CN218407401U - Vertical filtering desander - Google Patents

Abstract

The utility model discloses a vertical filtering desander, which comprises a quick-opening blind plate, a sleeve, a pressing cylinder, a filter element, a lower head and a pressing mechanism; the quick-opening blind plate and the lower end enclosure are respectively arranged at the top and the bottom of the sleeve; the sleeve is internally provided with a first cavity and a second cavity which are communicated with each other from top to bottom, the top end of the pressing cylinder is pressed by the pressing mechanism, the bottom end of the pressing cylinder is positioned in the first cavity, and the filter element is fixed in the second cavity; the pressure cylinder is provided with a vent hole, the filter element is provided with a plurality of filter holes, the pressure cylinder with a hollow structure and the middle part of the filter element form a filter channel, and an annular air outlet cavity is arranged between the inner wall of the second cavity and the outer wall of the filter element; sealing elements are arranged at two ends of the pressing cylinder; an air inlet is formed in the side wall of the top of the sleeve, an air outlet is formed in the bottom of the sleeve, and the air outlet is communicated with the annular air outlet cavity. The utility model discloses a filter core is arranged perpendicularly, and the gas direction is from the top down, and interior business turn over is gone out, plays the effect of cleaning to the grit of filter core inner wall, is favorable to the sand grain to gather in the bottom, the row's of being convenient for sand.

Description

A vertical filter desander

technical field

The utility model relates to the technical field of sand removal equipment for shale natural gas, in particular to a vertical filter sand remover.

Background technique

The extracted shale natural gas contains gravel, and the desander is used for sand removal of shale natural gas, which is located in the first stage of the natural gas treatment process.

The existing desander uses a filter structure with the inner diameter out. During the exploitation of shale gas, the air pressure may be unstable or even extremely high. When the working pressure increases sharply, the filter cartridge will be crushed and damaged. Filtration conditions, damage to the desander itself and downstream process equipment, resulting in great economic losses.

Utility model content

The utility model provides a vertical filter desander to solve the above-mentioned technical problems in the prior art.

The technical scheme adopted by the utility model is: to provide a vertical filter desander, including a quick-opening blind plate, a sleeve, a pressure cylinder, a filter element, a lower head, and a compression mechanism;

The quick-opening blind plate is installed on the top end of the sleeve, and the lower head is installed on the bottom end of the sleeve;

The sleeve has a first cavity and a second cavity that communicate with each other from top to bottom, the bottom end of the pressure cylinder is located in the first cavity, and the top end of the pressure cylinder is located in the quick-opening cavity. In the cylinder of the blind plate, the filter element is fixed in the second cavity; the compression mechanism is arranged in the cylinder of the quick-opening blind plate for compressing the pressure cylinder and the filter element;

The pressure cylinder is provided with ventilation holes, and the filter element is provided with several filter holes. The hollow structure of the pressure cylinder and the middle part of the filter element form a filter channel, and the filter channel communicates with the sand storage cavity of the lower head , there is an annular air outlet cavity between the inner wall of the second cavity and the outer wall of the filter element;

A seal is provided on the side wall at the top of the filter element, and a seal is provided on the side wall at the bottom of the filter element;

An air inlet is provided on the top side wall of the sleeve, an air outlet is provided on the bottom side wall of the sleeve, the air inlet communicates with the first cavity, and the air outlet communicates with the annular air outlet chamber connected;

The shale gas passes through the air inlet, the pressure cylinder, the filter element, the annular air outlet chamber, and the air outlet in sequence to realize desanding of the shale gas.

As a preferred mode of the vertical filter desander, the pressing mechanism includes a pressing cylinder connecting ring, a support block, and a forward connecting screw, the pressing cylinder connecting ring is welded to the top of the pressing cylinder, and a plurality of The supporting block is welded circumferentially on the cylinder inner wall of the quick-opening blind plate;

A plurality of first threaded holes are provided on the connecting ring of the pressure cylinder, and a second threaded hole is provided on each of the support blocks, and the positive connecting screw is connected to the first threaded hole and the second threaded hole In between, the pressure adjustment of the pressure cylinder is realized by adjusting the forward connecting screw.

As a preferred mode of the vertical filter desander, it also includes reverse connecting screws, and at least two third threaded holes are arranged on the connecting ring of the pressing cylinder, and the third threaded holes are located on the support block. Above, the reverse connecting screw is connected to the third threaded hole.

As a preferred mode of the vertical filter desander, the bottom of the first cavity is provided with a first step, a second step and a third step in sequence;

A plurality of ventilation holes are provided on the pressure cylinder located in the first cavity, an annular air intake chamber is formed between the outer wall of the pressure cylinder and the inner wall of the first cavity, and the bottom of the pressure cylinder is located at the second step , the first step increases the volume of the annular air intake chamber;

The top of the filter element is provided with a limit ring, and the limit ring is located at the third step; the seal set on the side wall of the filter element top is the first seal set at the limit ring and the side wall of the third step. ring, so as to seal the annular air inlet cavity and the annular air outlet cavity.

As a preferred mode of the vertical filter desander, a partially thickened section is provided on the wall of the cylinder near the ventilation hole.

As a preferred mode of the vertical filter desander, the top of the second cavity is provided with a variable diameter section, and the bottom of the second cavity is provided with a fourth step and a fifth step in sequence;

The arrangement of the reducing section and the fourth step enables the annular air outlet cavity to be formed between the inner wall of the second cavity and the outer wall of the filter element;

The bottom of the filter element is provided with a positioning ring, and the upper part of the positioning ring is a first annular boss, and the first annular boss is engaged at the fifth step; the seal set on the side wall of the bottom of the filter element is The second sealing ring is arranged between the positioning ring and the side wall of the fifth step.

As a preferred mode of the vertical filter desander, a recoil port is provided at the bottom of the sleeve, and the recoil port communicates with the annular air outlet chamber.

As a preferred mode of the vertical filter desander, a discharge port is opened at the bottom of the sleeve, and the discharge port communicates with the annular air outlet chamber.

As a preferred mode of the vertical filter desander, the top of the sleeve is also provided with a first differential pressure gauge port, and the first differential pressure gauge port communicates with the annular air inlet chamber;

A second differential pressure gauge port is also provided at the bottom of the sleeve, and the second differential pressure gauge port communicates with the annular gas outlet cavity.

As a preferred mode of the vertical filter desander, the lower head is welded, screwed or integrally formed on the bottom end surface of the sleeve.

The beneficial effects of the utility model are:

1. An annular air intake cavity is formed at the natural gas inlet, which reduces the local flow velocity and makes the gas swirl to form a buffer zone, which reduces the erosion of sand particles on the sleeve and prolongs the service life of the equipment.

2. The filter element is vertically arranged, and the gas direction is from top to bottom, inside and out, which can clean the sand on the inner wall of the filter element, which is conducive to the accumulation of sand particles at the bottom and facilitates sand discharge.

3. Different from the existing outside-in and inside-out filter structure, in the process of shale gas exploitation, the air pressure may be unstable and extreme. When the working pressure increases sharply, the filter cartridge will be crushed, which will damage the filter conditions, damage the desander itself, or the downstream process equipment, resulting in great economic losses.

4. The pressure cylinder passes through the lock nut, the pressure cylinder is positioned, and the compression and sealing are reliable.

5. The connecting ring of the pressure cylinder of the utility model is welded with the pressure cylinder, and the connection ring of the pressure cylinder is connected with the support block bolts on the quick-opening blind plate, and then the filter element is pressed by the pressure cylinder, which enhances the convenience and reliability of disassembly during maintenance. sex, ease of use.

6. The same several supporting blocks are evenly distributed and welded on the inner wall of the quick-opening blind plate cylinder. When working, they deform together with the cylinder, avoiding the risk of being pulled apart due to the radial deformation of the cylinder.

7. In addition to the uniformly distributed positive connecting screws on the pressure cylinder connecting ring, there are also uniformly distributed reverse fixing screws, so that the pressure cylinder connecting ring is simultaneously subjected to the pulling force and thrust of the bolts, thereby offsetting the pressure cylinder connecting ring and pressure cylinder. Force deformation, so that the pressure cylinder is more reliable to fix the filter element.

Description of drawings

Fig. 1 is a sectional view of the vertical filter desander disclosed by the utility model.

Fig. 2 is another sectional view of the vertical filter desander disclosed by the utility model.

Fig. 3 is an enlarged view of part A in Fig. 1 .

Fig. 4 is a structural schematic diagram of the quick-opening blind plate disclosed by the utility model.

Fig. 5 is an enlarged view of part B in Fig. 2 .

Fig. 6 is an enlarged view of part C in Fig. 2 .

Reference signs: 1, quick opening blind plate; 2, sleeve; 201, air inlet; 202, first differential pressure gauge port; 203, second differential pressure gauge port; 204, discharge port; 205, recoil 206, air outlet; 207, variable diameter section; 208, first step; 209, second step; 210, third step; 211, fourth step; 212, fifth step; 3, pressure cylinder; 301, Ventilation hole; 302, local thickening section; 4, filter element; 5, lower head; 6, annular air inlet chamber; 7, annular air outlet chamber; 8, limit ring; 801, first sealing ring; 9, positioning ring ; 901, the second sealing ring; 902, the first annular boss; 10, the pressure cylinder connecting ring; 11, the support block; 12, the forward connecting screw; 13, the reverse connecting screw.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings, but the implementation of the utility model is not limited thereto.

Referring to Fig. 1-2, the utility model provides a vertical filter desander, which is used to remove the gravel in the mined shale gas, which includes a quick-opening blind plate 1, a sleeve 2, a pressure cylinder 3, and a filter element 4 , The lower head 5, the compression mechanism.

Specifically, the quick-opening blind plate 1 is installed on the top end of the sleeve 2 , and the lower head 5 is installed on the bottom end of the sleeve 2 . Since the quick-opening blind plate 1 is a prior art, its specific structure will not be repeated in this embodiment.

The sleeve 2 is a hollow structure with a first cavity and a second cavity connected to each other from top to bottom. The bottom end of the pressure cylinder 3 is located in the first cavity, and the top end of the pressure cylinder 3 is located in the cylinder of the quick opening blind plate 1; the filter element 4 is fixed in the second cavity, and the cylinder of the quick opening blind plate 1 is provided with a pressing mechanism , used to compress the pressure cylinder 3 and the filter element 4.

The pressure cylinder 3 is provided with ventilation holes 301, and the filter element 4 is provided with several filter holes. The hollow structure of the pressure cylinder 3 and the middle part of the filter element 4 form a filter channel, and the filter channel communicates with the sand storage cavity of the lower head 5. There is an annular air outlet chamber 7 between the inner wall of the cylinder 2 and the outer wall of the filter element 4 .

The side wall at the top of the filter element 4 is provided with a seal, so that the shale gas cannot directly enter the annular gas outlet chamber 7, and must pass through the pressure cylinder 3 and the filter element 4 to enter the annular gas outlet chamber 7. A seal is also provided on the bottom side wall of the filter element 4 to prevent shale gas from leaking to the lower head 5 .

The top side wall of the sleeve 2 is provided with an air inlet 201, the bottom side wall of the sleeve 2 is provided with an air outlet 206, and the air inlet 201 communicates with the first cavity. One ventilation hole 301 is opposite to each other, and the air outlet 206 communicates with the annular air outlet chamber 7 . Since the filter element 4 is arranged vertically, the gas direction is from top to bottom, inside and out, so that the filter element 4 removes the gravel. In addition, the gravitational direction of the gravel is consistent with the gas flow direction, therefore, the sand particles accumulated on the wall of the filter element 4 are blown down by the passing gas and accumulate in the sand storage cavity of the lower head 5, so that the filter element 4 can work effectively for a long time .

The pressing mechanism includes a cylinder connecting ring, a support block, and a forward connecting screw, the cylinder connecting ring is welded to the top of the cylinder, and a plurality of the support blocks are welded circumferentially to the quick-opening blind plate on the inner wall of the cylinder;

Specifically, the pressing mechanism includes a pressing cylinder connection ring 10 , a support block 11 , and a positive connection screw 12 . The pressure cylinder connecting ring 10 is welded to the top of the pressure cylinder 3, and a plurality of support blocks 11 are circumferentially welded on the inner wall of the cylinder of the quick-opening blind plate 1; there are six support blocks 11 in this embodiment.

The cylinder connecting ring 10 is provided with a plurality of first threaded holes, and each support block 11 is provided with a second threaded hole, and the positive connecting screw 12 is connected between the first threaded hole and the second threaded hole, and by adjusting The positive connection screw 12 realizes the pressure adjustment on the pressure cylinder 3 .

Referring to Figures 3-4, further, the pressing mechanism also includes reverse connecting screws 13, and at least two third threaded holes are arranged on the connecting ring 10 of the pressing cylinder, and the third threaded holes are located above the support block 11. The connecting screw 13 is connected to the third threaded hole. After the reverse connecting screw 13 is tightened, the end surface of the bottom of the reverse connecting screw 13 is against the top end surface of the support block 11. On the one hand, the pressure cylinder connecting ring 10 is simultaneously pressed by the bolt Pulling force and pushing force, thereby offsetting the pressure deformation of the pressure cylinder connecting ring 10 and the pressure cylinder 3, so that the pressure cylinder 3 is more reliable for fixing the pressure filter element 4; on the other hand, the reverse connection screw 13 can prevent the forward connection screw from 12 loose situations occur.

Referring to FIG. 5 , a first step 208 , a second step 209 and a third step 210 are arranged in sequence at the bottom of the first cavity. The cylinder 3 is provided with a plurality of ventilation holes 301, and in this embodiment, the cylinder 3 is provided with 4 ventilation holes 301, and the 4 ventilation holes are distributed in a cross shape. Since the erosion is serious near the vent hole 301 , a local thickening section 302 is provided on the wall of the cylinder 3 near the vent hole 301 . The bottom of the pressing cylinder 3 is located at the second step 209 so as to adapt to pressing cylinders 3 of different thicknesses. An annular air intake cavity 6 is formed between the outer wall of the pressure cylinder 3 and the inner wall of the first cavity, and the first step 208 increases the volume of the annular air intake cavity 6 . The shale gas forms an annular air inlet chamber 6 at the air inlet 201, which reduces the local flow velocity, and makes the gas swirl to form a buffer zone, which reduces the erosion of sand particles on the inner wall of the sleeve 2 and prolongs the life of the equipment.

Referring to Fig. 5, a limit ring 8 is arranged on the top of the filter element 4, and the limit ring 8 is located at the third step 210, and a first sealing ring 801 is also arranged at the side wall of the limit ring 8 and the third step 210, and the annular air inlet chamber 6 and the annular gas outlet cavity 7 are sealed, so that shale gas can only enter the pressure cylinder 3 from the air inlet 201, then enter the filter channel downwards, and then go out from the filter hole of the filter element 4 to the annular gas outlet cavity, and finally from the outlet Air port 206 goes out.

Referring to FIG. 1 and FIG. 6 , the top of the second cavity is provided with a variable diameter section 207 , and the bottom of the second cavity is provided with a fourth step 211 and a fifth step 212 in sequence.

The arrangement of the reducing section 207 and the fourth step 211 makes an annular air outlet chamber 7 formed between the inner wall of the sleeve 2 and the outer wall of the filter element 4 . The volume of the annular air outlet chamber 7 can also be adjusted by changing the reducing section 207 and the fourth step 211 .

Referring to Fig. 5, the bottom of the filter element 4 is provided with a positioning ring 9, and the upper part of the positioning ring 9 is a first annular boss 902, and the first annular boss 902 is engaged at the fifth step 212 to play a position-limiting role. The positioning ring 9 and A second sealing ring 901 is also provided between the side walls of the fifth step 212 to prevent shale gas from leaking to the lower head 5 .

Further, referring to FIG. 1 , a recoil port 205 is opened at the bottom of the sleeve 2 , and the recoil port 205 communicates with the annular air outlet chamber 7 . During the sand removal process, the filter hole on the filter element 4 will inevitably be blocked by gravel. In this case, by connecting a high-pressure air source at the backflush port, part of the gravel can be washed back from the filter hole to the filter channel, thereby falling to the bottom. In the sand storage chamber of the head 5.

Further, referring to FIG. 1 , a discharge port 204 is also opened at the bottom of the sleeve 2, and the discharge port 204 communicates with the annular air outlet chamber 7, so that the high pressure in the annular air outlet chamber 7 is released through the discharge port 204 during maintenance. .

Further, referring to Fig. 1, a first differential pressure gauge port 202 is provided on the top of the sleeve 2, and the first differential pressure gauge port 202 communicates with the annular air inlet chamber 6; a second differential pressure gauge port is also provided at the bottom of the sleeve 2 203 , the second differential pressure gauge port 203 communicates with the annular air outlet chamber 7 . A differential pressure gauge is connected between the first differential pressure gauge port 202 and the second differential pressure gauge port 203, which is used to detect the air pressure difference between the annular air inlet chamber 6 and the annular air outlet chamber 7, the air pressure and the pressure of the annular air inlet chamber 6 The air intake air pressure and the air pressure in the filter channel are the same. When the filter hole of the filter element 4 is blocked too much, the pressure in the annular air outlet chamber 7 will be significantly lower than the air pressure in the annular air inlet chamber 6. By observing the value of the differential pressure gauge Maintenance personnel just know the clogging situation of filter element 4.

Further, the lower head 5 is welded, screwed or integrally formed on the bottom end surface of the sleeve 2 .

In order to more clearly illustrate the relationship between the first cavity, the second cavity, the annular air inlet chamber, the annular air outlet chamber, and the filter channel in this embodiment, the description is as follows: the sleeve 2 is not equipped with the pressure cylinder 3 and the filter element At 4 o'clock, the hollow cavity in the sleeve 2 is divided into a first cavity at the top and a second cavity at the bottom. When the pressure cylinder 3 is installed in the first cavity, the first cavity is divided into two parts. The space between the outer wall of the pressure cylinder 3 and the first cavity is the annular air inlet chamber 6, which is located on the inner wall of the pressure cylinder 3. The space for the upper part of the filter channel. When the filter element 4 is installed in the second cavity, the second cavity is divided into two parts, the space between the inner wall of the second cavity and the outer wall of the filter element 4 is the annular air outlet cavity 7, and the space located on the inner wall of the filter element 4 is the filter element. lower part of the channel.

The working principle of the utility model is:

1. Sand-bearing shale gas enters from the air inlet and reaches the annular air inlet chamber. The flow section increases and the space volume becomes larger, which reduces the flow velocity of the gas and plays a buffer role, reducing the impact of sand particles with kinetic energy on the sleeve. The scouring; the gas changes the flow direction in the pressure cylinder and enters the inside of the filter element; under the action of the pressure difference between the inlet and outlet, the gas enters and exits through the filter element and reaches the outlet.

2. During the circulation process of the sand-bearing shale body, the sand particles are separated by the filter element and attached to the inner wall of the filter element. Due to the upper-inlet and lower-outlet structure, the inlet is higher than the outlet, and the gravitational direction of the attached sand particles is consistent with the gas flow direction. Therefore, The sand accumulated on the wall of the filter element is blown down by the passing gas and accumulates at the bottom of the desander. So that the filter element can work effectively for a long time.

3. The accumulated sand is discharged from the valve connected to the bottom of the lower head.

The above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be applied to the foregoing implementations. The technical solutions described in the examples are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. A vertical filtering desander is characterized by comprising a quick-opening blind plate, a sleeve, a pressing cylinder, a filter element, a lower end enclosure and a pressing mechanism;

the quick-opening blind plate is arranged at the top end of the sleeve, and the lower end enclosure is arranged at the bottom end of the sleeve;

the sleeve is internally provided with a first cavity and a second cavity which are communicated with each other from top to bottom, the bottom end of the pressing cylinder is positioned in the first cavity, the top end of the pressing cylinder is positioned in the cylinder body of the quick-opening blind plate, and the filter element is fixed in the second cavity; the pressing mechanism is arranged in the cylinder body of the quick-opening blind plate and is used for pressing the pressing cylinder and the filter element;

the pressing cylinder is provided with a vent hole, the filter element is provided with a plurality of filter holes, the pressing cylinder and the middle part of the filter element in a hollow structure form a filter channel, the filter channel is communicated with the sand storage cavity of the lower end socket, and an annular air outlet cavity is arranged between the inner wall of the second cavity and the outer wall of the filter element;

a sealing element is arranged on the side wall of the top of the filter element, and a sealing element is arranged on the side wall of the bottom of the filter element;

an air inlet is formed in the side wall of the top of the sleeve, an air outlet is formed in the side wall of the bottom of the sleeve, the air inlet is communicated with the first cavity, and the air outlet is communicated with the annular air outlet cavity;

the shale gas passes through the air inlet, the pressing cylinder, the filter element, the annular air outlet cavity and the air outlet in sequence, and the sand removal of the shale gas is realized.

2. The vertical filtering desander as claimed in claim 1, wherein the pressing mechanism comprises a pressing cylinder connecting ring, a supporting block and a forward connecting screw, the pressing cylinder connecting ring is welded with the top end of the pressing cylinder, and a plurality of supporting blocks are circumferentially welded on the inner wall of the cylinder body of the quick-opening blind plate;

the pressure cylinder connecting ring is provided with a plurality of first threaded holes, each supporting block is provided with a second threaded hole, the forward connecting screw is connected between the first threaded hole and the second threaded hole, and pressure adjustment of the pressure cylinder is achieved by adjusting the forward connecting screw.

3. The vertical filter desander as claimed in claim 2 further comprising reverse connection screws, wherein the connecting ring of the pressing drum is further provided with at least two third threaded holes, the third threaded holes are located above the supporting block, and the reverse connection screws are connected to the third threaded holes.

4. The vertical filtering desander as claimed in claim 1, wherein the bottom of the first cavity is provided with a first step, a second step and a third step in sequence;

a plurality of vent holes are formed in the pressing cylinder positioned in the first cavity, an annular air inlet cavity is formed between the outer wall of the pressing cylinder and the inner wall of the first cavity, the bottom of the pressing cylinder is positioned at the second step, and the first step increases the volume of the annular air inlet cavity;

a limiting ring is arranged at the top end of the filter element and is positioned at the third step; the sealing element that sets up on the lateral wall at filter core top is the first sealing washer that sets up in spacing ring and third step lateral wall department to will annular air inlet cavity with seal between the annular air outlet cavity.

5. The vertical filter desander as recited in claim 4 wherein a partial thickened section is provided on the platen wall adjacent to the vent.

6. The vertical filtering desander as claimed in claim 4 wherein the top of the second cavity is provided with a reducer section, and the bottom of the second cavity is provided with a fourth step and a fifth step in sequence;

the arrangement of the reducing section and the fourth step enables the annular air outlet cavity to be formed between the inner wall of the second cavity and the outer wall of the filter element;

a positioning ring is arranged at the bottom of the filter element, a first annular boss is arranged at the upper part of the positioning ring, and the first annular boss is clamped at the fifth step; the sealing element arranged on the side wall of the bottom of the filter element is a second sealing ring arranged between the positioning ring and the side wall of the fifth step.

7. The vertical filtering desander as recited in claim 1 wherein a backwash opening is further provided at the bottom of the sleeve, the backwash opening being in communication with the annular outlet chamber.

8. The vertical filtering desander as recited in claim 1 wherein a drain port is further provided in the bottom of the sleeve, said drain port being in communication with the annular outlet chamber.

9. The vertical filter desander as recited in claim 4 wherein said sleeve top is further provided with a first differential gauge port, said first differential gauge port communicating with said annular inlet chamber;

and a second differential pressure gauge port is also arranged at the bottom of the sleeve and communicated with the annular air outlet cavity.

10. The vertical filtering desander as claimed in claim 1 wherein the lower head is welded, screwed or integrally formed on the bottom end surface of the sleeve.

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