Synthesis gas pre-wash tank

Abstract

The present invention relates to a synthesis gas pre-washing tank, which comprises an outer shell, a crude synthesis gas inlet is arranged on the top of the outer shell, and a down pipe is vertically installed in the outer shell; a water inlet chamber is also installed in the outer shell, the water inlet chamber is located between the crude synthesis gas inlet and the down pipe, and the water inlet chamber is connected to the crude synthesis gas inlet through a flange; the water inlet chamber comprises an outer wall and a water dispersion ring, the water dispersion ring is arranged in the outer wall, the upper ends of the outer wall and the water dispersion ring are respectively connected to the flange, and an annular cavity is formed between the outer wall, the water dispersion ring and the flange, a partition is installed in the annular cavity, and the annular cavity is divided into a non-swirl cavity and a swirl cavity by the partition, and the lower end of the outer wall is connected to the down pipe; a plurality of water dispersion holes are distributed around the water dispersion ring, and the non-swirl cavity is connected to the inner cavity of the water dispersion ring through the water dispersion holes, the inner cavity of the water dispersion ring is connected to the crude synthesis gas inlet and the down pipe, a gap is left between the lower end of the outer wall and the lower end of the water dispersion ring, and the swirl cavity is connected to the down pipe through the gap.

Description

Technical Field

[0001] The invention relates to chemical equipment, in particular to a synthesis gas pre-washing tank. Background Art

[0002] In the oil refining process, the coking process will produce crude synthesis gas, which contains some impurities, such as acidic gas, fine ash, etc., and needs to be washed before it can be sent to the next process. Usually, a washing tower is used to complete this task, but the washing efficiency is low.

[0003] Patent: CN109504470A "A quenching water assembly with dust-containing synthetic gas washing function" divides the quenching water into two streams, one stream enters the downcomer to form an inner water film, and the other stream goes outside the downcomer to form an outer water film. In fact, the outer water film also rotates and flows downward, and will cling to the inner wall of the water film protection tube (its part number is 12), but not to the outer wall of the downcomer, so it cannot achieve the best cooling effect. Moreover, it is the high-temperature synthetic gas in the downcomer that damages the downcomer, and the water film protection outside the tube can hardly play much role. In addition, the water film uniform distribution partition (its part number is 10) and the water film diffusion plate (its part number is 11) of CN 109504470A are actually ineffective, because the rotating water film will immediately fly outward when it comes to the place where there is no water film protection tube bundle. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a synthesis gas pre-wash tank.

[0005] The technical solution of the present invention:

[0006] A synthesis gas pre-wash tank, the synthesis gas pre-wash tank comprising an outer shell, the top of the outer shell is provided with a crude synthesis gas inlet, the upper side wall is provided with a synthesis gas outlet, the lower side wall is provided with a black water outlet, and a down pipe is vertically installed in the outer shell; a water inlet chamber is also installed in the outer shell, the water inlet chamber is located between the crude synthesis gas inlet and the down pipe, and is respectively connected to the crude synthesis gas inlet and the down pipe, and the water inlet chamber is connected to the crude synthesis gas inlet through a flange.

[0007] The water inlet chamber includes an outer wall and a water dispersion ring. The water dispersion ring is placed inside the outer wall. The upper ends of the outer wall and the water dispersion ring are respectively connected to the flange. An annular cavity is formed between the outer wall, the water dispersion ring and the flange. A partition is installed in the annular cavity, and the annular cavity is divided into a non-swirl cavity and a swirl cavity by the partition. The lower end of the outer wall is connected to the downcomer; a plurality of water dispersion holes are distributed around the water dispersion ring, and the non-swirl cavity is connected to the inner cavity of the water dispersion ring through the water dispersion holes. The inner cavity of the water dispersion ring is connected to the crude synthesis gas inlet and the downcomer. A gap is left between the lower end of the outer wall and the lower end of the water dispersion ring, and the swirl cavity and the downcomer are connected through the gap; a plurality of first quenching water inlets and a plurality of second quenching water inlets are arranged on the outer shell. The first quenching water inlet is connected to the non-swirl cavity, and the second quenching water inlet is connected to the swirl cavity through a connecting pipe; the connecting pipe is inserted into the swirl cavity along the tangential direction.

[0008] When it is used, the crude synthesis gas is added from the crude synthesis gas inlet, passes through the water dispersion ring and the downcomer in turn, and finally flows into the liquid outside the tube from the outlet of the downcomer. The gas after washing escapes from the water surface and flows away from the synthesis gas outlet; the quenching water is divided into two paths, one of which enters the non-swirl chamber and is sprayed out from the water dispersion hole to form fine water droplets that mix with the high-temperature synthesis gas. The water-gas mixing not only has a cooling effect, but also makes the fine ash particles adhere to the water droplets and descend with the air flow, that is, a washing process. In this process, a large amount of impurities are sucked into the water droplets; one path enters the tangential swirl chamber to form a swirl. Under the dual effects of centrifugal force and gravity, it spirals downward close to the downcomer wall to form a layer of flowing water film close to the wall of the tube, which cools down and protects the downcomer wall from damage by the high-temperature synthesis gas.

[0009] Considering that, under working conditions, there is a certain amount of liquid in the downcomer, and the liquid level in the tube is much lower than the liquid level outside the tube, this level difference is used to balance the pressure difference between the gas inlet and the gas outlet; when the gas enters the outside of the tube, many large bubbles will be generated, that is, a violent boiling state will appear; and this violent boiling state is not conducive to the sinking of the washings, so we must try to reduce the boiling degree of the liquid outside the tube.

[0010] Furthermore, the lower port of the downcomer, i.e. the outlet of the downcomer, is serrated; and the first bubble breaking is performed at the outlet.

[0011] A number of water film outlets are distributed around the lower part of the downcomer; the water film outlet is inclined downward to form an angle of 30° with the downcomer and at a 90° angle with the radial direction of the downcomer, that is, it is installed tangentially, and the water film outlet is in a three-dimensional spatial shape, and its direction coincides with the composite direction of the water flow rotation speed and the descending speed; this prevents the water film from interfering with the first bubble breaking (the saw teeth that protect the water from passing through the downcomer outlet leave the downcomer. If a large amount of water flows through the saw teeth, the sharpness of the saw teeth will be reduced, and the cutting effect on the bubbles will be reduced. When no water flows through, the cutting work of the saw teeth will not be disturbed, and the cutting efficiency will be higher).

[0012] Furthermore, a plurality of bubble cutters are installed between the shell and the downcomer from top to bottom, and the bubble cutters are located below the syngas outlet and above the lower port of the downcomer; the bubble cutters are used to perform a second bubble breaking.

[0013] A number of angle steels are installed around the outside of the downcomer, and both ends of the angle steels are connected to the outer shell and the downcomer respectively, dividing a plane into a number of sectors to form a number of sector frames. Each sector frame is installed with a number of bubble breaking strips, which together constitute the bubble cutter. The bubble breaking strips are angle steels made of steel plates with an angle of 60°; each side of the angle steel is serrated.

[0014] There are five fan-shaped frames in total; adjacent bubble cutters are staggered by 90°.

[0015] The secondary bubble crushing effectively cuts the large bubbles into small ones, making the liquid outside the downcomer relatively calm and allowing the washed impurities to settle downwards faster.

[0016] An anti-impact plate is installed in the shell; the anti-impact plate faces the synthesis gas outlet.

[0017] The partition is formed by connecting a horizontal partition and a vertical partition; the downcomer extends into the vortex chamber through the gap between the lower end of the outer wall and the lower end of the water-scattering ring, and a gap is left between its top and the horizontal partition, and a gap is left between the inner wall and the vertical partition, forming an inverted U-shaped reversal channel in the vortex chamber; the downcomer and the connecting pipe are respectively connected to the two ends of the reversal channel; the inverted U-shaped reversal channel is conducive to the formation of a water film.

[0018] A black water outlet pipe is also installed in the shell. The black water outlet pipe is a right-angle pipe, one horizontal end of which is connected to the black water outlet and one vertical end of which extends downward to the lower part of the shell.

[0019] The bottom of the shell is in an inverted cone shape; a drain port is provided at the bottom of the shell; four ear seats are installed in a circle around the middle of the outer side of the shell; the shell is composed of an upper head, a cylinder, and an inverted cone.

[0020] The advantages of the present invention are reasonable design, ingenious conception, and the following beneficial effects:

[0021] 1. Fine water droplets are formed by quenching liquid and mixed with high-temperature synthesis gas to cool down the raw synthesis gas. In this way, combined with the traditional primary washing and secondary washing, the washing effect is better.

[0022] 2. Secondary bubble crushing: the first time, the coarser serrations at the outlet of the downcomer cut the large bubbles, and the second time, the four-layer staggered bubble separators with finer serrations further crush the bubbles, so the washing effect will be better. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the synthesis gas pre-wash tank.

[0024] Figure 2 yes Figure 1 Schematic diagram of the cross section in the AA direction.

[0025] Figure 3 yes Figure 1 Schematic diagram of the cross section along the BB direction.

[0026] Figure 4 yes Figure 1 Schematic diagram of the cross section in CC direction.

[0027] Figure 5 yes Figure 3 Schematic diagram of the cross section in DD direction.

[0028] Figure 6 yes Figure 5 Schematic diagram of direction A.

[0029] Figure 7 yes Figure 1 A partial enlarged schematic diagram.

[0030] In the figure, crude synthesis gas inlet 1, synthesis gas outlet 2, black water outlet 3, downcomer 4, water inlet chamber 5, outer wall 5-1, diffuser ring 5-2, flange 6, first quenching water inlet 7, several second quenching water inlets 8, connecting pipe 9, water film outlet 10, bubble cutter 11, fan-shaped frame 11-1, bubble breaking strip 11-2, anti-collision plate 12, horizontal partition 13, vertical partition 14, drain port 15, ear seat 16, upper head 17, cylinder 18, inverted cone 19. DETAILED DESCRIPTION

[0031] like Figure 1-6As shown, a synthesis gas pre-washing tank, the synthesis gas pre-washing tank comprises an outer shell, the top of the outer shell is provided with a crude synthesis gas inlet 1, the upper side wall is provided with a synthesis gas outlet 2, the lower side wall is provided with a black water outlet 3, and a down pipe 4 is vertically installed in the outer shell; a water inlet chamber 5 is also installed in the outer shell, the water inlet chamber 5 is located between the crude synthesis gas inlet 1 and the down pipe 4, and is respectively connected to the crude synthesis gas inlet 1 and the down pipe 4, and the water inlet chamber 5 is connected to the crude synthesis gas inlet 1 through a flange 6; the water inlet chamber 5 comprises an outer wall 5-1 and a water dispersion ring 5-2, the water dispersion ring 5-2 is placed in the outer wall 5-1, and the upper ends of the outer wall 5-1 and the water dispersion ring 5-2 are respectively connected to the flange 6, and an annular cavity is formed between the outer wall 5-1, the water dispersion ring 5-2 and the flange 6, and a A partition is provided, and the annular cavity is divided into a non-cyclonic cavity and a cyclonic cavity by the partition. The lower end of the outer wall 5-1 is connected to the downcomer 4; a plurality of water-spreading holes are arranged around the water-spreading ring 5-2, and the non-cyclonic cavity is connected to the inner cavity of the water-spreading ring 5-2 through the water-spreading holes. The inner cavity of the water-spreading ring 5-2 is connected to the crude synthesis gas inlet 1 and the downcomer 4. A gap is left between the lower end of the outer wall 5-1 and the lower end of the water-spreading ring 5-2, and the cyclonic cavity is connected to the downcomer 4 through the gap; a plurality of first quenching water inlets 7 and a plurality of second quenching water inlets 8 are arranged on the outer shell, the first quenching water inlet 7 is connected to the non-cyclonic cavity, and the second quenching water inlet 8 is connected to the cyclonic cavity through a connecting pipe 9; the connecting pipe 9 is inserted into the cyclonic cavity along the tangential direction; the lower port of the downcomer 4 is the outlet of the downcomer , which is serrated; a plurality of water film outlets 10 are arranged around the lower part of the downcomer 4; the water film outlet 10 is inclined downward to form a 30° angle with the downcomer, and at the same time, a 90° angle with the radial direction of the downcomer 10, that is, it is installed tangentially, and the water film outlet 10 is in a three-dimensional spatial state, and its direction coincides with the composite direction of the water flow rotation speed and the descending speed; a plurality of bubble cutters 11 are distributed and installed from top to bottom between the shell and the downcomer 4, and the bubble cutter 11 is located below the synthesis gas outlet 2 and above the lower port of the downcomer 4; a plurality of angle steels are distributed and installed around the outside of the downcomer 4, and the two ends of the angle steels are respectively connected to the shell and the downcomer 4, dividing a plane into a plurality of sectors to form a plurality of sector frames 11-1, each sector frame A plurality of bubble breaking strips 11-2 are installed on the frame 11-1, which together constitute the bubble cutter 11. The bubble breaking strips are angle steels made of steel plates with an angle of 60°; each side of the angle steel is serrated; there are five fan-shaped frames 11-1 in total; adjacent bubble cutters 11 are staggered by 90°; a bumper plate 12 is installed in the shell; the bumper plate 12 faces the synthesis gas outlet 2; the partition is formed by connecting a horizontal partition 13 and a vertical partition 14; the downcomer 4 extends into the cyclone chamber through the gap between the lower end of the outer wall 5-1 and the lower end of the water dispersion ring 5-2, and a gap is left between its top and the horizontal partition 13, and a gap is left between the inner wall and the vertical partition 14, forming an inverted U-shaped reversing channel in the cyclone chamber; the downcomer 4 and the connecting pipe 9 are respectively connected to the two ends of the reversing channel;The inverted U-shaped reversing channel is conducive to the formation of water film; a black water outlet pipe is also installed in the shell, and the black water outlet pipe is a right-angle pipe, one horizontal end of which is connected to the black water outlet 3, and the vertical end extends downward to the lower part of the shell; the bottom of the shell is an inverted cone; a drain port 15 is provided at the bottom of the shell; four ear seats 16 are installed around the middle of the outer side of the shell; the shell is composed of an upper head 17, a cylinder 18, and an inverted cone 19. ;

[0032] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A synthesis gas pre-wash tank, comprising a shell, a top of the shell is provided with a raw synthesis gas inlet, an upper side wall is provided with a synthesis gas outlet, a lower side wall is provided with a black water outlet, and a downcomer is vertically installed in the shell; characterized in that: A water inlet chamber is also installed in the shell, and the water inlet chamber is located between the crude synthesis gas inlet and the downcomer, and is connected to the crude synthesis gas inlet and the downcomer respectively, and the water inlet chamber is connected to the crude synthesis gas inlet through a flange; The water inlet chamber includes an outer wall and a water dispersion ring. The water dispersion ring is placed inside the outer wall. The upper ends of the outer wall and the water dispersion ring are respectively connected to the flange. An annular cavity is formed between the outer wall, the water dispersion ring and the flange. A partition is installed in the annular cavity, and the annular cavity is divided into a non-swirl cavity and a swirl cavity by the partition. The lower end of the outer wall is connected to the downcomer; a plurality of water dispersion holes are distributed around the water dispersion ring, and the non-swirl cavity is connected to the inner cavity of the water dispersion ring through the water dispersion holes. The inner cavity of the water dispersion ring is connected to the crude synthesis gas inlet and the downcomer. A gap is left between the lower end of the outer wall and the lower end of the water dispersion ring, and the swirl cavity and the downcomer are connected through the gap; a plurality of first quenching water inlets and a plurality of second quenching water inlets are arranged on the outer shell. The first quenching water inlet is connected to the non-swirl cavity, and the second quenching water inlet is connected to the swirl cavity through a connecting pipe; the connecting pipe is inserted into the swirl cavity along the tangential direction.

2. A synthesis gas pre-wash tank according to claim 1, characterized in that: The lower port of the downcomer, i.e. the outlet of the downcomer, is serrated.

3. A synthesis gas pre-wash tank according to claim 2, characterized in that: A plurality of water film outlets are distributed around the lower part of the downcomer; the water film outlets are inclined downward to form an angle of 30° with the downcomer and at an angle of 90° with the radial direction of the downcomer, that is, they are installed tangentially, and the water film outlets are in a three-dimensional spatial shape, and their direction coincides with the combined direction of the water flow rotation speed and the descending speed.

4. A synthesis gas pre-wash tank according to claim 1, characterized in that: A plurality of bubble cutters are installed between the shell and the downcomer from top to bottom, and the bubble cutters are located below the synthetic gas outlet and above the lower port of the downcomer.

5. A synthesis gas pre-wash tank according to claim 4, characterized in that: A number of angle steels are installed around the outside of the downcomer, and both ends of the angle steels are connected to the outer shell and the downcomer respectively, dividing a plane into a number of sectors to form a number of sector frames. Each sector frame is installed with a number of bubble breaking strips, which together constitute the bubble cutter. The bubble breaking strips are angle steels made of steel plates with an angle of 60°; each side of the angle steel is serrated.

6. A synthesis gas pre-wash tank according to claim 5, characterized in that: There are five fan-shaped frames in total; adjacent bubble cutters are staggered by 90°.

7. The synthesis gas pre-wash tank according to claim 1, characterized in that: An anti-impact plate is installed in the shell; the anti-impact plate faces the synthesis gas outlet.

8. The synthesis gas pre-wash tank according to claim 1, characterized in that: The partition is formed by connecting a horizontal partition and a vertical partition; the downcomer extends into the vortex chamber through the gap between the lower end of the outer wall and the lower end of the water dispersion ring, and a gap is left between its top and the horizontal partition, and a gap is left between the inner wall and the vertical partition, forming an inverted U-shaped reversal channel in the vortex chamber; the downcomer and the connecting pipe are respectively connected to the two ends of the reversal channel.

9. The synthesis gas pre-wash tank according to claim 1, characterized in that: A black water outlet pipe is also installed in the shell. The black water outlet pipe is a right-angle pipe, one horizontal end of which is connected to the black water outlet and one vertical end of which extends downward to the lower part of the shell.

10. The synthesis gas pre-wash tank according to claim 1, characterized in that: The bottom of the shell is in an inverted cone shape; a drain port is provided at the bottom of the shell; four ear seats are installed in a circle around the middle of the outer side of the shell; the shell is composed of an upper head, a cylinder, and an inverted cone.

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