CN110375294A - A kind of boiler return feeder - Google Patents

Abstract

The invention discloses a boiler returner, which comprises a cone, a vertical pipe, a horizontal pipe and a material return inclined pipe. The cone is fixed on the top of the vertical pipe, and the side surface of the bottom end of the vertical pipe is fixedly connected with one end of the horizontal pipe. The other end of the pipe is fixed with a return material inclined pipe, a cone air cannon is fixed horizontally inserted on the side of the cone, a riser air cannon is fixed on the side of the riser, and a horizontal air cannon is fixed on the top of the horizontal pipe. The inclined tube air cannon is fixedly inserted on the side of the return inclined tube, the inner bottom end of the horizontal tube is fixed with a mounting frame, and the mounting frame is mounted with a heating wire. The invention solves the problem that the traditional boiler returner is easy to slag and ash by arranging a cone air cannon, a vertical air cannon, a horizontal air cannon, an inclined tube air cannon, a pressure gauge, a flow meter, a control valve and a second air duct. Adhesion in the returner, blocking the returner and causing the boiler to go out.

Description

A boiler return feeder

technical field

The invention relates to the technical field of return feeders, in particular to a boiler return feeder.

Background technique

Furfural residues are biomass wastes produced by hydrolysis of biomass substances such as corn cob, corn stalk, rice husks, cottonseed husks and agricultural and sideline products processing waste to produce furfural. When the slag is burned, it has the following disadvantages when it is returned to the boiler through the return feeder:

1. The furfural slag of boiler fuel is relatively sticky, and it is easy to stick in the returner, blocking the returner and causing the boiler to go out;

2. The return air of the boiler return system is the average supply of air from the two branch pipes, without considering the difference of the location, and the return air volume has not been reasonably distributed;

3. The return pipe of the return feeder has a small slope, and the furfural slag is easy to stick here, but the failure to deal with it in time leads to the suspension of the return material and the flameout of the boiler, and the frequency of blockage here accounts for 56.6% of the total frequency;

4. After the furfural residue is stuck and blocked, it is difficult to clean and handle, and it takes 1-2 days to resume production.

The boiler is frequently fired due to the clogging of the returner, which cannot guarantee long-term stable operation, increases the diesel consumption, and increases the production cost by about 180,000 per month. Therefore, the present invention designs a boiler returner to solve the above problems.

SUMMARY OF THE INVENTION

(1) Technical problems solved

Aiming at the deficiencies of the prior art, the present invention provides a boiler returner, which solves the problem that the slag ash of the traditional boiler returner is easy to stick in the returner, and the boiler is extinguished due to clogging of the returner.

(2) Technical solutions

In order to achieve the above purpose, the present invention provides the following technical solutions: a boiler returner, comprising a cone, a riser, a horizontal pipe and a return material inclined pipe, the cone is fixed on the top of the riser, and the bottom side of the riser is connected to the One end of the horizontal pipe is fixedly connected, the bottom of the other end of the horizontal pipe is fixed with a return material inclined pipe, a cone air cannon is fixed horizontally inserted on the side of the cone, and a riser air cannon is fixedly inserted on the side of the riser. A horizontal air cannon is fixedly inserted at the top, an inclined tube air cannon is fixedly inserted on the side of the return inclined tube, a mounting bracket is fixed at the inner bottom end of the horizontal tube, a heating wire is installed on the mounting bracket, and a first The branch air duct is provided with a branch pressure gauge, a flow meter and a control valve respectively. The first air duct is fixedly connected to the main air duct through a three-way connection. The pipe is fixedly connected with the air outlet of the return fan.

Preferably, the middle part of the side surface of the main air duct is communicated with one end of the second air duct, the other end of the second air duct is inserted into the middle part of the return material inclined pipe, and the second air duct is also provided with a control valve.

Preferably, there are two first air ducts, the two first air ducts are symmetrically arranged on both sides of the main air duct, and the first air duct on the left side is provided with a lower ash pipe, and the lower ash duct is also arranged on the lower ash pipe. A control valve is provided.

Preferably, a visual lens is provided on the side surface of the middle part of the material return inclined tube.

Preferably, there are seven cone air cannons, the seven cone air cannons are arranged in two layers, the upper layer is arranged with four, and the lower layer is arranged with three, and the upper layer cone air cannons and the lower layer cone air cannons are arranged crosswise.

Preferably, there are four standpipe air cannons, the four standpipe air cannons are arranged on the side of the standpipe at equal intervals, and the upper three standpipe air cannons are arranged obliquely downward, and the lowermost standpipe air cannon is horizontally arranged.

Preferably, there are two horizontal air cannons, and the two horizontal air cannons are vertically inserted into the horizontal pipe.

(3) Beneficial effects

The invention provides a boiler returner, which has the following beneficial effects:

(1) In the present invention, by setting cone air cannons, vertical air cannons, horizontal air cannons and inclined tube air cannons, and by adding air cannons in different parts of the return system, the furfural slag is burned in the return device to avoid temperature reduction. and adhesion.

(2) In the present invention, by setting up a second air duct, the transport of primary air is increased in the furfural slag return sloping pipe, providing more oxygen to the fuel, and at the same time accelerating the circulation speed of the fuel ash, reducing the time of contacting the inner wall of the pipe, and reducing the amount of ash. adhesion.

(3) In the present invention, by setting the first air pipe, the pressure gauge, the flow meter and the control valve, by controlling the air flow pressure of the returning material, the speed of the returning ash is controlled, and the adhesion inside the returning device is reduced.

Description of drawings

Fig. 1 is the front view of the present invention;

Fig. 2 is the front sectional view of the present invention;

Figure 3 is a top view of the cone of the reverter of the present invention.

The reference signs in the figure are: 1, cone; 2, riser; 3, horizontal pipe; 4, inclined pipe for return material; 5, cone air cannon; 6, riser air cannon; , inclined tube air gun; 9, heating wire; 10, mounting frame; 11, the first air pipe; 12, pressure gauge; 13, flow meter; 14, control valve; 15, main air pipe; 16, total pressure Table; 17, material return fan; 18, second air duct; 19, visual lens; 20, lower ash pipe.

Detailed ways

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. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in Figures 1-3, the present invention provides a technical solution: a boiler returner, comprising a cone 1, a riser 2, a horizontal pipe 3 and an inclined return pipe 4, and the cone 1 is fixed on the riser 2 The top of the vertical pipe 2 is fixedly connected with one end of the horizontal pipe 3, the bottom of the other end of the horizontal pipe 3 is fixed with a return material inclined pipe 4, and the middle side of the return material inclined pipe 4 is provided with a visual lens 19, The addition of the visual lens 19 can observe the bonding of the return material inclined pipe 4 in time, and the washing time of the return material can be known according to the ash return speed. On the side of the cone 1, a cone air cannon 5 and a cone air cannon 5 are horizontally fixed and inserted. There are seven, the seven cone air cannons 5 are arranged in two layers, the upper layer is provided with four, and the lower layer is provided with three, and the upper layer cone air cannon 5 and the lower layer cone air cannon 5 are arranged crosswise, through the cone 1 Dispose of two layers and add seven cone air cannons 5, increase the inlet air volume of the returner, assist the burning of furfural slag in the returner, and reduce adhesion. The tube air cannons 6 are provided with four, and the four riser air cannons 6 are arranged on the side of the riser 2 at equal intervals, and the three upper riser air cannons 6 are arranged inclined downward, and the lowermost riser air cannons 6 are arranged horizontally. , by adding four standpipe air cannons 6 at the standpipe 2, to ensure the air volume of the standpipe part of the returner, agitate the inner wall of the returner, increase vibration and reduce the attachment of furfural slag in the three-dimensional part, the top of the horizontal pipe 3 is fixedly inserted with a Horizontal air cannon 7, there are two horizontal air cannons 7, the two horizontal air cannons 7 are vertically inserted into the horizontal pipe 3, and by adding two horizontal air cannons 7 at the horizontal pipe 3, the furfural residue at the baffle is promoted and accelerated. The flow of ash can avoid the accumulation and adhesion of ash at the baffle. The inclined tube air cannon 8 is fixedly inserted on the side of the return inclined tube 4. By adding the inclined tube air cannon 8 at the return inclined tube 4, the furfural ash can be avoided. Bonding at the material return inclined pipe 4, a mounting frame 10 is fixed at the inner bottom end of the horizontal pipe 3, the heating wire 9 is mounted on the mounting frame 10, and a first air duct 11 is arranged below the mounting frame 10. The air duct 11 is respectively provided with a pressure gauge 12, a flow meter 13 and a control valve 14. The control valve 14 adopts an electric regulating valve. The first air duct 11 is fixedly connected to the main air duct 15 through a A total pressure gauge 16 is provided, the main air duct 15 is fixedly connected with the air outlet of the return fan 17, and there are two first air ducts 11, and the two first air ducts 11 are symmetrically arranged on two sides of the main air duct 15. The first air duct 11 on the left side is provided with a lower ash pipe 20, and the lower ash pipe 20 is also provided with a control valve 14. The other end of the second air pipe 18 is inserted into the middle of the material return inclined pipe 4 , and the second air pipe 18 is also provided with a control valve 14 .

Working principle: by adding seven cone air cannons 5 in two layers at the cone 1, increasing the inlet air volume of the returner, assisting the combustion of the furfural slag in the returner, reducing the adhesion, by adding four air cannons at the standpipe 2 A standpipe air cannon 6 ensures the air volume of the standpipe part of the reverter, agitates the inner wall of the reverter, increases vibration and reduces the attachment of furfural slag to the three-dimensional part, and by adding two horizontal air cannons 7 at the horizontal pipe 3, promotes and accelerates The flow of furfural slag ash at the baffle avoids the accumulation and adhesion of ash at the baffle. By adding an inclined tube air gun 8 at the return inclined pipe 4, the adhesion of furfural slag ash at the return inclined pipe 4 is avoided. Air cannons are added in different parts of the return system to make the furfural residue burn in the return device to avoid the temperature drop and adhesion. By adding the control valve 14, flow meter 13 and The branch pressure gauge 12 and the control valve 14 are electric control valves, the branch pressure gauge 12 and the flow meter 13 are displayed remotely, and the real-time parameters are directly displayed in the central control room. The pressure ratio fluctuates between 1:1.5-1:2. By controlling the air pressure, the flow speed of the ash in the returner is driven to reduce the cohesiveness of the ash. By setting the second air duct 18 and the visual lens 19, the The ash return speed and circulation speed of furfural slag ash at the 4 places of the return inclined pipe can avoid the adhesion due to the drop of the ash return speed due to insufficient slope. Adding a visual lens 19 can observe the adhesion of the return inclined pipe 4 in time. Speed Know when the refeeder flushes.

To sum up, the present invention provides a cone air cannon 5, a riser air cannon 6, a horizontal air cannon 7, an inclined tube air cannon 8, a pressure gauge 12, a flow meter 13, a control valve 14 and a second air duct 18. Solve the problem that the slag ash of the traditional boiler returner is easy to stick in the returner, and the clogging of the returner causes the boiler to go out.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

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

Claims (7)

1. A boiler returner, comprising a cone (1), a riser (2), a horizontal pipe (3) and a return material inclined pipe (4), characterized in that: the cone (1) is fixed on the riser ( 2) at the top, the bottom side of the riser (2) is fixedly connected with one end of the horizontal pipe (3), and the bottom of the other end of the horizontal pipe (3) is fixed with a return material inclined pipe (4). A cone air cannon (5) is fixed and inserted horizontally on the side, a riser air cannon (6) is fixedly inserted on the side of the riser (2), and a horizontal air cannon (7) is fixedly inserted on the top of the horizontal pipe (3). The inclined tube air cannon (8) is fixedly inserted on the side of the return inclined tube (4), the inner bottom end of the horizontal tube (3) is fixed with a mounting bracket (10), and the mounting bracket (10) is mounted with a heating wire (9). ), a first air duct (11) is arranged below the mounting frame (10), and a pressure gauge (12), a flow meter (13) and a control valve (14) are respectively arranged on the first air duct (11). , the first air duct (11) is fixedly connected with the main air duct (15) through the tee, the main air duct (15) is provided with a total pressure gauge (16), the main air duct (15) and the return fan (17) ) of the air outlet fixed connection. 2 . The boiler feeder according to claim 1 , wherein the middle part of the side surface of the main air duct ( 15 ) is communicated with one end of the second air duct ( 18 ), and the second air duct ( 18 ). ) is inserted into the middle of the material return inclined pipe (4), and a control valve (14) is also provided on the second air pipe (18). 3. The boiler feeder according to claim 1, characterized in that: there are two first air ducts (11), and the two first air ducts (11) are symmetrically arranged on the main air duct (11). 15), and a lower ash pipe (20) is arranged on the first air duct (11) on the left side, and a control valve (14) is also arranged on the lower ash pipe (20). 4. The boiler feeder according to claim 1, characterized in that: a visual lens (19) is provided on the side surface of the middle part of the feeder feed inclined pipe (4). 5. A boiler refeeder according to claim 1, characterized in that: seven cone air cannons (5) are provided, the seven cone air cannons (5) are provided in two layers, and the upper layer is provided with four There are three in the lower layer, and the upper-layer cone air cannons (5) and the lower-layer cone air cannons (5) are arranged in a cross. 6. A boiler feeder according to claim 1, characterized in that: there are four standpipe air cannons (6), and the four standpipe air cannons (6) are arranged at equal intervals on the standpipe (2) and the three upper riser air cannons (6) are arranged inclined downward, and the lowermost riser air cannon (6) is arranged horizontally. 7 . The boiler feeder according to claim 1 , wherein two horizontal air cannons ( 7 ) are provided, and the two horizontal air cannons ( 7 ) are vertically inserted into the horizontal pipe ( 3 ). 8 .