阅读说明：本技术 一种燃煤电厂污泥储存和上料系统 (Sludge storage and feeding system of coal-fired power plant ) 是由 李德波 孙超凡 冯永新 廖宏楷 陈拓 曾庭华 周杰联 于 2019-10-24 设计创作，主要内容包括：本发明公开了一种燃煤电厂污泥储存和上料系统,包括依次连接的湿污泥储存仓、污泥干化装置和煤粉单元,煤粉单元包括依次连接的给煤机、磨煤机和锅炉；湿污泥储存仓的出料口连接污泥干化装置的进料口,污泥干化装置的出料口连接给煤机的进料口,给煤机的出料口连接磨煤机的进料口,磨煤机的出料口连接锅炉的进料口。本发明将污泥直接输送至给煤机处与煤粉混合,之后经磨煤机送入锅炉燃烧。避免了将污泥在煤场与煤进行混合后再经输煤系统输送至锅炉,因此可避免污泥掺烧容易导致输煤系统堵塞的问题。进一步的,本发明在污泥掺烧之前还将湿污泥经过污泥干化装置干化脱水,使污泥燃烧更加充分且避免污泥含水影响锅炉的温度。(The invention discloses a sludge storage and feeding system of a coal-fired power plant, which comprises a wet sludge storage bin, a sludge drying device and a coal powder unit which are sequentially connected, wherein the coal powder unit comprises a coal feeder, a coal pulverizer and a boiler which are sequentially connected; the discharge port of the wet sludge storage bin is connected with the feed port of the sludge drying device, the discharge port of the sludge drying device is connected with the feed port of the coal feeder, the discharge port of the coal feeder is connected with the feed port of the coal pulverizer, and the discharge port of the coal pulverizer is connected with the feed port of the boiler. The invention directly conveys the sludge to a coal feeder to be mixed with coal powder, and then the sludge is conveyed to a boiler for combustion through a coal mill. The problem that the sludge is mixed with coal in a coal yard and then is conveyed to a boiler through a coal conveying system is avoided, so that the blockage of the coal conveying system caused by the mixed combustion of the sludge can be avoided. Furthermore, the wet sludge is dried and dehydrated by the sludge drying device before the sludge is mixed and burnt, so that the sludge is more fully burnt and the influence of the water content of the sludge on the temperature of the boiler is avoided.)

1. A sludge storage and feeding system of a coal-fired power plant is characterized by comprising a wet sludge storage bin, a sludge drying device and a coal powder unit which are sequentially connected, wherein the coal powder unit comprises a coal feeder, a coal pulverizer and a boiler which are sequentially connected;

the discharge gate in storehouse is stored to wet mud is connected the feed inlet of sludge drying device, the discharge gate of sludge drying device is connected the feed inlet of feeder, the discharge gate of feeder is connected the feed inlet of coal pulverizer, the discharge gate of coal pulverizer is connected the feed inlet of boiler.

2. The coal fired power plant wet sludge storage and feeding system of claim 1, wherein said wet sludge storage bin is an underground wet sludge storage bin; the top surface of the wet sludge storage bin is provided with a sludge inlet, and the sludge inlet is provided with a sealed bin door;

the bottom of the wet sludge storage bin is in an inverted trapezoid shape, a sludge outlet is formed in the bottom surface of the inverted trapezoid shape, and a spiral unloader is arranged at the sludge outlet; the bottom of the inverted trapezoid is provided with an arch breaking sliding frame used for conveying sludge to the sludge outlet, and the arch breaking sliding frame is connected with an arch breaking sliding frame driving piece used for driving the arch breaking sliding frame to move;

the discharge port of the spiral unloader is connected with a sludge discharge pipe, the discharge port of the sludge discharge pipe is connected with a sludge feeding pipe through a sludge feeding pump, and the discharge port of the sludge feeding pipe is connected with the feed port of the sludge drying device.

3. The coal fired power plant wet sludge storage and feeding system of claim 2 wherein said arch breaking carriage drive is a hydraulic cylinder; the screw unloader is an electric single-shaft screw unloader, and the sludge feeding pump is a screw pump; and a gate valve is arranged on the sludge discharging pipe.

4. The coal-fired power plant wet sludge storage and feeding system of claim 1, wherein an ultrasonic level meter, a rotation-resistant level meter, a level display device and a level alarm device are arranged in the wet sludge storage bin; the ultrasonic material level meter and the rotation-resistant material level meter are both connected with the material level display device, and the material level display device is connected with the material level alarm device.

5. The wet sludge storage and feeding system of the coal-fired power plant as claimed in claim 1, wherein a storage bin odor pumping and discharging port is formed on the wet sludge storage bin, the storage bin odor pumping and discharging port is connected with a noncondensable gas conveying pipeline through a storage bin odor exhaust fan, a gas outlet of the noncondensable gas conveying pipeline is connected with a gas dehumidifying device, and a gas outlet of the gas dehumidifying device is connected with a gas inlet of the boiler through a blower; and a water outlet of the gas dehumidifying device is connected with a condensed sewage tank.

6. The coal-fired power plant wet sludge storage and feeding system of claim 1, wherein a methane concentration detector is arranged in the wet sludge storage bin, a methane vent is arranged on the wet sludge storage bin, an automatic ventilation device is arranged at the methane vent, and the methane concentration detector is connected with the automatic ventilation device.

7. The coal-fired power plant wet sludge storage and feeding system as in claim 1, wherein the wet sludge storage bin has a top surface access opening opened on a top surface thereof, a side surface access opening opened on a side surface thereof, an access platform provided on one side thereof, a guardrail provided on the access platform, and the access platform extending to the top surface access opening and the side surface access opening.

8. The wet sludge storage and feeding system of a coal-fired power plant as claimed in claim 1, wherein said wet sludge storage and feeding system of a coal-fired power plant comprises a plurality of said coal mills, said plurality of coal mills being arranged in sequence from top to bottom; the boiler is provided with a plurality of feeding ports which are sequentially arranged from top to bottom, and the plurality of feeding ports of the boiler correspond to the plurality of coal mills one by one;

and the discharge hole of the coal feeder is connected with the feed hole of at least one coal mill positioned above the coal feeder.

9. The wet sludge storage and feeding system of coal-fired power plant as claimed in claim 2, wherein the wet sludge storage and feeding system of coal-fired power plant comprises a discharging room, the sludge inlet is arranged in the discharging room, an automatic spraying and deodorizing atomization device is arranged in the discharging room, the automatic spraying and deodorizing atomization device comprises a deodorant storage cavity, the deodorant storage cavity is connected with a spraying pipeline, the spraying pipeline is arranged at the top of the discharging room, and a plurality of atomization nozzles are arranged on the spraying pipeline.

10. The wet sludge storage and feeding system of a coal-fired power plant as recited in claim 1 wherein the discharge port of the sludge drying device is connected to the feed port of the coal feeder by a uniform distributor.

Technical Field

The invention relates to the field of sludge treatment, in particular to a sludge storage and feeding system for a coal-fired power plant.

Background

In recent years, the coal-fired power plant carries out sludge co-combustion so as to reasonably utilize the sludge. However, in the prior art, sludge and coal are mainly mixed in a coal yard, and then the mixed sludge and coal are conveyed to a boiler for combustion through an existing coal conveying system, but the sludge generally has high viscosity, the coal conveying system is easy to block by using the existing coal conveying system, and wet sludge is easy to be insufficiently combusted when conveyed to the boiler and influences the temperature of the boiler, so that the problem of sludge feeding is urgently needed to be solved.

Disclosure of Invention

The invention aims to provide a sludge storage and feeding system for a coal-fired power plant to solve the problems.

In order to achieve the purpose, the invention adopts the following technical scheme:

a sludge storage and feeding system of a coal-fired power plant comprises a wet sludge storage bin, a sludge drying device and a coal powder unit which are sequentially connected, wherein the coal powder unit comprises a coal feeder, a coal pulverizer and a boiler which are sequentially connected;

the discharge gate in storehouse is stored to wet mud is connected the feed inlet of sludge drying device, the discharge gate of sludge drying device is connected the feed inlet of feeder, the discharge gate of feeder is connected the feed inlet of coal pulverizer, the discharge gate of coal pulverizer is connected the feed inlet of boiler.

Optionally, the wet sludge storage bin is an underground wet sludge storage bin; the top surface of the wet sludge storage bin is provided with a sludge inlet, and the sludge inlet is provided with a sealed bin door;

the bottom of the wet sludge storage bin is in an inverted trapezoid shape, a sludge outlet is formed in the bottom surface of the inverted trapezoid shape, and a spiral unloader is arranged at the sludge outlet; the bottom of the inverted trapezoid is provided with an arch breaking sliding frame used for conveying sludge to the sludge outlet, and the arch breaking sliding frame is connected with an arch breaking sliding frame driving piece used for driving the arch breaking sliding frame to move;

the discharge port of the spiral unloader is connected with a sludge discharge pipe, the discharge port of the sludge discharge pipe is connected with a sludge feeding pipe through a sludge feeding pump, and the discharge port of the sludge feeding pipe is connected with the feed port of the sludge drying device.

Optionally, the arch breaking sliding frame driving part is a hydraulic cylinder; the spiral unloader is an electric single-shaft spiral unloader, and is controlled by frequency conversion; and a gate valve is arranged on the sludge discharging pipe.

Optionally, an ultrasonic material level meter, a rotation-resistant material level meter, a material level display device and a material level alarm device are arranged in the wet sludge storage bin; the ultrasonic material level meter and the rotation-resistant material level meter are both connected with the material level display device, and the material level display device is connected with the material level alarm device.

Optionally, a storage bin odor pumping and discharging opening is formed in the wet sludge storage bin, the storage bin odor pumping and discharging opening is connected with a noncondensable gas conveying pipeline through a storage bin odor exhaust fan, a gas outlet of the noncondensable gas conveying pipeline is connected with a gas dehumidifying device, and a gas outlet of the gas dehumidifying device is connected with a gas inlet of the boiler through a blower; and a water outlet of the gas dehumidifying device is connected with a condensed sewage tank.

Optionally, the storehouse is stored to wet mud is equipped with methane concentration detector, the storehouse is stored to wet mud has seted up the methane vent, methane vent department is equipped with automatic ventilation unit, methane concentration detector connects automatic ventilation unit.

Optionally, the top surface access hole has been seted up to the top surface in storehouse is stored to wet mud, the side access hole has been seted up to the side in storehouse is stored to wet mud, one side in storehouse is stored to wet mud is equipped with overhauls the platform, it is equipped with the guardrail on the maintenance platform, it extends to overhaul the platform top surface access hole department with side access hole department.

Optionally, the wet sludge storage and feeding system of the coal-fired power plant comprises a plurality of coal mills, and the coal mills are sequentially arranged from top to bottom; the boiler is provided with a plurality of feeding ports which are sequentially arranged from top to bottom, and the plurality of feeding ports of the boiler correspond to the plurality of coal mills one by one;

and the discharge hole of the coal feeder is connected with the feed hole of at least one coal mill positioned above the coal feeder.

Optionally, a coal fired power plant wet sludge stores and feeding system is including unloading within a definite time, sludge inlet locates in unloading within a definite time, be equipped with automatic spray deodorization atomizing device in the unloading within a definite time, automatic spray deodorization atomizing device includes that the deodorant stores the chamber, the deodorant stores the chamber and is connected with spray line, spray line locates the top between unloading, the last a plurality of atomizing nozzle that is equipped with of spray line.

Optionally, the discharge port of the sludge drying device is connected with the feed port of the coal feeder through an even distributor.

Compared with the prior art, the invention has the following beneficial effects:

the invention directly conveys the sludge to a coal feeder to be mixed with coal powder, and then the sludge is conveyed to a boiler for combustion through a coal mill. The problem that the sludge is mixed with coal in a coal yard and then is conveyed to a boiler through a coal conveying system is avoided, so that the blockage of the coal conveying system caused by the mixed combustion of the sludge can be avoided. Furthermore, the wet sludge is dried and dehydrated by the sludge drying device before the sludge is mixed and burnt, so that the sludge is more fully burnt and the influence of the water content of the sludge on the temperature of the boiler is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention.

FIG. 1 is a schematic structural diagram of a sludge storage and feeding system of a coal-fired power plant provided by an embodiment of the invention;

fig. 2 is an enlarged schematic view of region a in fig. 1.

Illustration of the drawings: 1. a wet sludge storage bin; 11. sealing the bin gate; 12. a screw unloader; 13. an arch breaking carriage; 14. a sludge discharge pipe; 141. a gate valve; 15. a screw pump; 16. a sludge feeding pipe; 17. overhauling the platform; 2. a sludge drying device; 31. a coal feeder; 32. a coal mill; 33. a boiler; 41. an odor exhaust fan; 42. a non-condensable gas delivery conduit; 43. a gas dehumidifying device; 44. a blower; 45. an odor pumping and discharging pipeline of the discharging room; 451. an odor pumping and discharging port of the discharging room; 51. a deodorant storage chamber; 52. a spray pipe; 53. an atomizing nozzle.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Referring to fig. 1, an embodiment of the present invention provides a sludge storage and feeding system for a coal-fired power plant, including a wet sludge storage bin 1, a sludge drying device 2, and a coal dust unit, which are connected in sequence, where the coal dust unit includes a coal feeder 31, a coal pulverizer 32, and a boiler 33, which are connected in sequence.

The discharge port of the wet sludge storage bin 1 is connected with the feed port of the sludge drying device 2, the discharge port of the sludge drying device 2 is connected with the feed port of a coal feeder 31, the discharge port of the coal feeder 31 is connected with the feed port of a coal mill 32, and the discharge port of the coal mill 32 is connected with the feed port of a boiler 33.

The invention directly conveys the sludge to a coal feeder 31 to be mixed with coal powder, and then the sludge is conveyed to a boiler 33 to be combusted through a coal mill 32. The problem that the sludge is mixed with coal in a coal yard and then is conveyed to the boiler 33 through the coal conveying system is avoided, so that the blockage of the coal conveying system caused by the mixed combustion of the sludge can be avoided. Furthermore, the wet sludge is dried and dehydrated by the sludge drying device 2 before the sludge is mixed and burnt, so that the sludge is more fully burnt and the influence of the water content of the sludge on the temperature of the boiler 33 is avoided.

In the embodiment of the invention, the discharge hole of the sludge drying device 2 is connected with the feed hole of the coal feeder 31 through the uniform distributor, so that the sludge can be uniformly mixed.

In the embodiment of the invention, the wet sludge storage and feeding system of the coal-fired power plant comprises a plurality of coal mills 32, and the coal mills 32 are sequentially arranged from top to bottom. The boiler 33 is provided with a plurality of feeding ports which are sequentially arranged from top to bottom, and the plurality of feeding ports of the boiler 33 correspond to the plurality of coal mills 32 one by one. The discharge port of the coal feeder 31 is connected with the feed port of at least one coal mill 32 located above.

The present invention allows sludge to be burned in the upper portion of the boiler 33 by incorporating the sludge into the coal mill 32 located above. The upper part of the boiler 33 has high temperature, which can ensure thorough combustion of the sludge. Specifically, the number of the coal mills 32 is preferably six.

Referring to fig. 1 and 2, in the embodiment of the present invention, the wet sludge storage silo 1 is an underground wet sludge storage silo. The top surface of the wet sludge storage bin 1 is provided with a sludge inlet, and the sludge inlet is provided with a sealed bin door 11. The bottom of the wet sludge storage bin 1 is in an inverted trapezoid shape, a sludge outlet is formed in the bottom surface of the inverted trapezoid shape, and a spiral unloader 12 is arranged at the sludge outlet. The bottom of the inverted trapezoid is provided with an arch breaking sliding frame 13 used for conveying sludge to a sludge outlet, and the arch breaking sliding frame 13 is connected with an arch breaking sliding frame driving piece used for driving the arch breaking sliding frame 13 to move.

The discharge port of the screw discharger 12 is connected with a sludge discharge pipe 14, the discharge port of the sludge discharge pipe 14 is connected with a sludge feeding pipe 16 through a sludge feeding pump, and the discharge port of the sludge feeding pipe 16 is connected with the feed port of the sludge drying device 2. Wherein, the sludge discharging pipe 14 and the sludge feeding pipe 16 are preferably seamless steel pipes or ultra-low friction wear-resistant composite pipes.

Specifically, the arch breaking sliding frame driving part is a hydraulic cylinder, the screw unloader 12 is an electric single-shaft screw unloader, and the sludge feeding pump is a screw pump 15. The screw discharger 12 is controlled by frequency conversion to cooperate with a screw pump 15. The sludge discharging pipe 14 is provided with a gate valve 141.

Specifically, the outer periphery of the cross section of the arch breaking sliding frame 13 is of a wedge-shaped structure, and the inner side of the cross section is of a vertical surface structure. In the driven reciprocating motion process of the arch breaking sliding frame 13, the wedge-shaped structure can scoop up the sludge, and the vertical surface structure can effectively push the sludge into the discharging equipment. The reciprocating motion of the arch-breaking sliding frame 13 at the bottom of the bin can effectively prevent sludge from bridging near a sludge outlet, and the working surface of the arch-breaking sliding frame 13 covers the whole bin bottom to ensure that no dead angle exists at the bin bottom.

The invention is beneficial to discharging sludge from the wet sludge storage bin 1 through the arrangement of the spiral unloader 12, the arch breaking sliding frame 13, the inverted trapezoidal bin bottom and the like. The sealing bin door 11 can effectively prevent odor from escaping. The wet sludge storage bin 1 is a round bin, and the bin body is not provided with any rib plate structure, so that smooth sludge discharge is ensured.

In the embodiment of the invention, an ultrasonic material level meter, a rotation-resistant material level meter, a material level display device and a material level alarm device are arranged in the wet sludge storage bin 1. The ultrasonic level indicator and the rotation-resistant level indicator are both connected with a level display device, and the level display device is connected with a level alarm device. The invention carries out online monitoring on the sludge material level through the ultrasonic wave material level meter and the rotation-resistant material level meter and displays the material level height on line through the material level display device. The invention specifically sets four material level alarm points of ultra-low level, high level and ultra-high level, warns workers that sludge can not be added into the wet sludge storage bin 1 when the material level is too high, and warns workers to replenish sludge into the wet sludge storage bin 1 in real time when the material level is too low.

In the embodiment of the invention, a methane concentration detector is arranged in the wet sludge storage bin 1, a methane vent is arranged on the wet sludge storage bin 1, an automatic ventilation device is arranged at the methane vent, and the methane concentration detector is connected with the automatic ventilation device. When the methane concentration is too high, the methane concentration is reduced through the automatic ventilation device, so that the potential safety hazard caused by the high methane concentration is avoided.

In the embodiment of the invention, a top surface access hole is formed in the top surface of the wet sludge storage bin 1, a side surface access hole is formed in the side surface of the wet sludge storage bin 1, an access platform 17 is arranged on one side of the wet sludge storage bin 1, a guardrail is arranged on the access platform 17, and the access platform 17 extends to the top surface access hole and the side surface access hole. Wherein, the diameter of top surface access hole is greater than 700mm, and the diameter of side access hole is greater than 900 mm.

In the embodiment of the invention, an odor pumping and discharging port of a storage bin is formed on a wet sludge storage bin 1, the odor pumping and discharging port of the storage bin is connected with a noncondensable gas conveying pipeline 42 through an odor exhaust fan 41, an air outlet of the noncondensable gas conveying pipeline is connected with an air dehumidifying device 43, an air outlet of the air dehumidifying device 43 is connected with an air inlet of a boiler 33 through a blower 44, and a water outlet of the air dehumidifying device 43 is connected with a condensed sewage tank. The invention keeps the micro-negative pressure state in the wet sludge storage bin 1 through the storage bin odor exhaust fan 41, thereby avoiding odor leakage. Specifically, the maximum air suction volume of the storage bin odor air exhauster 41 is set to be 20% of the total forced air exhaust volume of the wet sludge storage bin 1, wherein the total forced air exhaust volume can be calculated according to the volume of the wet sludge storage bin 1 and related national standards.

In the embodiment of the invention, the sludge storage and feeding system of the coal-fired power plant also comprises a discharging room, and the sludge inlet is arranged in the discharging room. Be equipped with automatic spray deodorization atomizing device in unloading the room, automatic spray deodorization atomizing device includes that deodorant stores chamber 51, and deodorant stores chamber 51 is connected with spray line 52, and spray line 52 locates the top of unloading the room, is equipped with a plurality of atomizing nozzle 53 on the spray line 52. Further, an odor pumping and discharging pipeline 45 of the discharging room is arranged in the discharging room, a plurality of odor pumping and discharging ports 451 of the discharging room are formed in the odor pumping and discharging pipeline 45 of the discharging room, and the odor pumping and discharging pipeline 45 of the discharging room is connected with the non-condensable gas conveying pipeline 42 through an odor exhaust fan 41.

The deodorant is preferably natural plant extract, does not contain toxic and harmful substances, is safe to environment, does not contain pesticide residues and chemical synthetics, has the capability of remarkably decomposing organic odor source substances such as ammonia, hydrogen sulfide, methyl mercaptan, trimethylamine and the like, and does not generate toxicity and irritation to human bodies.

The invention collects the odor, dehumidifies the odor by the gas dehumidifying device 43, and sends the odor to the boiler 33 for combustion, thereby avoiding the environmental pollution caused by the sludge odor.

The wet sludge storage and feeding system of the coal-fired power plant preferably comprises two sludge storage bins which are used and prepared, so that stable sludge blending combustion is guaranteed.

The invention directly conveys the sludge to a coal feeder 31 to be mixed with coal powder, and then the sludge is conveyed to a boiler 33 to be combusted through a coal mill 32. The problem that the sludge is mixed with coal in a coal yard and then is conveyed to the boiler 33 through the coal conveying system is avoided, so that the blockage of the coal conveying system caused by the mixed combustion of the sludge can be avoided. Furthermore, the wet sludge is dried and dehydrated by the sludge drying device 2 before the sludge is mixed and burnt, so that the sludge is more fully burnt and the influence of the water content of the sludge on the temperature of the boiler 33 is avoided. In addition, the invention collects odor through devices such as an odor exhaust fan 41 of the storage bin and the like and conveys the odor to the boiler 33 for combustion, thereby preventing sludge odor from polluting the environment.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.