CN214791033U - Detection mechanism for detecting temperature field and concentration field for boiler - Google Patents

Abstract

The utility model relates to a boiler technical field, and a detection mechanism for boiler with detecting temperature field and concentration field is disclosed, including the boiler, the inside bottom wall fixed mounting of boiler has combustion furnace, the blast pipe is installed to the lateral wall that fires combustion furnace, one section of lateral wall that runs through the boiler of blast pipe is located the external world, the place ahead of boiler is close to left position and is provided with detection mechanism, detection mechanism's inside bottom wall fixed mounting has first burning chamber, detection mechanism's lateral wall is close to the position on the right side and has seted up intercommunication to the inside observation chamber of combustion furnace, observe the intracavity and install two sets of sight glasses, detection mechanism's below is provided with furnace temperature display cabinet, detection mechanism's lateral wall is close to the fixed position on right side and has the combustor. The utility model discloses in, this boiler is with detection temperature field and concentration field's detection mechanism, with its filtration treatment before the water heating, make it can not produce the incrustation scale in detection mechanism, avoided the incrustation scale to influence boiler combustion efficiency's the condition emergence.

Description

Detection mechanism for detecting temperature field and concentration field for boiler

Technical Field

The utility model relates to a boiler technical field especially relates to a detection mechanism in boiler with measuring temperature field and concentration field.

Background

The boiler is an energy conversion device, the energy input to the boiler comprises chemical energy and electric energy in fuel, and the boiler outputs steam, high-temperature water or an organic heat carrier with certain heat energy. The hot water or steam generated in the boiler can directly provide heat energy for industrial production and people life, and can also be converted into mechanical energy through a steam power device, or the mechanical energy is converted into electric energy through a generator.

When an existing boiler detection mechanism in the current market detects a temperature field and a concentration field, the operation conditions of each shift are different, the combustion condition in the boiler cannot be clearly displayed, and clear guidance cannot be provided. Therefore, a detection mechanism for detecting a temperature field and a concentration field for a boiler is provided.

SUMMERY OF THE UTILITY MODEL

The utility model mainly solves the technical problem existing in the prior art and provides a detection mechanism for detecting a temperature field and a concentration field for a boiler.

In order to achieve the above object, the present invention adopts the following technical scheme, a detection mechanism for detecting a temperature field and a concentration field for a boiler, comprising a boiler, wherein the boiler is in a hollow cylinder shape, a combustion furnace is fixedly installed on the inner bottom wall surface of the boiler, the combustion furnace is in a hollow cylinder structure, an exhaust pipe is installed at the position near the upper part on the left side of the side wall of the combustion furnace, a section of the exhaust pipe penetrating through the side wall of the boiler is located at the outside, a detection mechanism is arranged at the position near the left side in front of the boiler, a first combustion chamber is fixedly installed on the inner bottom wall surface of the detection mechanism, an observation chamber communicated to the inside of the combustion furnace is arranged at the position near the right side of the side wall of the detection mechanism, two groups of observation mirrors are installed in the observation chamber, the observation mirrors are in a disc-shaped structure, a furnace temperature display cabinet is arranged below the detection mechanism, the furnace temperature display cabinet is in a cylinder-shaped structure, a combustor is fixedly installed at the position near the right side wall of the detection mechanism, the right side wall intermediate position of combustor is provided with temperature-detecting device, temperature-detecting device is current device, do not do here and describe repeatedly, the gas pipe is installed to the bottom wall intermediate position of combustor, the gas pipe is the pipe of L type structure, the air-feed pipe is installed to the position that the left side wall of combustor is close to the below, the air-feed pipe communicates to the inside in first combustion chamber, the heat pipe is installed to the position that the lateral wall in first combustion chamber is close to the rear, the heat pipe is the tubular structure, and the heat pipe runs through the lateral wall of detection mechanism and the lateral wall of boiler and is linked together with the inside of firing the burning furnace.

The observation mirror and the temperature detection device form a detection mechanism of the whole system, a DCS control system is integrated in the furnace temperature display cabinet, and data detected by the detection mechanism are transmitted to the inside of the DCS control system through the combustion optimization station to be analyzed

Preferably, a steam pipe is fixedly mounted on the top wall surface of the detection mechanism, the steam pipe is a hollow cylinder, an air inlet pipe is fixedly mounted at a position, close to the rear, of the side wall of the steam pipe, the air inlet pipe is of a tubular structure, the air inlet pipe penetrates through the side wall of the boiler and is communicated with the interior of the boiler, a return pipe is fixedly mounted at a position, behind the side wall of the steam pipe, of the return pipe, and the return pipe is of a tubular structure.

Preferably, the return pipe penetrates through a side wall of the boiler to be communicated with the interior of the boiler, the air outlet pipe is installed on the top wall surface of the steam pipe, the water injection port communicated with the interior of the steam pipe is installed at the position, close to the right side, behind the top of the steam pipe, and the water injection port is of a tubular structure.

Preferably, a sealing cover is arranged at the top of the water filling port, the sealing cover is of a cylindrical structure with a round hole at the bottom, the hole formed at the bottom of the sealing cover is matched with the wall surface of the top of the water filling port, a filter screen is fixedly arranged at the middle position in the steam pipe, and the filter screen is of a disc-shaped structure.

Preferably, the inner wall middle position fixed mounting of back flow has solid fixed ring, and solid fixed ring is the piece of half ring type, installs the rotary rod between solid fixed ring's the inside wall, and the rotary rod is the pole of cylinder type, and the lateral wall the place ahead fixed mounting of rotary rod has the closing plate, and the closing plate is the circular shape board.

Advantageous effects

The utility model provides a detection mechanism in temperature field and concentration field is detected with detecting to boiler. The method has the following beneficial effects:

(1) this detection mechanism of boiler with detecting temperature field and concentration field, because install sight glass and temperature-detecting device, can observe the condition of burning in the burning furnace through the sight glass, can know the temperature when burning the burning furnace internal gas burning through temperature-detecting device, sight glass and temperature-detecting device constitute entire system's detection mechanism, the internal integration of furnace temperature display cabinet has DCS control system, the data that detection mechanism detected are through burning optimization station transmission to DCS control system's inside and are analyzed, the effect that makes burning state in the stove monitorable and visual has been reached, improve boiler combustion efficiency, promote about 0.2% of boiler efficiency, improve each load steam temperature of boiler, promote unit efficiency.

(2) This detection mechanism in boiler with detection temperature field and concentration field, water in the steam pipe flows into the boiler from the back flow after the filtration of filter screen, the rethread gas pipe carries the gas in to the combustor, the combustor carries first burning intracavity through the air supply pipe after lighting the gas, the rethread heat pipe carries the gas in the burning furnace from first burning intracavity, the heat that the gas combustion produced heats the water in the boiler to the boiling because the water in the detection mechanism is through filtering, impurity in the water is filtered the back and is reheated and can not produce the incrustation scale, the incrustation scale needs more heat when attached to the inside meeting of detection mechanism, the condition of incrustation scale influence boiler combustion efficiency has been avoided and has taken place.

(3) According to the detection mechanism for detecting the temperature field and the concentration field in the boiler, when steam in the boiler moves leftwards through the return pipe, the steam pushes the sealing plate leftwards to be blocked by the fixing ring, so that the steam cannot reach the inside of the steam pipe from the return pipe, and only water in the steam pipe can flow into the boiler from the return pipe, and the situation that the steam enters the steam pipe from the return pipe is avoided.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a sectional view of the detecting mechanism of the present invention;

FIG. 3 is a sectional view of the boiler of the present invention;

FIG. 4 is an enlarged view of the point A in FIG. 2 according to the present invention;

FIG. 5 is a cross-sectional view of the return pipe of the present invention;

fig. 6 is an overall flowchart of the DCS control system of the present invention;

FIG. 7 is a diagram of the intelligent combustion optimization system of the present invention;

FIG. 8 is a diagram of the intelligent combustion optimization system of the present invention;

FIG. 9 is a temperature variation trend chart of the furnace chamber A/B/C three-layer under the load of 400MW of the unit of the present invention;

FIG. 10 is a comparison graph of the temperature of the furnace chamber, the load of the unit and the coal supply amount;

fig. 11 is the optimization effect diagram of the filtering system of the present invention.

Illustration of the drawings:

the device comprises a detection mechanism 1, a first combustion chamber 2, a hearth temperature display cabinet 3, an observation chamber 4, an observation mirror 5, a burner 6, a temperature detection device 7, a gas pipe 8, an air supply pipe 9, an exhaust pipe 10, a steam pipe 11, an air inlet pipe 12, a return pipe 13, an air outlet pipe 14, a water injection port 15, a sealing cover 16, a filter screen 17, a fixing ring 18, a rotating rod 19, a sealing plate 20, a boiler 21, a combustion furnace 22 and a heat conduction pipe 23.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: as shown in fig. 1-5, a detection mechanism for detecting a temperature field and a concentration field for a boiler comprises a boiler 21, the boiler 21 is hollow cylindrical, a combustion furnace 22 is fixedly installed on the inner bottom wall surface of the boiler 21, the combustion furnace 22 is hollow cylindrical, an exhaust pipe 10 is installed on the left side of the side wall of the combustion furnace 22 near the upper part, a section of the exhaust pipe 10 penetrating through the side wall of the boiler 21 is located outside, a detection mechanism 1 is installed on the front side of the boiler 21 near the left side, a first combustion chamber 2 is fixedly installed on the inner bottom wall surface of the detection mechanism 1, an observation chamber 4 communicated to the inside of the combustion furnace is arranged on the side wall of the detection mechanism 1 near the right side, two groups of observation mirrors 5 are installed in the observation chamber 4, the observation mirrors 5 are disc-shaped structures, a furnace temperature display cabinet 3 is arranged below the detection mechanism 1, the furnace temperature display cabinet 3 is cylindrical, the combustor 6 is fixedly installed at a position, close to the right side, of the side wall of the detection mechanism 1, a temperature detection device 7 is arranged at a middle position of the right side wall of the combustor 6, the temperature detection device 7 is an existing device and is not described herein any more, a gas pipe 8 is installed at a middle position of the bottom wall of the combustor 6, the gas pipe 8 is an L-shaped structure, a gas supply pipe 9 is installed at a position, close to the lower side, of the left side wall of the combustor 6, the gas supply pipe 9 is communicated to the inside of the first combustion chamber 2, a heat conduction pipe 23 is installed at a position, close to the rear side, of the side wall of the first combustion chamber 2, the heat conduction pipe 23 is of a tubular structure, and the heat conduction pipe 23 penetrates through the side wall of the detection mechanism 1 and the side wall of the boiler 21 to be communicated with the inside of the combustion furnace 22.

The top wall surface of the detection mechanism 1 is fixedly provided with a steam pipe 11, the steam pipe 11 is a cylinder with a hollow structure, the position of the side wall of the steam pipe 11 close to the rear is fixedly provided with an air inlet pipe 12, the air inlet pipe 12 is of a tubular structure, the air inlet pipe 12 penetrates through the side wall of the boiler 21 and is communicated with the inside of the boiler 21, the position of the rear part of the side wall of the steam pipe 11 is fixedly provided with a return pipe 13, the return pipe 13 is of a tubular structure, the return pipe 13 penetrates through the side wall of the boiler 21 and is communicated with the inside of the boiler 21, the top wall surface of the steam pipe 11 is provided with an air outlet pipe 14, the position of the rear part of the top of the steam pipe 11 close to the right side is provided with a water filling port 15 communicated with the inside of the steam pipe 11, the water filling port 15 is of a tubular structure, the top of the water filling port 15 is provided with a sealing cover 16, the sealing cover 16 is of a cylindrical structure with a round hole at the bottom, and the hole at the bottom of the sealing cover 16 is matched with the top wall surface of the water filling port 15, a strainer 17 is fixedly mounted at the middle position inside the steam pipe 11, and the strainer 17 is of a disc-shaped structure.

The fixed ring 18 is fixedly installed at the middle position of the inner wall of the return pipe 13, the fixed ring 18 is a semi-circular ring-shaped block, a rotating rod 19 is installed between the inner side walls of the fixed ring 18, the rotating rod 19 is a cylindrical rod, a sealing plate 20 is fixedly installed in front of the side wall of the rotating rod 19, and the sealing plate 20 is a circular plate.

The observation mirror 5 and the temperature detection device 7 form a detection mechanism of the whole system, a DCS control system is integrated in the furnace temperature display cabinet 3, and data detected by the detection mechanism are transmitted to the inside of the DCS control system through the combustion optimization station to be analyzed.

Example 2: as shown in fig. 6-11: when the boiler mentioned in the above scheme is used, intelligent combustion is realized by adopting an intelligent boiler optimization system, and the intelligent combustion comprises the following steps:

and (3) detection layer surface: information is provided for the operation of the boiler by detecting important parameters affecting the combustion of the boiler.

And (3) controlling the layer: the boiler combustion optimization control is realized by adopting an advanced control algorithm, an artificial intelligence technology and a data mining method.

The equipment level: the optimized combustion of the boiler is realized through the optimized design and the modification of equipment such as a combustor, a heating surface and the like.

At present, three technical routes are available for boiler temperature measurement:

(1) the ultrasonic technology is adopted for temperature measurement, and the field application effect is poor due to a plurality of field influence factors and long temperature measurement period;

(2) a boiler temperature measurement technology based on a CCD camera shooting technology is used for two-dimensional or three-dimensional temperature measurement of a boiler, the accuracy and credibility of the temperature measurement are always questioned due to the fact that the two-dimensional or three-dimensional temperature field is calculated, the temperature measurement technology is applied to some power plants, but the effect is not good, and the key is the accuracy, credibility and how to apply the temperature measurement technology.

(3) The infrared technology-based bicolor temperature measurement method is just applied to a power plant, and has the advantages of accurate temperature measurement, simple use and capability of directly accessing temperature measurement parameters into a DCS system to directly display the temperature of a temperature measurement point on an operator display screen because the technology is mature, so that the operating method has important reference value for operation and operation, and is a boiler temperature measurement technology with the most application prospect at present.

Different problems can be solved according to different installation measuring points:

(1) the boiler is low-load and stable in combustion;

(2) coking;

(3) the problem of flame deflection (the problem of large deviation of two sides of the temperature of the superheated steam);

(4) optimizing soot blowing;

(5) combustion is optimized, and unit efficiency is improved;

(6) and reducing nitrogen oxides.

The infrared temperature measuring device is specially used for measuring the temperature of the boiler hearth.

Can be directly arranged on the boiler wall for continuous on-line monitoring.

The temperature measuring range is 400-1650 ℃, and 4-20mA current signals or RS485 communication digital signals are output.

Under this system, this boiler can reach coking control when using, raises the efficiency, guarantees safety, prevents to burn partially, and the prevention is put out a fire, saves the fuel, and the benefit improves, shortens to open and stop the time, the three-dimensional temperature control of furnace, effects such as burning optimization.

Based on the boiler combustion state parameters of the 660MW ultra-supercritical unit, the most main influence factors on NOx emission and exhaust gas temperature in each load section are adopted to establish a layered model of NOx emission and exhaust gas temperature.

Based on the established boiler combustion system layered model, the adjustable operation parameters of the boiler are taken as optimization variables, including coal feeding amount of a coal feeder of each combustion layer, secondary air of each layer, over-fire air and the like, and global optimization is carried out by taking reduction of NOx emission amount and exhaust gas temperature of the boiler as optimization targets.

The utility model discloses a theory of operation:

when the steam boiler is used, the sealing cover 16 is opened, a large amount of water is added into the steam pipe 11 through the water filling port 15, the water in the steam pipe 11 flows into the boiler 21 from the return pipe 13 after being filtered by the filter screen 17, then the gas is conveyed into the combustor 5 through the gas pipe 7, the combustor 5 ignites the gas and then conveys the gas into the first combustion chamber 2 through the gas conveying pipe 9, then the gas is conveyed into the combustion furnace 22 from the first combustion chamber 2 through the heat pipe 23, the water in the boiler 21 is heated to boiling by the heat generated by the combustion of the gas, a large amount of steam generated by the boiling is conveyed into the steam pipe 11 through the gas inlet pipe 12, a part of the steam is conveyed to a required place through the gas outlet pipe 14, a part of the steam is condensed to become liquid water again, the liquid water flows back into the boiler 21 from the return pipe 13 after being filtered by the filter screen 17, and waste gas generated by the combustion can be discharged into the waste gas collecting device through the gas outlet pipe 10.

Because the fixed ring 18, the rotating rod 19 and the sealing plate 20 are installed in the return pipe 13, water formed by liquefying steam in the steam pipe 11 can push the sealing plate 20 to the right after being filtered, the sealing plate 20 can rotate on the rotating rod 19, so that the water can flow back to the boiler 21, and when steam in the boiler 21 moves to the left through the return pipe 13, the steam can be blocked by the fixed ring 18 to the left top of the sealing plate 20, so that the steam cannot reach the steam pipe 11 from the return pipe 13, and only the water in the steam pipe 11 can flow into the boiler 21 from the return pipe 13.

Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above-described embodiments, and many modifications are possible. Any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should be considered as belonging to the protection scope of the present invention.

Claims (6)

1. The utility model provides a detection mechanism of detection temperature field and concentration field for boiler, includes boiler (21), its characterized in that: a combustion furnace (22) is fixedly installed on the inner bottom wall surface of the boiler (21), an exhaust pipe (10) is installed at a position, close to the upper part, on the left side of the side wall of the combustion furnace (22), and a section of the exhaust pipe (10) penetrates through the side wall of the boiler (21) and is located outside;

a detection mechanism (1) is arranged at a position, close to the left side, in front of a boiler (21), a first combustion chamber (2) is fixedly installed on the bottom wall surface inside the detection mechanism (1), an observation chamber (4) is formed in the side wall of the detection mechanism (1), two groups of observation mirrors (5) are installed in the observation chamber (4), a hearth temperature display cabinet (3) is arranged below the detection mechanism (1), a combustor (6) is fixedly installed at a position, close to the right side, of the side wall of the detection mechanism (1), a temperature detection device (7) is arranged at the middle position of the right side wall of the combustor (6), a gas pipe (8) is installed at the middle position of the bottom wall surface of the combustor (6), a gas supply pipe (9) is installed at a position, close to the lower side, of the left side wall of the combustor (6), the gas supply pipe (9) is communicated to the inside of the first combustion chamber (2), a heat conduction pipe (23) is installed at a position, close to the rear side wall of the first combustion chamber (2), the heat conduction pipe (23) penetrates through the side wall of the detection mechanism (1) and the side wall of the boiler (21) and is communicated with the inside of the combustion furnace (22);

the observation mirror (5) and the temperature detection device (7) form a detection mechanism of the whole system, and a DCS control system is integrated in the furnace temperature display cabinet (3).

2. The detecting mechanism for detecting the temperature field and the concentration field of the boiler according to claim 1, wherein: a steam pipe (11) is fixedly mounted on the top wall surface of the detection mechanism (1), an air inlet pipe (12) is fixedly mounted at the position, close to the rear, of the side wall of the steam pipe (11), and the air inlet pipe (12) penetrates through the side wall of the boiler (21) and is communicated with the interior of the boiler (21).

3. The detecting mechanism for detecting the temperature field and the concentration field of the boiler according to claim 2, wherein: the side wall of the steam pipe (11) is fixedly provided with a return pipe (13), and the return pipe (13) penetrates through the side wall of the boiler (21) and is communicated with the interior of the boiler (21).

4. The detecting mechanism for detecting the temperature field and the concentration field of the boiler according to claim 2, wherein: an air outlet pipe (14) is installed on the wall surface of the top of the steam pipe (11), and a water filling port (15) communicated to the interior of the steam pipe (11) is installed at the position, close to the right side, of the rear of the top of the steam pipe (11).

5. The boiler detection temperature field and concentration field detection mechanism according to claim 4, wherein: the top of the water injection port (15) is provided with a sealing cover (16), a hole formed in the bottom of the sealing cover (16) is matched with the top wall surface of the water injection port (15), and a filter screen (17) is fixedly arranged in the middle of the interior of the steam pipe (11).

6. The detecting mechanism for detecting the temperature field and the concentration field of the boiler according to claim 3, wherein: the inner wall middle position fixed mounting of back flow (13) has solid fixed ring (18), installs rotary rod (19) between the inside wall of solid fixed ring (18), and the lateral wall the place ahead fixed mounting of rotary rod (19) has closing plate (20).

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