Efficient deep purification device for oil gas amine liquid
By designing an efficient deep purification device for oil and gas amine liquids, and using high-precision filter elements and activated carbon filter elements, the problems of short operating cycles and poor adsorption functions in the existing technology are solved, and efficient purification of amine liquids and stable system operation is achieved. Reduced operating costs.
Patent Information
- Application Number
- CN202420966100.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The existing natural gas amine liquid purification technology has problems such as short operating cycles of filters, poor interception effect, insufficient adsorption function, dependence on foam inhibitors to lead to vicious cycles in the system and high operating costs.
A high-efficiency deep purification device for oil and gas amine liquids is designed, including first-level, second-level and third-level filters. High-precision filter elements and activated carbon filter elements are used to customize the filter materials according to the characteristics of particulate matter and solubility impurities in the amine liquid to achieve high precision. Intercept and adsorption, extend the filter operation cycle, and reduce foaming and defoaming agent use.
Effectively remove particulate matter and soluble impurities in the amine liquid, reduce foaming height and defoaming time, extend the system operation cycle, reduce operating costs, and achieve stable and safe operation of the amine liquid system.
Smart Images
Figure CN222218896U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to a purification device, in particular to a high-efficiency oil, gas and amine liquid deep purification device. Background Art
[0002] Because natural gas contains CO 2 / H 2 Acidic gases such as S can cause pipeline corrosion, reduced calorific value, or freezing of natural gas liquefaction, etc. Therefore, CO2 must be removed before natural gas pipeline transportation or liquefaction. 2 / H 2 S and other acidic gases are removed to within the allowable content. Currently, the main method used is amine liquid absorption to remove CO contained in natural gas. 2 ,H 2 S and other impurity components. However, during the use of amine liquid, some hydrocarbons, degradation products, suspended solids and thermally stable salts and other impurities will accumulate. The presence of these impurities will cause the amine liquid to foam. After foaming, the amount of steam used will increase and the amine liquid will be consumed, causing blockage of the device and pipelines, accelerating the corrosion of equipment pipelines, and in severe cases, affecting the normal operation of the entire device. Therefore, the amine liquid needs to be purified to solve these problems. At present, the natural gas amine liquid purification technology mainly adopts three-stage filtration. However, after production operation verification, it is found that this method still has some disadvantages: 1. The operation cycle of the first and third stage mechanical filters is short and the interception effect is not good; 2. The adsorption filter does not achieve effective adsorption function; 3. It can only rely on antifoaming agents to maintain production. At the same time, the residual amount of antifoaming agents increases the load of the adsorption filter, resulting in a vicious cycle of the amine liquid system; 4. The operating cost remains high. Summary of the invention
[0003] The utility model provides a high-efficiency oil, gas and amine liquid deep purification device to solve the deficiencies of the prior art.
[0004] The utility model discloses a high-efficiency oil and gas amine liquid deep purification device, comprising a primary filter, a secondary filter and a tertiary filter, wherein the outlet end of the primary filter is connected to the inlet end pipeline of the secondary filter, the outlet end of the secondary filter is connected to the inlet end pipeline of the tertiary filter, the primary filter and the tertiary filter are horizontal tank bodies, and the secondary filter is a vertical tank body; one end of the primary filter is provided with a liquid inlet I, and the other end is provided with a liquid outlet I connected to the liquid inlet II at the top of the secondary filter, the liquid outlet II of the secondary filter is connected to the liquid inlet III at one end of the tertiary filter, and the other end of the tertiary filter is provided with a liquid outlet III.
[0005] As a further improvement of the utility model, a vertical fixed plate I is provided at the liquid inlet end of the primary filter, and a vertical supporting orifice plate I is provided at the liquid outlet end, and a filter chamber I is formed between the fixed plate I and the supporting orifice plate I; a plurality of filter elements I are evenly fixed on the fixed plate I at intervals, and the other end of the filter element I is fixed in a through hole I opened on the supporting orifice plate I; a liquid inlet hole I is opened on the fixed plate I between each filter element I.
[0006] As a further improvement of the utility model, a steam inlet I is provided on the left side of the top end of the filter chamber I, and a sewage outlet I is provided on the right side of the lower end.
[0007] As a further improvement of the utility model, the filtering accuracy of the filter element I is 0.6*Aµm.
[0008] As a further improvement of the utility model, a diaphragm I is fixed at the lower part of the secondary filter, and a diaphragm II is fixed at the upper part, a plurality of through holes I are evenly arranged on the diaphragm I, an activated carbon filter element is covered on the through holes I, the upper end of the activated carbon filter element is fixed to the diaphragm II, and a plurality of through holes II are evenly arranged on the diaphragm II.
[0009] As a further improvement of the utility model, the activated carbon filter element is composed of an exoskeleton, an inner skeleton and activated carbon, an outer filter screen is fixed around the inner wall of the exoskeleton, and an inner filter screen is fixed around the outer wall of the inner skeleton. The inner skeleton is placed inside the exoskeleton and forms an annular cavity with it, and the annular cavity is sealed at both ends with end covers. The activated carbon is placed in the annular cavity, and the pore size of the activated carbon is between a-bÅ.
[0010] As a further improvement of the utility model, a steam inlet II is provided at the top of the secondary filter, and a sewage outlet II is provided on the wall above the transverse partition I.
[0011] As a further improvement of the utility model, the liquid inlet end of the three-stage filter is provided with a vertical fixed plate II, and the liquid outlet end is provided with a vertical supporting orifice plate II, and a filter chamber II is formed between the fixed plate II and the supporting orifice plate II; a plurality of filter elements II are evenly fixed on the fixed plate II at intervals, and the other end of the filter element II is fixed in a through hole II opened on the supporting orifice plate II; a liquid inlet hole II is opened on the fixed plate II between each filter element II.
[0012] As a further improvement of the utility model, a steam inlet III is provided on the left side of the top end of the filter chamber II, and a sewage outlet III is provided on the right side of the lower end.
[0013] As a further improvement of the utility model, the filtering accuracy of the filter element II is 0.3*Aµm.
[0014] The utility model discloses a high-efficiency oil and gas amine liquid deep purification device with reasonable structural design. According to the element composition and particle size distribution detection data of particulate matter in the amine liquid, and the functional group and chromatographic mass spectrometry detection data of soluble impurities, the substrate for interception and adsorption can be customized to produce an adsorption filter element, so as to achieve the function of purifying the amine liquid, realize high-precision pollution interception capability and high-efficiency adsorption technology, effectively extend the operation cycle of the filter, effectively remove particulate matter and soluble impurities causing foaming in the amine liquid, realize the smooth operation of the amine liquid circulation system with a foaming height of ≤50mm and a defoaming time of ≤10 s, eliminate the consumption of special defoaming agent with high cost, and realize the safe and stable operation of the amine liquid system and the purpose of reducing the operation intensity. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural sectional view of the utility model;
[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle. Implementation
[0017] The utility model discloses a high-efficiency oil and gas amine liquid deep purification device, comprising a primary filter 1, a secondary filter 2 and a tertiary filter 3, wherein the primary filter 1 and the tertiary filter 3 are horizontal tank bodies, and the secondary filter 2 is a vertical tank body; one end of the primary filter 1 is provided with a liquid inlet Ⅰ4, and the other end is provided with a liquid outlet Ⅰ connected with the liquid inlet Ⅱ at the top of the secondary filter 2, the liquid outlet Ⅱ of the secondary filter 2 is connected with the liquid inlet Ⅲ at one end of the tertiary filter 3, and the other end of the tertiary filter 3 is provided with a liquid outlet Ⅲ9.
[0018] A vertical fixed plate Ⅰ12 is provided at the liquid inlet end of the primary filter 1, and a vertical supporting orifice plate Ⅰ13 is provided at the liquid outlet end, a filter chamber Ⅰ29 is formed between the fixed plate Ⅰ12 and the supporting orifice plate Ⅰ13, a steam inlet Ⅰ5 is provided on the left side of the top end of the filter chamber Ⅰ29, a sewage outlet Ⅰ6 is provided on the right side of the lower end, and switch valves are provided on the steam inlet Ⅰ5 and the sewage outlet Ⅰ6 respectively; a plurality of filter elements Ⅰ14 are fixed on the fixed plate Ⅰ12 at intervals, and the other end of the filter element Ⅰ14 is fixed in the through hole Ⅰ opened on the supporting orifice plate Ⅰ13, and a liquid inlet hole Ⅰ30 is opened on the fixed plate Ⅰ12 between each filter element Ⅰ14.
[0019] The filtering accuracy of the filter element Ⅰ14 is 0.6*Aµm. The manufacturing method is to immerse the polyester needle felt in a closed container of a PTFE mixed solution with a particle size of 6µm at a temperature of 360 degrees, control the PTFE crystallinity in the polyester needle felt to be 40-55%, and the coating amount to be 15 g / m2, wherein the ratio of PTFE emulsion to polybutylene terephthalate in the PTFE mixed solution is 1:3, and then, the treated polyester needle felt is assembled and manufactured by an M-pleat assembly method.
[0020] A diaphragm Ⅰ15 is fixed at the lower part of the secondary filter 2, and a diaphragm Ⅱ16 is fixed at the upper part. A plurality of through holes Ⅰ17 are evenly arranged on the diaphragm Ⅰ15. An activated carbon filter element 18 is covered on the through holes Ⅰ17. The upper end of the activated carbon filter element 18 is fixed to the diaphragm Ⅱ16. The activated carbon filter element 18 is composed of an outer skeleton 20, an inner skeleton 21 and activated carbon 22. An outer filter screen 24 is fixed around the inner wall of the outer skeleton 20, and an inner filter screen 25 is fixed around the outer wall of the inner skeleton 21. The inner skeleton 21 is placed in the outer skeleton 20 and forms an annular cavity with it. The two ends of the annular cavity are sealed with end caps 23 respectively. The activated carbon 22 is placed in the annular cavity, and the activated carbon 22 is controlled by the activation process. The pore size is concentrated between a-bÅ, which can ensure that the soluble impurities can enter the pores of the activated carbon 22, effectively control the soluble impurities to block the front end of the pores of the activated carbon 22, and make full use of the deep pores of the activated carbon 22. The filling method of the activated carbon filter element 18 is changed from the stacking type to the filter element type, and the operation mode is outside-in and inside-out, which can ensure that the treated soluble impurities are completely and evenly in contact with the activated carbon 22, thereby improving the adsorption efficiency of the activated carbon 22 and extending the service life of the activated carbon filter element 18; a plurality of through holes Ⅱ19 are evenly arranged on the diaphragm Ⅱ16; a steam inlet Ⅱ7 is arranged at the top of the secondary filter 2, and a sewage outlet Ⅱ8 is arranged on the wall above the diaphragm Ⅰ15, and switch valves are respectively provided on the steam inlet Ⅱ7 and the sewage outlet Ⅱ8.
[0021] A vertical fixed plate II 26 is provided at the liquid inlet end of the three-stage filter 3, and a vertical supporting orifice plate II 27 is provided at the liquid outlet end. A filter chamber II 31 is formed between the fixed plate II 26 and the supporting orifice plate II 27. A steam inlet III 10 is provided on the left side of the top end of the filter chamber II 31, and a sewage outlet III 11 is provided on the right side of the lower end. Switch valves are provided on the steam inlet III 10 and the sewage outlet III 11 respectively; a plurality of filter elements II 28 are fixed on the fixed plate II 26 at intervals, and the other end of the filter element II 28 is fixed in a through hole II opened on the supporting orifice plate II 27, and a liquid inlet hole II 32 is opened on the fixed plate II 26 between each filter element II 28.
[0022] The filtering accuracy of the filter element II28 is 0.3*Aµm. The manufacturing method is to immerse the polyester needle felt in a closed container of a PTFE mixed solution with a particle size of 3µm at a temperature of 370 degrees, control the PTFE crystallinity in the polyester needle felt to be 40-55%, and the coating amount to be 23 grams / square meter, wherein the ratio of PTFE emulsion to polybutylene terephthalate in the PTFE mixed solution is 1:1.3, and then, the treated polyester needle felt is assembled and manufactured by an M-pleat assembly method.
[0023] The utility model discloses a high-efficiency oil and gas amine liquid deep purification device. When in use, first, the amine liquid to be purified is injected into the primary filter 1 from the liquid inlet Ⅰ4, enters through the liquid inlet hole Ⅰ30, enters the inner cavity after being filtered by the filter element Ⅰ14, and then is collected at the liquid outlet Ⅰ of the primary filter 1, enters the secondary filter, and is filtered by the filter element Ⅰ14 to remove 60% of the particle foaming factor in the amine liquid. When the pressure difference in the primary filter 1 reaches 0.1Mpa, 1.0Kg of steam can be injected into the primary filter 1 from the steam inlet Ⅰ5 for regeneration, and the trapped impurities can be discharged from the sewage outlet Ⅰ6; after the amine liquid enters the secondary filter 2, it is filtered by the active After filtration by the carbon filter element 18, 85% of the highly soluble foaming factors and 15% of the particulate foaming factors can be removed. When the pressure difference in the secondary filter 2 reaches 0.1Mpa, 3.0Kg of steam can be injected into the secondary filter 2 from the steam inlet Ⅱ7 for regeneration, and the trapped impurities can be discharged from the sewage outlet Ⅱ8; the amine liquid filtered by the secondary filter 2 will enter the interior of the tertiary filter 3 from the liquid inlet Ⅲ on the tertiary filter 3, enter the inner cavity of the filter element Ⅱ28 through the liquid inlet hole Ⅱ32 for filtration and collection, and then be uniformly discharged from the liquid outlet Ⅲ9 to complete the purification of the amine liquid; the foaming height of the purified amine liquid is controlled below 50mm, and the defoaming time is less than 10 s.
Claims
1. A high-efficiency oil and gas amine liquid deep purification device, comprising a primary filter (1), a secondary filter (2) and a tertiary filter (3), wherein the outlet end of the primary filter (1) is connected to the inlet end of the secondary filter (2) through a pipeline, and the outlet end of the secondary filter (2) is connected to the inlet end of the tertiary filter (3) through a pipeline, characterized in that The primary filter (1) and the tertiary filter (3) are horizontal tank bodies, and the secondary filter (2) is a vertical tank body; one end of the primary filter (1) is provided with a liquid inlet I (4), and the other end is provided with a liquid outlet I connected to the liquid inlet II at the top of the secondary filter (2); the liquid outlet II of the secondary filter (2) is connected to the liquid inlet III at one end of the tertiary filter (3); and the other end of the tertiary filter (3) is provided with a liquid outlet III (9).
2. According to claim 1, a highly efficient oil and gas amine liquid deep purification device is characterized in that The primary filter (1) is provided with a vertical fixing plate I (12) at the liquid inlet end and a vertical supporting orifice plate I (13) at the liquid outlet end, and a filter chamber I (29) is formed between the fixing plate I (12) and the supporting orifice plate I (13); a plurality of filter elements I (14) are fixed on the fixing plate I (12) at intervals and evenly spaced, and the other end of the filter element I (14) is fixed in a through hole I opened on the supporting orifice plate I (13); and a liquid inlet hole I (30) is opened on the fixing plate I (12) between each filter element I (14).
3. The high-efficiency oil-gas amine liquid deep purification device according to claim 2 is characterized in that A steam inlet I (5) is provided on the left side of the top end of the filter chamber I (29), and a sewage outlet I (6) is provided on the right side of the bottom end.
4. The high-efficiency oil-gas amine liquid deep purification device according to claim 2 is characterized in that The filtering accuracy of the filter element I (14) is 0.6*Aµm.
5. The high-efficiency oil-gas amine liquid deep purification device according to claim 1 is characterized in that The secondary filter (2) has a transverse partition I (15) fixed at the lower part and a transverse partition II (16) fixed at the upper part. A plurality of through holes I (17) are evenly arranged on the transverse partition I (15). An activated carbon filter element (18) is covered on the through holes I (17). The upper end of the activated carbon filter element (18) is fixed to the transverse partition II (16). A plurality of through holes II (19) are evenly arranged on the transverse partition II (16).
6. The high-efficiency oil-gas amine liquid deep purification device according to claim 5 is characterized in that The activated carbon filter element (18) is composed of an outer frame (20), an inner frame (21) and activated carbon (22). An outer filter screen (24) is fixed around the inner wall of the outer frame (20), and an inner filter screen (25) is fixed around the outer wall of the inner frame (21). The inner frame (21) is placed inside the outer frame (20) to form an annular cavity with the outer frame (20). The two ends of the annular cavity are sealed with end caps (23). The activated carbon (22) is placed in the annular cavity. The pore size of the activated carbon (22) is between a and bÅ.
7. The high-efficiency oil-gas amine liquid deep purification device according to claim 5 is characterized in that A steam inlet II (7) is provided at the top of the secondary filter (2), and a sewage outlet II (8) is provided on the wall above the transverse partition I (15).
8. The high-efficiency oil-gas amine liquid deep purification device according to claim 1 is characterized in that The three-stage filter (3) is provided with a vertical fixed plate II (26) at the liquid inlet end and a vertical supporting orifice plate II (27) at the liquid outlet end, and a filter chamber II (31) is formed between the fixed plate II (26) and the supporting orifice plate II (27); a plurality of filter elements II (28) are fixed on the fixed plate II (26) at intervals and evenly spaced, and the other end of the filter element II (28) is fixed in a through hole II opened on the supporting orifice plate II (27); and a liquid inlet hole II (32) is opened on the fixed plate II (26) between each filter element II (28).
9. The high-efficiency oil-gas amine liquid deep purification device according to claim 8 is characterized in that A steam inlet III (10) is provided on the left side of the top end of the filter chamber II (31), and a sewage outlet III (11) is provided on the right side of the bottom end.
10. The high-efficiency oil-gas amine liquid deep purification device according to claim 8, characterized in that The filtering accuracy of the filter element II (28) is 0.3*Aµm.