Unlock instant, AI-driven research and patent intelligence for your innovation.

A device and production method for producing ultra-high-purity methane by lng heat pump rectification

A heat pump rectification, methane technology, applied in chemical instruments and methods, distillation purification/separation, lighting and heating equipment, etc., can solve the problems of long process flow, complicated operation, high cost, improve safety factor, and simple process flow , the effect of reducing cooling costs

Active Publication Date: 2019-05-10
HENAN XINLIANXIN SHENLENG ENERGY
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorption-expansion desorption method achieves the purpose of purifying methane through multi-tower high-pressure adsorption and low-pressure desorption. This method has simple equipment, easy operation and maintenance, but the yield is low and the process is long. It requires a lot of supporting equipment and occupies an area of Big
And this method needs to replace the adsorbent regularly, so the cost is high; adsorption-batch rectification method, this method is to first remove impurities such as H2O, CO2, C2 by adsorption method, and then obtain liquid phase methane by batch rectification product
The product purity of this method can reach 99.995%, and can even be increased to 99.999%; but its operation is complicated, the process is long, and the adsorbent needs to be replaced regularly

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A device and production method for producing ultra-high-purity methane by lng heat pump rectification
  • A device and production method for producing ultra-high-purity methane by lng heat pump rectification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A device for producing ultra-high-purity methane by heat pump rectification of LNG, comprising a raw material liquid storage tank 48, the raw material liquid storage tank 48 is fed into the first raw material gas of the first rectification tower 4 through the first throttle valve 1 and the evaporator 2 33, the gas phase outlet 30 at the top of the first rectifying tower 4 passes through the first feed gas inlet 36 of the second heat exchanger, the first feed gas outlet 41 of the second heat exchanger, the heat pump 6, and the second heat exchanger The second raw gas inlet 38, the second raw gas outlet 40 of the second heat exchanger and the tee 17 are connected with the raw gas inlet 28 of the second reboiler 10, and the raw gas outlet 48 of the second reboiler 10 passes through the second Four throttling valves 11 are connected to the first feed gas inlet 44 of the second rectification tower 13, the first heat exchanger 3 is arranged inside the evaporator 2, and the liq...

Embodiment 2

[0044] A device for producing ultra-high-purity methane by heat pump rectification of LNG, comprising a raw material liquid storage tank 48, the raw material liquid storage tank 48 is fed into the first raw material gas of the first rectification tower 4 through the first throttle valve 1 and the evaporator 2 33, the gas phase outlet 30 at the top of the first rectifying tower 4 passes through the first feed gas inlet 36 of the second heat exchanger, the first feed gas outlet 41 of the second heat exchanger, the heat pump 6, and the second heat exchanger The second raw gas inlet 38, the second raw gas outlet 40 of the second heat exchanger and the tee 17 are connected with the raw gas inlet 28 of the second reboiler 10, and the raw gas outlet 48 of the second reboiler 10 passes through the second Four throttling valves 11 are connected to the first feed gas inlet 44 of the second rectification tower 13, the first heat exchanger 3 is arranged inside the evaporator 2, and the liq...

Embodiment 3

[0055] A device for producing ultra-high-purity methane by heat pump rectification of LNG, comprising a raw material liquid storage tank 48, the raw material liquid storage tank 48 is fed into the first raw material gas of the first rectification tower 4 through the first throttle valve 1 and the evaporator 2 33, the gas phase outlet 30 at the top of the first rectifying tower 4 passes through the first feed gas inlet 36 of the second heat exchanger, the first feed gas outlet 41 of the second heat exchanger, the heat pump 6, and the second heat exchanger The second raw gas inlet 38, the second raw gas outlet 40 of the second heat exchanger and the tee 17 are connected with the raw gas inlet 28 of the second reboiler 10, and the raw gas outlet 48 of the second reboiler 10 passes through the second Four throttling valves 11 are connected to the first feed gas inlet 44 of the second rectification tower 13, the first heat exchanger 3 is arranged inside the evaporator 2, and the liq...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to a device of producing ultra high purity methane by LNG heat pump distillation and a production method. The device comprises a raw material liquid storage tank, wherein the raw material liquid storage tank is connected to a first raw material gas inlet of a first rectifying tower through a first throttling valve and an evaporator; a gas phase outlet of the first rectifying tower is connected to a raw material gas inlet of a second reboiler through the first raw material gas inlet of a second heat exchanger, a first raw material gas outlet of a second heat exchanger, a heat pump, a second raw material gas inlet of the second heat exchanger, a second raw material gas outlet of the second heat exchanger and a three-way joint; a raw material gas outlet of the second reboiler is connected to a first raw material gas inlet of a second rectifying tower through a fourth throttling valve; the first heat exchanger is arranged in the evaporator; and a liquid phase outlet of the second rectifying tower is connected to the storage tank through a second raw material gas inlet of the first heat exchanger and a second raw material gas outlet of the first heat exchanger. The device provided by the invention has the advantages that the device is simple in process flow, simple to operate, stable in operation and low in energy consumption, and the purity of prepared liquid phase methane is not lower than 99.9995%.

Description

technical field [0001] The invention belongs to the technical field of producing ultra-high-purity methane, and in particular relates to a device and a production method for producing ultra-high-purity methane through LNG heat pump rectification. Background technique [0002] At present, the production of methane mainly adopts two-stage rectification method, adsorption-expansion desorption method and adsorption-batch rectification method; the two-stage rectification method adopts external refrigeration technology, and the two-stage rectification method produces high-purity methane. It can reach 99.99%. Since the remaining cooling capacity of the helium extraction unit can be used in the process, methane is a by-product, and the cost is low, but it needs to rely on a large air separation system. The adsorption-expansion desorption method achieves the purpose of purifying methane through multi-tower high-pressure adsorption and low-pressure desorption. This method has simple e...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F25J3/02C07C7/00C07C7/04C07C9/04
CPCF25J3/0257F25J3/0214F25J3/0233F25J3/0238F25J3/08F25J2200/04F25J2200/74F25J2200/76F25J2210/62F25J2215/60F25J2220/62F25J2220/64F25J2250/20F25J2290/34
Inventor 银延蛟张亚清吕书山张永生郑宪文郭俊磊闫红伟陈剑军
Owner HENAN XINLIANXIN SHENLENG ENERGY