Pretreatment equipment for natural gas liquefaction

Abstract

The utility model discloses pretreatment equipment for natural gas liquefaction, and relates to the technical field of natural gas pretreatment. The device comprises a base, two first supporting blocks are fixedly mounted at the top of the base, and a separation mechanism, a pre-cooling heat exchange mechanism and a deacidification and dehydration mechanism are arranged on the base; and the separation mechanism comprises a first separation assembly and a second separation assembly, the first separation assembly comprises a pre-separator fixedly installed at the tops of two first supporting blocks, an air inlet pipe is fixedly installed on the outer wall of the pre-separator, and two second supporting blocks are fixedly installed at the top of the base. According to the pretreatment equipment for natural gas liquefaction, the separation mechanism, the pre-cooling heat exchange mechanism and the deacidification and dehydration mechanism are arranged, so that most impurities in natural gas can be removed, the purity of the natural gas can be improved, and the natural gas processing standard can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas pretreatment, in particular to a pretreatment device for natural gas liquefaction. Background Art

[0002] Natural gas refers to all gases that exist naturally in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, and lithosphere (including oilfield gas, gas field gas, mud volcano gas, coalbed methane and biogenic gas, etc.). The definition of "natural gas" that has been commonly used for a long time is a narrow definition based on energy, which refers to a mixture of hydrocarbons and non-hydrocarbon gases naturally stored in the strata.

[0003] In the related art, a pretreatment device for natural gas liquefaction is disclosed with publication number CN219149655U, which includes a spray cleaning barrel, a spray rack is provided inside the spray cleaning barrel, an exhaust fan is provided at the upper end of the spray cleaning barrel, and the exhaust fan is connected to the output end of the spray cleaning barrel.

[0004] When the device is in use, since natural gas contains a variety of impurities, the device can only remove part of the impurities in the natural gas, which will result in a lower purity of the natural gas and thus fail to meet the standards for natural gas processing. Utility Model Content

[0005] The utility model aims to provide a pretreatment device for natural gas liquefaction, which is provided with a separation mechanism, a precooling heat exchange mechanism and a deacidification and dehydration mechanism, and solves the problem that the natural gas cleanliness is too low and cannot meet the natural gas processing standard.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a pretreatment device for natural gas liquefaction, comprising a base, two first support blocks are fixedly installed on the top of the base, and a separation mechanism, a precooling heat exchange mechanism and a deacidification and dehydration mechanism are arranged on the base;

[0008] The separation mechanism includes a first separation component and a second separation component. The first separation component includes a pre-separator fixedly mounted on the top of two first support blocks, an air inlet pipe is fixedly mounted on the outer wall of the pre-separator, and two second support blocks are fixedly mounted on the top of the base.

[0009] Furthermore, the second separation assembly includes a filter separator fixedly mounted on the top of the two second support blocks, a first connecting pipe is fixedly mounted on the outer wall of the pre-separator, and a terminal end of the first connecting pipe is fixedly connected to the filter separator.

[0010] Furthermore, the precooling heat exchange mechanism includes a precooling heat exchange component and a boost component, the precooling heat exchange component includes two third support blocks fixedly mounted on the top of the base, a precooling heat exchanger is fixedly mounted on the top of the two third support blocks, a second connecting pipe is fixedly mounted on the outer wall of the filter separator, and the end of the second connecting pipe is fixedly connected to the precooling heat exchanger.

[0011] Furthermore, the boost assembly includes a booster fixedly mounted on the top of the base, a third connecting pipe is fixedly mounted on the outer wall of the precooling heat exchanger, and the end of the third connecting pipe is fixedly connected to the booster.

[0012] Furthermore, the deacidification and dehydration mechanism includes a third separation component, a deacidification and dehydration component and a purification component. The third separation component includes two fourth support blocks fixedly installed on the top of the base, and a raw gas separator is fixedly installed on the top of the two fourth support blocks. A fourth connecting pipe is fixedly installed on the top of the supercharger, and the end of the fourth connecting pipe is fixedly connected to the raw gas separator.

[0013] Furthermore, the deacidification and dehydration assembly includes a deacidification and dehydration tower fixedly installed on the top of the base, a fifth connecting pipe is fixedly installed on the outer wall of the raw gas separator, and the end of the fifth connecting pipe is fixedly connected to the deacidification and dehydration tower.

[0014] Furthermore, the purification component includes a clean gas separation tower fixedly installed on the top of the base, a sixth connecting pipe is fixedly installed on the outer wall of the deacidification and dehydration tower, the end of the sixth connecting pipe is fixedly connected to the clean gas separation tower, and an outlet pipe is fixedly installed on the outer wall of the clean gas separation tower.

[0015] The utility model has the following beneficial effects:

[0016] The utility model is provided with a first separation component. Since natural gas contains solid particle impurities, the solid impurities in the natural gas need to be cleaned up. Under the action of the pre-separator, the solid particle impurities and liquid droplets carried in the conveying medium gas can be removed as much as possible to achieve gas-solid-liquid separation to ensure the normal operation of the pipeline and equipment; by providing a second separation component, under the action of the filter separator, some impurities and moisture in the natural gas can be removed, thereby improving the purity of the natural gas; by providing a pre-cooling heat exchange component, under the action of the pre-cooling heat exchanger, it is avoided that water and hydrocarbon components freeze at low temperatures and block equipment and pipelines, reduce the gas transmission capacity of the pipeline, and improve the calorific value of the natural gas, so that the gas quality standard is met; by providing a booster component, under the action of the booster Under the condition of the deacidification and dehydration tower, the natural gas can be pre-treated with acid gas and other impurities, which can not only solve the corrosion problem, but also avoid the blockage of equipment and pipelines; by providing a purification component, under the action of the clean gas separation tower, the hydrocarbon dew point of the natural gas can be controlled to reach the commercial gas quality index.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of a pretreatment device for natural gas liquefaction according to the utility model;

[0020] Figure 2 This is a schematic diagram of the left side structure of a pretreatment device for natural gas liquefaction according to the utility model;

[0021] Figure 3 This is a schematic diagram of the back structure of a pretreatment device for natural gas liquefaction according to the utility model;

[0022] Figure 4This is a right side structural schematic diagram of a natural gas liquefaction pretreatment device of the utility model;

[0023] Figure 5 The utility model is a front structural schematic diagram of a pretreatment device for natural gas liquefaction.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1. Base; 2. First support block; 3. Pre-separator; 4. Air inlet pipe; 5. Second support block; 6. Filter separator; 7. First connecting pipe; 8. Third support block; 9. Precooling heat exchanger; 10. Second connecting pipe; 11. Supercharger; 12. Third connecting pipe; 13. Fourth support block; 14. Raw gas separator; 15. Fourth connecting pipe; 16. Deacidification and dehydration tower; 17. Fifth connecting pipe; 18. Clean gas separation tower; 19. Sixth connecting pipe; 20. Air outlet pipe. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-5 As shown, the utility model is a pretreatment device for natural gas liquefaction, comprising a base 1, two first support blocks 2 are fixedly installed on the top of the base 1, and a separation mechanism, a precooling heat exchange mechanism and a deacidification and dehydration mechanism are arranged on the base 1;

[0028] The separation mechanism includes a first separation component and a second separation component. The first separation component includes a pre-separator 3 fixedly mounted on the top of two first support blocks 2, an air inlet pipe 4 is fixedly mounted on the outer wall of the pre-separator 3, and two second support blocks 5 are fixedly mounted on the top of the base 1.

[0029] Among them Figure 1 and Figure 2 As shown, the second separation assembly includes a filter separator 6 fixedly mounted on the top of two second support blocks 5 , a first connecting pipe 7 is fixedly mounted on the outer wall of the pre-separator 3 , and the end of the first connecting pipe 7 is fixedly connected to the filter separator 6 .

[0030] By providing the second separation component, part of the impurities and moisture in the natural gas can be removed under the action of the filter separator 6, thereby improving the purity of the natural gas.

[0031] Among them Figure 1and Figure 2 As shown, the precooling heat exchange mechanism includes a precooling heat exchange component and a boost component. The precooling heat exchange component includes two third support blocks 8 fixedly mounted on the top of the base 1, and a precooling heat exchanger 9 is fixedly mounted on the top of the two third support blocks 8. A second connecting pipe 10 is fixedly mounted on the outer wall of the filter separator 6, and the end of the second connecting pipe 10 is fixedly connected to the precooling heat exchanger 9.

[0032] By providing a precooling heat exchange component, under the action of the precooling heat exchanger 9, freezing of water and hydrocarbon components at low temperatures is avoided to block equipment and pipelines, reduce the gas transmission capacity of the pipeline, and improve the calorific value of natural gas, thereby meeting the gas quality standards.

[0033] Among them Figure 3 and Figure 4 As shown, the boost assembly includes a booster 11 fixedly mounted on the top of the base 1 , a third connecting pipe 12 is fixedly mounted on the outer wall of the precooling heat exchanger 9 , and the end of the third connecting pipe 12 is fixedly connected to the booster 11 .

[0034] By providing a boosting assembly, the air at atmospheric pressure can be boosted to a higher pressure level under the action of the booster 11 to meet different natural gas processing requirements.

[0035] Among them Figure 4 As shown, the deacidification and dehydration mechanism includes a third separation component, a deacidification and dehydration component and a purification component. The third separation component includes two fourth support blocks 13 fixedly mounted on the top of the base 1. A raw gas separator 14 is fixedly mounted on the top of the two fourth support blocks 13. A fourth connecting pipe 15 is fixedly mounted on the top of the supercharger 11. The end of the fourth connecting pipe 15 is fixedly connected to the raw gas separator 14.

[0036] By providing the third separation component, the natural gas can be separated again under the action of the raw gas separator 14, and most of the impurities in the natural gas can be removed, so that the purity of the natural gas can be further improved.

[0037] Among them Figure 4 As shown, the deacidification and dehydration assembly includes a deacidification and dehydration tower 16 fixedly mounted on the top of the base 1 , a fifth connecting pipe 17 is fixedly mounted on the outer wall of the raw gas separator 14 , and the end of the fifth connecting pipe 17 is fixedly connected to the deacidification and dehydration tower 16 .

[0038] By providing a deacidification and dehydration component, if the natural gas is not deacidified and dehydrated, the device will be corroded, thus affecting normal use. Under the action of the deacidification and dehydration tower 16, the natural gas can be pretreated with acidic gas and other impurities, which can not only solve the corrosion problem, but also avoid blockage of equipment and pipelines.

[0039] Among them Figure 4 and Figure 5 As shown, the purification component includes a clean gas separation tower 18 fixedly installed on the top of the base 1, a sixth connecting pipe 19 is fixedly installed on the outer wall of the deacidification and dehydration tower 16, the end of the sixth connecting pipe 19 is fixedly connected to the clean gas separation tower 18, and an outlet pipe 20 is fixedly installed on the outer wall of the clean gas separation tower 18.

[0040] By providing a purification component, under the action of the clean gas separation tower 18, the hydrocarbon dew point of the natural gas can be controlled to reach the commercial gas quality index.

[0041] A specific application of this embodiment is:

[0042] Step 1: When in use, natural gas enters the pre-separator 3 through the air inlet pipe 4 for the first separation, and the separated natural gas enters the filter separator 6 through the first connecting pipe 7 for the second separation, and the natural gas after the second separation enters the pre-cooling heat exchanger 9 through the second connecting pipe 10 for treatment;

[0043] Step 2: The treated natural gas enters the supercharger 11 through the third connecting pipe 12 for supercharging, and the supercharged natural gas enters the raw gas separator 14 through the fourth connecting pipe 15 for third separation, so that most of the impurities in the natural gas are removed;

[0044] The third step: the natural gas after the third separation enters the deacidification and dehydration tower 16 through the fifth connecting pipe 17 for deacidification and dehydration, thereby completing the deacidification and dehydration pretreatment of the natural gas. The natural gas after deacidification and dehydration enters the clean gas separation tower 18 through the sixth connecting pipe 19 for purification, so that the natural gas reaches the commercial gas quality index, and the staff can transmit the purified natural gas for external use through the gas outlet pipe 20.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pretreatment device for natural gas liquefaction, comprising a base (1), two first support blocks (2) being fixedly mounted on the top of the base (1), characterized in that: The base (1) is provided with a separation mechanism, a precooling heat exchange mechanism and a deacidification and dehydration mechanism; The separation mechanism comprises a first separation component and a second separation component, the first separation component comprises a pre-separator (3) fixedly mounted on the top of two first support blocks (2), an air intake pipe (4) is fixedly mounted on the outer wall of the pre-separator (3), and two second support blocks (5) are fixedly mounted on the top of the base (1).

2. A natural gas liquefaction pretreatment device according to claim 1, characterized in that: The second separation assembly comprises a filter separator (6) fixedly mounted on the top of two second support blocks (5); a first connecting pipe (7) is fixedly mounted on the outer wall of the pre-separator (3); and the end of the first connecting pipe (7) is fixedly connected to the filter separator (6).

3. A natural gas liquefaction pretreatment device according to claim 2, characterized in that: The precooling heat exchange mechanism comprises a precooling heat exchange component and a pressurizing component, the precooling heat exchange component comprises two third support blocks (8) fixedly mounted on the top of the base (1), a precooling heat exchanger (9) is fixedly mounted on the top of the two third support blocks (8), a second connecting pipe (10) is fixedly mounted on the outer wall of the filter separator (6), and the end of the second connecting pipe (10) is fixedly connected to the precooling heat exchanger (9).

4. A natural gas liquefaction pretreatment device according to claim 3, characterized in that: The boost assembly comprises a booster (11) fixedly mounted on the top of the base (1); a third connecting pipe (12) is fixedly mounted on the outer wall of the precooling heat exchanger (9); and the end of the third connecting pipe (12) is fixedly connected to the booster (11).

5. A natural gas liquefaction pretreatment device according to claim 4, characterized in that: The deacidification and dehydration mechanism comprises a third separation component, a deacidification and dehydration component and a purification component. The third separation component comprises two fourth support blocks (13) fixedly mounted on the top of the base (1), a raw gas separator (14) being fixedly mounted on the top of the two fourth support blocks (13), a fourth connecting pipe (15) being fixedly mounted on the top of the supercharger (11), and an end of the fourth connecting pipe (15) being fixedly connected to the raw gas separator (14).

6. A natural gas liquefaction pretreatment device according to claim 5, characterized in that: The deacidification and dehydration assembly comprises a deacidification and dehydration tower (16) fixedly mounted on the top of the base (1); a fifth connecting pipe (17) is fixedly mounted on the outer wall of the raw gas separator (14); and the end of the fifth connecting pipe (17) is fixedly connected to the deacidification and dehydration tower (16).

7. A natural gas liquefaction pretreatment device according to claim 6, characterized in that: The purification component comprises a clean gas separation tower (18) fixedly mounted on the top of the base (1); a sixth connecting pipe (19) is fixedly mounted on the outer wall of the deacidification and dehydration tower (16); the end of the sixth connecting pipe (19) is fixedly connected to the clean gas separation tower (18); and an outlet pipe (20) is fixedly mounted on the outer wall of the clean gas separation tower (18).

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