CN217006224U

CN217006224U - Low-temperature economizer leakage detection device for electric dust collector

Info

Publication number: CN217006224U
Application number: CN202220926347.9U
Authority: CN
Inventors: 赵红文; 徐浩; 宫平; 肖永健; 金瑞; 张东; 杨永尚; 王俊杰; 高欢; 李宝; 郑有程; 薄学良; 何涛
Original assignee: Huadian Inner Mongolia Energy Co ltd Tumote Power Generation Branch
Current assignee: Huadian Inner Mongolia Energy Co ltd Tumote Power Generation Branch
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2022-07-19
Anticipated expiration: 2032-04-20

Abstract

The utility model discloses a low-temperature coal economizer leakage detecting device for an electric dust collector, which comprises a bracket, wherein the top end of the bracket is provided with an electric dust collector body, one end of the top of the electric dust collector body is provided with an inlet flue, the other end of the top of the electric dust collector body is provided with an outlet flue, a low-temperature coal economizer is arranged in the inlet flue, and the outer side wall of the inlet flue is provided with a coal economizer detecting mechanism; the bottom end of the electric dust collector body is provided with a plurality of ash hoppers, the bottom ends of the ash hoppers are provided with bin pumps, and a detection alarm module is arranged between the bin pumps and the discharge ports of the ash hoppers and faces the inlet flue; the middle part of the bracket in the vertical direction is provided with a reinforcing rod. The utility model can find the leakage problem of the low-temperature economizer in time, can not cause the blockage of the ash bucket or the blockage of the ash conveying system, verifies the timeliness and the accuracy of temperature measurement for many times and realizes the function of automatically judging and detecting leakage.

Description

Low-temperature economizer leakage detection device for electric dust collector

Technical Field

The utility model relates to the field of electric precipitators, in particular to a low-temperature economizer leakage detection device for an electric precipitator.

Background

The low-temperature electric dust remover is the main stream equipment with ultra-low emission in a power plant, is the combination of a low-temperature coal economizer and electric dust removal, and the low-temperature coal economizer is generally arranged in an inlet flue of the electric dust removal.

The flue gas before the electric dust collector contains a large amount of dust, and the dust can abrade a coal economizer pipeline when the electric dust collector runs for a long time, so that water in the coal economizer leaks into the flue gas and flows into an electric field ash bucket of the electric dust collector along a flue. If leakage cannot be found in time, a large amount of water enters the ash bucket of the electric dust collector, so that ash in the ash bucket is hardened into blocks or becomes sludge, and the fault of an ash conveying system is caused.

The originally designed low-temperature economizer leakage detection device of an electric dust remover manufacturer has poor detection effect. Because water in the low-humidity economizer leaks to the electric dust and ash bucket for at least four times, ash in the ash bucket is formed into wet blocks to block an ash conveying pipeline and an ash warehouse, and only the ash can be discharged from an opening of the ash bucket in an emergency.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides the low-temperature economizer leakage detecting device for the electric dust collector, which has the advantages of not causing the blockage of an ash bucket or an ash conveying system and realizing the function of automatically judging the leakage detection, thereby solving the problem that the ash conveying pipeline and an ash warehouse are blocked due to the fact that wet blocks are formed in the ash bucket of the existing electric dust collector.

(II) technical scheme

In order to realize the advantages of not causing the blockage of an ash hopper or an ash conveying system and realizing the function of automatically judging and detecting leakage, the utility model adopts the following specific technical scheme:

a low-temperature economizer leakage detecting device for an electric dust collector comprises a support, wherein an electric dust collector body is arranged at the top end of the support, an inlet flue is formed in one end of the top of the electric dust collector body, an outlet flue is formed in the other end of the top of the electric dust collector body, a low-temperature economizer is arranged in the inlet flue, and an economizer detecting mechanism is arranged on the outer side wall of the inlet flue; the bottom of electrostatic precipitator body is provided with a plurality of ash buckets, and the bottom of ash bucket is provided with the storehouse pump, just is provided with detection alarm module towards entry flue position between the blanking mouth of storehouse pump and ash bucket, and the support is provided with the stiffener at the middle part of vertical direction, and the quantity of stiffener is a set of at least.

Furthermore, in order to detect the temperature around the low-temperature economizer and further adjust the water inlet speed according to the temperature around the low-temperature economizer, so that the heat in the flue gas can be exchanged more efficiently, the economizer detection mechanism comprises a first shell arranged on the outer side wall of the inlet flue, a screw rod is transversely arranged in the middle of the inside of the first shell, guide rods are arranged at the upper end and the lower end of the screw rod, and a nut block is sleeved on the outer side of the screw rod; the upper end and the lower end of the nut block are connected with the guide rod through connecting blocks, and the connecting blocks are in sliding fit with the guide rod; a non-contact infrared temperature measuring sensor is arranged at the middle part of the nut block and at one end close to the inlet flue; the economizer detection mechanism further comprises a motor arranged on one side of the shell, and an output shaft of the motor is connected with the screw rod.

Furthermore, in order to protect the safety of the motor in use and prevent the motor from being damaged to influence the service life of the economizer detection mechanism, a second shell is arranged on the outer side of the motor and at the end part of the first shell, and a shell cover is arranged at one end, far away from the first shell, of the second shell.

Further, for the control nut piece that can be automatic removes about, and then everywhere temperature around the measurement low temperature economizer that can be more comprehensive accurate, and then avoid appearing measurement error, all be provided with contact switch on the inside both ends lateral wall of casing one, and contact switch is located the middle part of nut piece in vertical direction.

Furthermore, in order to ensure that the non-contact infrared temperature measuring sensor is stably and fixedly connected with the nut block, the non-contact infrared temperature measuring sensor is in threaded connection with the nut block.

(III) advantageous effects

Compared with the prior art, the utility model provides the low-temperature economizer leakage detecting device for the electric dust collector, which has the following beneficial effects:

(1) the utility model can find the leakage problem of the low-temperature economizer in time, can not cause the blockage of the ash hopper or the blockage of the ash conveying system, verifies the timeliness and the accuracy of temperature measurement for many times and realizes the function of automatically judging leakage detection.

(2) Through setting up economizer detection mechanism to can detect the temperature around the low temperature economizer, and then can be according to the temperature around the low temperature economizer, adjust the speed of intaking, and then the heat in the exchange flue gas that can be more efficient.

(3) Through setting up motor, lead screw, contact switch etc to control nut piece that can be automatic removes, and then everywhere temperature around the measurement low temperature economizer that can be more comprehensive accurate, and then avoids appearing measuring error.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments 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 it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is one of schematic perspective views of a low-temperature economizer leak detection apparatus for an electric precipitator according to an embodiment of the present invention;

FIG. 2 is a second schematic perspective view of a leak detection device for a low-temperature economizer of an electric dust collector according to an embodiment of the utility model;

FIG. 3 is a front view of a low temperature economizer leak detection apparatus for an electric precipitator in accordance with an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 2 at A;

FIG. 5 is a schematic structural diagram of an economizer detection mechanism in the low-temperature economizer leakage detecting device for the electric dust collector according to the embodiment of the utility model;

fig. 6 is a front view of fig. 5.

In the figure:

1. a support; 2. an electric dust collector body; 3. an inlet flue; 4. an outlet flue; 5. a low-temperature economizer; 6. an economizer detection mechanism; 601. a first shell; 602. a screw rod; 603. a guide bar; 604. a nut block; 605. connecting blocks; 606. a non-contact infrared temperature measuring sensor; 607. a motor; 608. a second shell; 609. a shell cover; 610. a contact switch; 7. an ash hopper; 8. a bin pump; 9. a detection alarm module; 10. a reinforcing rod.

Detailed Description

For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable one skilled in the art to understand the embodiments and advantages of the disclosure for reference and without scale, wherein elements are not shown in the drawings and like reference numerals are used to refer to like elements generally.

According to an embodiment of the utility model, a low-temperature economizer leakage detecting device for an electric dust collector is provided.

Referring to the drawings and the detailed description, as shown in fig. 1-3, the low-temperature economizer leakage detecting device for the electric dust collector according to the embodiment of the utility model comprises a support 1, wherein an electric dust collector body 2 is arranged at the top end of the support 1, an inlet flue 3 is arranged at one end of the top of the electric dust collector body 2, an outlet flue 4 is arranged at the other end of the top of the electric dust collector body 2, a low-temperature economizer 5 is arranged in the inlet flue 3, and an economizer detecting mechanism 6 is arranged on the outer side wall of the inlet flue 3; the bottom of electrostatic precipitator body 2 is provided with a plurality of ash buckets 7, and the bottom of ash bucket 7 is provided with storehouse pump 8, between the blanking mouth of storehouse pump 8 and ash bucket 7 and towards entry flue 3 position be provided with detection alarm module 9, detect alarm module 9 and can the temperature measurement to lay signal cable, lead the temperature measurement signal to assisting net DCS (power plant owner and assist control system), accomplish the logic and the picture configuration of temperature display, warning on power plant DCS computer. Finally, temperature display and corresponding low-temperature economizer leakage alarm are realized on the picture of an electric dust removal control computer of the power plant centralized control room; 4-8 ash hoppers are generally arranged on the electric dust collector, when the temperature value of one ash hopper is lower than that of the other ash hoppers by about 15 ℃, the possibility of leakage can be judged, a computer is controlled to send out audible and visual alarm, and monitoring personnel inform that the monitoring personnel confirm the leakage on the spot; the support 1 is provided with a reinforcing rod 10 in the middle of the vertical direction, and the number of the reinforcing rods 10 is at least one group.

By means of the scheme, the leakage problem of the low-temperature economizer 5 can be found in time, the ash hopper 7 or the ash conveying system cannot be blocked, the timeliness and the accuracy of temperature measurement are verified for multiple times, and the function of automatic judgment and leakage detection is achieved.

As shown in fig. 4-6, in an embodiment, for the economizer detection mechanism 6, the economizer detection mechanism 6 includes a first housing 601 disposed on an outer side wall of the inlet flue 3, a lead screw 602 is transversely disposed in a middle position inside the first housing 601, guide rods 603 are disposed at upper and lower ends of the lead screw 602, and a nut block 604 is sleeved on an outer side of the lead screw 602; the upper end and the lower end of the nut block 604 are connected with the guide rod 603 through a connecting block 605, and the connecting block 605 is in sliding fit with the guide rod 603; a non-contact infrared temperature measuring sensor 606 (the model can be selected to be GY-614V3) is arranged at the middle part of the nut block 604 and one end close to the inlet flue 3; the economizer detection mechanism 6 further comprises a motor 607 arranged on one side of the first shell 601, and an output shaft of the motor 607 is connected with the screw 602; the non-contact infrared temperature measurement sensor 606 is connected with the nut block 604 in a threaded manner, so that the temperature around the low-temperature economizer 5 can be detected, the water inlet speed can be adjusted according to the temperature around the low-temperature economizer 5, the heat in the flue gas can be exchanged more efficiently, and the angle of the attached drawing of the coal detection mechanism 6 in fig. 5 is the direction from the inlet flue 3 to the coal detection mechanism 6.

The working principle of the economizer detection mechanism 6 is as follows: the motor 607 drives the lead screw 602 to rotate, and the lead screw 602 drives the nut block 604 and the non-contact infrared temperature measuring sensor 606 to move left and right.

As shown in fig. 4, in one embodiment, for the motor 607, a second casing 608 is disposed at an end of the first casing 601 outside the motor 607, and a cover 609 is disposed at an end of the second casing 608 away from the first casing 601, so as to protect the safety of the motor 607 during use and prevent the motor 607 from being damaged and affecting the service life of the economizer detection mechanism 6.

As shown in fig. 5 to 6, in an embodiment, for the first housing 601, the contact switches 610 are disposed on the side walls of the two ends of the inside of the first housing 601, and the contact switches 610 are located in the middle of the nut block 604 in the vertical direction, so that the nut block 604 can be automatically controlled to move left and right, and then the temperature around the low-temperature economizer 5 can be more comprehensively and accurately measured, and further, the occurrence of measurement errors is avoided.

In one embodiment, the wall temperature change of the bin pump 8 below the dust remover is detected by the arranged detection device, so that whether the ash bucket 7 discharges smoothly can be detected, whether a discharging port is blocked can be judged, and the high material of the ash bucket 7 is prevented. If the measuring point is arranged on the bin pump 8, the detection on whether the blanking of the ash bucket 7 is smooth can be realized. When the blanking valve of the bin pump 8 is closed, the wall temperature of the bin pump 8 is generally room temperature, when the blanking valve of the bin pump 8 is opened, hot ash in the ash bucket 7 enters the bin pump 8, and the temperature of the bin pump 8 can rise to more than 60 ℃ (ash temperature). If after the blanking valve of the bin pump 8 is opened, the wall temperature of the bin pump 8 is not increased all the time, which indicates that the ash bucket is not smooth in blanking and has ash blockage, and then the maintenance personnel are informed to process the ash. The ash bucket 7 of the existing power plant for electric precipitation detects whether the ash bucket 7 is high in material level or not by means of an ash bucket material level meter, and long-term practice shows that the accuracy of the material level meter is very poor, so that the ash bucket is frequently high in material level, and the ash bucket 7 is caused to collapse to a serious event. The technology can find the problem of unsmooth blanking in time, and if the blanking is smooth, the ash hopper 7 cannot generate the problem of long-term high material level.

For the convenience of understanding the technical solutions of the present invention, the following detailed description will be made on the working principle or the operation mode of the present invention in the practical process.

In practical application, flue gas enters from the inlet flue 3 and exchanges heat through the low-temperature economizer 5, then the flue gas is blown out from the outlet flue 4, and ash generated in the process sequentially falls into the ash bucket 7 and the bin pump 8. The temperature of each ash bucket is measured through the detection alarm module 9, and if the temperature of one ash bucket 7 is lower than the temperatures of other ash buckets 7 by about 15 ℃, the possibility of leakage is judged. When the flue gas enters the inlet flue 3, the temperature around the inlet flue 3 and the low-temperature economizer 5 is obtained through the non-contact infrared temperature measuring sensor 606, the temperature trend at the position is known, if the temperature rises, the water supply speed is accelerated, otherwise, the reverse is true. When the device is used, the motor 607 is started, the motor 607 drives the screw 602 to rotate, the screw 602 drives the nut block 604 and the non-contact infrared temperature measurement sensor 606 to move left and right, and the non-contact infrared temperature measurement sensor 606 comprehensively and accurately measures the temperature around the low-temperature economizer.

In conclusion, the utility model can find the leakage problem of the low-temperature economizer 5 in time, can not cause the blockage of the ash hopper 7 or the blockage of the ash conveying system, verifies the timeliness and the accuracy of temperature measurement for many times and realizes the function of automatically judging and detecting leakage. Through setting up economizer detection mechanism 6 to can detect the temperature around the low temperature economizer 5, and then can be according to the temperature around the low temperature economizer 5, adjust the speed of intaking, and then can exchange the heat in the flue gas more efficiently. Through setting up motor 607, lead screw 602, contact switch 610 etc to control nut block 604 that can be automatic removes, and then can be more comprehensive accurate measurement low temperature economizer 5 around everywhere temperature, and then avoid appearing measuring error.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a low temperature economizer leak hunting device for electrostatic precipitator, includes support (1), its characterized in that:

an electric dust collector body (2) is arranged at the top end of the support (1), an inlet flue (3) is arranged at one end of the top of the electric dust collector body (2), an outlet flue (4) is arranged at the other end of the top of the electric dust collector body (2), a low-temperature economizer (5) is arranged in the inlet flue (3), and an economizer detection mechanism (6) is arranged on the outer side wall of the inlet flue (3);

the bottom of electrostatic precipitator body (2) is provided with a plurality of ash buckets (7), the bottom of ash bucket (7) is provided with storehouse pump (8), storehouse pump (8) with between the blanking mouth of ash bucket (7) and towards entry flue (3) position is provided with detection alarm module (9).

2. The low-temperature economizer leakage detecting device for the electric dust collector as claimed in claim 1, wherein the economizer detection mechanism (6) comprises a first shell (601) arranged on the outer side wall of the inlet flue (3), a screw rod (602) is transversely arranged at the middle position in the first shell (601), guide rods (603) are arranged at the upper end and the lower end of the screw rod (602), and a nut block (604) is sleeved on the outer side of the screw rod (602);

the upper end and the lower end of the nut block (604) are connected with the guide rod (603) through connecting blocks (605), and the connecting blocks (605) are in sliding fit with the guide rod (603);

and a non-contact infrared temperature measuring sensor (606) is arranged at the middle part of the nut block (604) and at one end close to the inlet flue (3).

3. The low-temperature economizer leakage detecting device for the electric dust collector as claimed in claim 2, wherein the economizer detection mechanism (6) further comprises a motor (607) arranged on one side of the first casing (601), and an output shaft of the motor (607) is connected with the screw rod (602).

4. The low-temperature economizer leakage detecting device for the electric dust collector is characterized in that a second shell (608) is arranged at the end, located outside the motor (607), of the first shell (601), and a shell cover (609) is arranged at the end, away from the first shell (601), of the second shell (608).

5. The low-temperature economizer leakage detecting device for the electric dust collector as claimed in claim 2 or 3, wherein the side walls of two ends of the inside of the first shell (601) are provided with contact switches (610), and the contact switches (610) are vertically positioned in the middle of the nut block (604).

6. The low-temperature economizer leakage detection device for the electric dust collector as claimed in claim 5, wherein the non-contact infrared temperature measurement sensor (606) is connected with the nut block (604) in a threaded manner.

7. The low-temperature economizer leakage detecting device for the electric dust collector is characterized in that the middle of the support (1) in the vertical direction is provided with a reinforcing rod (10), and the number of the reinforcing rods (10) is at least one group.