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Boiler scale thickness monitoring device and method

A technology of thickness monitoring and boiler scale, which is applied in the boiler field, can solve problems such as potential safety hazards, explosions, boiler scale monitoring, etc., and achieve the effects of easy maintenance and replacement, high measurement accuracy, and simple installation

Pending Publication Date: 2020-07-03
GUANGDONG INST OF SPECIAL EQUIP INSPECTION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water in the boiler is continuously concentrated due to various solid dissolved substances in the water during the evaporation process. When the highest solubility of some substances is reached, these solids will crystallize and strongly adhere to the metal wall surface (metal heating surface) in the boiler. These The solid matter attached to the metal wall is called scale. Since the thermal conductivity of scale is much smaller than that of the boiler metal (heating surface), the heat released by the boiler heating surface after absorbing fuel and burning will be greatly reduced, and the thermal efficiency of the boiler will be reduced.
In addition, after the boiler is scaled, it will form corrosion under the scale, reduce the metal thickness of the boiler's pressure parts, and cause safety hazards. In extreme cases, the boiler may leak and explode, seriously damaging people's lives and property safety
[0003] In order to prevent boiler scaling, there are many effective methods such as removing scale-prone solids from the water entering the boiler and adding medicine to the boiler to remove scale. However, due to the failure of water treatment equipment and the technical level of boiler operators Limited, scale formation on industrial steam boilers is still very serious. At present, there is no relevant instrument and equipment to monitor the thickness of boiler scale. We can only open the inspection hole cover of the boiler after production is shut down for manual observation. When the scale exceeds a certain thickness take appropriate measures to clean up

Method used

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  • Boiler scale thickness monitoring device and method
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  • Boiler scale thickness monitoring device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Such as figure 1 As shown, the boiler scale monitoring device includes a temperature sensor, a descaling device and a control device. The descaling device is installed inside the boiler to remove the scale at a certain position in the boiler. The descaling area should be slightly larger than the wall thickness of the boiler at this position. A furnace is arranged inside the boiler, and the boiler wall is divided into an inner wall and an outer wall. The temperature sensor is installed on the outer wall of the boiler, including a first temperature sensor and a second temperature sensor. The first temperature sensor is installed on the outer wall corresponding to the descaling position of the descaling device, and the second temperature sensor is installed on the outer wall near the descaling position. on the wall. The second temperature sensor should be separated from the first temperature sensor by a certain distance to ensure that the scale in the boiler correspondin...

Embodiment 2

[0053] Such as Figure 8-9 As shown, the descaling device of this embodiment includes a water supply pipe, a turbine device and a cleaning device. The turbine device is installed on the water supply pipe, and the cleaning device is installed on the turbine device. The turbine device in this embodiment includes turbine blades, a transmission shaft and a driven shaft. The turbine blades are straight blades, one end of the transmission shaft is connected with the turbine blades, and the other end is equipped with gears. A gear is installed at one end of the driven shaft, and the gear is vertically driven with the gear on the drive shaft. The other end of the driven shaft is equipped with a cleaning device. The cleaning device in this embodiment is the same as that in Embodiment 1, and will not be repeated here. In order to ensure the stable installation of the turbine device on the water supply pipe, a pair of U-shaped bolts are set on the water supply pipe, and a bottom plate...

Embodiment 3

[0056] Such as Figure 10-11 As shown, the descaling device of this embodiment includes a water supply pipe, a turbine device and a cleaning device. The turbine device includes turbine blades, a drive shaft and a driven shaft. The turbine blades are installed inside the water supply pipe, and the blades are straight blades. In order to install the turbine blades into the water supply pipe, it is necessary to modify the original water supply pipe of the boiler to form a cavity capable of accommodating the turbine blades. When water enters the water supply pipe, the water flow directly washes the turbine blades and drives the turbine blades to rotate. The transmission shaft passes through the water supply pipe and is connected with the first bearing arranged on the pipe wall of the water supply pipe. The transmission shaft is vertically connected with the driven shaft and driven by gears. Two third bearing plates are welded on the wall surface of the outer pipe of the water ...

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Abstract

The invention discloses a boiler scale thickness monitoring device and method, and the device comprises a temperature sensor, a descaling device and a control device, and the descaling device is installed in a boiler and is used for removing scale at a certain position in the boiler. The temperature sensors are installed on the outer wall face of the boiler and comprise the first temperature sensor and the second temperature sensor, the first temperature sensor is installed on the outer wall face corresponding to the descaling position of the descaling device, and the second temperature sensoris installed on the outer wall face near the descaling position. The control device is connected with the temperature sensors and used for receiving temperature measurement signals of the first temperature sensor and the second temperature sensor and obtaining the thickness of incrustation in the boiler corresponding to the second temperature sensor through formula calculation by means of the temperature value (difference value) of the two measurement points. According to the scale thickness monitoring device, the boiler metal outer wall temperature values of the descaling point and the non-descaling point are collected at the same time, and the scale thickness in the boiler is calculated. The invention belongs to the technical field of boilers.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a boiler scale thickness monitoring device and method. Background technique [0002] A steam boiler is a kind of power equipment that turns coal, oil, natural gas and other energy sources into high-temperature and high-pressure water steam. The main working principle of the steam boiler is to heat water into high-temperature and high-pressure steam, and then transport it to places that need high-temperature and high-pressure steam by pipelines. . The water in the boiler is continuously concentrated due to various solid dissolved substances in the water during the evaporation process. When the highest solubility of some substances is reached, these solids will crystallize and strongly adhere to the metal wall surface (metal heating surface) in the boiler. These The solid matter attached to the metal wall is called scale. Since the thermal conductivity of scale is much smaller tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/08B08B9/087
CPCB08B9/087G01B21/085
Inventor 洪湖瞿全炎童子权胡雪莲
Owner GUANGDONG INST OF SPECIAL EQUIP INSPECTION
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