CN110280349B

CN110280349B - Energy-saving combustion system of industrial boiler

Info

Publication number: CN110280349B
Application number: CN201910578045.XA
Authority: CN
Inventors: 孙安杰; 黄广顺; 郑智
Original assignee: Mohe Huapeng Heating Co ltd
Current assignee: Mohe Huapeng Heating Co ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2021-07-30
Anticipated expiration: 2039-06-28
Also published as: CN110280349A

Abstract

The invention relates to the technical field of industrial boilers, in particular to an energy-saving combustion system of an industrial boiler, which comprises a combustion furnace, a feeding pipe, a crushing structure, a coal injection structure and an anti-blocking structure; through the setting of crushing structure, can carry out abundant crushing to the piling up time overlength and the buggy piece that has taken place to harden, thereby can guarantee that the buggy that gets into combustion furnace inside is the likepowder, can increase the combustion rate of buggy, then reach energy-conserving effect, and crushing structure can also drive the continuous emergence vibrations of preventing blockking up the structure in work, can prevent kibbling buggy from blockking up the inlet pipe promptly, simultaneously because prevent blockking up the structure can continuous change crushing structure and prevent the distance between the blockking up the structure in continuous vibrations in-process, thereby make prevent blockking up and also can react to crushing structure messenger crushing structure can be better crushing, and crushing structure can also drive coal injection structure work in work, work through coal injection structure can make the more abundant of buggy burning.

Description

Energy-saving combustion system of industrial boiler

Technical Field

The invention relates to the technical field of industrial boilers, in particular to an energy-saving combustion system of an industrial boiler.

Background

The industrial boiler products are divided into two types, namely steam for power generation or gas supply, for example, a fertilizer plant can use steam for vaporization, coal is used as a raw material to synthesize fertilizers, the typical industrial boiler is also mostly made of coal, and a fuel gas is generally used as a waste heat boiler for recovering waste heat. Industrial boilers are commonly known as circulating fluidized bed boilers, which are important thermal power plants.

In order to improve the coal burning efficiency of the industrial boiler, some coal blocks are crushed into coal powder, but the coal powder is hardened into blocks in the long-time placing process, and if the block coal powder is directly placed into the industrial boiler for burning, the burning efficiency of the coal powder is reduced.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides an energy-saving combustion system of an industrial boiler.

The technical scheme adopted by the invention for solving the technical problems is as follows: an energy-saving combustion system of an industrial boiler comprises a combustion furnace, a feeding pipe, a crushing structure, a coal injection structure and an anti-blocking structure, wherein the feeding pipe used for being connected with an external coal inlet pipe is fixed at the top end of the combustion furnace used for burning pulverized coal and exchanging heat; the inside of the feeding pipe is connected with the crushing structure for crushing the agglomerated coal dust, and the inside of the feeding pipe is connected with the coal injection structure for blowing and spraying the coal dust crushed by the crushing structure; the inside of the feeding pipe is connected with an anti-blocking structure for preventing pulverized coal from blocking the feeding pipe.

It is specific, crushing structure includes motor spindle, connecting plate, rolls board and crushing tooth, motor spindle rotate connect in the inside of inlet pipe, motor spindle's outside is that the annular array distributes and has four cuboid structures the connecting plate, four the connecting plate deviates from motor spindle's one end all is fixed with roll board, roll board's length with the length of connecting plate is the same, just roll board's cross-section is circular structure, four roll board's outside all is equipped with smash the tooth, every it all is equipped with a plurality ofly to roll on the board smash the tooth, and a plurality of smash the tooth be annular array distribute in roll board's outside, the cross-section of smashing the tooth is the triangle-shaped structure.

Specifically, prevent that the jam structure includes filter screen, pivot, fixed column and second spring, the filter screen is located the inside of inlet pipe, just the filter screen passes through the pivot with the inlet pipe rotates to be connected, the filter screen with the turned angle of inlet pipe is 0-5, just the center cross-section of filter screen is semi-annular structure, motor spindle's outside fixed cylinder structure the fixed column, just the fixed column deviates from motor spindle's one end is the arc structure, the bottom of filter screen with connect between the inlet pipe the second spring, motor spindle's central point arrives smash the outermost distance of tooth and be less than motor spindle arrives the distance of filter screen.

Specifically, the coal injection structure comprises a connecting pipe, a fixed pipe, an outlet pipe, a squeezing rod, a pressing plate, an air bag and a first spring, the pressing plate is in a cuboid structure and is connected with the inside of the inlet pipe in a sliding manner, the pressing plate is connected with the inlet pipe through the air bag, the pressing plate is clamped with the first spring between the inlet pipe, the first spring is in parallel relation with the air bag, the squeezing rod is in an external fixed cylinder structure of the motor main shaft, one end, deviating from the motor main shaft, of the squeezing rod is in an arc-shaped structure, the outlet pipe is fixed on the outside of the inlet pipe, the outlet pipe is provided with a plurality of outlet pipes, the outlet pipes are linearly distributed, the outlet pipes are all in 45-degree included angles with the inlet pipe, the inside of the outlet pipes is communicated with the inside of the inlet pipe, and the fixed pipe is fixed at one end, deviating from the inlet pipe, and the inside of fixed pipe all with a plurality of the inside of outlet duct communicates with each other, fixed pipe with be connected with between the inlet pipe the connecting pipe, just the connecting pipe with the gasbag with the inside of fixed pipe all communicates with each other.

The invention has the beneficial effects that:

(1) the energy-saving combustion system of the industrial boiler can fully crush the coal dust blocks which are too long in accumulation time and hardened through the arrangement of the crushing structure, thereby ensuring that the coal dust entering the combustion furnace is powdery, increasing the combustion rate of the coal dust, further achieving the energy-saving effect, driving the anti-blocking structure to vibrate continuously while the crushing structure works, preventing the crushed coal dust from blocking the feeding pipe, simultaneously, continuously changing the distance between the crushing structure and the anti-blocking structure during the continuous vibration process of the anti-blocking structure, enabling the anti-blocking structure to react on the crushing structure to crush the crushing structure better, driving the coal injection structure to work while the crushing structure works, and enabling the crushed coal dust of the crushing structure to be discharged in a spraying mode through the work of the coal injection structure, thereby enabling the pulverized coal to be more fully combusted.

(2) The energy-saving combustion system of the industrial boiler can crush hardened coal dust blocks by driving the connecting plate to rotate by the motor spindle in the rotating process, the grinding plate with a circular section is fixed at one end of the connecting plate, which is away from the motor spindle, so that the contact area between the connecting plate and the coal dust blocks can be increased, and a better crushing effect can be achieved, and the crushing teeth arranged on the grinding plate can further achieve a better crushing effect, the fixed column can be driven to continuously extrude the filter screen while the motor spindle rotates, the filter screen can continuously vibrate under the continuous extrusion of the fixed column by the matching of the rotating shaft and the second spring, so that the filter screen can be prevented from being blocked, and the distance between the filter screen and the crushing teeth is continuously changed in the continuous vibrating process, so that the crushing teeth can achieve a better crushing effect, and in motor spindle pivoted, the extrusion clamp plate that the extrusion pole also can be continuous, the extrusion gasbag that the clamp plate will be continuous, thereby can aerify the inside of gasbag, and the elastic action through the second spring, can help the quick reset of gasbag, guarantee that the gasbag can work always, the inside of a plurality of outlet ducts of gas access through connecting pipe and fixed pipe that the inside production of gasbag, again from a plurality of outlet ducts that are 45 contained angles with the inlet pipe inflow, thereby can blow the work to the buggy, make the buggy be the state entering combustion furnace with spraying, reach better combustion rate.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural diagram of the overall structure of a preferred embodiment of the industrial boiler energy-saving combustion system provided by the invention;

FIG. 2 is a schematic view of the connection of the feed pipe and the coal injection structure shown in FIG. 1;

FIG. 3 is a schematic view of a connection structure of the pulverizing structure and the filtering net shown in FIG. 2;

FIG. 4 is a schematic view of the connection structure of the motor spindle and the coal injection structure shown in FIG. 2;

fig. 5 is a schematic structural view of the filter screen shown in fig. 2.

In the figure: 1. the device comprises a combustion furnace, 2, a feeding pipe, 3, a crushing structure, 31, a motor spindle, 32, a connecting plate, 33, a grinding plate, 34, crushing teeth, 4, a coal injection structure, 41, a connecting pipe, 42, a fixed pipe, 43, an air outlet pipe, 44, an extrusion rod, 45, a pressing plate, 46, an air bag, 47, a first spring, 5, an anti-blocking structure, 51, a filter screen, 52, a rotating shaft, 53, a fixed column, 54 and a second spring.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1-5, the energy-saving combustion system of an industrial boiler according to the present invention comprises a combustion furnace 1, a feeding pipe 2, a pulverizing structure 3, a coal injection structure 4 and an anti-clogging structure 5, wherein the feeding pipe 2 for connecting an external coal feeding pipe is fixed at the top end of the combustion furnace 1 for pulverized coal combustion and heat exchange; the inside of the feeding pipe 2 is connected with the crushing structure 3 for crushing the agglomerated coal dust, and the inside of the feeding pipe 2 is connected with the coal injection structure 4 for blowing and spraying the coal dust crushed by the crushing structure 3; the inside of the feeding pipe 2 is connected with the anti-blocking structure 5 for preventing pulverized coal from blocking the feeding pipe 2.

Specifically, the crushing structure 3 comprises a motor main shaft 31, a connecting plate 32, a rolling plate 33 and crushing teeth 34, wherein the motor main shaft 31 is rotatably connected inside the feeding pipe 2, the outer part of the motor main shaft 31 is an annular array and is provided with the connecting plate 32 with four cuboid structures, one end of each of the four connecting plates 32 departing from the motor main shaft 31 is fixedly provided with the rolling plate 33, the length of the rolling plate 33 is equal to that of the connecting plate 32, the cross section of the rolling plate 33 is a circular structure, the outer parts of the four rolling plates 33 are respectively provided with the crushing teeth 34, each rolling plate 33 is provided with a plurality of the crushing teeth 34, the crushing teeth 34 are annularly arrayed and are distributed outside the rolling plate 33, the cross section of the crushing teeth 34 is a triangular structure, and when in use, the motor fixed on the feeding pipe 2 is electrically connected with an external power supply, the motor can drive the motor main shaft 31 to normally rotate, then the two flange pipes on the feeding pipe 2 are connected with an external coal inlet pipe, so that coal dust blocks can enter the feeding pipe 2, then various pipelines on the combustion furnace are connected, after the preparation work of the combustion furnace is finished, the combustion furnace is subjected to combustion work, when the motor main shaft 31 rotates, the motor main shaft 31 drives the connecting plate 32 to rotate in the rotating process, so that hardened coal dust blocks can be crushed, the grinding plate 33 with a circular cross section is fixed at one end of the connecting plate 32, which is far away from the motor main shaft 31, so that the contact area between the connecting plate 32 and the coal dust blocks can be increased, a better crushing effect can be achieved, and through the arrangement of the grinding teeth 34 arranged on the grinding plate 33, the effect of better pulverizability can be further achieved.

Specifically, the anti-clogging structure 5 includes a filter screen 51, a rotating shaft 52, a fixing column 53 and a second spring 54, the filter screen 51 is disposed inside the feeding pipe 2, the filter screen 51 is rotatably connected to the feeding pipe 2 through the rotating shaft 52, the rotation angle of the filter screen 51 and the feeding pipe 2 is 0-5 °, the center section of the filter screen 51 is a semi-annular structure, the fixing column 53 of the cylinder structure is fixed outside the motor spindle 31, one end of the fixing column 53 away from the motor spindle 31 is an arc-shaped structure, the second spring 54 is connected between the bottom end of the filter screen 51 and the feeding pipe 2, the distance from the center point of the motor spindle 31 to the outermost end of the crushing teeth 34 is smaller than the distance from the motor spindle 31 to the filter screen 51, and when the motor spindle 31 rotates, can drive the continuous extrusion of fixed column 53 the 51 filter screen, because the filter screen 51 passes through pivot 52 with inlet pipe 2 rotates to be connected, just the filter screen 51 with be connected with between the inlet pipe 2 second spring 54, through pivot 52 with the cooperation of second spring 54 is used, makes the filter screen 51 can constantly shake under the continuous extrusion of fixed column 53, thereby can avoid filter screen 51 blocks up, and because filter screen 51 constantly shake the in-process change constantly with smash the distance of tooth 34, thereby can make it reaches better crushing effect to smash tooth 34.

Specifically, coal injection structure 4 includes connecting pipe 41, fixed pipe 42, outlet duct 43, extrusion pole 44, clamp plate 45, gasbag 46 and first spring 47, the cuboid structure clamp plate 45 sliding connection in the inside of inlet pipe 2, clamp plate 45 with connect between the inlet pipe 2 gasbag 46, just clamp plate 45 with centre gripping between the inlet pipe 2 first spring 47, just first spring 47 with be parallel relation between the gasbag 46, motor spindle 31's external fixation cylinder structure extrusion pole 44, just extrusion pole 44 deviates from the one end of motor spindle 31 is the arc structure, inlet pipe 2's external fixation has outlet duct 43, outlet duct 43 is equipped with a plurality ofly, and is a plurality of outlet duct 43 is linear distribution, and a plurality of outlet duct 43 all with inlet pipe 2 is 45 contained angles, the insides of the outlet pipes 43 are communicated with the insides of the inlet pipes 2, one end of each of the outlet pipes 43, which is far away from the inlet pipe 2, is fixed with the fixed pipe 42, the inside of the fixed pipe 42 is communicated with the insides of the outlet pipes 43, the connecting pipe 41 is connected between the fixed pipe 42 and the inlet pipe 2, the connecting pipe 41 is communicated with the air bag 46 and the inside of the fixed pipe 42, the pressing rod 44 fixed outside the motor main shaft 31 continuously presses the pressing plate 45 while the motor main shaft 31 rotates, and the pressing plate 45 is in sliding connection with the inlet pipe 2, so that the pressing plate 45 continuously presses the air bag 46, the inside of the air bag 46 can be inflated, and the pressing plate 45 and the inlet pipe 2 are clamped by the elastic force of the first spring 47, the fast reset of the air bag 46 and the pressing plate 45 can be assisted, the air bag 46 can be ensured to work all the time, the gas generated in the air bag 46 can enter the plurality of air outlet pipes 43 through the connecting pipe 41 and the fixing pipe 42, and then flows into the feeding pipe 2 from the plurality of air outlet pipes 43 forming an included angle of 45 degrees with the feeding pipe 2, so that the blowing work can be carried out on the pulverized coal, the pulverized coal enters the combustion furnace 1 in a spraying state, and the better combustion rate is achieved.

When in use, firstly, the motor fixed on the feeding pipe 2 is electrically connected with an external power supply, the motor can drive the motor main shaft 31 to normally rotate, then two flange pipes on the feeding pipe 2 are connected with an external coal feeding pipe, so that coal dust blocks can enter the feeding pipe 2, then various pipelines on the combustion furnace are connected, after the preparation work of the combustion furnace is finished, the combustion furnace is combusted, when the motor main shaft 31 rotates, the connecting plate 32 is driven to rotate by the motor main shaft 31 in the rotating process, hardened coal dust blocks can be crushed, the grinding plate 33 with a circular cross section is fixed at one end of the connecting plate 32, which is far away from the motor main shaft 31, so that the contact area between the connecting plate 32 and the coal dust blocks can be increased, therefore, a better crushing effect can be achieved, and the crushing teeth 34 arranged on the rolling plate 33 can further achieve the better crushing effect; the motor spindle 31 can drive the fixed column 53 to continuously extrude the 51 filter screen while rotating, the filter screen 51 is rotatably connected with the feeding pipe 2 through the rotating shaft 52, the second spring 54 is connected between the filter screen 51 and the feeding pipe 2, and the filter screen 51 can continuously vibrate under the continuous extrusion of the fixed column 53 through the matching use of the rotating shaft 52 and the second spring 54, so that the filter screen 51 can be prevented from being blocked, and the distance between the filter screen 51 and the crushing teeth 34 is continuously changed in the continuous vibration process, so that the crushing teeth 34 can achieve a better crushing effect; and when the motor main shaft 31 rotates, the pressing rod 44 fixed outside the motor main shaft 31 can continuously press the pressing plate 45, because the pressing plate 45 is slidably connected with the feeding pipe 2, the pressing plate 45 can continuously press the air bag 46, so that the interior of the air bag 46 can be inflated, and through the elastic action of the first spring 47 clamped between the pressing plate 45 and the feeding pipe 2, the air bag 46 and the pressing plate 45 can be helped to be rapidly reset, so that the air bag 46 can always work, gas generated inside the air bag 46 can enter the interiors of the air outlet pipes 43 through the connecting pipe 41 and the fixing pipe 42, and then flows into the interior of the feeding pipe 2 from the air outlet pipes 43 forming 45-degree included angles with the feeding pipe 2, so that the air blowing work can be performed, the pulverized coal is sprayed into the combustion furnace 1, so that a better combustion rate is achieved.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An energy-conserving combustion system of industrial boiler which characterized in that: the pulverized coal heat exchanger comprises a combustion furnace (1), a feeding pipe (2), a crushing structure (3), a coal injection structure (4) and an anti-blocking structure (5), wherein the feeding pipe (2) used for connecting an external coal feeding pipe is fixed at the top end of the combustion furnace (1) for combusting pulverized coal and exchanging heat; the inside of the feeding pipe (2) is connected with the crushing structure (3) for crushing the agglomerated coal dust, and the inside of the feeding pipe (2) is connected with the coal injection structure (4) for blowing and ejecting the coal dust crushed by the crushing structure (3); the anti-blocking structure (5) for preventing pulverized coal from blocking the feeding pipe (2) is connected inside the feeding pipe (2);

the crushing structure (3) comprises a motor main shaft (31), a connecting plate (32), a rolling plate (33) and crushing teeth (34), the motor main shaft (31) is rotatably connected inside the feeding pipe (2), the outer part of the motor main shaft (31) is provided with the connecting plate (32) with four cuboid structures in an annular array distribution manner, the connecting plate (32) deviates from one end of the motor main shaft (31) and is fixed with the rolling plate (33), the length of the rolling plate (33) is the same as that of the connecting plate (32), the cross section of the rolling plate (33) is of a circular structure, the crushing teeth (34) are arranged outside the rolling plate (33), each rolling plate (33) is provided with a plurality of the crushing teeth (34), and the crushing teeth (34) are distributed outside the rolling plate (33) in an annular array manner, the section of the crushing tooth (34) is of a triangular structure;

prevent blockking up structure (5) and include filter screen (51), pivot (52), fixed column (53) and second spring (54), filter screen (51) are located the inside of inlet pipe (2), just filter screen (51) are passed through pivot (52) with inlet pipe (2) rotate to be connected, filter screen (51) with the turned angle of inlet pipe (2) is 0-5, just the central cross-section of filter screen (51) is the semiannular structure, the external fixation cylinder structure of motor spindle (31) fixed column (53), just fixed column (53) deviate from the one end of motor spindle (31) is the arc structure, the bottom of filter screen (51) with connect between inlet pipe (2) second spring (54), the central point of motor spindle (31) arrives the distance of smashing the outermost end of tooth (34) is less than motor spindle (31) arrive the distance of filter screen (51) (ii) a

Coal injection structure (4) is including connecting pipe (41), fixed pipe (42), outlet duct (43), extrusion stem (44), clamp plate (45), gasbag (46) and first spring (47), the cuboid structure clamp plate (45) sliding connection in the inside of inlet pipe (2), clamp plate (45) with connect between inlet pipe (2) gasbag (46), just clamp plate (45) with centre gripping between inlet pipe (2) first spring (47), just first spring (47) with be parallel relation between gasbag (46), the externally fixed cylinder structure of motor spindle (31) extrusion stem (44), just extrusion stem (44) deviate from the one end of motor spindle (31) is the arc structure, the external fixation of inlet pipe (2) has outlet duct (43), outlet duct (43) are equipped with a plurality ofly, it is a plurality of outlet duct (43) is linear distribution, and is a plurality of outlet duct (43) all with inlet pipe (2) are 45 contained angles, and are a plurality of the inside of outlet duct (43) all with the inside of inlet pipe (2) communicates with each other, and is a plurality of outlet duct (43) deviates from the one end of inlet pipe (2) is fixed with fixed pipe (42), just the inside of fixed pipe (42) all with a plurality of the inside of outlet duct (43) communicates with each other, fixed pipe (42) with be connected with between inlet pipe (2) connecting pipe (41), just connecting pipe (41) with gasbag (46) with the inside of fixed pipe (42) all communicates with each other.