CN220257428U - Filter for open type circulating water system of steam turbine of thermal power plant - Google Patents

Abstract

The utility model discloses a filter for an open circulating water system of a steam turbine of a thermal power plant, which comprises a primary filtering mechanism and a secondary filtering mechanism, wherein circulating water can pass through large-particle sludge precipitation or metal preliminary natural precipitation in the primary filtering mechanism, the pressure of the circulating water between filtering barrels is reduced, then the circulating water flows into a filter main body for secondary filtering, in the secondary filtering mechanism, the filtered circulating water can enter a water inlet pipe again for secondary filtering, and the circulating water containing filter screen impurities is led into the water inlet pipe through the operation of a water suction pump, so that the secondary filtering is carried out. Finally, the filtered circulating water flows into the filter main body and is precipitated in the filter main body, impurities are removed, the filter can be operated frequently by reducing manual replacement of the filter screen, the labor cost is integrally simplified, and the working efficiency is improved.

Description

Filter for open type circulating water system of steam turbine of thermal power plant

Technical Field

The utility model relates to the technical field of filters, in particular to a filter for a steam turbine open type circulating water system of a thermal power plant.

Background

The power generation of the thermal power plant is to utilize the combustion of fuel to evaporate the water source of the boiler to form water vapor to drive the operation of the internal mechanism of the motor to be converted into actual electric energy. In the actual life, a large amount of water sources are needed in the power plant, so that the importance of water recycling is reflected for further saving resources and avoiding waste. In the open-type circulating water system of the water circulating system used in the conventional thermal power plant, the water vapor discharged after the thermal power plant operates can be condensed and flows into the open-type circulating water system to be used as a water source in the thermal power plant for secondary utilization, so that the water in the backflow water can be condensed into water through a condensing tower, the conventional condensing tower of the thermal power plant is close to a chimney for discharging waste gas, various impurities from air or a water pipe system can be positively doped at the periphery, and in actual production, the impurities are circularly reciprocated and can be deposited in the water circulating system of thermal power plant equipment, the water energy utilization efficiency can be reduced, and even the equipment is blocked to influence the service life of the thermal power plant, so that a filter device in the open-type circulating water system plays an important role.

Conventional filtration equipment filters the impurity in the secondary water through the filter core in the filter, because the circulating water flow of thermal power plant is great, cause the jam of filter core filtration pore very easily, influence the normal circulation of circulating water, the pain point lies in the trouble that needs regularly frequent opening filter equipment to change the filter core, change just relatively, can cause the waste of filter core and improve the maintenance cost of enterprise moreover, work efficiency has been reduced, for this we propose a thermal power plant's open filter device for circulating water system, filter the impurity in the circulating water through designing novel filter structure, improve the water energy availability factor and increase equipment life.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a filter for a steam turbine open type circulating water system of a thermal power plant, which aims to solve the problems that a filter hole is easy to block and a filter screen is frequently replaced in the existing filtering device provided in the background art.

Technical proposal

In order to achieve the above purpose, the technical scheme of the utility model is as follows: the filter for the steam turbine open type circulating water system of the thermal power plant comprises a filter main body, a water inlet pipe and a water outlet pipe, wherein the water inlet pipe and the water outlet pipe are respectively communicated with two sides of the filter main body, and the filter further comprises a primary filtering mechanism, a secondary filtering mechanism, a cleaning mechanism and a pollution discharge mechanism;

the first-stage filtering mechanism is arranged on one side of the filter main body and is used for filtering the circulating water flowing into the water inlet pipe for the first time;

the secondary filtering mechanism is arranged in the filter main body and is used for carrying out secondary filtering on the circulating water flowing into the filter main body;

the cleaning mechanism is sealed and arranged on the filter main body in a penetrating way, part of the cleaning mechanism is positioned in the secondary filtering mechanism, and the cleaning mechanism is used for cleaning impurities in the secondary filtering mechanism;

the blowdown mechanism is arranged at the lower end of the filter main body and is used for discharging impurities in the filter main body.

Preferably, the first-stage filtering mechanism comprises a sedimentation pipe, a butterfly valve, a filtering-blocking slideway and a filtering-blocking plate;

the sedimentation pipes are provided with a plurality of sedimentation pipes, the sedimentation pipes are communicated with the lower end of the water inlet pipe, and the sedimentation pipes are provided with a first visual window;

the plurality of butterfly valves are respectively arranged on the plurality of sedimentation pipes;

the filtration-blocking slideway is fixedly communicated with the water inlet pipe;

the filter blocking plate is arranged in the filter blocking slideway, and the filter blocking plate and the filter blocking slideway are slidably arranged.

Further, the secondary filtering mechanism comprises a cover plate, a supporting plate and a filter screen;

the cover plate is arranged on the inner side of the filter main body, and a first through hole is formed in the middle of the cover plate;

the support plate is fixedly arranged on the inner side of the filter cylinder body, and a through hole II is formed in the middle of the support plate;

the filter screen is installed in the upper end of backup pad, and the filter screen is located the central point of backup pad puts.

Further, the filter body comprises a filter cylinder, an upper end cover and a lower end cover;

the filter cylinder is positioned at one side of the water inlet pipe and is fixedly communicated with the water inlet pipe;

the upper end cover is positioned on the upper side of the filter barrel body, a sealing ring is arranged between the upper end cover and the filter barrel body, and the upper end cover is detachably connected with the filter barrel body;

the lower end cover is located the downside of filtering the barrel, the lower end cover with filtering the barrel and dismantling the connection, the lower end cover with be equipped with the sealing washer in the middle of the filtering the barrel, and be equipped with the through-hole in the middle of the lower end cover.

As still further in this application, the cleaning mechanism includes a sealed bearing, a water rod, a rotating rod, a water suction pump, a flow guiding pipe, a first driving motor and a second driving motor;

the rotary pipe is sealed and penetrates through the central through hole of the upper end cover, and is in rotary connection with the upper end cover;

the sealing bearing is sleeved at the upper end of the rotary pipe and is rotationally connected with the rotary pipe;

the water suction pump is arranged on the filter main body through a base, and is driven to operate through the output end of the first driving motor;

the first driving motor is arranged on the filter main body through a base, and an output end of the first driving motor drives the inside of the water suction pump to rotate relatively mechanically;

the second driving motor is arranged on the filter main body through a base, and a first driving gear is fixedly arranged at the output end of the second driving motor;

the second driving gear is fixedly arranged on the rotary tube, and is meshed with the first driving gear;

the flow guide pipe is L-shaped, one end of the flow guide pipe is connected to the outlet of the water suction pump, and the other end of the flow guide pipe is communicated with the water inlet pipe;

the water absorption rods are arranged and are communicated with the rotating pipe, and the water absorption rods are used for absorbing dust which is adhered to the filter screen in a measuring mode.

As still further in this application, the drain mechanism includes a drain pipe and a gate valve;

the drain pipe is fixedly communicated with the lower end of the lower end cover, and the drain pipe is fixedly arranged with the protruding pipeline of the lower end cover;

the gate valve is installed on the drain pipe.

Advantageous effects

Compared with the prior art, the utility model provides the filter for the open circulating water system of the steam turbine of the thermal power plant, which has the following beneficial effects:

1. according to the utility model, the first-stage filtering mechanism is arranged on the water inlet pipe at one side of the filter main body, and the sediment and impurities at the middle and lower layers in the circulating water flowing into the water inlet pipe can be simultaneously along with the direction of flowing to the filter main body, and the impurities precipitated by the circulating water can be firstly precipitated into the first-stage filtering mechanism for first-time filtering, so that the quantity of the impurities entering the filter main body is reduced, the filtering pressure of the second-stage filtering system is reduced, and the service life of each device is prolonged.

2. According to the utility model, the cleaning mechanism is arranged on the water inlet pipe, the water suction pump is utilized to enable the water suction rod connected to the rotary pipe to clean impurities on the inner side of the filter screen, the rotary pipe is driven to rotate by the driving gear of the motor to rotate relatively, the rotary pipe can absorb and clean the impurities on the whole inner side of the inner surface of the filter screen while rotating, the impurities adsorbed to the filter screen are prevented from blocking the filter holes of the filter screen, the filtering effect of the filter screen is affected, the cleaning and replacement frequency of the filter screen is reduced, and the maintenance cost of the filter screen is reduced.

Therefore, the utility model adopts the first-stage and second-stage filtering mechanisms, which can filter harmful substances more effectively than the prior filtering device, and meanwhile, the frequency of cleaning the filter screen can be saved by arranging the cleaning mechanism, thereby improving the filtering efficiency.

Drawings

The utility model will be described in further detail with reference to the drawings and the detailed description.

FIG. 1 is a schematic perspective view of a filter for an open-type circulating water system according to the present application;

FIG. 2 is a schematic partial cross-sectional view of a filter for an open-type circulating water system according to the present application;

FIG. 3 is an exploded schematic view of a secondary filtration mechanism of the filter for an open-cycle water system of the present application;

FIG. 4 is a schematic structural view of a partially enlarged schematic structural view of FIG. 2A of the present application;

fig. 5 is a schematic structural diagram of a partially enlarged structure at B in fig. 2 of the present application.

In the figure: 1. a water inlet pipe; 2. a water outlet pipe; 3. a precipitation tube; 4. a visual window I; 5. butterfly valve; 6. filtering the slideway; 7. a filter plate; 8. an upper end cap; 9. a filter cylinder; 10. a lower end cap; 11. a cover plate; 12. a support plate; 13. a filter screen; 14. a rotary pipe; 15. sealing the bearing; 16. a water suction pump; 17. driving a first motor; 18. a second driving motor; 19. a first driving gear; 20. a second driving gear; 21. a flow guiding pipe; 22. a water absorbing rod; 23. a blow-down pipe; 24. a visual window II; 25. and a gate valve.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 5, the utility model provides a filter for a steam turbine open type circulating water system of a thermal power plant, which comprises a filter main body, a water inlet pipe 1, a water outlet pipe 2, a primary filtering mechanism, a secondary filtering mechanism, a cleaning mechanism and a pollution discharging mechanism, wherein the water inlet pipe 1 and the water outlet pipe 2 are respectively communicated with two sides of the filter main body, the primary filtering mechanism is arranged on one side of the filter main body and is used for carrying out primary filtering on circulating water flowing into the water inlet pipe 1, the secondary filtering mechanism is arranged in the filter main body and is used for carrying out secondary filtering on circulating water flowing into the filter main body, the cleaning mechanism is sealed and penetrates through the filter main body, part of the cleaning mechanism is positioned in the secondary filtering mechanism and is used for cleaning impurities in the secondary filtering mechanism, the pollution discharging mechanism is arranged at the lower end of the filter main body and is used for discharging impurities in the filter main body.

Wherein, the one-level filtering mechanism includes sedimentation tube 3, butterfly valve 5, block filter slide 6, block filter plate 7, sedimentation tube 3 is equipped with a plurality ofly, and a plurality of sedimentation tubes 3 all communicate in the lower extreme of inlet tube 1, install visual window one 4 on the sedimentation tube 3, butterfly valve 5 has a plurality ofly, a plurality of butterfly valves 5 are installed respectively on a plurality of sedimentation tubes 3, block filter plate 6 fixed intercommunication on inlet tube 1, block filter plate 7 installs in block filter slide 6, block filter plate 7 and block filter slide 6 slidable mounting, specific circulating water passes through inflow inlet tube 1, the water flow down the side can be accompanied a large amount of earth sediment and metal precipitation macroparticles, then can carry out preliminary sedimentation after passing through sedimentation tube 3, the circulating water that is through sedimentation tube 1 just can be blocked by the sediment portion of blocking filter plate 3 department of pressing close to the sedimentation tube 3, and when the impurity that blocks 7 is enough, can flow back into sedimentation tube 3, visual window two 24 can assist the observation sediment in sedimentation tube 3, what, the butterfly valve is installed to carry out the butterfly valve 5 outside the rotation of carrying out on the filter plate 3, the drain out the rotation of the filter plate 5 outside the sediment has been accomplished simultaneously, finish the rotation of the impurity on the rotary table is discharged through the filter plate 3.

As shown in fig. 2 to 3, the filter body comprises a filter cylinder 9, an upper end cover 8 and a lower end cover 10, the filter cylinder 9 is located at one side of the water inlet pipe 1, the filter cylinder 9 is fixedly communicated with the water inlet pipe 1, the upper end cover 8 is located at the upper side of the filter cylinder body, a sealing ring is arranged between the upper end cover 8 and the filter cylinder 9, the upper end cover 8 is detachably connected with the filter cylinder 9, the specific filter cylinder 9 is connected with the upper end cover 8 and the lower end cover 10 through a quick-connection assembly, an opening of the upper end cover 8 is rotationally connected with a rotary pipe 14 for fixing the position of the rotary pipe 14, a flange pipe is welded below the opening of the lower end cover 10 for being fixedly connected with a sewage draining mechanism, the specific circulating water precipitated through the first-stage filtering mechanism flows into one layer of the inner filter screen 13 of the filter cylinder 9 along with the water inlet of the filter cylinder 9, flows into the outer side of the filter screen 13 after filtering and is discharged out of the water outlet pipe 2, the function of the cover 11 is mainly to fix the upper side position of the filter screen 13, and the support plate 12 is used as separation before and after filtering the circulating water is filtered, the main body is fixed with the filter cylinder 9, and the fixing position is used for fixing the filter screen 13.

As shown in fig. 2-3, the cleaning mechanism comprises a sealing bearing 15, a water rod, a rotating rod, a water suction pump 16, a guide pipe 21, a first driving motor 17, a second driving motor 18, a rotating pipe 14, a rotating gear 19, a driving gear 20 and a rotating pipe 14, wherein the rotating pipe 14 is installed at the central through hole of the upper end cover 8 in a sealing and penetrating manner, the rotating pipe 14 is in rotating connection with the upper end cover 8, the sealing bearing 15 is sleeved at the upper end of the rotating pipe 14, the sealing bearing 15 is in rotating connection with the rotating pipe 14, the water suction pump 16 is installed on the filter main body through a base, the water suction pump 16 drives the water suction pump 16 to operate through the output end of the first driving motor 17, the first driving motor 17 is installed on the filter main body through the base, the output end of the first driving motor 17 drives the interior of the water suction pump 16 to rotate relatively mechanically, the second driving motor 18 is installed on the filter main body through the base, the output end of the driving motor is fixedly provided with a driving gear 19, and the second driving gear 20 is fixedly installed on the rotating pipe 14, the driving gear II 20 is meshed with the driving gear I19, the guide pipe 21 is L-shaped, one end of the guide pipe 21 is connected to the outlet of the water suction pump 16, the other end of the guide pipe 21 is communicated with the water inlet pipe 1, a plurality of water suction rods 22 are arranged, a plurality of water suction rods 22 are communicated on the rotary pipe 14, the water suction rods 22 are used for absorbing dust adhered in the filter screen 13, the rotation of the rotary pipe 14 is driven by the meshing of the driving gear II 20 and the driving gear I19 at the output end of the specific driving motor II 18, the rotary pipe 14 is sleeved in the water inlet of the water suction pump 16 through the sealing bearing 15, the water suction rods 22 are welded on the rotary pipe 14, the output end of the driving motor I17 drives the water suction pump 16 to work to drive the water suction rods 22 on the rotary pipe 14 to adsorb impurities of the adjacent filter screen 13, the impurities flow to the guide pipe 21 through the water suction pump 16, and the adsorbed impurities circulate water through the guide pipe 21, and re-discharged into the water inlet pipe 1 for filtering impurities again.

The sewage disposal mechanism comprises a sewage disposal pipe 23 and a gate valve 25, the sewage disposal pipe 23 is fixedly communicated with the lower end of the lower end cover 10, the sewage disposal pipe 23 is fixedly arranged with the protruding pipeline of the lower end cover 10, the gate valve 25 is arranged on the sewage disposal pipe 23, and specifically, after the circulating water is filtered by the secondary filtering mechanism, filtered impurities are precipitated to the lower end cover 10 of the filter main body due to gravity and flow into a sewage pipe through a pipeline connected with the lower end cover 10, and the sewage pipe is provided with a visual window 24 which is convenient for checking impurities in the pipe.

In conclusion, this open circulating water system filter filters through one-level and second grade filter equipment, has precipitated large granule impurity in first filtration, reduces the impurity of filter screen 13 attached to in second grade filter equipment to through cleaning device washing filter screen 13, solved the easy problem of jam of filter screen 13 filtration pore in the filter equipment, avoided the condition of frequently changing filter screen 13.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a filter for open circulating water system of steam turbine of thermal power plant, includes filter main part, inlet tube (1) and outlet pipe (2) communicate respectively the both sides of filter main part, its characterized in that still includes:

the primary filtering mechanism is arranged on one side of the filter main body and is used for filtering the circulating water flowing into the water inlet pipe (1) for the first time;

a secondary filtering mechanism provided in the filter main body, the secondary filtering mechanism being for performing a second filtering of the circulating water flowing into the filter main body;

the cleaning mechanism is sealed and arranged on the filter main body in a penetrating way, part of the cleaning mechanism is positioned in the secondary filtering mechanism, and the cleaning mechanism is used for cleaning impurities in the secondary filtering mechanism;

the pollution discharge mechanism is arranged at the lower end of the filter main body and is used for discharging impurities in the filter main body.

2. The filter for a steam turbine open cycle water system of a thermal power plant according to claim 1, wherein the primary filtering mechanism comprises:

the sedimentation pipes (3) are arranged, the sedimentation pipes (3) are communicated with the lower ends of the water inlet pipes (1), and the sedimentation pipes (3) are provided with first visual windows (4);

the butterfly valves (5) are multiple, and the butterfly valves (5) are respectively arranged on the sedimentation pipes (3);

the filtering-blocking slideway (6), the filtering-blocking slideway (6) is fixedly communicated with the water inlet pipe (1);

the filter blocking plate (7), the filter blocking plate (7) is arranged in the filter blocking slide way (6), and the filter blocking plate (7) and the filter blocking slide way (6) are slidably arranged.

3. A filter for a steam turbine open cycle water system of a thermal power plant according to claim 2, wherein the filter body comprises:

the filter cylinder body (9), the said filter cylinder body (9) locates at one side of the said water inlet pipe (1), the said filter cylinder body (9) fixedly communicates with said water inlet pipe (1);

the upper end cover (8) is positioned on the upper side of the filter main body, a sealing ring is arranged between the upper end cover (8) and the filter cylinder (9), and the upper end cover (8) is detachably connected with the filter cylinder (9);

the lower end cover (10), lower end cover (10) are located the downside of filtering barrel (9), lower end cover (10) with filtering barrel (9) can dismantle and be connected, lower end cover (10) with be equipped with the sealing washer in the middle of filtering barrel (9), and be equipped with the through-hole in the middle of lower end cover (10).

4. A filter for a steam turbine open cycle water system of a thermal power plant according to claim 3, wherein the secondary filtering mechanism comprises:

the cover plate (11) is arranged on the inner side of the filtering cylinder body (9), and a through hole is formed in the middle of the cover plate (11);

the support plate (12) is fixedly arranged on the inner side of the filter cylinder (9), and a through hole is formed in the middle of the support plate (12);

the filter screen (13), the filter screen (13) is installed in the upper end of backup pad (12), and filter screen (13) are located the central point of backup pad (12).

5. The filter for a steam turbine open cycle water system of a thermal power plant according to claim 4, wherein the cleaning mechanism comprises:

the rotary pipe (14) is hermetically and penetratingly arranged at the central through hole of the upper end cover (8), and the rotary pipe (14) is rotationally connected with the upper end cover (8);

the sealing bearing (15) is sleeved at the upper end of the rotary pipe (14), and the sealing bearing (15) is rotationally connected with the rotary pipe (14);

the water suction pump (16) is arranged on the filter main body through a base, and the water suction pump (16) drives the water suction pump (16) to operate through the output end of a first driving motor (17);

the first driving motor (17) is arranged on the filter main body through a base, and the output end of the first driving motor (17) drives the inside of the water suction pump (16) to rotate relatively to the machine;

the second driving motor (18) is arranged on the filter main body through a base, and a first driving gear (19) is fixedly arranged at the output end of the second driving motor;

the second driving gear (20) is fixedly arranged on the rotary tube (14), and the second driving gear (20) is meshed with the first driving gear (19);

the guide pipe (21), the guide pipe (21) is L-shaped, one end of the guide pipe (21) is connected to the outlet of the water suction pump (16), and the other end of the guide pipe (21) is communicated with the water inlet pipe (1);

the water absorbing rods (22), the water absorbing rods (22) are arranged in a plurality, the water absorbing rods (22) are all communicated with the rotating pipe (14), and the water absorbing rods (22) are used for absorbing dust adhered to the filter screen (13) in a measuring mode.

6. The filter for a steam turbine open cycle water system of a thermal power plant according to claim 5, wherein the blowdown mechanism comprises:

the drain pipe (23) is fixedly communicated with the lower end of the lower end cover (10), and the drain pipe (23) is fixedly installed with the protruding pipeline of the lower end cover (10);

and a gate valve (25), wherein the gate valve (25) is installed on the drain pipe (23).