Rainwater-removing and water-saving structure of direct-discharging chimney

Abstract

The utility model provides a rain-removing and water-saving structure of a direct-discharging chimney. Rainwater of the direct-discharging chimney does not exist in the peripheral range of the direct-discharging chimney. The device comprises a direct-discharge chimney and a rain-removing and water-saving device, wherein the rain-removing and water-saving device comprises a supporting beam, a fixed cylinder, a fluid director, a small ball, a glass fiber reinforced plastic grating, an annular collecting tank and a liquid collecting pipeline; the supporting beam is fixed in the direct discharge chimney; the glass fiber reinforced plastic grating is fixed in the direct discharge chimney and is positioned above the supporting beam; the top of the fixed cylinder is fixed with the glass fiber reinforced plastic grating, and the bottom of the fixed cylinder is fixed with the supporting beam; the fluid director is fixed to the supporting beam and located at the bottom of the fixed cylinder. The small ball is arranged in the fixed cylinder and is positioned above the fluid director; the annular collecting tank is fixed in the direct discharge chimney and is positioned below the supporting beam; and the liquid collecting pipeline is connected with the annular collecting tank.

Description

Technical Field

[0001] The utility model relates to a rain removal and water-saving structure for a direct-discharge chimney, which can be applied to the treatment fields adopting wet flue gas purification technology such as coal-fired power plants, garbage power plants, steel plants, cement plants, and chemical plants. Background Art

[0002] The wet flue gas purification process has different absorbents, including calcium method, ammonia method, sodium alkali method, etc. The moisture content of the wet saturated flue gas after purification is above 15%. At present, the high-standard areas have implemented a particulate matter emission concentration of 5mg / Nm 3 , droplet emission concentration 15mg / Nm 3 , and there is no direct chimney rain within 200m around the direct exhaust chimney.

[0003] Due to operational requirements of the wet flue gas purification process, 80%-90% of the fresh water added to the system will be discharged out of the system with the flue gas. Direct-discharge chimney rain will appear around the direct-discharge chimney, causing a large amount of water resource waste and poor environmental visual and sensory impacts. Utility Model Content

[0004] The utility model aims to overcome the above-mentioned deficiencies in the prior art and to provide a rain-removing and water-saving structure for a direct-discharge chimney, whereby no direct-discharge chimney rain is present in the surrounding area of ​​the direct-discharge chimney.

[0005] The technical solution adopted by the utility model to solve the above-mentioned problems is: a rain removal and water-saving structure for a direct-discharge chimney, including a direct-discharge chimney, characterized in that: it also includes a rain removal and water-saving device, the rain removal and water-saving device includes a support beam, a fixed cylinder, a deflector, a small ball, a glass fiber reinforced plastic grille, an annular collection trough and a liquid collection pipeline; the support beam is fixed in the direct-discharge chimney; the glass fiber reinforced plastic grille is fixed in the direct-discharge chimney, and the glass fiber reinforced plastic grille is located above the support beam; the fixed cylinder is located between the support beam and the glass fiber reinforced plastic grille, the top of the fixed cylinder is fixed to the glass fiber reinforced plastic grille, and the bottom is fixed to the support beam; the deflector is fixed on the support beam and is located at the bottom of the fixed cylinder; the small ball is arranged in the fixed cylinder and is located above the deflector; the annular collection trough is fixed in the direct-discharge chimney and is located below the support beam; the liquid collection pipeline is connected to the annular collection trough.

[0006] The support beam of the utility model adopts a cross beam.

[0007] The fixing cylinder described in the utility model is an annular structure.

[0008] The deflector of the utility model is formed by bending two stainless steel plates.

[0009] The utility model also comprises an inspection manhole and an inspection platform, wherein the inspection manhole and the inspection platform are arranged on the straight exhaust chimney and above the glass fiber reinforced plastic grille.

[0010] The rain removal and water-saving device described in the utility model also includes a rotating locator, a filling pipeline and an evacuation pipeline; the rotating locator is located in the middle of the fixed cylinder, its top is fixed to the fiberglass grille, and its bottom is fixed to the support beam; the filling pipeline and the evacuation pipeline are both connected to the fixed cylinder after passing through the straight exhaust chimney.

[0011] The filling pipeline and the evacuation pipeline described in the utility model are respectively located on both sides of the straight exhaust chimney, and the filling pipeline is located above the evacuation pipeline.

[0012] The rotary positioner of the utility model is a cylindrical closed structure, and sealing plates are arranged at the upper and lower ends.

[0013] The utility model also comprises a detection device, which comprises a shutoff valve, a water flow indicator and a flow meter; the shutoff valve, the water flow indicator and the flow meter are arranged on the liquid receiving pipeline in sequence.

[0014] The detection device described in the utility model also includes a first pressure detection device and a second pressure detection device. The first pressure detection device is arranged on the straight exhaust chimney, between the annular collecting trough and the support beam; the second pressure detection device is arranged on the straight exhaust chimney, above the fiberglass grille.

[0015] Compared with the prior art, the utility model has the following advantages and effects:

[0016] (1) This device can further remove mist, dust and rain at the same time to achieve the purpose of water saving, so that the particle emission concentration and droplet emission concentration are controlled at 5mg / Nm 3 、15mg / Nm 3 Within, or even lower, there is no direct chimney rain within 200m around the direct chimney.

[0017] (2) The device can flexibly adjust and control online according to load changes and detection parameter feedback.

[0018] (3) The device can be arranged at the entrance of the direct exhaust chimney. It is easy to manufacture and has a short installation period. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall layout structure of an embodiment of the utility model.

[0020] Figure 2 It is a structural schematic diagram of the rain-removing and water-saving device part of the embodiment of the utility model.

[0021] Figure 3 It is a schematic diagram of the top view of the support beam part of the embodiment of the utility model.

[0022] Figure 4 It is a schematic diagram of the top view of the rotary positioner and the fixed cylinder part of the embodiment of the utility model.

[0023] Figure 5 It is a schematic structural diagram of the deflector and the small ball according to an embodiment of the utility model.

[0024] Figure 6 It is a schematic diagram of the top view of the fiberglass grille according to an embodiment of the utility model. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0026] The embodiment of the utility model comprises a direct exhaust chimney 3, a rain removal and water saving device and a detection device.

[0027] The lower end of the straight exhaust chimney 3 is a diameter reducing section 2, which is connected to the absorption and demisting part of the wet flue gas purification process. The angle A of the diameter reducing section 2 is controlled in the range of 70-75 degrees.

[0028] The rain removal and water saving device comprises a support beam 6, a rotary positioner 7, a fixed cylinder 19, a deflector 8, a small ball 9, a glass fiber reinforced plastic grating 20, a filling pipeline 10, an evacuation pipeline 11, an annular collection tank 12 and a liquid collection pipeline 13.

[0029] The support beam 6 is fixed in the straight exhaust chimney 3. The support beam 6 adopts a cross beam and the material is 2205.

[0030] The FRP grating 20 is fixed in the straight exhaust chimney 3. The FRP grating 20 is located above the support beam 6. The FRP grating 20 has a thickness of 10 mm and a height of 50 mm. The longitudinal spacing D is 50 mm and the transverse spacing E is 500 mm. Adjacent FRP gratings 20 are fixed by bolts to form an integral structure. The material of the bolts is 2205.

[0031] The fixed tube 19 is an annular structure, which is arranged around the inner wall of the straight exhaust chimney 3 and is 150 mm away from the inner wall of the straight exhaust chimney 3. The fixed tube 19 is located between the support beam 6 and the glass fiber reinforced plastic grille 20, and the top of the fixed tube 19 is fixed to the glass fiber reinforced plastic grille 20, and the bottom is fixed to the support beam 6.

[0032] The deflector 8 is welded and fixed on the support beam 6 and is located at the bottom of the fixed cylinder 19. The deflector 8 is formed by bending two 2205 stainless steel plates, and the bending angle B is selected to be 135 degrees. There are multiple deflectors 8, which are laid flat on the support beam 6, and the spacing C of the deflectors 8 is selected to be 50mm. The deflector 8 plays the role of flue gas diversion and supporting the small ball 9, and is wear-resistant and corrosion-resistant. The fixed cylinder 19, the deflector 8 and the rotating positioner 7 are made of 2205.

[0033] The small balls 9 are arranged in the fixed cylinder 19, and are located above the deflector 8. There are a number of balls 9, the diameter of the small balls 9 is selected to be 70 mm, and the maximum filling height of the small balls 9 is 300 mm.

[0034] The cross section of the annular collecting trough 12 is a right-angle structure, located in the variable diameter section 2 of the straight exhaust chimney 3, and its inner end is welded and fixed to the wall plate of the variable diameter section 2, and the outer end diameter is consistent with the diameter of the straight exhaust chimney 3. The annular collecting trough 12 is located within the range of 1000-1500mm below the support beam 7, and the material selected is 2205.

[0035] The liquid collecting pipeline 13 is located below the annular collecting tank 12 , and the liquid collecting pipeline 13 is connected to the annular collecting tank 12 via a flange.

[0036] The inspection manhole 4 and the inspection platform 5 are arranged on the straight exhaust chimney 3 and arranged above the glass fiber reinforced plastic grille 20. The maintenance personnel can enter the inspection manhole 4 through the inspection platform 5 and inspect the internal equipment on the glass fiber reinforced plastic grille 20. The size of the inspection manhole 4 is DN800, and the width of the inspection platform 5 is 1500mm.

[0037] The rotary positioner 7 is a cylindrical closed structure, with sealing plates at the upper and lower ends. The diameter of the rotary positioner 7 is 20% of the diameter of the straight-discharge chimney 3. The rotary positioner 7 is located in the middle of the fixed cylinder 19, with its top fixed to the glass fiber reinforced plastic grille 20 and its bottom fixed to the support beam 6. The loading pipeline 10 and the evacuation pipeline 11 are connected to the fixed cylinder 19 after passing through the straight-discharge chimney 3. The loading pipeline 10 and the evacuation pipeline 11 are respectively located on both sides of the straight-discharge chimney 3, and the loading pipeline 10 is located above the evacuation pipeline 11. The pipe diameters of the loading pipeline 10 and the evacuation pipeline 11 are both DN200, and the material is 2205. During loading, the ball 9 enters the fixed cylinder 19 from the top loading pipeline 10 through compressed air. Under the action of the deflector 8, the ball 9 can rotate around the rotary positioner 7, which is convenient for loading from the top. During evacuation, the balls 9 use gravity and rotary shearing force to automatically move from the fixed cylinder 19 into the bottom evacuation pipeline 11 for evacuation.

[0038] The detection device includes a shut-off valve 14 , a water flow indicator 15 , a flow meter 16 , a first pressure detection device 17 and a second pressure detection device 18 .

[0039] The shut-off valve 14, the water flow indicator 15, and the flow meter 16 are arranged in sequence on the liquid collection pipeline 13, outside the diameter-changing section 2. The liquid collection pipeline 13, the shut-off valve 14, the water flow indicator 15, and the flow meter 16 are provided with heating and insulation to prevent the collected liquid from freezing during winter operation. An active observation port is reserved at the water flow indicator 15 to facilitate observation of the internal collected liquid flow. The material of the liquid collection pipeline 13 is 2205, and the shut-off valve 14, the water flow indicator 15, and the flow meter 16 are made of anti-corrosion materials.

[0040] The first pressure detection device 17 is arranged on the direct exhaust chimney 3, between the annular collecting trough 12 and the support beam 6; the second pressure detection device 18 is arranged on the direct exhaust chimney 3, above the glass fiber reinforced plastic grille 20. The overall resistance of the rain removal and water saving device can be read out by the difference between the first pressure detection device 17 and the second pressure detection device 18, and the operating resistance is about 350Pa.

[0041] The operation method of the utility model is as follows: the wet saturated flue gas after absorption and demisting purification is ready to enter the straight-discharge chimney 3 for discharge through the variable diameter section 2. The wet saturated flue gas first passes through the annular collection trough 12 of the same diameter as the chimney, and after the flow is stabilized, it enters the device tangentially under the action of the guide 8, and while pushing the small ball 9 to rotate, it collides with the small ball 9. The droplets in the wet saturated flue gas condense during the friction and collision process and gather on the liquid film surface of the small ball 9. When the thickness of the liquid film reaches a certain weight, the middle part falls into the absorption and demisting part 1 by itself, and the peripheral part flows down along the wall of the variable diameter section 2 to the annular collection trough 12, and is recovered into the system through the liquid collection pipeline 13. In addition, the filling amount of the small ball 9 can be adjusted online according to the rain removal and water saving effect and resistance requirements.

[0042] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A rain removal and water saving structure for a direct discharge chimney, comprising a direct discharge chimney, characterized in that: It also includes a rain removal and water-saving device, which includes a support beam, a fixed cylinder, a deflector, a small ball, a fiberglass grille, an annular collection trough and a liquid collection pipeline; the support beam is fixed in the straight-exhaust chimney; the fiberglass grille is fixed in the straight-exhaust chimney, and the fiberglass grille is located above the support beam; the fixed cylinder is located between the support beam and the fiberglass grille, the top of the fixed cylinder is fixed to the fiberglass grille, and the bottom is fixed to the support beam; the deflector is fixed on the support beam and is located at the bottom of the fixed cylinder; the small ball is arranged in the fixed cylinder and is located above the deflector; the annular collection trough is fixed in the straight-exhaust chimney and is located below the support beam; the liquid collection pipeline is connected to the annular collection trough.

2. The rain removal and water saving structure of the direct discharge chimney according to claim 1 is characterized by: The support beam adopts a cross beam.

3. The rain removal and water saving structure of the direct discharge chimney according to claim 1 is characterized by: The fixing cylinder is an annular structure.

4. The rain removal and water saving structure of the direct discharge chimney according to claim 1 is characterized by: The deflector is formed by bending two stainless steel plates.

5. The rain removal and water saving structure of the direct discharge chimney according to claim 1 is characterized by: It also includes a maintenance manhole and a maintenance platform, which are arranged on the straight exhaust chimney and above the fiberglass grille.

6. The rain removal and water saving structure of the direct discharge chimney according to claim 1 is characterized by: The rain removal and water saving device also includes a rotary positioner, a filling pipeline and an evacuation pipeline; the rotary positioner is located in the middle of the fixed cylinder, its top is fixed to the glass fiber reinforced plastic grid, and its bottom is fixed to the support beam; the filling pipeline and the evacuation pipeline are both connected to the fixed cylinder after passing through the straight exhaust chimney.

7. The rain removal and water saving structure of the direct discharge chimney according to claim 6 is characterized by: The filling pipeline and the evacuation pipeline are respectively located on both sides of the straight exhaust chimney, and the filling pipeline is located above the evacuation pipeline.

8. The rain removal and water saving structure of the direct discharge chimney according to claim 6 is characterized by: The rotary positioner is a cylindrical closed structure, with sealing plates provided at the upper and lower ends.

9. The rain removal and water saving structure of the direct discharge chimney according to claim 1 is characterized by: It also includes a detection device, which includes a shut-off valve, a water flow indicator and a flow meter; the shut-off valve, the water flow indicator and the flow meter are arranged in sequence on the liquid collection pipeline.

10. The rain removal and water saving structure of the direct discharge chimney according to claim 9 is characterized in that: The detection device also includes a first pressure detection device and a second pressure detection device. The first pressure detection device is arranged on the straight exhaust chimney, between the annular collecting trough and the support beam; the second pressure detection device is arranged on the straight exhaust chimney, above the fiberglass grille.

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