Dust removal device for high-efficiency recovery and blockage prevention of high-temperature tail gas

Abstract

The utility model discloses a dust removal device for high-efficiency recovery and blockage prevention of high-temperature gas tail gas. The dust removal device comprises a gravity dust remover for directly receiving the gas tail gas through a pipeline, the cyclone dust collector is used for receiving gas tail gas through a pipeline; ash coolers are arranged below the gravity dust collector and the cyclone dust collector and are used for reducing the temperature of the tail gas of the coal gas; a star-shaped ash discharging device is mounted below the ash cooler through an ash cooling hopper, and cooled particles are discharged through an ash discharging pipe of the star-shaped ash discharging device. The dust removal device effectively solves the technical problems that existing gas tail gas cannot be efficiently collected, and existing process requirements cannot be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal gas tail gas dust removal utilization technical field especially relates to a dust removal device for high temperature coal gas tail gas high efficiency recovery and prevent blocking. BACKGROUND

[0002] The coal gas tail gas dust removal device is the key equipment for treating dust-containing flue gas in the production of steel enterprises, and the ash cooler is the core equipment in the high-temperature flue gas system, mainly used for reducing the flue gas temperature and separating dust, and its performance directly affects the dust removal efficiency, equipment life and operation cost. The ash cooler needs to reduce the high-temperature flue gas of about 1000℃ to 100℃-200℃ to avoid damage to downstream equipment due to high temperature, and the dust particles are agglomerated and increased by cooling to improve the gravity sedimentation efficiency. The dust in the low-temperature flue gas is more easily captured by the subsequent dust collector, reducing the PM2.5 emission concentration. Dust blocking often occurs during the dust removal process.

[0003] Therefore, based on the above technical problems, the skilled in the art needs to develop a dust removal device for high-temperature coal gas tail gas high-efficiency recovery and anti-blocking. INVENTION CONTENTS

[0004] The utility model discloses a dust removal device for high-temperature coal gas tail gas high-efficiency recovery and anti-blocking, which effectively solves the technical problems that the existing coal gas tail gas cannot be collected efficiently and cannot meet the existing process requirements.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] The utility model discloses a dust removal device for high-temperature coal gas tail gas high-efficiency recovery and anti-blocking, which effectively solves the technical problems that the existing coal gas tail gas cannot be collected efficiently and cannot meet the existing process requirements.

[0007] A gravity dust collector directly receiving coal gas tail gas through a pipeline; and

[0008] At least one cyclone dust collector receiving coal gas tail gas through a pipeline;

[0009] The lower part of the gravity dust collector and the lower part of the cyclone dust collector are both provided with an ash cooler, which is used to reduce the temperature of the coal gas tail gas;

[0010] The lower part of the ash cooler is provided with a star-type ash discharger through an ash cooler, and the particulate matter after cooling is discharged through the ash discharging pipe of the star-type ash discharger.

[0011] Further, the lower part of the gravity dust collector has a settling chamber;

[0012] The lower end of the settling chamber is connected to the inlet end of the ash cooler through a cylinder, and a sieve plate is installed in the cylinder between the settling chamber and the ash cooler;

[0013] The high material level measuring point is arranged at the connection between the gravity dust collector and the settling chamber, and the material level measuring point is arranged at the connection between the lower ash bucket and the star-shaped ash discharger;

[0014] The part of the cylinder above the sieve plate is provided with an inspection hole, and a poking hole is arranged above the inspection hole;

[0015] The metal expansion joint is arranged between the cylinder and the settling chamber.

[0016] Further, the ash cooler has a circulating water circuit, and the circulating water circuit has a cooling water inlet and a cooling water outlet extending to the outside of the shell of the ash cooler;

[0017] The cooling water inlet is located below the cooling water outlet, and a thermocouple is installed on the water inlet and outlet pipe connected with the cooling water inlet and the cooling water outlet to measure the water temperature of the cooling water inlet and the cooling water outlet respectively through the thermocouple;

[0018] The shell of the ash cooler is provided with a material level measuring point;

[0019] The ash bucket is provided with a thermocouple for detecting the temperature of the ash.

[0020] Further, the side of the settling chamber is communicated with a bypass;

[0021] The bypass is extended to one end inside the settling chamber and provided with a high-temperature gate valve, and the high-temperature gate valve is used to control the communication state of the bypass;

[0022] The bypass and the ash discharging pipe of the star-shaped ash discharger are both provided with a plug valve.

[0023] Further, the cyclone dust collector comprises:

[0024] A cyclone dust collector cylinder and a cyclone dust collector cone;

[0025] The top cover is installed on the upper end of the cyclone dust collector cylinder, and the air cannon is installed on the lower part of the cyclone dust collector cone;

[0026] The low material level measuring point is arranged on the upper part of the cyclone dust collector cone;

[0027] The cyclone outlet at the lower end of the cyclone dust collector cone is communicated with the inlet of the lower ash cooler through a pipeline.

[0028] Further, the pipeline between the cyclone dust collector cone and the ash cooler is provided with a gate valve and a corrugated compensator;

[0029] The sieve plate is installed on the inlet end of the ash cooler.

[0030] Further, the cyclone dust collector cone is communicated with a bypass;

[0031] The bypass and the ash discharge pipe of the star-shaped ash discharger are provided with plug valves.

[0032] Further, the outer shell of the ash cooler is a three-layer structure, the outermost layer of the outer shell is made of Q355B steel plate, and the thickness of the outermost layer is 10-15 mm.

[0033] The inner wall of the outer shell is a ceramic fiber blanket, and the thickness of the ceramic fiber blanket is 60-80 mm.

[0034] The middle layer of the outer shell is wear-resistant castable, and the thickness of the wear-resistant castable is 70-90 mm.

[0035] Further, the specification of the water-cooled heat exchange pipe of the ash cooler is φ32*4 mm.

[0036] The inlet water temperature of the cooling water of the ash cooler is 0-30 DEG C, and the inlet pressure of the cooling water is 1-1.33 MPa.

[0037] Further, the diameter of the outlet of the settling chamber is 800-1000 mm.

[0038] In the above technical scheme, the dust removal device provided by the utility model has the following beneficial effects:

[0039] In order to realize high-efficiency recovery and anti-blocking dust removal of high-temperature coal gas tail gas, the gravity dust collector, the ash cooler and the cyclone dust collector are arranged, the outlet of the settling chamber is designed to be relatively large, so as to ensure smooth flow of gravity dust removal ash, the bypass ash discharge of the settling chamber is arranged, and the ash is discharged directly to the ground, the ash cooler is optimized and designed, the inner wall of the ash cooler is a ceramic fiber blanket, and the ceramic fiber blanket plays a heat preservation and insulation role, and the middle of the outer shell of the ash cooler is wear-resistant castable, so that an anti-wear layer is formed, the anti-impact property is high, the compressive strength is high, and the durability is good.

[0040] The ash cooler of the dust removal device is provided with a poking hole, when material is accumulated, the poking hole can be used for checking and manually poking ash, so that the inlet flow is smooth, and secondly, a thermocouple is arranged at the outlet ash bucket of the ash cooler, so as to detect the outlet material temperature.

[0041] The dust removal device uses the cyclone dust collector cone, and the air cannon is arranged at the lower part of the cyclone dust collector cone, so as to prevent and eliminate material blockage, so that the temperature of high-temperature coal gas tail gas is finally reduced, and the dust removal ash does not block the outlet. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to make the technical scheme of the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments will be briefly introduced below, obviously, the accompanying drawings in the following description are only some embodiments described in the present application, and other accompanying drawings can also be obtained by those skilled in the art according to these accompanying drawings.

[0043] Figure 1 A structure diagram of a dust removal device for high-efficiency recovery and anti-blocking of high-temperature coal gas tail gas is disclosed in the embodiments of the present application.

[0044] Mark explanation:

[0045] 1, gravity dust collector; 2, high material level measuring point; 3, settling chamber; 4, high-temperature gate valve; 5, metal expansion joint; 6, poking hole; 7, inspection hole; 8, sieve plate; 9, cold ash collector; 10, material level measuring point; 11, circulating water path; 12, cooling water outlet; 13, cooling water inlet; 14, wear-resistant castable; 15, shell; 16, thermocouple; 17, cold ash hopper; 18, star-shaped ash discharger; 19, plug valve; 20, bypass; 21, flue gas passage; 22, cyclone dust collector; 23, top cover; 24, cyclone dust collector cylinder; 25, cyclone dust collector cone; 26, low material level measuring point; 27, air cannon; 28, cyclone outlet; 29, corrugated compensator. DETAILED DESCRIPTION

[0046] In order to make those skilled in the art better understand the technical scheme of the present application, the present application will be further described in detail below with reference to the accompanying drawings.

[0047] Referring to Figure 1 as shown;

[0048] The present embodiment discloses a dust removal device for high-efficiency recovery and anti-blocking of high-temperature coal gas tail gas, which comprises:

[0049] a gravity dust collector 1 directly receiving coal gas tail gas through a pipeline; and

[0050] at least one cyclone dust collector 22 receiving coal gas tail gas through a pipeline;

[0051] The gravity dust collector 1 and the cyclone dust collector 22 are both provided with a cold ash collector 9 below, and the cold ash collector 9 is used to reduce the temperature of the coal gas tail gas;

[0052] A star-shaped ash discharger 18 is installed below the cold ash collector 8 through a cold ash hopper 17, and the particulate matter after cooling is discharged through the ash discharging pipe of the star-shaped ash discharger 18.

[0053] Specifically, the embodiment discloses a dust removal device for high-efficiency recovery and anti-blocking of high-temperature coal gas tail gas, which is provided with a gravity dust remover 1 and at least one cyclone dust remover 22, and the embodiment is further explained and described by taking two parallelly arranged cyclone dust removers 22 as a specific embodiment, wherein the gravity dust remover 1 and the cyclone dust remover 22 are communicated through a flue gas passage, the gravity dust remover 1 of the embodiment is used to treat coal gas with large particles and large specific gravity, and then the coal gas with small particles and small specific gravity is treated by the cyclone dust remover 22 through the flue gas passage. The coal gas tail gas treated by the embodiment has a temperature of 600-1000 DEG C, and the flue gas has a dust content of 50-100 g / Nm 3 -100g / Nm 3 The ash cooler 9 of the embodiment is used to cool and discharge the dust.

[0054] Preferably, the gravity dust remover 1 of the embodiment is provided with a settling chamber 3 below;

[0055] The lower end of the settling chamber 3 is connected to the inlet end of the ash cooler 9 through a cylinder, and a sieve plate 8 is arranged in the cylinder between the settling chamber 3 and the ash cooler 9;

[0056] A high material level measuring point 2 is arranged at the connecting position of the gravity dust remover 1 and the settling chamber 3, and a material level measuring point 10 is arranged at the connecting position of the lower ash cooler 17 and the star-shaped ash discharger 18;

[0057] The part of the cylinder above the sieve plate 8 is provided with an inspection hole 7, and the inspection hole 7 is provided with a poking hole 6 above, the sieve plate 8 is arranged above the inlet of the ash cooler 9, the inspection hole 7 is arranged above the sieve plate 8, the material accumulation can be observed at any time, and when the material is accumulated, the inspection hole 7 can be used to check and manually treat through the poking hole 6, so that the inlet material is smooth, and the thermocouple 16 arranged in the ash cooler 9 can monitor the outlet material temperature;

[0058] A metal expansion joint 5 is arranged between the cylinder and the settling chamber 3.

[0059] The ash cooler 9 of the embodiment has a circulating water path 11, and the circulating water path 11 has a cooling water inlet 13 and a cooling water outlet 12 extending to the outside of the shell 15 of the ash cooler 9;

[0060] The cooling water inlet 13 is located below the cooling water outlet 12, and a thermocouple is arranged on the inlet and outlet water pipe connected with the cooling water inlet 13 and the cooling water outlet 12, so as to measure the water temperature of the cooling water inlet 13 and the cooling water outlet 12 respectively through the thermocouple;

[0061] The shell 15 of the ash cooler 9 is provided with a material level measuring point 10;

[0062] The ash cooler 9 is provided with a thermocouple 16 for detecting the ash temperature.

[0063] Firstly, the solid particles with large gas tail are settled in the settling chamber 3 of the gravity dust collector under the action of gravity, and the high material level measuring point 2, the high temperature gate valve 4 and the metal expansion joint 5 are sequentially arranged in the settling chamber 3. In order to ensure the smooth flow of the gravity dust, the outlet of the settling chamber 3 in the embodiment is designed to be slightly larger in size, and the outlet diameter is 800mm-1000mm.

[0064] Preferably, based on the structure of the gravity dust collector 1 and the settling chamber 3, the settling chamber 3 in the embodiment is communicated with a bypass 20 on the side; wherein the bypass 20 extends to one end inside the settling chamber 3 and is provided with a high temperature gate valve 4, and the high temperature gate valve 4 is used to control the communication state of the bypass 20.

[0065] The bypass 20 and the ash discharge pipe of the star-shaped ash discharger 18 are both provided with plug valves 19.

[0066] The high temperature gate valve 4 in the embodiment is used to control the bypass ash discharge of the settling chamber 3. When the ash in the settling chamber 3 is seriously accumulated, the high temperature gate valve 4 can be opened to directly discharge the ash to the ground through the bypass 20.

[0067] Preferably, the cyclone dust collector 22 in the embodiment includes a cyclone dust collector cylinder 24 and a cyclone dust collector cone 25.

[0068] The top cover 23 is installed on the upper end of the cyclone dust collector cylinder 24, and the air cannon 27 is installed on the lower part of the cyclone dust collector cone 25.

[0069] The low material level measuring point 26 is arranged on the upper part of the cyclone dust collector cone 25.

[0070] The cyclone outlet 28 at the lower end of the cyclone dust collector cone 25 is communicated with the inlet of the ash cooler 9 below through a pipeline.

[0071] The plug valve 19 and the corrugated compensator 29 are installed on the pipeline between the cyclone dust collector cone 25 and the ash cooler 9; and the sieve plate 8 is installed on the inlet end of the ash cooler 9.

[0072] The cyclone dust collector cone 25 in the embodiment is communicated with the bypass 20, same as the gravity dust collector 1; and the bypass 20 and the ash discharge pipe of the star-shaped ash discharger 18 are both provided with plug valves 19.

[0073] Preferably, the shell 15 of the ash cooler 9 in the embodiment has a three-layer structure, the outermost layer of the shell 15 is made of Q355B steel plate, and the thickness of the outermost layer is 10mm-15mm; the inner wall of the shell 15 is made of ceramic fiber blanket, and the thickness of the ceramic fiber blanket is 60mm-80mm; and the middle layer of the shell 15 is made of wear-resistant cast material 14, and the thickness of the wear-resistant cast material 14 is 70mm-90mm.

[0074] Preferably, the size of the water-cooled heat exchange pipe of the ash cooler 9 is φ32*4mm, and the material is 20G.

[0075] The water temperature of the cooling water inlet 13 of the ash cooler 9 is 0-30℃, and the pressure of the cooling water inlet 13 is 1MPa-1.33MPa.

[0076] The sieve plate 8 involved in the embodiment can be used to break the powder, and the aperture can be designed according to actual process requirements.

[0077] In the above technical scheme, the dust removal device for high-efficiency recovery and anti-blocking of high-temperature coal gas tail gas has the following beneficial effects:

[0078] In order to realize high-efficiency recovery and anti-blocking dust removal of high-temperature coal gas tail gas, the gravity dust collector 1, the ash cooler 9 and the cyclone dust collector 22 are arranged, the outlet of the settling chamber 3 is designed to be relatively large, so as to ensure smooth flow of the gravity dust removal ash, the bypass 20 of the settling chamber 3 is arranged to unload ash, and the ash is directly discharged to the ground; the ash cooler 9 is optimally designed, the inner wall of the ash cooler 9 is a ceramic fiber blanket, and plays a heat preservation and insulation role; the middle of the shell 15 of the ash cooler 9 is the wear-resistant castable 14, forms a wear-resistant layer, has strong impact resistance, high compressive strength and good durability.

[0079] The ash cooler 9 of the dust removal device is provided with the ash poking hole 6 above, when material is accumulated, the ash poking hole 6 can be checked through the inspection hole 7, artificial ash poking is performed, and the inlet flow is ensured to be smooth; secondly, the thermocouple 16 is arranged at the outlet ash bucket of the ash cooler 9, and is used to detect the outlet material temperature.

[0080] The air cannon 27 is arranged at the lower part of the cyclone dust collector body 25 of the dust removal device, is used for preventing and eliminating material blockage, finally ensures that the temperature of the high-temperature coal gas tail gas is reduced, and the dust removal ash does not block the outlet.

[0081] The above only describes some exemplary embodiments of the utility model by way of description, without doubt, for ordinary skilled persons in the art, the described embodiments can be modified in various ways without departing from the spirit and scope of the utility model. Therefore, the above drawings and description are illustrative in nature, and should not be understood as limiting the protection scope of the utility model claims.

Claims

1. A dust removal device for high-efficiency recovery and anti-clogging of high-temperature coal gas tail gas, characterized in that, The dust removal device includes: A gravity dust collector (1) that directly receives coal gas tail gas through a pipeline; and At least one cyclone dust collector (22) that receives coal gas tail gas through a pipeline; A cooler (9) is installed below both the gravity dust collector (1) and the cyclone dust collector (22), and the cooler (9) is used to reduce the temperature of the coal gas tail gas. Below the ash cooler (9), a star-shaped ash discharger (18) is installed via a ash hopper (17), and the cooled particles are discharged through the ash discharge pipe of the star-shaped ash discharger (18).

2. The dust removal device for high-efficiency recovery and anti-clogging of high-temperature coal gas tail gas according to claim 1, characterized in that, The gravity dust collector (1) has a settling chamber (3) at its bottom; The lower end of the settling chamber (3) is connected to the inlet end of the ash cooler (9) through a cylinder, and a sieve plate (8) is installed in the cylinder between the settling chamber (3) and the ash cooler (9). A high material level measuring point (2) is set at the connection between the gravity dust collector (1) and the settling chamber (3), and a material level measuring point (10) is set at the connection between the cold ash hopper (17) below and the star-shaped ash discharger (18). The portion of the cylinder above the sieve plate (8) is provided with an inspection hole (7), and an ash-removing hole (6) is provided above the inspection hole (7); A metal expansion joint (5) is provided between the cylinder and the settling chamber (3).

3. A dust removal device for high-efficiency recovery and anti-clogging of high-temperature coal gas tail gas according to claim 1 or 2, characterized in that, The cooler (9) has a circulating water passage (11), and the circulating water passage (11) has a cooling water inlet (13) and a cooling water outlet (12) extending to the outside of the outer shell (15) of the cooler (9); The cooling water inlet (13) is located below the cooling water outlet (12), and thermocouples are installed on the inlet and outlet water pipes connected to the cooling water inlet (13) and the cooling water outlet (12) to measure the water temperature of the cooling water inlet (13) and the cooling water outlet (12) respectively. The outer shell (15) of the ash cooler (9) is provided with a material level measuring point (10); The cold ash hopper (17) is equipped with a thermocouple (16) for detecting the temperature of the ash.

4. The dust removal device for high-efficiency recovery and anti-clogging of high-temperature coal gas tail gas according to claim 2, characterized in that, The side of the settling chamber (3) is connected to a bypass (20); The bypass (20) extends into the interior of the settling chamber (3) and is equipped with a high-temperature gate valve (4), which is used to control the connection state of the bypass (20). Both the bypass (20) and the rotary ash discharger (18) are equipped with gate valves (19).

5. The dust removal device for high-efficiency recovery and anti-clogging of high-temperature coal gas tail gas according to claim 2, characterized in that, The cyclone dust collector (22) includes: Cyclone dust collector cylinder (24) and cyclone dust collector cone (25); The top cover (23) is installed on the upper end of the cyclone dust collector cylinder (24), and an air cannon (27) is installed on the lower part of the cyclone dust collector cone (25); The upper part of the cone (25) of the cyclone dust collector is provided with a low material level measuring point (26); The cyclone outlet (28) at the lower end of the cone (25) of the cyclone dust collector is connected to the inlet of the ash cooler (9) below through a pipeline.

6. The dust removal device for high-efficiency recovery and anti-clogging of high-temperature coal gas tail gas according to claim 5, characterized in that, A slide gate valve (19) and a corrugated compensator (29) are installed on the pipeline between the cyclone dust collector cone (25) and the ash cooler (9); A sieve plate (8) is installed at the inlet end of the ash cooler (9).

7. The dust removal device for high-efficiency recovery and anti-clogging of high-temperature coal gas tail gas according to claim 6, characterized in that, The cyclone dust collector cone (25) is connected to a bypass (20); Both the bypass (20) and the rotary ash discharger (18) are equipped with gate valves (19).

8. The dust removal device for high-efficiency recovery and anti-clogging of high-temperature coal gas tail gas according to claim 1, characterized in that, The outer shell (15) of the ash cooler (9) has a three-layer structure. The outermost layer of the outer shell (15) is made of Q355B steel plate and the thickness of the outermost layer is 10mm-15mm. The inner wall of the outer shell (15) is a ceramic fiber blanket, and the thickness of the ceramic fiber blanket is 60mm-80mm; The middle layer of the outer shell (15) is a wear-resistant castable (14), and the thickness of the wear-resistant castable (14) is 70mm-90mm.

9. A dust removal device for high-efficiency recovery and anti-clogging of high-temperature coal gas tail gas according to claim 8, characterized in that, The water-cooled heat exchange tube of the ash cooler (9) has a specification of φ32*4mm; The cooling water inlet temperature of the ash cooler (9) is 0-30℃, and the cooling water inlet pressure (13) is 1MPa-1.33MPa.

10. A dust removal device for high-efficiency recovery and anti-clogging of high-temperature coal gas tail gas according to claim 2, characterized in that, The diameter of the outlet of the settling chamber (3) is 800mm-1000mm.

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