CN209397166U - Purification device - Google Patents

Abstract

The utility model provides a purification device, which comprises: a cylinder, the top of which is used for connecting with a gasifier, a gas outlet is provided on a side wall near the top, and an ash outlet is provided at the bottom, and the cylinder is used for accommodating Cooling water; the descending pipe with openings at both ends is suspended in the cylinder, the top end is connected to the gasification chamber outlet of the gasifier, and the bottom end is placed in the cooling water, the descending pipe is used to transport the synthesis gas in the gasification chamber to the cooling water The spiral channel with openings at both ends is arranged in the cylinder and sandwiched between the down pipe and the inner wall of the cylinder, the top end is placed below the gas outlet, and the bottom end is placed at a preset position above the cooling water level. The channel is used to receive and purify the syngas exhausted from the cooling water. In the utility model, under the cooling action of the cooling water and the centrifugal action of the spiral channel, the fine dust-containing particles carried in the synthesis gas are effectively removed, thereby realizing the further purification of the synthesis gas, improving the dust removal effect, and ensuring the synthesis gas. of purity.

Description

Purification device

technical field

The utility model relates to the technical field of coal gasification, in particular to a purification device.

Background technique

At present, the cooling methods of coal gasification synthesis gas include: chilling process and waste boiler process, among which the entrained-bed coal gasification technology using the chilling process has been widely used.

Generally speaking, the cooling of the gasifier using the chilling process is to set a scrubbing cooling chamber (also called a chilling chamber) at the bottom of the gasification chamber, and the synthesis gas discharged from the gasification chamber is cooled by the scrubbing and cooling chamber. Specifically, a certain amount of washing and cooling water is first introduced into the washing and cooling chamber, and then the high-temperature, high-pressure, and liquid slag-containing crude synthesis gas discharged from the gasification chamber of the gasifier is transported to the washing and cooling water through a descending pipe, The crude syngas at 1200-1650°C is chilled to 200-300°C, and impurities such as liquid slag and dust are cooled and solidified into ash, which is discharged from the ash outlet at the bottom of the washing and cooling chamber. The syngas after washing, cooling and impurity removal is discharged from the washing cooling water, rising along the space between the outer wall of the downcomer and the inner wall of the washing and cooling chamber to the syngas outlet near the top of the washing and cooling chamber, and then output from the syngas outlet. into the rear system.

However, after washing, cooling and removing impurities, the syngas still carries a large number of fine dust-containing particles. During the process of the syngas rising to the washing and cooling chamber from the syngas outlet, due to the resistance of the syngas and dust-containing particles Therefore, the dust-laden particles leave the washing and cooling chamber with the syngas without being separated from the syngas, resulting in a large dedusting pressure in the post-system, and even the dust-laden gas that is not completely treated by the post-system enters the shift system, which seriously affects the activity and efficiency of the catalyst. The reaction efficiency is not conducive to the long-term, safe and stable operation of the coal gasification system.

Utility model content

In view of this, the present utility model proposes a purification device, which aims to solve the problem that the washing and cooling chamber cannot remove fine dust-containing particles in the prior art.

The utility model proposes a purification device, which comprises: a cylinder, the top of which is used to connect with a gasifier, a gas outlet is provided on the side wall near the top, and an ash outlet is provided at the bottom, and the cylinder is used for accommodating Cooling water; the descending pipe with openings at both ends is suspended in the cylinder, the top end is connected to the gasification chamber outlet of the gasifier, and the bottom end is placed in the cooling water, the descending pipe is used to transport the synthesis gas in the gasification chamber to the cooling water The spiral channel with openings at both ends is arranged in the cylinder and sandwiched between the descending pipe and the inner wall of the cylinder, the top end is placed below the gas outlet, and the bottom end is placed at a preset position above the cooling water level. The channel is used to receive and purify the syngas exhausted from the cooling water.

Further, the above purification device further includes: a spiral pipeline; wherein, the inner space of the pipeline forms a spiral channel, and the side walls on opposite sides of the pipeline are respectively connected with the outer wall of the descending pipe and the inner wall of the cylinder in a one-to-one correspondence.

Further, the above-mentioned purification device also includes: two spiral plates arranged in parallel; wherein, the two opposite sides of each spiral plate are respectively connected with the outer wall of the descending pipe and the inner wall of the cylinder in a one-to-one correspondence, and the two spiral plates are connected in one-to-one correspondence. The plate, the outer wall of the descending pipe and the inner wall of the cylinder are surrounded by a spiral channel.

Further, in the above purification device, along the height direction of the cylinder, the distance between two adjacent helical layers in the helical channel is 1 to 2 times the diameter of the descending pipe.

Further, in the above purification device, the bottom wall of the spiral channel is inclined from the inner wall of the cylinder to the descending pipe, and the height of the bottom wall of the helical channel at the inner wall of the cylinder is higher than that at the descending pipe.

Further, the above purification device further includes: a spray mechanism, which is arranged on the cylinder body and corresponds to the top of the spiral channel, and is used for conveying the spray water into the spiral channel.

Further, in the above purification device, the spray mechanism includes: a spray pipe and a spray atomization nozzle; wherein, the spray pipe is penetrated through the side wall of the cylinder body and partially placed in the cylinder body, and the inlet of the spray pipe is placed in the cylinder body. Outside the cylinder, the outlet of the spray pipe corresponds to the top of the spiral channel; the spray atomization nozzle is connected to the outlet of the spray pipe.

Further, the above purification device further includes: a bubble breaking mechanism, which is arranged at the bottom end of the spiral channel and is used for eliminating bubbles in the synthesis gas.

Further, in the above purification device, the bubble breaking mechanism is a wire mesh or a bubble breaking strip.

Further, the above-mentioned purification device also includes: a conical gas distribution plate; wherein, the conical top end of the gas distribution plate is connected with the bottom end of the descending pipe, the conical bottom end of the gas distribution plate is connected with the inner wall of the cylinder, and the gas distribution The board is provided with a plurality of through holes.

In the utility model, the liquid slag and part of the dust-containing particles in the synthesis gas are solidified and separated by transporting the synthesis gas to the cooling water in the cylinder, which plays the role of purifying and separating the synthesis gas for the first time. It is transported to the spiral channel, and the fine dust-containing particles mixed in the syngas are separated out by the centrifugal force during the ascending process, and the spiral channel can effectively increase the speed of the syngas and prolong the stroke of the syngas, so as to better realize the The further purification of the syngas effectively removes the fine dust-containing particles carried in the syngas, improves the dust removal effect, ensures the purity of the syngas, and solves the problem that the washing and cooling chamber cannot remove the fine dust-containing particles in the prior art , thereby ensuring the normal operation of the rear system, thereby ensuring the stable operation of the coal gasification system.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are only for the purpose of illustrating the preferred embodiments, and are not considered to be a limitation of the present invention. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

1 is a schematic structural diagram of a purification device provided by an embodiment of the present invention;

Fig. 2 is another structural schematic diagram of the purification device provided by the embodiment of the present invention;

Fig. 3 is another structural schematic diagram of the purification device provided by the embodiment of the present invention;

FIG. 4 is a schematic top-view structural diagram of a gas distribution plate in a purification device provided by an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Referring to FIG. 1 , FIG. 1 is a schematic structural diagram of a purification device provided by an embodiment of the present invention. As shown in the figure, the purification device includes: a cylindrical body 1 , a descending pipe 2 and a spiral channel 3 . Wherein, the top of the cylindrical body 1 (the upper part shown in FIG. 1 ) is used for connecting with the gasifier, and more specifically, the top of the cylindrical body 1 is connected with the gasification chamber of the gasifier. A gas outlet 11 is provided on the side wall of the cylinder body 1 near the top, and the gas outlet 11 is used for outputting the purified synthesis gas. The bottom of the cylinder body 1 is provided with an ash outlet 12, the cylinder body 1 is used to accommodate the cooling water 4, the cooling water 4 is placed at the bottom of the cylinder body 1, and the volume of the cooling water 4 in the cylinder body 1 can be determined according to the actual situation , this embodiment does not impose any limitation on this.

Both ends of the descending pipe 2 are open ends, the descending pipe 2 is suspended in the cylinder 1, and the top of the descending pipe 2 (the upper end shown in FIG. 1 ) is connected to the outlet of the gasification chamber of the gasifier, then the descending pipe The top end of 2 is used to receive the syngas output from the gasification chamber. At this time, the syngas is high temperature and high pressure and is mixed with liquid slag and a large number of dust particles. The bottom end of the descending pipe 2 (the lower end shown in FIG. 1 ) is a free end, and the bottom end of the descending pipe 2 is placed in the cooling water 4 , and the descending pipe 2 is used to transport the synthesis gas in the gasification chamber to the cooling water 4 middle. The cooling water 4 is used to cool down the synthesis gas, so that the liquid slag mixed in the synthesis gas is cooled and solidified, and some dust-containing particles are also precipitated to form ash. The ash is discharged from the ash outlet 12 , and the synthesis gas is discharged from the cooling water 4 .

Both ends of the spiral channel 3 are open ends, the spiral channel 3 is arranged in the cylindrical body 1 , and the spiral channel 3 is sandwiched between the outer wall of the descending pipe 2 and the inner wall of the cylindrical body 1 . The top end 31 of the spiral channel 3 (the upper end shown in FIG. 1 ) extends to the top of the cylinder 1 and is placed below the gas outlet 11 (relative to FIG. 1 ), and the bottom end 32 of the spiral channel 3 (shown in FIG. 1 ) The lower end) extends to the bottom of the cylinder 1 and is placed at a preset position above the liquid level of the cooling water 4, and the spiral channel 3 is used to receive and purify the synthesis gas discharged from the cooling water 4, so as to remove the mixed gas from the synthesis gas. Fine dust particles are separated out. Specifically, the spiral channel 3 is spirally arranged in the cylindrical body 1 along the height direction of the cylindrical body 1 (the direction from top to bottom shown in FIG. 1 ), that is, the spiral channel 3 is spirally wound along the descending pipe 2 , The side walls on the opposite sides of the spiral channel 3 are respectively connected with the outer wall of the descending pipe 2 and the inner wall of the cylinder 1 in a one-to-one correspondence, then the spiral channel 3 seals the space between the outer wall of the descending pipe 2 and the inner wall of the cylinder 1 . Blocking, so that the synthesis gas discharged from the cooling water 4 is transported into the spiral channel 3, to prevent the synthesis gas from moving to the top of the barrel 1 from the gap between the outer wall of the down pipe 2, the inner wall of the barrel 1 and the spiral channel 3 until it is discharged from the gas outlet 11 . The top end 31 and the bottom end 32 of the spiral channel 3 are both free ends, and the top end of the spiral channel 3 is disposed close to the gas outlet 11 and placed below the gas outlet 11 .

The principle of the helical channel 3 for purifying the syngas is: on the one hand, the syngas and the dust-containing particles are separated by different centrifugal forces due to the different specific gravity of the syngas and the dust-containing particles in the spiral channel 3, such as: The syngas discharged from the cooling water 4 is mixed with dust-containing particles wrapped by a water film. Due to the large gravity, these dust-containing particles will be thrown into the spiral channel 3 under the influence of centrifugal force during the spiral upward process. On the wall surface of the spiral channel 3, after the dust-containing particles on the wall surface of the spiral channel 3 gradually gather, under the action of gravity, the dust-containing particles slide down the spiral channel 3 and finally fall into the cooling water 4, so that the synthesis gas and the dust-containing particles are separated. To achieve the purpose of further purification of syngas. On the other hand, the space of the syngas ascending passage is changed from the space in the cylinder 1 except the descending pipe 2 in the prior art to the spiral passage 3. Since the inner diameter of the helical passage 3 is smaller than that of the cylinder 1, the syngas flows through The diameter of the spiral channel 3 is reduced and the flow rate is accelerated, which will further increase the centrifugal force on the syngas and the dust-containing particles, and further separate the dust-containing particles from the syngas. On the other hand, the spiral channel 3 also effectively increases the ascending stroke of the syngas, which is beneficial to better separation of the syngas and dust-containing particles.

The bottom end 32 of the spiral channel 3 is placed at a preset position above the liquid level of the cooling water 4, that is to say, there is a preset distance between the bottom end 32 and the liquid level of the cooling water 4, and the preset distance can be based on the actual situation. It is determined that this embodiment does not impose any limitation on this. However, if the distance between the bottom end 32 of the spiral channel 3 and the liquid level of the cooling water 4 is too small, more water and large particles of ash are carried by the syngas, which increases the separation burden of the spiral channel 3; The distance between the bottom end 32 of the cooling water 4 and the liquid level of the cooling water 4 is too large, and the effective distance of the spiral channel 3 is shortened, which affects the separation effect. The preset distance should enable a large amount of water and large particle ash carried by the syngas to return to the cooling water 4 due to gravity, so that the syngas entrained with fine dust is transported to the spiral channel 3 for further separation. Preferably, the distance between the bottom end 32 of the spiral channel 3 and the liquid level of the cooling water 4 is 0.5-1 m.

During specific implementation, in order to ensure that the dust-containing particles slide smoothly from the spiral channel 3 to the cooling water 4 , the inner wall of the spiral channel 3 is smoothly arranged.

In specific implementation, a chilling ring 7 is provided in the cylinder body 1 near the top, and the chilling ring 7 is connected with the top of the descending pipe 2. The chilling ring 7 is used to deliver chilled water into the descending pipe 2 to cool the descending pipe. The syngas transported in 2 and the liquid slag and dust-laden particles mixed in the syngas are pre-cooled.

During operation, the syngas in the gasification chamber of the gasifier is transported to the downcomer 2 through the outlet of the gasification chamber. At this time, the syngas is high temperature, high pressure and mixed with liquid slag and a large number of dust-containing particles. The downpipe 2 transports the syngas to the cooling water 4 in the cylinder 1, the syngas is cooled in the cooling water 4, and the liquid slag mixed in the syngas is cooled and solidified, and the part mixed with the syngas contains dust Particles also precipitate from the syngas and eventually form ash with the solidified slag, which is discharged from the ash outlet 12 . The syngas moves upwards from the cooling water 4 and floats out of the liquid surface of the cooling water 4 , and is then transported into the spiral channel 3 from the bottom end 32 of the spiral channel 3 . During this conveying process, part of the syngas will rise to the top of the cylinder 1 after leaving the cooling water 4, but since the spiral channel 3 is sandwiched between the outer wall of the down pipe 2 and the inner wall of the cylinder 1, the spiral channel 3 The space between the outer wall of the descending pipe 2 and the inner wall of the cylinder body 1 is blocked to prevent the upward movement of the synthesis gas, and the synthesis gas is finally transported into the spiral channel 3 . The syngas delivered to the spiral channel 3 is mixed with a large number of fine dust-containing particles. In the spiral channel 3, the syngas and the dust-containing particles rise in a spiral shape. After being thrown onto the wall surface of the spiral channel 3, the dust-containing particles on the wall surface of the spiral channel 3 gradually gather, and then fall into the cooling water 4 along the spiral channel 3 under the action of gravity, so that the synthesis gas and the dust-containing particles are separated and further purified. Syngas. The syngas with dust particles removed is output from the top 31 of the spiral channel 3 , continues to move upward in the cylinder 1 , and is finally output from the gas outlet 11 .

It can be seen that in this embodiment, the syngas is transported to the cooling water 4 in the cylinder 1 to solidify and separate the liquid slag and some dust-containing particles in the syngas, which plays an important role in the purification and separation of the syngas for the first time. The synthetic gas after the initial purification is transported to the spiral channel 3, and the fine dust-containing particles mixed in the synthesis gas are separated by the centrifugal force during the ascending process, and the spiral channel 3 can effectively increase the speed of the synthesis gas and prolong the synthesis Therefore, the further purification of the syngas can be better achieved, the fine dust-containing particles carried in the syngas are effectively removed, the dust removal effect is improved, the purity of the syngas is ensured, and the problem of washing and cooling in the prior art is solved. The problem that the chamber cannot remove fine dust-containing particles, thereby ensuring the normal operation of the rear system, thus ensuring the stable operation of the coal gasification system.

A preferred structure of the helical channel is shown in this embodiment. The purification device may also include: a pipeline. Wherein, the pipeline is helical, and the pipeline is spirally wound between the outer wall of the descending pipe 2 and the inner wall of the cylinder 1 along the height direction of the cylinder 1, and the inner space of the pipeline forms a spiral channel 3. The side walls on the opposite sides of the pipeline are respectively connected with the outer wall of the down pipe 2 and the inner wall of the cylinder 1 in a one-to-one correspondence. The radial distance is equal to the distance between the outer wall of the down pipe 2 and the inner wall of the cylinder 1, then the side wall of one side of the pipe is in contact and connected with the outer wall of the down pipe 2, and the side of the opposite side of the pipe The wall is in contact with and connected to the inner wall of the cylinder 1 .

In specific implementation, the connection between the pipeline and the outer wall of the down pipe 2 and the inner wall of the cylinder 1 may be welded connection, and of course other connection methods, which are not limited in this embodiment.

It can be seen that, in this embodiment, the helical channel 3 is formed through the inner space of the helical pipe, which has a simple structure and is easy to implement.

Another preferred structure of the helical channel is shown in this embodiment. The purification device may also include: two spiral plates. Wherein, the two spiral plates are arranged side by side, and each spiral plate is spirally wound along the height direction of the cylindrical body 1 and between the outer wall of the descending pipe 2 and the inner wall of the cylindrical body 1 . There is a preset distance between the two spiral plates. Compared with FIG. 1 , the two spiral plates are arranged up and down. During specific implementation, the preset distance may be determined according to the actual situation, which is not limited in this embodiment.

The two opposite sides of each spiral plate are respectively connected with the outer wall of the descending pipe 2 and the inner wall of the cylindrical body 1 in a one-to-one correspondence, that is to say, each spiral plate is transversely arranged on the outer wall of the descending pipe 2 and the cylindrical body 1 Between the inner walls of each spiral plate, one of the sides of each spiral plate is in contact with and connected with the outer wall of the descending pipe 2, and the other side of each spiral plate opposite to it is in contact with and connected with the inner wall of the cylinder 1. . The two spiral plates, the outer wall of the descending pipe 2 and the inner wall of the cylinder body 1 enclose a helical space, and the helical space is the helical channel 3 .

In specific implementation, the connection between each spiral plate and the outer wall of the down pipe 2 and the inner wall of the cylinder 1 may be welded connection, and of course other connection methods, which are not limited in this embodiment.

In specific implementation, each spiral plate may be an integral spiral plate, or may be formed by connecting a plurality of spiral plates in sequence. When the spiral plate is composed of a plurality of spiral plates, the spiral plates can be fixed by means of rivet connection, welding connection, or the like.

It can be seen that, in this embodiment, the spiral channel 3 is formed by the space enclosed by the two parallel spiral plates, the descending pipe 2 and the inner wall of the cylinder 1, which has a simple structure and is easy to implement.

Continuing to refer to FIG. 1 , in the above embodiments, along the height direction of the cylinder 1 , the distance between two adjacent helical layers in the helical channel 3 is 1-2 times the diameter of the descending pipe 2 . Specifically, referring to FIG. 1 , on the section of the cylinder body 1 in the height direction, since the spiral channel 3 is wound in a spiral shape, the positions of the spiral channel 3 on one side of the section of the cylinder body 1 appear at intervals, as shown in the figure In the display of the spiral channel 3 shown on the left side of the cylinder body 1 in 1, the distance between the adjacent upper and lower layers of the spiral channel 3 at one side of the section of the cylinder body 1 is denoted as L, and this L is 1 of the diameter of the descending pipe 2. ~2 times.

If the distance between the two adjacent helical layers in the spiral channel 3 is too large, the cross-sectional area of the spiral channel 3 is too large, and the speed of the syngas is too slow. The centrifugal effect is not obvious, and the purification and dust removal effect is poor; if the distance between the adjacent two spiral layers in the spiral channel 3 is too small, the cross-sectional area of the spiral channel 3 is too small, and the speed of the synthesis gas is too fast, although the centrifugal effect is more efficient. It is obvious, but the impact vibration force of the syngas in the spiral channel 3 is relatively large, which is not conducive to the structural stability of the spiral channel 3. Therefore, the distance between the two adjacent spiral layers in the spiral channel 3 is the diameter of the down pipe 2. 1 to 2 times higher than that, which can effectively ensure a reasonable airflow velocity of the synthesis gas in the spiral channel 3, ensure the effect of centrifugal action, and improve the efficiency of separation and purification.

Continuing to refer to FIG. 1 , in the above-mentioned embodiments, the bottom wall of the spiral channel 3 is inclined from the inner wall of the cylindrical body 1 to the descending pipe 2 , and the height of the bottom wall of the spiral channel 3 at the inner wall of the cylindrical body 1 is higher than that at the inner wall of the cylindrical body 1 . The height of the descending pipe 2, that is, the position of the bottom wall of the spiral channel 3 at the inner wall of the cylinder 1 is higher, and the position of the bottom wall of the spiral channel 3 at the descending pipe 2 is lower. Wherein, when the spiral channel 3 is formed by a helical pipe, the side wall at the bottom of the pipe is the bottom wall; when the spiral channel 3 is two spiral plates arranged side by side, the inner wall of the descending pipe 2 and the inner wall of the cylinder 1 are surrounded by When completed, the spiral plate placed below the two spiral plates is the bottom wall of the spiral channel 3 .

It can be seen that in this embodiment, the bottom wall of the spiral channel 3 is inclined to facilitate the collection of the separated dust-containing particles, so as to prevent the dust-containing particles from covering the entire spiral channel 3, and the collected dust-containing particles can flow more smoothly along the spiral channel 3. The spiral channel 3 slides down into the cooling water 4 .

Referring to FIG. 2, FIG. 2 is another schematic structural diagram of the purification device provided by the embodiment of the present invention. As shown in the figures, in the above embodiments, the purification device may further include: a spray mechanism 5 . Wherein, the spray mechanism 5 is arranged on the cylinder body 1 , and the spray mechanism 5 corresponds to the top end 31 of the spiral channel 3 , and the spray mechanism 5 is used for conveying spray water into the spiral channel 3 .

Specifically, the spray mechanism 5 may include: a spray pipe 51 and a spray atomization nozzle 52 . The spray pipe 51 penetrates through the side wall of the cylindrical body 1 , and a part of the spray pipe 51 is placed inside the cylindrical body 1 and a part is placed outside the cylindrical body 1 . The part of the spray pipe 51 placed outside the cylinder body 1 is provided with an inlet, that is, the inlet of the spray pipe 51 is placed outside the cylinder body 1 for receiving the spray water. The part of the spray pipe 51 placed in the cylinder body 1 extends toward the top end 31 of the spiral channel 3 , and this part is provided with an outlet, that is, the outlet of the spray pipe 51 corresponds to the top end 31 of the spiral channel 3 and faces the interior of the spiral channel 3 , the outlet of the spray pipe 51 is used to spray spray water into the spiral channel 3 . The spray atomizing nozzle 52 is connected to the outlet of the spray pipe 51, and the spray atomizing nozzle 52 is used to atomize the spray water, and the spray water in the spray pipe 51 is sprayed to the spray nozzle 52 through the spray atomizing nozzle 52. Inside the spiral channel 3.

It can be seen that in this embodiment, the spray mechanism 5 sprays spray water into the spiral channel 3, that is, the synthesis gas in the spiral channel 3 is cooled and sprayed, and the humidity of the synthesis gas is increased, and the inclusion of the synthesis gas is small. The dust-containing particles and dust are combined with the atomized water droplets of the spray water. After the combination, the weight of the dust-containing particles and dust increases, and they flow into the cooling water 4 along the wall of the spiral channel 3 under the action of gravity, so that the syngas is further Separation from dust-laden particles and dust for purification. In addition, the sprayed water can also wash the dust-containing particles in the spiral channel 3 that are separated and adhered to the inner wall of the spiral channel 3 by centrifugal force, so that the dust-containing particles can be better returned to the cooling water 4 . In addition, when the bottom wall of the spiral channel 3 is inclined, the dust-containing particles and dust combine with the atomized water droplets and flow downward along the side of the spiral channel 3 close to the descending pipe 2. During this process, the inner wall of the descending pipe 2 is formed. A layer of water film, the water film can effectively protect the downcomer 2 and avoid the ablation of the downcomer 2 caused by the temperature of the syngas in the downcomer 2 overheating.

In the above embodiments, the purification device may further include: a bubble breaking mechanism. Wherein, the bubble breaking mechanism is arranged at the bottom end 32 of the spiral channel 3, and the bubble breaking mechanism is used to eliminate the bubbles in the synthesis gas. Specifically, the bubble breaking mechanism is connected with the inner wall of the bottom end 32 of the spiral channel 3 . Preferably, the bubble breaking mechanism is a wire mesh or a bubble breaking strip.

It can be seen that in this embodiment, by setting the bubble breaking mechanism at the bottom end of the spiral channel 3, the bubbles carried by the synthesis gas discharged from the cooling water 4 can be cut and broken more effectively, and the water film wraps the bubbles after the bubbles are broken. The dust-containing particles are uniformly wetted, and the weight after wetting increases, which is more conducive to the separation in the spiral channel 3, avoiding the dust-containing particles wrapped by the air bubbles and the bubbles are broken after centrifugation. The top of the spiral channel 3 further increases the problem of separation difficulty.

Referring to FIG. 3 and FIG. 4 , in each of the above embodiments, the purification device may further include: a gas distribution plate 6 . Among them, the gas distribution plate 6 is tapered. The cone top end (the upper end shown in FIG. 3 ) of the gas distribution plate 6 is connected with the bottom end of the descending pipe 2 , and the cone bottom end (the lower end shown in FIG. 3 ) of the gas distribution plate 6 is connected with the inner wall of the cylinder body 1 , The gas distribution plate 6 is provided with a plurality of through holes 61 . Specifically, the top of the cone of the gas distribution plate 6 is an open end, the top of the cone is sleeved on the outside of the descending pipe 2 and is connected to the outer wall of the descending pipe 2 , the connection method of the gas distribution plate 6 with the descending pipe 2 and the cylinder 1 It may be a welding connection, and of course other connection manners, which are not limited in this embodiment. The through holes 61 are evenly distributed on the gas distribution plate 6 .

It can be seen that, in this embodiment, the gas distribution plate 6 can effectively block the ash and slag, so that the syngas is transported into the spiral channel 3 through the through hole 61, and the ash and slag are blocked at the bottom of the cylinder 1, and the To the auxiliary role of purification separation.

To sum up, in this embodiment, the syngas is transported to the cooling water 4 in the cylinder 1 to solidify and separate the liquid slag and some dust-containing particles in the syngas, which is the first time to purify and separate the syngas. The role of the primary purification syngas in the process of the spiral channel 3 rising by centrifugal force to separate the fine dust particles mixed in the syngas, and the spiral channel 3 can effectively increase the speed of the syngas, prolong the syngas Therefore, the further purification of the syngas can be better achieved, the fine dust-containing particles carried in the syngas are effectively removed, the dust removal effect is improved, and the purity of the syngas is guaranteed, thereby ensuring the stable operation of the coal gasification system. .

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalents, the present utility model is also intended to include these modifications and variations.

Claims (10)

1. a purification device, is characterized in that, comprises: A cylinder (1), the top of which is used to connect with the gasifier, a gas outlet (11) is provided on the side wall near the top, and an ash outlet (12) is provided at the bottom, and the cylinder (1) is used for Accommodating cooling water (4); A descending pipe (2) with openings at both ends is suspended in the cylinder (1), the top end is connected to the gasification chamber outlet of the gasifier, and the bottom end is placed in the cooling water (4), The downcomer (2) is used to transport the synthesis gas in the gasification chamber to the cooling water (4); A helical channel (3) open at both ends is arranged in the cylinder (1) and sandwiched between the descending pipe (2) and the inner wall of the cylinder (1), and the top end (31) is placed on the inner wall of the cylinder (1). Below the gas outlet (11), the bottom end (32) is placed at a preset position above the liquid level of the cooling water (4), and the spiral channel (3) is used to receive and purify the cooling water Syngas exhausted in (4). 2. The purification device according to claim 1, characterized in that, further comprising: a spiral pipe; wherein, The inner space of the pipe forms the helical channel (3), and the side walls on opposite sides of the pipe are in one-to-one correspondence with the outer wall of the descending pipe (2) and the inner wall of the cylinder (1). connect. 3. The purification device according to claim 1, further comprising: two spiral plates arranged in parallel; wherein, The two opposite sides of each of the spiral plates are respectively connected with the outer wall of the descending pipe (2) and the inner wall of the cylinder (1) in a one-to-one correspondence. The outer wall of (2) and the inner wall of the cylinder (1) surround the spiral channel (3). 4. The purification device according to claim 1, characterized in that, along the height direction of the cylinder (1), the distance between two adjacent helical layers in the helical channel (3) is the descending distance 1 to 2 times the diameter of the tube (2). 5. The purification device according to claim 1, wherein the bottom wall of the spiral channel (3) is inclined from the inner wall of the cylinder (1) to the descending pipe (2), and, The height of the bottom wall of the helical channel (3) at the inner wall of the cylinder (1) is higher than that at the descending pipe (2). 6. The purification device according to any one of claims 1 to 5, characterized in that, further comprising: The spray mechanism (5) is arranged on the cylinder body (1) and corresponds to the top end of the spiral channel (3), and is used for conveying spray water into the spiral channel (3). 7. The purification device according to claim 6, wherein the spray mechanism (5) comprises: a spray pipe (51) and a spray atomization nozzle (52); wherein, The spray pipe (51) is penetrated through the side wall of the cylindrical body (1) and partially placed in the cylindrical body (1), and the inlet of the spray pipe (51) is placed in the cylindrical body (1), the outlet of the spray pipe (51) corresponds to the top of the spiral channel (3); The spray atomization nozzle (52) is connected to the outlet of the spray pipe (51). 8. The purification device according to any one of claims 1 to 5, further comprising: The bubble breaking mechanism is arranged at the bottom end of the helical channel (3), and is used for eliminating the bubbles in the synthesis gas. 9 . The purification device according to claim 8 , wherein the bubble breaking mechanism is a wire mesh or a bubble breaking strip. 10 . 10. The purification device according to any one of claims 1 to 5, characterized in that, further comprising: a conical gas distribution plate (6); wherein, The conical top end of the gas distribution plate (6) is connected with the bottom end of the descending pipe (2), and the conical bottom end of the gas distribution plate (6) is connected with the inner wall of the cylinder (1), The gas distribution plate (6) is provided with a plurality of through holes (61).