Gasification furnace synthesis gas spraying device

Abstract

The utility model discloses a gasification furnace synthesis gas spraying device which comprises a plurality of spraying holes formed in the furnace wall of a gasification furnace, and the spraying holes are not lower than the horizontal position of a synthesis gas outlet; a spraying assembly used for spraying water mist is installed in each spraying hole, one end of each spraying assembly is located in the corresponding spraying hole, the other end of each spraying assembly extends out of the outer wall of the gasification furnace and is connected with a water supply unit through a water collecting pipe, and a water regulating valve is installed on the water collecting pipe. The spraying holes are not lower than the horizontal position of the synthesis gas outlet, the spraying assembly does not extend into the gasification furnace, the spraying assembly is not prone to dust deposition and corrosion of synthesis gas, maintenance can be carried out from the outside of the gasification furnace, and the danger of operation is reduced; in addition, the spraying assembly can spray water mist, so that water can be in full contact with the synthesis gas, and the washing and deashing effects are improved.

Description

Technical Field

[0001] This application relates to the field of gasifier technology, and in particular to a syngas spraying device for a gasifier. Background Technology

[0002] In earlier gasifiers, the syngas outlet was located above the quench chamber. The high-temperature syngas generated in the gasification chamber was washed and cooled in the quench chamber, becoming syngas with a certain amount of fly ash at around 200°C, which then exited the gasifier through the syngas outlet to proceed to the next stage. After a period of operation, the fly ash in the syngas gradually accumulated in the syngas pipeline outside the gasifier, causing blockage and ultimately leading to a shutdown of the entire unit.

[0003] To improve this situation, some gasifiers have installed spray systems near the syngas outlet. These systems consist of one or two sets of pipes fixed to the inner wall of the gasifier around the syngas outlet, with perforations shaped like flutes. Water is introduced from outside the gasifier into these flutes. During operation, water is sprayed from the perforations into the syngas, thus providing some washing and ash removal. However, this structure also has some drawbacks: the water droplets exiting through the perforations are large, resulting in a small water flow coverage area and limited washing effect; ash easily accumulates on the upper part of the spray water lines inside the gasifier, causing localized ash buildup; the spray water lines, constantly in contact with syngas containing fly ash, will experience abrasion, eventually leading to wear and leaks; maintenance of the spray lines inside the gasifier is very difficult, requiring work inside the gasifier and involving high-altitude and confined space operations, posing certain risks. Utility Model Content

[0004] The purpose of this application is to overcome the shortcomings of the existing technology, such as poor washing effect, easy corrosion of spray pipelines and high maintenance difficulty, and to provide a gasifier syngas spraying device with good spraying effect, pipeline that is not easy to corrode and easy to maintain.

[0005] The technical solution of this application provides a syngas spraying device for a gasifier, including a plurality of spray holes provided on the furnace wall of the gasifier, wherein the spray holes are not lower than the horizontal position of the syngas outlet.

[0006] Each of the spray holes is equipped with a spray assembly for spraying water mist. One end of the spray assembly is located inside the spray hole, and the other end extends out of the outer wall of the gasifier and is connected to the water supply unit through a water collection pipe. A water volume regulating valve is installed on the water collection pipe.

[0007] Furthermore, the axial direction of the spray holes is gradually inclined upward in the direction from the inside to the outside of the gasifier.

[0008] Furthermore, the angle between the axial direction of the spray hole and the axial direction of the synthesis gas outlet is 15°-75°.

[0009] Furthermore, in the radial direction of the gasifier, the distance between the inner end of the spray assembly and the inner wall of the gasifier is 0mm-10mm.

[0010] Furthermore, the spray assembly includes a spray pipe that is interference-fitted into the spray hole and an atomizing nozzle installed in the spray pipe and facing the inside of the gasifier. The other end of the spray pipe extends out of the outer wall of the gasifier. The water collection pipe is connected to the spray pipe and communicates with the atomizing nozzle.

[0011] Furthermore, the atomizing nozzle includes a horizontal fan-shaped atomizing nozzle, and / or a conical atomizing nozzle, and / or a straight atomizing nozzle.

[0012] Furthermore, the end of the spray pipe extending out of the outer wall of the gasifier is provided with a first connecting flange, and the water collection pipe is provided with a second connecting flange. The first connecting flange and the second connecting flange are connected by a spherical seal, and the atomizing nozzle is connected to the water collection pipe through the spherical seal.

[0013] Furthermore, the spray holes are provided in at least two rows, with at least three spray holes in each row;

[0014] Each row of spray holes is arranged parallel to the edge of the synthesis gas outlet.

[0015] Furthermore, the spray assembly in at least two non-adjacent spray holes is connected to a water collection pipe, and each water collection pipe is provided with a water flow regulating valve.

[0016] Furthermore, it also includes a temperature detection element disposed on the wall of the syngas outlet pipe, the temperature detection element being communicatively connected to the water flow regulating valve.

[0017] The above technical solution has the following beneficial effects:

[0018] In this application, the spray holes are not lower than the horizontal position of the syngas outlet, and the spray components do not extend into the gasifier. The spray components are not prone to ash accumulation and corrosion by syngas. Furthermore, maintenance can be carried out from the outside of the gasifier, reducing the danger of the operation. In addition, the spray components can spray water mist, so that the water can fully contact the syngas, improving the washing and ash removal effect. Attached Figure Description

[0019] The disclosure of this application will become more readily understood with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. In the drawings:

[0020] Figure 1 This is a schematic diagram of the furnace wall of a gasification furnace equipped with a spraying device in one embodiment of this application;

[0021] Figure 2 This is a schematic diagram showing the connection between the spray assembly and the water collection pipe in one embodiment of this application;

[0022] Figure 3 This is a partial cross-sectional view of a spraying device in one embodiment of this application;

[0023] Figure 4 This is a partial cross-sectional view of the spray wheel device in one embodiment of this application;

[0024] Figure 5 This is a schematic diagram of a horizontal fan-shaped atomizing nozzle in one embodiment of this application;

[0025] Figure 6 This is a schematic diagram of a conical atomizing nozzle in one embodiment of this application;

[0026] Figure 7 This is a schematic diagram of a linear atomizing nozzle in one embodiment of this application.

[0027] Appendix Label Reference Table:

[0028] Spray nozzle 01, synthesis gas outlet 02;

[0029] Spray assembly 03: spray pipe 31, first connecting flange 311, atomizing nozzle 32;

[0030] Water collection pipe 04: branch pipe 41, second connecting flange 411, main pipe 42, spherical seal 43;

[0031] Water supply unit 05, water volume regulating valve 06, temperature detection device 07. Detailed Implementation

[0032] The specific embodiments of this application will be further described below with reference to the accompanying drawings.

[0033] It is readily understood that, based on the technical solution of this application, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of this application. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this application and should not be considered as the entirety of this application or as limitations or restrictions on the technical solution of the application.

[0034] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meanings of the above in this application according to the specific circumstances.

[0036] The gasifier syngas spraying device in the embodiments of this application, such as Figure 1 , 2 As shown, it includes several spray holes 01 set on the furnace wall of the gasifier, and the spray holes 01 are not lower than the horizontal position of the syngas outlet 02.

[0037] Each spray hole 01 is equipped with a spray assembly 03 for spraying water mist. One end of the spray assembly 03 is located inside the spray hole 01, and the other end extends out of the outer wall of the gasifier and is connected to the water supply unit 05 through the water collection pipe 04. A water volume regulating valve 06 is installed on the water collection pipe 04.

[0038] Specifically, the gasifier wall has a certain thickness, and spray holes 01 penetrate the gasifier wall. Each spray hole 01 is equipped with a spray assembly 03 capable of spraying water mist to remove ash from the syngas. For example... Figure 1 As shown, the spray holes 01 are all located above the syngas outlet 02, which can reduce the contact between the spray assembly 03 inside the spray holes 01 and the syngas, thereby reducing the corrosion rate.

[0039] In this configuration, one end of the spray assembly 03, which sprays water mist, is located inside the spray hole 01, while the other end extends out of the spray hole 01 and connects to the water collection pipe 04 on the outer wall of the gasifier. This arrangement prevents the spray assembly 03 from extending into the gasifier, thus avoiding the accumulation of fly ash inside the gasifier on the spray assembly 03 and affecting the spraying effect.

[0040] Meanwhile, in order to ensure the sealing effect of the gasifier, the inner wall between the spray assembly 03 and the spray hole 01 is also filled with sealing material to prevent the gap between the spray assembly 03 and the spray hole 01 from affecting the sealing of the gasifier.

[0041] One end of the spray assembly 03 extending from the gasifier wall is connected to a water collection pipe 04, which in turn is connected to a water supply unit 05, which can be a water storage tank. A water flow regulating valve 06 is installed on the water collection pipe 04 to adjust the water output of the spray assembly 03.

[0042] In this embodiment, the spray hole 01 is not lower than the horizontal position of the syngas outlet 02, and the spray assembly 03 does not extend into the gasifier. The spray assembly 03 is not prone to ash accumulation and corrosion by syngas. Moreover, maintenance can be carried out from the outside of the gasifier, reducing the danger of the operation. In addition, the spray assembly 03 can spray water mist, so that the water can fully contact the syngas, improving the washing and ash removal effect.

[0043] In one embodiment, such as Figure 3 , 4 As shown, the spray hole 01 is axially inclined upwards in the direction from the inside to the outside of the gasifier. This allows the water mist to be sprayed towards the syngas outlet 02 below, ensuring full contact between the water mist and the syngas. Furthermore, the spray hole 01 is lowest at one end of the inner wall of the gasifier, allowing fly ash to fall into the gasifier under the action of gravity and airflow, preventing it from easily accumulating inside the spray hole 01.

[0044] In one embodiment, the angle between the axial direction of the spray hole 01 and the axial direction of the synthesis gas outlet 02 is 15°-75°.

[0045] Figure 4 An example is shown where the syngas outlet 02 is axially positioned horizontally, and the spray hole 01 is axially inclined upwards. The angle α between the syngas outlet 02 and the spray hole 01 is 15°-75°. The appropriate angle can be determined based on parameters such as the gasifier wall thickness, the distance between the spray hole 01 and the syngas outlet 02, and the atomization degree of the spray.

[0046] In one embodiment, such as Figure 4 As shown, in the radial direction of the gasifier, the distance L between the inner end of the spray assembly 03 and the inner wall of the gasifier is 0mm-10mm.

[0047] In short, the inner end of the spray assembly 03 is recessed into the inner wall of the gasifier by at most 10mm to avoid excessive water mist being sprayed into the spray hole 01 due to excessive recess of the spray assembly 03, which would cause water accumulation and affect the washing effect of the syngas.

[0048] In one embodiment, such as Figure 4As shown, the spray assembly 03 includes a spray pipe 31 that is interference-fitted into the spray hole 01 and an atomizing nozzle 32 that is installed in the spray pipe 31 and faces the inside of the gasifier. The other end of the spray pipe 31 extends out of the outer wall of the gasifier. The water collection pipe 04 is connected to the spray pipe 31 and communicates with the atomizing nozzle 32.

[0049] Specifically, the spray pipe 31 is interference-fitted into the spray hole 01, and the atomizing nozzle 32 is installed inside the spray pipe 31, thereby further reducing ash accumulation in the atomizing nozzle 32. The other end of the spray pipe 31 extends out of the outer wall of the gasifier and connects to the water collection pipe 04. At the same time, the water inlet of the atomizing nozzle 32 is located at the end of the spray pipe 31 and communicates with the water collection pipe 04, so that the water collection pipe 04 supplies water to the atomizing nozzle 32.

[0050] In this embodiment of the application, the connection interface between the spray assembly 03 and the water collection pipe 04 is located outside the gasifier, allowing maintenance to be performed from outside the gasifier and reducing operational risks.

[0051] In one embodiment, the atomizing nozzle 32 includes a horizontal fan-shaped atomizing nozzle, and / or a conical atomizing nozzle, and / or a straight atomizing nozzle.

[0052] Figure 5 A schematic diagram of a horizontal fan-shaped atomizing nozzle is shown, in which the water mist is distributed in a horizontal fan shape. Figure 6 A conical atomizing nozzle is shown, which sprays water mist in a conical distribution; Figure 7 A linear atomizing nozzle is shown, which sprays water mist in a straight line.

[0053] In a spraying device, one type of atomizing nozzle 32 can be used, or multiple atomizing nozzles 32 can be used in combination. For example, three rows of spray holes 01 can be set up, with the atomizing nozzles 32 in the first row of spray holes 01 being linear atomizing nozzles, the atomizing nozzles 32 in the second row of spray holes 01 being horizontal fan-shaped atomizing nozzles, and the atomizing nozzles 32 in the third row of spray holes 01 being conical atomizing nozzles. The combination of multiple atomizing nozzles 32 enriches the state of the water mist, thereby improving the syngas scrubbing effect.

[0054] In one embodiment, such as Figure 4 As shown, the spray nozzle 31 is provided with a first connecting flange 311 at one end extending from the outer wall of the gasifier, and the water collection pipe 04 is provided with a second connecting flange 411. The first connecting flange 311 and the second connecting flange 411 are connected by a spherical seal 43, and the atomizing nozzle 32 is connected to the water collection pipe 04 through the spherical seal 43.

[0055] Specifically, the spherical seal 43 has a pipe in the middle, which is connected to the water inlet of the atomizing nozzle 32 and the inside of the water collection pipe 04. Preferably, the atomizing nozzle 32, the spherical seal 43 and the water collection pipe 04 can be configured as an integrally formed structure or as pre-connected components.

[0056] Both ends of the spherical seal 43 that connect to the first connecting flange 311 and the second connecting flange 411 are convex spherical surfaces, and the side of the first connecting flange 311 and the second connecting flange 411 that connects to the spherical seal 43 is a concave spherical surface. By the contact between the convex and concave spherical surfaces, the angle of the atomizing nozzle 32 in the spray pipe 31 can be adjusted within a small range by adjusting the contact angle between the first connecting flange 311 and the spherical seal 43.

[0057] In one embodiment, such as Figure 1 As shown, the spray holes 01 are provided in at least two rows, and each row is provided with at least three spray holes 01;

[0058] Each row of spray holes 01 is set parallel to the edge of the syngas outlet 02.

[0059] In this embodiment, the syngas outlet 02 is circular, and the spray holes 01 are arranged above it along the edge of the syngas outlet 02, with each row of spray holes 01 being semi-circular. Furthermore, each row of spray holes 01 has at least three spray holes 01, which are evenly spaced to ensure uniform washing of the syngas.

[0060] In one embodiment, such as Figure 1 , 2 As shown, at least two non-adjacent spray holes 01 have spray components 03 connected to a water collection pipe 04, and each water collection pipe 04 is provided with a water flow regulating valve 06.

[0061] Specifically, since the spray assembly 03 connected to the same water collection pipe 04 supplies water synchronously, the spray holes 01 corresponding to the spray assembly 03 connected to the same water collection pipe 04 in this embodiment are not adjacent. If a certain water collection pipe 04 fails and stops supplying water, the spray assembly 03 of the other water collection pipes 04 that are supplying water normally can also spray water mist evenly along the edge of the syngas outlet, thereby ensuring the washing effect.

[0062] like Figure 1 As shown, the two rows of spray holes 01 are divided into four groups. The spray components 03 corresponding to the spray holes 01 of the same color in the figure are connected to the same water collection pipe 04. Each group of spray holes 01 is evenly spaced along the edge of the synthesis gas outlet. Uniform spraying can be carried out when any water collection pipe 04 is connected.

[0063] like Figure 2As shown, the water collection pipe 04 includes a branch pipe 41 and a main pipe 42. Each spray assembly 03 is connected to a branch pipe 41, and each branch pipe 41 is connected to the main pipe 42. The main pipe 42 is also connected to a water supply unit 05, and a water flow regulating valve 06 is installed on the main pipe 42.

[0064] In one embodiment, such as Figure 1 As shown, the spraying device also includes a temperature detection element 07 installed on the wall of the synthesis gas outlet 02 pipe, and the temperature detection element 07 is communicatively connected to the water flow regulating valve 06.

[0065] In this embodiment, a temperature sensor 07 is installed on the wall of the syngas outlet 02. The temperature sensor 07 is communicatively connected to a water flow regulating valve 06, thereby enabling the adjustment of the water flow rate of the water flow regulating valve 06 according to the temperature inside the gasifier. Generally, the higher the temperature, the larger the opening of the water flow regulating valve 06, and the greater the water flow rate.

[0066] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0067] The above description is merely the principle and preferred embodiment of this application. It should be noted that for those skilled in the art, implementation methods obtained by appropriately combining the technical solutions disclosed in different embodiments are also included within the technical scope of this invention. Based on the principle of this application, several other modifications can also be made, which should also be considered within the protection scope of this application.

Claims

1. A gasification furnace syngas spraying device, characterized by, The gasification furnace is provided with a plurality of spray holes (01) arranged on the furnace wall, and the spray holes (01) are not lower than the horizontal position of the syngas outlet (02); Each spray hole (01) is provided with a spray assembly (03) for spraying water mist, one end of the spray assembly (03) is located in the spray hole (01), the other end extends out of the outer wall of the gasification furnace and is connected with the water supply unit (05) through a water collecting pipe (04), and a water quantity regulating valve (06) is arranged on the water collecting pipe (04).

2. The gasifier syngas spray apparatus of claim 1, wherein, The axial direction of the spray hole (01) is gradually inclined upward from the inside to the outside of the gasification furnace.

3. The gasification furnace syngas spray apparatus of claim 2, wherein, The included angle between the axial direction of the spray hole (01) and the axial direction of the syngas outlet (02) is 15°-75°.

4. The gasification furnace syngas spray apparatus of claim 1, wherein, In the radial direction of the gasification furnace, the inner end of the spray assembly (03) is 0mm-10mm away from the inner wall of the gasification furnace.

5. The gasification furnace syngas spray device according to any one of claims 1-4, characterized in that, The spray assembly (03) comprises a spray connecting pipe (31) which is installed in the spray hole (01) in an interference fit and an atomizing nozzle (32) which is installed in the spray connecting pipe (31) and faces the inside of the gasification furnace, the other end of the spray connecting pipe (31) extends out of the outer wall of the gasification furnace, and the water collecting pipe (04) is connected with the spray connecting pipe (31) and communicates with the atomizing nozzle (32).

6. The gasification furnace syngas spray apparatus of claim 5, wherein, The atomizing nozzle (32) comprises a horizontal fan-shaped atomizing nozzle (32), a conical atomizing nozzle (32) and / or a straight-line atomizing nozzle (32).

7. The gasification furnace syngas spray apparatus of claim 5, wherein, The end of the spray connecting pipe (31) extending out of the outer wall of the gasification furnace is provided with a first connecting flange (311), the water collecting pipe (04) is provided with a second connecting flange (411), the first connecting flange (311) and the second connecting flange (411) are connected through a spherical sealing element (43), and the atomizing nozzle (32) communicates with the water collecting pipe (04) through the spherical sealing element (43).

8. The gasification furnace syngas spray apparatus of any one of claims 1-4, wherein, The spray hole (01) is provided with at least two rows, and each row is provided with at least three spray holes (01). Each row of spray holes (01) is arranged parallel to the edge of the syngas outlet (02).

9. The gasification furnace syngas spray apparatus of claim 7, wherein, The spray assemblies (03) in at least two non-adjacent spray holes (01) are connected with one water collecting pipe (04), and one water quantity regulating valve (06) is arranged on each water collecting pipe (04).

10. The gasification furnace syngas spray apparatus of claim 9, wherein, The temperature detection element (07) arranged on the pipe wall of the syngas outlet (02) is also provided, and the temperature detection element (07) is connected in communication with the water quantity regulating valve (06).

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