a three-stage vacuum pump set, a cooling and pollution discharge system and an electric control system, wherein the three-stage vacuum pump set is composed of a first vacuum pumping unit, a second vacuum pumping unit and a third vacuum pumping unit which are sequentially connected;
the first vacuumizing unit is provided with a first working pump and a first liquid discharging tank connected with the first working pump;
the second vacuumizing unit is provided with at least two second working pumps which are sequentially connected and a second liquid discharge tank connected with a liquid discharge port of the last second working pump, and the first working pump and the second working pump are both roots pumps;
the third vacuumizing unit is provided with a third working pump connected with the exhaust port of the last second working pump, the exhaust port of the third working pump is connected with the cooling and sewage discharging system, and a check valve is arranged at the air inlet of the third working pump; and the third working pump is a screw pump;
the air inlet of the first working pump is provided with a pressure transmitter, the pressure transmitter transmits a signal to the electric control system, and the control output end of the electric control system is electrically connected with the control input ends of the first working pump, the second working pump and the third working pump.
In the scheme, the first vacuumizing unit and the second vacuumizing unit are both provided with liquid discharge tanks, and the inlet of the third vacuumizing unit is provided with a check valve, so that the discharge of light component condensate is realized, the light component is effectively prevented from entering circulating water of the third vacuumizing unit along with a vacuum pipeline, the circulating cooling water of the third vacuumizing unit is effectively prevented from being polluted by the light component, the water pollution amount and the light component overflow amount are reduced, and the working environment is ensured; additionally, the utility model discloses the utilization has the light component that receives jar and wound heat exchanger to take out tertiary vacuum unit and condenses, and the condensation is effectual, reduces waste gas as far as possible.
Preferably, the cooling and sewage draining system comprises a vertically arranged wound heat exchanger and a receiving tank connected with the wound heat exchanger, the wound heat exchanger is provided with a cooling channel and a gas channel, an exhaust port of the third working pump enters the receiving tank after heat exchange between the gas channel and a refrigerant in the cooling channel, and the receiving tank is provided with a third liquid discharge pipe with a third liquid discharge valve and an exhaust port for discharging gas.
Preferably, motors of the first working pump, the second working pump and the third working pump are all explosion-proof motors, so that the safety is improved; explosion proof machine is controlled by electrical system, in order to realize the utility model discloses a start simultaneously and close.
Preferably, the exhaust port of the first working pump is a side exhaust port and is connected with the air inlet end of the first second working pump; the liquid outlet of the first working pump is a bottom liquid outlet and is connected with the first liquid discharge tank, and a first liquid discharge pipe with a first liquid discharge valve is arranged at the liquid outlet of the first liquid discharge tank. The utility model provides a first working pump has side gas vent and first bat liquid mouth, the installation of being convenient for.
Preferably, the number of the second working pumps is two, the second working pump is provided with a side exhaust port and a bottom liquid discharge port, the side exhaust port is connected with the third working pump, the bottom liquid discharge port is communicated with the second liquid discharge tank, and a second liquid discharge pipe with a second liquid discharge valve is arranged at the liquid discharge port of the second liquid discharge tank.
Preferably, an explosion-proof temperature controller is arranged on an air inlet pipeline of the third working pump, and a flushing branch pipe with a ball valve is connected between the check valve and the explosion-proof temperature controller.
Compared with the prior art, the first vacuumizing unit and the second vacuumizing unit of the utility model are both provided with the liquid discharging tank, and the inlet of the third vacuumizing unit is provided with the check valve, so that the discharge of light component condensate is realized, the light component is effectively prevented from entering the circulating water of the third vacuumizing unit along with the vacuum pipeline, the circulating cooling water of the third vacuumizing unit is effectively prevented from being polluted by the light component, the water pollution amount and the light component overflow amount are reduced, and the working environment is ensured; additionally, the utility model discloses the utilization has the light component that receives jar and wound heat exchanger and take out tertiary vacuum unit to carry out the condensation, and the condensation is effectual, reduces waste gas as far as possible.
Drawings
Fig. 1 is a piping diagram of the present invention.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings, which are implemented on the premise of the technical solution of the present invention, and give detailed implementation manners and specific operation procedures, but the scope of the present invention is not limited to the following embodiments.
It should be noted that in the following description of the embodiments, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" when they are presented are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
As can be seen from fig. 1, the utility model provides a vacuum pumping system for a biodiesel rectification system, which comprises a three-stage vacuum pump set consisting of a first vacuum pumping unit, a second vacuum pumping unit and a third vacuum pumping unit which are connected in sequence, a cooling and pollution discharging system for cooling light component gas pumped by the three-stage vacuum pump set, and an electric control system (arranged in an electric control cabinet 1) for controlling the three-stage vacuum pump set; the first vacuumizing unit comprises a first working pump 2.1 and a first liquid discharge tank 2.2 (the first liquid discharge tank 2.2 is preferably a small-volume tank with the volume of 10L due to less condensation), the second vacuumizing unit comprises a second working pump 4.1 and a second liquid discharge tank 4.2 (the first liquid discharge tank 2.2 is preferably a small-volume tank with the volume of 10L due to less condensation), the third vacuumizing unit comprises a third working pump 3, and the first working pump 2.1, the two second working pumps 4.1 and the third working pump 3 are sequentially connected together through a vacuum pipeline;
the first working pump 2.1 is provided with a first side exhaust port and a first bottom liquid outlet, the first bottom liquid outlet is connected with the first liquid discharge tank 2.2 through a first liquid discharge pipeline 2.3, and a first liquid discharge pipe 2.5 with a first liquid discharge valve 2.4 is arranged on the liquid outlet of the first liquid discharge tank 2.2. During operation, condensate generated by the first working pump 2.1 is discharged into the first liquid discharge tank 2.2, so that the condensate is prevented from entering the second vacuumizing unit along with light components, and the light components are prevented from entering a vacuum pipeline;
for the convenience of distinguishing, the two second working pumps are sequentially marked as a second working pump 4.1A and a second working pump 4.1B, the second working pump 4.1B is provided with a second side exhaust port and a second bottom liquid discharge port, the second side exhaust port is connected with the air inlet end of the third working pump 3, condensate generated by the second working pump 4.1 enters a second liquid discharge tank 4.2 through a second liquid discharge pipeline 4.3, and the condensate is further prevented from entering a third vacuum pumping unit to pollute circulating water of the third working pump 3; the second bottom liquid outlet is connected with a second liquid outlet tank 4.2, and a second liquid outlet pipe 4.5 with a second liquid outlet valve 4.4 is connected at the liquid outlet of the second liquid outlet tank 4.2 and can be used for periodic discharge.
The first working pump 2.1 and the second working pump 4.1 are both roots pumps, the third working pump 3 is a screw pump, circulating water of the screw pump is cooling water, and a vacuum pipeline on the air inlet side of the third working pump 3 is provided with a check valve 5 and an explosion-proof temperature controller 9, so that light component gas is prevented from reversely returning to the second vacuumizing unit; a branch pipe with a ball valve 10 is connected between the check valve 5 and the explosion-proof thermostat 9 to facilitate the flushing of the pump. In addition, an air outlet of the third working pump 3 enters a winding type heat exchanger 6.1 which is described later along with a vacuum pipeline, and a liquid outlet of the third working pump 3 is directly connected with the receiving tank 6.2, so that condensate generated in the running process of the third working pump 3 directly enters the receiving tank 6.2.
As can be seen from fig. 1, the cooling and sewage system includes a vertically arranged winding heat exchanger 6.1 (adopting a 10-square winding heat exchanger 6.1) and a receiving tank 6.2 connected to the winding heat exchanger 6.1, the winding heat exchanger 6.1 has a cooling channel and a gas channel, an exhaust port of the third working pump 3 enters the receiving tank 6.2 after exchanging heat with a refrigerant in the cooling channel through the gas channel, and the receiving tank 6.2 has a third liquid discharge pipe 6.4 with a third liquid discharge valve 6.3 and an exhaust port 6.5 for discharging gas. The winding type heat exchanger 6.1 is adopted for heat exchange, the heat exchange effect is good, and the high-efficiency condensation of light components is realized; the condensed light component liquid flows into a receiving tank 6.2, and is discharged to a sewage treatment system through a third liquid discharge pipe 6.5.
During actual installation, an explosion-proof temperature controller is also arranged on the vacuum pipeline at the air inlet side of the third working pump 3, and a flushing branch pipe with a ball valve is connected between the check valve 5 and the explosion-proof temperature controller 10; the vacuum pipelines at the inlet sides of the first working pump 2.1 and the second working pump 4.1 are both connected with a flushing branch pipe with a flushing valve 7 (a manual ball valve); the motor of first working pump 2.1, second working pump 4.1 and third working pump 3 all adopts explosion-proof machine, and the air inlet department of first working pump 2.1 still is provided with pressure transmitter 8, and electrical system provides the power and receives pressure transmitter's signal for pressure transmitter, and electrical system controls the explosion-proof machine of four working pumps, in order to realize the utility model discloses an automatic opening and closing.
The utility model discloses a working process and principle do: the air inlet of the first working pump 2.1 is communicated with the rectifying tower, the utility model is in a working state by starting the electric control system, the four working pumps are connected in sequence, so that the light component gas is pumped into the winding type heat exchanger 6.1 for heat exchange and cooling, and the condensed light component is discharged into the receiving tank 6.2; in the operation process, the drain valves of the drain pipelines on the first working pump 2.1 and the second working pump 4.1 are periodically opened (certainly, the drain valves can also be in a constantly opened state), so that the condensate generated by vacuumizing is discharged into the drain tank as much as possible, the condensate is prevented from entering a circulating water system of the screw pump, and the sewage quantity is reduced; the combination of the liquid discharge tank and the cooling and sewage discharging system realizes the full condensation of the light components, reduces the emission amount of the light components and protects the environment. When the rectification is finished, the vacuum pipeline and the rectification tower can be cut off firstly for avoiding the occurrence of the suck-back condition of the rectification tower, and then the vacuum pumping system is closed.
Finally, it should be emphasized that the above-described embodiments are merely preferred embodiments of the present invention, and not limitative of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention as defined in the appended claims. Therefore, any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An evacuation system for a biodiesel rectification system, characterized in that: the device comprises a three-stage vacuum pump set, a cooling and sewage discharging system and an electric control system, wherein the three-stage vacuum pump set consists of a first vacuumizing unit, a second vacuumizing unit and a third vacuumizing unit which are sequentially connected;
the first vacuumizing unit is provided with a first working pump and a first liquid discharging tank connected with the first working pump;
the second vacuumizing unit is provided with at least two second working pumps which are sequentially connected and a second liquid discharge tank connected with a liquid discharge port of the last second working pump, and the first working pump and the second working pump are both roots pumps;
the third vacuumizing unit is provided with a third working pump connected with the exhaust port of the last second working pump, the exhaust port of the third working pump is connected with the cooling and pollution discharge system, and the air inlet of the third working pump is provided with a check valve; and the third working pump is a screw pump;
wherein, the air inlet department of first working pump is provided with pressure transmitter, pressure transmitter gives signal transmission the electrical system, electrical system's control output end is connected with the control input electricity of first working pump, second working pump and third working pump.
2. The evacuation system for a biodiesel rectification system of claim 1 wherein: the cooling and sewage discharging system comprises a vertically arranged winding type heat exchanger and a receiving tank connected with the winding type heat exchanger, the winding type heat exchanger is provided with a cooling channel and a gas channel, an exhaust port of the third working pump enters the receiving tank after heat exchange between the gas channel and a refrigerant in the cooling channel, and the receiving tank is provided with a third liquid discharge pipe with a third liquid discharge valve and an exhaust port for discharging gas.
3. The evacuation system for a biodiesel rectification system of claim 1, wherein: and the motors of the first working pump, the second working pump and the third working pump are all explosion-proof motors.
4. The evacuation system for a biodiesel rectification system of claim 1, wherein: the exhaust port of the first working pump is a side exhaust port and is connected with the air inlet end of the first second working pump; the liquid outlet of the first working pump is a bottom liquid outlet and is connected with the first liquid discharge tank, and a first liquid discharge pipe with a first liquid discharge valve is arranged at the liquid outlet of the first liquid discharge tank.
5. The evacuation system for a biodiesel rectification system of claim 4, wherein: the number of the second working pumps is two, the second working pump is provided with a side exhaust port and a bottom liquid discharge port, the side exhaust port is connected with the third working pump, the bottom liquid discharge port is communicated with the second liquid discharge tank, and a second liquid discharge pipe with a second liquid discharge valve is arranged at the liquid discharge port of the second liquid discharge tank.
6. The evacuation system for a biodiesel rectification system of claim 1 wherein: and an explosion-proof temperature controller is arranged on an air inlet pipeline of the third working pump, and a branch pipe with a ball valve is connected between the check valve and the explosion-proof temperature controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223088998.4U CN218581768U (en) | 2022-11-16 | 2022-11-16 | Vacuum pumping system for biodiesel rectification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223088998.4U CN218581768U (en) | 2022-11-16 | 2022-11-16 | Vacuum pumping system for biodiesel rectification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218581768U true CN218581768U (en) | 2023-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223088998.4U Active CN218581768U (en) | 2022-11-16 | 2022-11-16 | Vacuum pumping system for biodiesel rectification system |
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| Country | Link |
|---|---|
| CN (1) | CN218581768U (en) |
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- 2022-11-16 CN CN202223088998.4U patent/CN218581768U/en active Active
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