Distillation system with low energy consumption and low heat emission

Abstract

The invention provides a distillation system with low energy consumption and low heat emission, which comprises a distillation tower, the bottom of the distillation tower is provided with a tower bottom heater, the tower bottom heater is connected with the distillation tower, the top of the distillation tower is provided with a tower top cooler, the tower top cooler is connected with the distillation tower, and the tower bottom heater is connected with the tower top cooler. The tower bottom heater and the tower top cooler are both connected with a hot separator; heat energy and cold energy are generated through the heat separation technology, a heat source serves as heat energy needed in the evaporation process, a cold source serves as cold energy needed in the condensation process, the energy efficiency ratio larger than 1 can be achieved on a working medium circulating pump and a heat separator, heat and cold energy larger than energy consumption can be obtained with low energy consumption, and the phenomenon that a tower top cooler discharges heat to the natural environment is avoided; and a better application prospect can be brought in the distillation industry.

Description

Technical Field

[0001] The invention relates to the field of thermodynamic separation technology, and in particular to a distillation system with low energy consumption and low heat emission. Background Art

[0002] Distillation is a thermodynamic separation technology. It uses the different boiling points of components in a mixed liquid or liquid-solid system to make the low-boiling-point component evaporate first and then condense to separate the entire component. It is a unit operation process that combines the two unit operations of evaporation and condensation. The evaporation process requires heat energy to be input from the environment, while the condensation process requires heat energy to be discharged to the environment. Both the input and discharge of heat energy are not conducive to the sustainable development of natural resources and the ecological environment.

[0003] Therefore, there is an urgent need for a distillation system with low energy consumption and low heat emission to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a distillation system with low energy consumption and low heat emission to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a distillation system with low energy consumption and low heat emission, comprising a distillation tower, wherein a bottom heater is provided at the bottom of the distillation tower, the bottom heater is connected to the distillation tower, a top cooler is provided at the top of the distillation tower, the top cooler is connected to the distillation tower, and both the bottom heater and the top cooler are connected to a heat separator.

[0007] Preferably, the lower part of the distillation tower is provided with a liquid feed port, a liquid discharge port and a gas-liquid mixed phase return port, the liquid discharge port is connected to the feed end of the bottom heater, and the gas-liquid mixed phase return port is connected to the discharge end of the bottom heater.

[0008] Preferably, the tower bottom heater is provided with a distillate outlet, and the distillate outlet is connected to the discharge end of the tower bottom heater.

[0009] Preferably, the tower bottom heater is further provided with a hot working medium inlet and a hot working medium outlet, the hot working medium inlet is connected to the hot outlet of the heat separator, and the hot working medium outlet is connected to the inlet of a working medium circulation pump.

[0010] Preferably, a gas outlet is provided at the top of the distillation tower, and the gas outlet is connected to the feed end of the tower top cooler.

[0011] Preferably, the discharge end of the tower top cooler is connected to the distillate outlet.

[0012] Preferably, the tower top cooler is provided with a cold working medium inlet and a cold working medium outlet, the cold working medium inlet is connected to the cold outlet of the heat separator, and the cold working medium outlet is connected to the inlet of a working medium circulation pump.

[0013] Preferably, the working medium circulation pump is connected to the inlet of the heat separator.

[0014] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0015] The present invention provides a low-energy consumption and low-heat emission distillation system, comprising a distillation tower, wherein a bottom heater is provided at the bottom of the distillation tower, the bottom heater is connected to the distillation tower, a top cooler is provided at the top of the distillation tower, the top cooler is connected to the distillation tower, and both the bottom heater and the top cooler are connected to a heat separator; heat separation technology is used to generate heat energy and cold energy, the heat source is used as the heat energy required for the evaporation process, and the cold source is used as the cold energy for the condensation process, an energy efficiency ratio greater than 1 can be achieved on the working fluid circulation pump and the heat separator, and heat and cold greater than the energy consumption can be obtained with lower energy consumption, thereby avoiding the top cooler from discharging heat to the natural environment, which can bring better application prospects in the distillation industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic structural diagram of a low energy consumption and low heat emission distillation system provided by the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The purpose of the present invention is to provide a distillation system with low energy consumption and low heat emission to solve the problems existing in the prior art.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Embodiment 1:

[0022] This embodiment provides a distillation system with low energy consumption and low heat emission, such as Figure 1 As shown, it includes a distillation tower 2, a bottom heater 3 is provided at the bottom of the distillation tower 2, the bottom heater 3 is connected to the distillation tower 2, a top cooler 7 is provided at the top of the distillation tower 2, the top cooler 7 is connected to the distillation tower 2, and both the bottom heater 3 and the top cooler 7 are connected to the heat separator 5.

[0023] As an embodiment, a liquid feed port 1, a liquid discharge port and a gas-liquid mixed phase return port are provided at the lower portion of the distillation tower 2, the liquid discharge port is connected to the feed end of the bottom heater 3, and the gas-liquid mixed phase return port is connected to the discharge end of the bottom heater 3.

[0024] As an implementation mode, the tower bottom heater 3 is provided with a distillate outlet 6 , and the distillate outlet 6 is connected to the discharge end of the tower bottom heater 3 .

[0025] As an implementation mode, the tower bottom heater 3 is further provided with a hot working medium inlet and a hot working medium outlet, the hot working medium inlet is connected to the hot outlet of the heat separator 5 , and the hot working medium outlet is connected to the inlet of the working medium circulation pump 4 .

[0026] As an embodiment, a gas outlet is provided at the top of the distillation tower 2 , and the gas outlet is connected to the feed end of the tower top cooler 7 .

[0027] As an embodiment, the discharge end of the tower top cooler 7 is connected to the distillate outlet 8 .

[0028] As an implementation mode, the tower top cooler 7 is provided with a cold working medium inlet and a cold working medium outlet, the cold working medium inlet is connected to the cold outlet of the heat separator 5 , and the cold working medium outlet is connected to the inlet of the working medium circulation pump 4 .

[0029] As an implementation mode, the working medium circulation pump 4 is connected to the inlet of the heat separator 5 .

[0030] The present invention provides a distillation system with low energy consumption and low heat emission. The bottom of the distillation tower 2 is connected to a bottom heater 3, which heats and vaporizes a portion of the feed liquid and turns the rest into distillate. The top of the distillation tower 2 is connected to a top cooler 7, which condenses the gas in the distillation tower 2 into a liquid distillate. The heat source of the bottom heater 3 and the cold source of the top cooler 7 come from the heat output end and the cold output end of the heat separator 5. The inlet end of the heat separator 5 is connected to the outlet of the working medium circulation pump 4. The hot outlet of the bottom heater 3 and the cold outlet of the top cooler 7 meet. It is then connected to the inlet of a working fluid circulation pump 4. Under the drive of the working fluid circulation pump 4, the closed-loop circulation of the working fluid can be realized, and the separation and output of cold and heat can be realized on the heat separator 5. The heat output is used as the heat source of the distillation tower bottom heater 3, and the cold output is used as the cold source of the distillation tower top cooler 7. An energy efficiency ratio greater than 1 can be achieved on the working fluid circulation pump and the heat separator, and heat and cold greater than the energy consumption can be obtained with lower energy consumption, thereby avoiding the top cooler from discharging heat to the natural environment, which can bring better application prospects in the distillation industry.

[0031] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A distillation system with low energy consumption and low heat emission, characterized in that: The invention comprises a distillation tower, wherein a bottom heater is arranged at the bottom of the distillation tower, the bottom heater is connected to the distillation tower, a top cooler is arranged at the top of the distillation tower, the top cooler is connected to the distillation tower, and both the bottom heater and the top cooler are connected to a heat separator.

2. The low energy consumption and low heat emission distillation system according to claim 1, characterized in that: The lower part of the distillation tower is provided with a liquid feed port, a liquid discharge port and a gas-liquid mixed phase return port, the liquid discharge port is connected to the feed end of the tower bottom heater, and the gas-liquid mixed phase return port is connected to the discharge end of the tower bottom heater.

3. The low energy consumption and low heat emission distillation system according to claim 2, characterized in that: The tower bottom heater is provided with a distillate outlet, and the distillate outlet is connected to the discharge end of the tower bottom heater.

4. The low energy consumption and low heat emission distillation system according to claim 3, characterized in that: The tower bottom heater is also provided with a hot working medium inlet and a hot working medium outlet. The hot working medium inlet is connected to the hot outlet of the heat separator, and the hot working medium outlet is connected to the inlet of a working medium circulation pump.

5. The low energy consumption and low heat emission distillation system according to claim 4, characterized in that: A gas outlet is provided at the top of the distillation tower, and the gas outlet is connected to the feed end of the tower top cooler.

6. The low energy consumption and low heat emission distillation system according to claim 5, characterized in that: The discharge end of the tower top cooler is connected to the distillate outlet.

7. The low energy consumption and low heat emission distillation system according to claim 6, characterized in that: The tower top cooler is provided with a cold working medium inlet and a cold working medium outlet, the cold working medium inlet is connected to the cold outlet of the heat separator, and the cold working medium outlet is connected to the inlet of a working medium circulation pump.

8. The low energy consumption and low heat emission distillation system according to claim 7, characterized in that: The working medium circulation pump is connected to the inlet of the heat separator.

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