CN209791235U

CN209791235U - N for carbon capture in cement plant2/CO2Membrane separation and enrichment device

Info

Publication number: CN209791235U
Application number: CN201920383458.8U
Authority: CN
Inventors: 尹小林; 赵海洋
Original assignee: Changsha Zichen Technology Development Co Ltd
Current assignee: Changsha Zichen Technology Development Co Ltd
Priority date: 2019-03-25
Filing date: 2019-03-25
Publication date: 2019-12-17
Anticipated expiration: 2029-03-25

Abstract

N for carbon capture in cement plant₂/CO₂The membrane separation and enrichment device comprises N₂Or CO₂Separating and enriching membrane or membrane component, flue gas inlet and N₂Enrichment of export, CO₂An enrichment outlet and a shell, the flue gas inlet and the flue gas outlet are connected with the flue gas inlet and the flue gas inlet are connected with the shell₂Enrichment of export, CO₂The enrichment outlets are all connected with the shell, N₂Or CO₂The separation and enrichment membrane or membrane component is fixed in the shell and consists of N₂Or CO₂Separation of the enriched membrane to form N₂Enrichment zone and CO₂An enrichment region of said N₂Enrichment of the outlet and N₂The enrichment areas are communicated with each other,CO₂Enrichment of the outlet and CO₂The enrichment areas are communicated. The utility model can greatly improve CO₂The trapping efficiency reduces the operation cost; the device has simple structure and low investment, and reduces energy consumption in the carbon capture process by using the existing cement plant equipment as the power for carbon capture and emission reduction; provides an industrialized high-efficiency device for carbon capture, emission reduction and decrement.

Description

N for carbon capture in cement plant2/CO2Membrane separation and enrichment device

Technical Field

The utility model relates to an environmental protection equipment technical field, concretely relates to N for cement plant carbon entrapment₂/CO₂And (4) a membrane separation and enrichment device.

Background

The climate warming is one of the problems affecting the survival and development of human beings, and carbon dioxide discharged by industry is considered as the main cause of the climate warming, and the current situation of energy structure is as follows in China as the most developing country in the world: the primary energy is mainly coal, and the secondary energy is mainly thermal power generation. CO of primary and secondary energy sources with rapid increase of total economic quantity₂The emission has the characteristics of quick growth and large total amount, and cement production enterprises with high pollution and high energy consumption are more CO₂One of the main sources of emissions. Currently, carbon emission reduction and CCS (carbon capture and sequestration) or CCUS (carbon capture, utilization and sequestration) technologies are the main methods for solving the problem of climate warming, but the high investment and the high operation cost of the technologies become serious obstacles for popularization and application of the carbon capture technologies in cement plants.

It is known that the waste gas flow of cement kiln system using limestone as main raw material and coal as fuel is very large and its composition is complex, but the waste gas discharged from kiln system is mainly N₂And CO₂Two major components, currently CO₂One of the main industrial point sources for emission, and large-scale CO production₂One of the main areas of capture abatement, but current industrial carbon capture is whether thermal power plant CO₂Capture of CO also in cement plants₂Trapping of CO due to large flue gas flow₂The concentration is below 30%, and one CO is absent₂Concentration enrichment and decrement method and device, resulting in CO₂The efficiency of trapping is low and the operating cost is high. Therefore, an industrial flue gas CO is developed₂The enrichment device is used for reducing CO₂Trapping costs are highly desirable.

The existing carbon emission reduction and carbon capture technologies mainly comprise a solvent absorption method, an adsorption method, a membrane separation method, a low-temperature separation method and the like for realizing industrialization. Hitherto, various existing membrane separation devices are not suitable for membrane separation of large flow of industrial flue gas, and the main reason is that the structural characteristics and functions are not suitable for separation of large flow of industrial flue gas.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome prior art not enough, provide a low investment and low running cost, be arranged in the cement factory carry out the N that carbon capture reduces discharging to kiln system flue gas₂/CO₂And (4) a membrane separation and enrichment device.

The technical proposal adopted by the utility model is that a N for carbon capture in cement plants₂/CO₂The membrane separation and enrichment device comprises N₂Or CO₂Separating and enriching membrane or membrane component, flue gas inlet and N₂Enrichment of export, CO₂An enriched outlet and a shell, the flue gas inlet, the N2 enriched outlet and the CO₂The enrichment outlets are all connected with the shell, N₂Or CO₂The separation and enrichment membrane or membrane component is fixed in the shell and consists of N₂Or CO₂Formation of N by separation and enrichment membrane or membrane module₂Enrichment zone and CO₂An enrichment region of said N₂Enrichment of the outlet and N₂The enrichment zone is communicated with CO₂Enrichment of the outlet and CO₂The enrichment areas are communicated.

Further, said N₂Or CO₂The separation enrichment membrane is one of a hollow fiber enrichment membrane, a tubular enrichment membrane, a flat plate enrichment membrane and a spiral enrichment membrane.

further, the casing includes end shell I, mount, end shell II, sealing member, N₂Or CO₂The separation and enrichment membrane is installed on a fixing frame through a sealing element, the fixing frame is fixed in an end shell II, and the end shell I is connected with the end shell II in a sealing mode through a connecting piece.

Further, the flue gas inlet is connected with a tail exhaust fan, and the positive pressure of the wind pressure blown by the tail exhaust fan is used for providing positive pressure for the flue gas gathering area, N₂The enrichment outlet is connected with a chimney, and the negative pressure suction force of the chimney is used as N₂The power of the enrichment zone, saidCO₂Enriching the outlet with CO₂Collecting the negative pressure suction force generated by compression as CO₂The power of the enrichment area effectively utilizes the existing equipment as power, and reduces the operation energy consumption of carbon capture.

The gas entering from the flue gas inlet is mainly mixed gas of nitrogen and carbon dioxide.

Said N is₂Enrichment region and N₂The gas at the enrichment outlet is mainly nitrogen and secondarily carbon dioxide.

The CO is₂Enrichment zone and CO₂The gas at the enrichment outlet is mainly carbon dioxide and is assisted by nitrogen.

The utility model discloses there is following beneficial effect: 1. can greatly improve CO₂The trapping efficiency reduces the operation cost; 2. effectively solves the problem of low-cost CO in cement plants₂The problem of trapping and emission reduction is solved, and N of the flue gas of the kiln system is solved₂、CO₂The problem of low-cost separation and enrichment is solved; 3. the device has simple structure and small investment, and simultaneously, the existing cement plant equipment can be used as the power for carbon capture and emission reduction, so that the energy consumption in the carbon capture process is reduced; 4. can remove CO in the kiln system₂A large amount of enrichment is carried out, and an industrialized high-efficiency device is provided for carbon capture, emission reduction and decrement.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;

Fig. 5 is a schematic structural diagram of embodiment 3 of the present invention.

In the figure, 1-N₂Or CO₂Separation and enrichment Membrane or Membrane Module, 101-N₂Separation enrichment Membrane, 102-CO₂Separation and enrichment Membrane, 103-CO₂Separation and enrichment module, 2-flue gas inlet, 3-N₂Enrichment Exit, 301-N₂Enrichment zone, 4-CO₂Enrichment Outlet, 401-CO₂Enrichment zone, 5-shell, 501-end shell I, 502-holder, 503-end shell II, 504-a seal.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

Referring to fig. 1 and 2, the present embodiment includes fourteen groups N₂Separation enrichment membrane 101, flue gas inlet₂、N₂Enrichment outlet 3, CO₂An enrichment outlet 4, a shell 5, a flue gas inlet 2 and a flue gas inlet N₂Enrichment outlet 3, CO₂The enrichment outlets 4 are all connected with the shell 5, N₂The separation and enrichment membrane 101 is fixed in the shell 5, and the N2 separation and enrichment membrane 101 is separated in the shell 5 to form N₂Enrichment zone 301 and CO₂An enrichment zone 401. N is a radical of₂Enrichment outlets 3 and N₂The enrichment zone 301 is communicated with CO₂Enrichment of Exit 4 with CO₂The enrichment zone 401 is in communication.

N₂The separation enrichment membrane 101 is made of a hollow fiber nitrogen enrichment membrane; the shell comprises an end shell I501, a fixing frame 502, an end shell II 503, a sealing element 504 and a sealing element N₂Or CO₂The separation and enrichment membrane is arranged on a fixing frame 502 through a sealing element 504, the fixing frame 502 is fixed in an end shell II 503, and the end shell I501 is connected with the end shell II 503 in a sealing manner through a connecting element; the smoke inlet 2 is externally connected with a tail exhaust fan, and the positive pressure of the wind pressure blown by the tail exhaust fan is used for providing positive pressure for the smoke gathering area, N₂The enrichment outlet 3 is externally connected with a chimney, and the negative pressure suction force of the chimney is used as N₂Motive force of enrichment zone 301, CO₂Enrichment of the outlet 4 with CO₂Collecting the negative pressure suction force generated by compression as CO₂The power of the enrichment zone 401 effectively utilizes the existing equipment as power, and reduces the operation energy consumption of carbon capture.

Example 2

Referring to fig. 3 and 4, the difference between this embodiment and embodiment 1 is N in this embodiment₂Or CO₂The separation and enrichment membrane 1 is CO₂separation enrichment Membrane 102, CO₂The separation and enrichment membrane 102 is composed of five flat plate type enrichment membranes. The same as in example 1.

Example 3

Referring to FIG. 5, the present embodiment andExample 1 is different in that N in this example₂Or CO₂The separation and enrichment membrane 1 comprises forty groups of CO₂Separation and enrichment of Membrane group 103, CO₂The separation and enrichment membrane group 103 is a roll-type enrichment membrane. The same as in example 1.

Various modifications and variations of the embodiments of the present invention may be made by those skilled in the art, and they are still within the scope of the present invention, provided they are within the scope of the claims and their equivalents.

What is not described in detail in the specification is prior art that is well known to those skilled in the art.

Claims

1. N for carbon capture in cement plant₂/CO₂The membrane separation and enrichment device is characterized by comprising N₂Or CO₂Separating and enriching membrane or membrane component, flue gas inlet and N₂enrichment of export, CO₂An enriched outlet and a shell, the flue gas inlet, the N2 enriched outlet and the CO₂The enrichment outlets are all connected with the shell, N₂Or CO₂The separation and enrichment membrane or membrane component is fixed in the shell and consists of N₂Or CO₂separation of the enriched membrane to form N₂Enrichment zone and CO₂An enrichment region of said N₂Enrichment of the outlet and N₂The enrichment zone is communicated with CO₂Enrichment of the outlet and CO₂The enrichment areas are communicated.

2. The N for cement plant carbon capture of claim 1₂/CO₂The membrane separation and enrichment device is characterized in that N is₂Or CO₂the separation enrichment membrane is one of a hollow fiber enrichment membrane, a tubular enrichment membrane, a flat plate enrichment membrane and a spiral enrichment membrane.

3. N for cement plant carbon capture according to claim 1 or 2₂/CO₂The membrane separation and enrichment device is characterized in that the shell comprises an end shell I, a fixing frame, an end shell II and a sealing element, and N is₂Or CO₂The separation and enrichment membrane is installed on a fixing frame through a sealing element, the fixing frame is fixed in an end shell II, and the end shell I is connected with the end shell II in a sealing mode through a connecting piece.

4. N for cement plant carbon capture according to claim 1 or 2₂/CO₂The membrane separation and enrichment device is characterized in that the flue gas inlet is connected with a tail exhaust fan, positive pressure is provided for a flue gas gathering area by using the positive pressure of the wind pressure blown by the tail exhaust fan, and N is₂The enrichment outlet is connected with a chimney, and the negative pressure suction force of the chimney is used as N₂Power of the enrichment zone, said CO₂Enriching the outlet with CO₂Collecting the negative pressure suction force generated by compression as CO₂The power of the enrichment zone.

5. N for cement plant carbon capture according to claim 3₂/CO₂The membrane separation and enrichment device is characterized in that the flue gas inlet is connected with a tail exhaust fan, positive pressure is provided for a flue gas gathering area by using the positive pressure of the wind pressure blown by the tail exhaust fan, and N is₂The enrichment outlet is connected with a chimney, and the negative pressure suction force of the chimney is used as N₂Power of the enrichment zone, said CO₂enriching the outlet with CO₂Collecting the negative pressure suction force generated by compression as CO₂The power of the enrichment zone.