阅读说明：本技术 一种煤气化炉水冷壁积灰结渣在线监测装置 (Coal gasifier water-cooled wall deposition slagging on-line monitoring device ) 是由 孙富韬 孙海涛 吴佳灵 陈瑞典 武东健 李文峰 刘溢 孟祥军 张晓菲 卢超 王阔 于 2020-11-27 设计创作，主要内容包括：本发明涉及积灰结渣检测技术领域,特别涉及一种水冷壁积灰结渣监测装置。一种煤气化炉水冷壁积灰结渣在线监测装置,包括：多个长度呈等差分布的细长状温度传感器；温度传感器通过固定装置呈阶梯式排列,固定装置镶嵌在水冷壁的内表面,温度传感器探测端至水冷壁内表面的距离由上而下依次递增；温度传感器通过数据线接入计算机,计算机对温度传感器输出数据进行整理,绘制出所有温度传感器测点温度的分布图。本发明可以实现基于间接测量的煤气化炉水冷壁积灰结渣厚度的在线监测,为煤气化炉水冷壁的清洁提供指导,保证煤气化炉的安全运行。(The invention relates to the technical field of dust deposition and slag bonding detection, in particular to a water-cooled wall dust deposition and slag bonding monitoring device. The utility model provides a coal gasifier water-cooled wall deposition slagging scorification on-line monitoring device, includes: a plurality of elongated temperature sensors with the lengths distributed in an equal difference mode; the temperature sensors are arranged in a stepped manner through the fixing device, the fixing device is embedded in the inner surface of the water-cooled wall, and the distance from the detection end of the temperature sensor to the inner surface of the water-cooled wall is gradually increased from top to bottom; the temperature sensors are connected into the computer through data lines, and the computer sorts the output data of the temperature sensors and draws distribution maps of the temperatures of the measuring points of all the temperature sensors. The invention can realize the online monitoring of the ash deposition and slag bonding thickness of the water-cooled wall of the coal gasifier based on indirect measurement, provides guidance for the cleaning of the water-cooled wall of the coal gasifier and ensures the safe operation of the coal gasifier.)

1. The utility model provides a coal gasifier water-cooled wall deposition slagging scorification on-line monitoring device which characterized in that: the method comprises the following steps: more than two slender temperature sensors (1) with the lengths distributed in an equal difference mode;

the temperature sensors (1) are arranged in a stepped mode through fixing devices (2), the fixing devices (2) are embedded in the inner surface of the water-cooled wall (3), and the distance from the detection end of each temperature sensor (1) to the inner surface of the water-cooled wall (3) is sequentially increased from top to bottom;

the temperature sensor (1) is connected to the data processing unit through a data line.

2. The coal gasifier water-cooled wall ash deposition slagging on-line monitoring device of claim 1, characterized in that: the fixing device (2) is made of high-temperature-resistant ceramic materials, and the surface of the fixing device (2) is flush with the inner surface of the water-cooled wall (3).

3. The coal gasifier water-cooled wall ash deposition and slagging on-line monitoring device of claim 1 or 2, characterized in that: the temperature sensors (1) are arranged at equal intervals.

4. The coal gasifier water-cooled wall ash deposition slagging on-line monitoring device of claim 3, characterized in that: the distance between two adjacent temperature sensors (1) is 15 mm.

5. The coal gasifier water-cooled wall ash deposition and slagging on-line monitoring device of claim 1 or 2, characterized in that: the temperature sensor (1) adopts an N-type thermocouple.

6. The coal gasifier water-cooled wall ash deposition and slagging on-line monitoring device of claim 1 or 2, characterized in that: the total number of temperature sensor (1) is nine, nine the distance of temperature sensor (1) detection end extremely water-cooling wall (3) internal surface from top to bottom is respectively: 2mm, 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18 mm.

Technical Field

The invention relates to the technical field of dust deposition and slag bonding detection, in particular to a water-cooled wall dust deposition and slag bonding monitoring device.

Background

The safe and economic operation of the blast furnace is seriously threatened by the deposited ash and the slag on the heating surface of the water-cooled wall of the coal gasifier. The ash deposition and slagging of the water-cooled wall not only can reduce the heat conduction capability of a heating surface, but also can cause corrosion of the heating surface, weakening of the heat exchange capability of the water-cooled wall, abnormal furnace shutdown of a coal gasification furnace and increase of the maintenance cost of the coal gasification furnace. Therefore, the problem of ash deposition and slag bonding is widely concerned by domestic and foreign scholars, and a series of researches are carried out on the problem.

To solve this problem, a large number of studies have been conducted at home and abroad. At present, the foreign water-cooled wall online monitoring methods mainly comprise three methods: 1. and (5) diagnosing the smoke temperature at the outlet of the hearth. The pollution in the hearth can influence heat transfer, so that the temperature of outlet smoke changes, and the pollution degree in the hearth is indirectly judged through the temperature change of the smoke. 2. A heat flow meter was used as the sensor. The diagnosis is carried out according to the change of heat flow caused by the dust deposition by a heat flow meter arranged on a water cooling wall. 3. Direct observation by photographic and image processing techniques.

At present, on-line weighing measurement is realized for the growth of deposited ash and slagging, but on-line measurement of slagging thickness and on-line monitoring of the form of the slagging thickness are almost not realized. Inside the furnace, the operating mode environment is complicated, needs the thickness of measurement deposition slagging scorification, if adopt direct measurement's mode, and complicated and dynamic operating mode can produce the influence to the measuring result, how to reject these influences, makes the sensor only measure to the thickness of deposition slagging scorification, also is the difficult point of solving this problem.

Disclosure of Invention

The purpose of the invention is: aiming at the defects of the prior art, the coal gasifier water-cooled wall dust deposition thickness on-line monitoring device based on temperature measurement is provided.

The technical scheme of the invention is as follows: the utility model provides a coal gasifier water-cooled wall deposition slagging scorification on-line monitoring device, includes: more than two slender temperature sensors with the length distributed in an equal difference mode.

The temperature sensors are arranged in a stepped manner through the fixing device, the fixing device is embedded in the inner surface of the water-cooled wall, and the distance from the detection end of the temperature sensor to the inner surface of the water-cooled wall is gradually increased from top to bottom;

the temperature sensors are connected into the data processing unit through data lines, and the data processing unit is used for sorting the output data of the temperature sensors and drawing distribution maps of the temperatures of the measuring points of all the temperature sensors.

The working principle is as follows:

when the temperature sensors arranged in a ladder are covered with the dust, it is inevitable that a part of the temperature sensors having a long length is not covered with the dust. Since ash deposits and slag deposits have the effect of reducing heat conduction, a large difference necessarily occurs between the temperature values measured by the ash-covered temperature sensors and the temperature values measured by the uncovered temperature sensors, namely the temperature difference between two adjacent temperature sensors in a certain group is larger than that of any other group. The position where the large temperature difference occurs is determined as the surface position of the water-cooled wall covering the ash deposition and slag bonding, and is also necessarily the boundary position of the ash deposition covering, and the exposed length of the temperature sensor at the position is also the thickness of the ash deposition covering, so that the ash deposition and slag bonding thickness of the water-cooled wall is indirectly measured.

On the basis of the scheme, further, the fixing device is made of high-temperature-resistant ceramic materials, and the insulating property of the fixing device can effectively avoid the influence of the fixing device on the measurement accuracy of the temperature sensor; the surface of the fixing device is flush with the inner surface of the water wall.

On the basis of the scheme, the temperature sensors are further arranged at equal intervals, the distance between every two adjacent temperature sensors is 15mm, and mutual influence on temperature measurement caused by the fact that the distance between every two adjacent temperature sensors is too small is avoided.

On the basis of the scheme, the temperature sensor is an N-type thermocouple, the temperature of the N-type thermocouple is 1300 ℃ at the highest, the oxidation resistance is strong, the long-term stability is good, and the temperature measurement function can be well performed in the high-temperature environment in the coal gasification furnace.

On the basis of above-mentioned scheme, further, nine temperature sensor's quantity is total, and the distance of nine temperature sensor detection end to water-cooling wall internal surface from top to bottom is respectively: 2mm, 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18 mm.

Has the advantages that: the invention can realize the online monitoring of the ash deposition and slag bonding thickness of the water-cooled wall of the coal gasifier based on indirect measurement, provides guidance for the cleaning of the water-cooled wall of the coal gasifier and ensures the safe operation of the coal gasifier.

Drawings

FIG. 1 is an installation side view of the present invention;

FIG. 2 is a schematic view of the present invention arranged on a coal gasifier after ash deposition;

wherein: 1-temperature sensor, 2-fixing device and 3-water cooling wall.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Referring to the attached figure 1, the on-line monitoring device for the ash deposition and slag bonding of the water-cooled wall of the coal gasifier comprises: a plurality of elongated temperature sensors 1 having an equal length difference distribution. In this example, the temperature sensor 1 employs N-type thermocouples, the number of which is nine, and the lengths of which are 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm and 28mm, respectively.

Temperature sensor 1 fixes through high temperature resistant ceramic material's fixing device 2, is cascaded arranging and claps, and fixing device 2 inlays at the internal surface of water-cooling wall 3, carries out the trompil at coal gasifier water-cooling wall 3 and handles, and the trompil size is decided according to fixing device 2's size, later fixes monitoring devices unit mount on water-cooling wall 3, guarantees that fixing device 2's surface and water-cooling wall 3's internal surface looks parallel and level. The distance from the detection end of the nine temperature sensors 1 to the inner surface of the water wall 3 is sequentially increased from top to bottom and is respectively 2mm, 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm and 18mm, and the installation distance between every two adjacent sensors is 15 mm.

The nine temperature sensors 1 are connected to a data processing unit (such as a computer) through data lines, and the computer is used for sorting the data output by the temperature sensors 1 and drawing a distribution diagram of the temperature measured by all the temperature sensors 1.

Referring to the attached drawing 2, before the dust deposits on the water-cooled wall 3, the temperature sensors 1 on the surface of the water-cooled wall 3 are not covered by the dust deposits, and the detection ends of the nine temperature sensors 1 are all exposed in the furnace, so that the nine temperature sensors 1 are in the same temperature measurement environment, the measured temperature values are almost the same, that is, the temperature difference value measured by two adjacent temperature sensors 1 is almost zero.

After the water-cooled wall 3 deposits ash, when the water-cooled wall 3 is covered by ash deposition and slag bonding with a certain thickness, the temperature sensors 1 arranged on the water-cooled wall are also covered by the ash deposition, because the temperature sensors 1 exposed in the coal gasification furnace are in a slender shape, and the distance between two adjacent temperature sensors 1 is larger, only the temperature sensors 1 with the length being less than the ash deposition thickness can be covered by the ash deposition, and the temperature sensors 1 with the length being more than the ash deposition thickness can not be covered by the ash deposition, only a thin layer of ash deposition can be generated on the surface of the exposed part of the temperature sensors 1. Since the ash deposition has the function of blocking heat transfer, the temperature measured by the temperature sensor 1 covered by the ash deposition burial is obviously lower than that of the temperature sensor 1 uncovered by the ash deposition, and the measured temperature is gradually reduced along with the increase of the burial depth of the ash deposition, while the sensor uncovered by the ash deposition is only covered by a thin layer of ash deposition, so that the influence on the temperature measurement is small, and the measured temperature of all the sensors uncovered by the ash deposition is almost the same.

The temperature of each temperature sensor 1 is processed by a computer, and the position of the change of the measurement temperature of two adjacent temperature sensors 1 can be obviously found from the temperature index of the temperature sensor 1 with the longest length to the temperature index of the temperature sensor with the shortest length, and the position is the critical position covered by the deposition burial, namely the deposition surface position, and the sensor length at the position is the thickness of the deposition of the water wall. Because the length difference between two adjacent sensors is 2mm, the ash deposition thickness measured by the method is an estimated value and has a certain error with the actual situation. However, the method has important significance for monitoring the ash deposition thickness of the water-cooled wall of the coal gasifier and ensuring the safe and efficient operation of the coal gasifier.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.