CN216594365U

CN216594365U - Movable automatic ash-removing high-temperature sampling probe

Info

Publication number: CN216594365U
Application number: CN202121874204.XU
Authority: CN
Inventors: 赵喜清; 徐瑛; 陈华申; 敖小强
Original assignee: Beijing SDL Technology Co Ltd
Current assignee: Beijing SDL Technology Co Ltd
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2022-05-24
Anticipated expiration: 2031-08-11

Abstract

This patent belongs to cement gas analysis device technical field. This patent provides portable automatic deashing high temperature sampling probe, includes: ash removal movable device, filter, the intermediate layer in the outside, the innermost intermediate layer. Adopt the device of this patent can realize: (1) the probe can automatically clean ash and purge without withdrawing from the kiln; (2) the probe has light weight and high heat exchange efficiency, and is not deformed after long-term use; (3) the probe is directly in flange butt joint with the high-temperature filter, so that no cold spot exists, no blockage occurs, and the sealing performance is good; (4) the sample gas channel is narrow, and large granule dust can't get into inside the probe.

Description

Movable automatic ash-removing high-temperature sampling probe

Technical Field

This patent belongs to cement gas analysis device technical field.

Background

In the cement production process, various gases such as CO and O in the cement kiln are required to be treated₂、NO、CO₂And the on-line analysis is carried out, the real-time monitoring of the combustion condition is realized, the combustion efficiency is improved by adjusting measures such as air intake and the like, and the control of energy consumption, the optimization of cement clinker quality and safety early warning are realized. High temperatureThe sampling probe is a gas sampling device applied to the cement production process, can penetrate through a smoke chamber and extend into a kiln for continuously sampling high-temperature, corrosive and dust-containing process gas from a rotary kiln and ensuring the normal analysis of a subsequent gas analysis system, and extends into a total length of about 1700 plus 2000mm, so that the sampled product can reflect the components of combustion gas in the kiln more truly, the cement production process is controlled more accurately, the combustion efficiency is improved, and the purposes of energy conservation and emission reduction are achieved. It is one of the core configurations of a whole set of high-temperature gas analysis system. The temperature of the rotary cement kiln is up to 1200-1400 ℃, the corrosion of the medium is strong, and the content of dust particles is large. The dust content in the rotary cement kiln can reach 2000g/m³The sample gas containing high dust enters the sample filter after passing through the probe, the probe and the filter are blocked by the dust in a short time, the general probe is withdrawn from the kiln for cleaning by blowing after being used for a few hours, the temperature of the high-density dust and the temperature of other media are rapidly reduced along with the withdrawal of the probe, the high-density dust is easily adhered to the inner wall of the probe and the inner and outer surfaces of the filter, the high-density dust is sometimes not blown off and is manually disassembled for cleaning, and great inconvenience is brought to the field use. The existing sampling probe has the following characteristics: (1) the cooling loop has low efficiency, the temperature of the outer wall of the probe is high, and the probe deforms after being used for a long time; (2) the probe is blocked, the ash is difficult to remove, and continuous sampling for a long time cannot be realized; (3) the probe is connected with the high-temperature filter through a stainless steel pipe, and the stainless steel pipe is frequently blocked due to cold spots and cannot be cleaned; (4) in addition, the stainless steel tube is easy to leak gas when being connected with the probe and the high-temperature filter.

Disclosure of Invention

This patent is to this, has proposed portable automatic deashing high temperature sampling probe, includes: ash removal movable device, filter, the intermediate layer in the outside, the innermost intermediate layer.

In a specific embodiment of this patent, the ash removal motive means comprises: ash removal movable block, ash removal actuating lever, ash removal connecting axle, cylinder.

In a particular embodiment of the patent, the filter is internally provided with a filter cartridge.

In a specific embodiment of the patent, an air passage controlled by a solenoid valve is further arranged on the interior of the filter.

In a specific embodiment of the patent, an electromagnetic valve is further arranged on a gas path controlled by the electromagnetic valve.

Adopt the device of this patent can realize: (1) the probe can automatically clean ash and purge without withdrawing from the kiln; (2) the probe has light weight and high heat exchange efficiency, and is not deformed after long-term use; (3) the probe is directly in flange butt joint with the high-temperature filter, so that no cold spot exists, no blockage occurs, and the sealing performance is good; (4) the sample gas channel is narrow, and large granule dust can't get into inside the probe.

Drawings

FIG. 1 is a diagram of a mobile automatic ash removal high temperature sampling probe. Wherein, 1 is the sample gas import, 2 is the deashing movable block, 3 is the deashing actuating lever, 4 is the deashing connecting axle, 5 is the heat transfer liquid import, 6 is the heat transfer liquid export, 7 is the flange, 8 is the filter, 9 is the solenoid valve, 10 is the filter core, 11 is the gas outlet, 12 is the cylinder.

Detailed Description

Interpretation of related terms:

sample gas: i.e. sample gas, various fumes produced by combustion of fuel in cement kilns during cement production, these fumes containing N₂、O₂、SO₂CO, NO, etc.;

a probe: a round bar which is specially designed and processed and extends into the cement kiln to take out sample gas;

a filter: the equipment capable of filtering dust, particle and other impurity from fluid may have different filtering pore sizes.

Ash removal movable block: and a part which is arranged in the probe and moves back and forth by external force to loosen or remove the solid matters in the gas channel.

Heat exchange liquid: and in the process of sampling the probe, the liquid for cooling the probe, cold heat exchange liquid flows into the probe for heat exchange and then flows out of the probe, and the liquid is cooled and then is continuously sent into the probe for recycling.

Dew point temperature: when the moisture content (moisture content) of the sample gas is not changed, the temperature at which the sample gas reaches a saturated state by cooling is referred to as a dew point temperature. In other words, the temperature at which the water content of the sample gas condenses into water droplets.

The design of sampling probe has mainly been carried out to these abominable operating modes to this scheme. In order to cope with high temperature in the process, the outer layer of the probe is made of high-temperature-resistant stainless steel materials, and a closed cooling loop system is arranged, liquid water is easy to separate out after the temperature of a sample medium is reduced, and the sample medium and part of gas form acidic compounds and have extremely strong corrosivity on the probe, so that a temperature and flow control device is added in the cooling loop system, the probe is prevented from being burnt out in a high-temperature environment, and the temperature of each medium in the sample is ensured to be above the dew point temperature after heat exchange between loop cooling liquid and the sample is carried out. Therefore, the corrosion of the sample gas to the whole probe can be greatly reduced. Meanwhile, the device also solves the problem of probe blockage.

The patent provides a portable automatic deashing high temperature sampling probe, including sample gas import 1, deashing movable block 2, deashing actuating lever 3, deashing connecting axle 4, heat transfer liquid import 5, heat transfer liquid export 6, flange 7, filter 8, solenoid valve 9, filter core 10, gas outlet 11, cylinder 12, outside intermediate layer 13, intermediate layer 14, innermost intermediate layer 15, the gas circuit 16 of solenoid valve control.

The movable automatic ash removal high-temperature sampling probe extends into the rotary cement kiln by means of a moving device to sample gas, the probe is of a cylindrical structure, and three interlayers and one set of ash removal movable device are arranged in the probe.

Three interlayers are arranged in the movable automatic ash removal high-temperature sampling probe and are of an annular structure, the outermost interlayer 13 is a channel for cold heat exchange liquid to enter the whole probe, the middle interlayer 14 is a channel for hot heat exchange liquid after heat exchange to return to the outside of the probe, and the outermost layer 13 and the middle interlayer 14 form a closed cooling loop. The innermost interlayer 15 is a sample gas channel, and the sample gas in the kiln flows into a sampling probe through a narrow channel, passes through the filter 8 and enters an analyzer for component analysis.

The heat exchange liquid enters the outermost interlayer through the heat exchange liquid inlet 5, passes through the middle interlayer and flows out from the heat exchange liquid outlet 6.

The ash removal movable block 2 and the innermost interlayer 15 form a sample gas inlet space and a sample gas channel, and can reciprocate under the drive of the ash removal connecting shaft 4 and the cylinder 12, so that the ash removal function is realized. The inner side of the sample gas channel, namely the center of the whole probe is provided with the ash removal movable device, the device can move back and forth in the sample gas channel at variable time, the ash removal movable block is pushed to extend out of the probe to remove dust solid particles at the inlet of the probe, and meanwhile, the dust solid particles entering the narrow sample gas channel are ensured to be in a loose state and not to be adhered to the wall of the sample gas channel, the loose dust solid particles can be regularly blown back to the rotary kiln through back blowing nitrogen, the blockage of the sample channel due to long-time accumulation is avoided, and the continuous sampling of the probe is ensured. The middle of the sample introduction channel of the probe is provided with a deashing movable block which has a clearance of only a few tenths of millimeters with the inner wall of the sample introduction channel, when in sampling, sample gas flows through the clearance to reach a filter and an analyzer at the tail end of the probe, the narrow clearance is equivalent to a thick filter, and particulate matters exceeding the size of the clearance in the sample gas cannot enter the probe. The movable block is driven by an external cylinder to move back and forth irregularly through the connecting rod, the movable block is located in the probe at a moment and extends out of the probe at a moment, and dust attached to the narrow sample gas channel can be moved back and forth to be in a loose state, so that the movable block is not stuck on the pipe wall for a long time. When the ash removal movable block extends out of the probe at a certain time, sampling is stopped at the moment, a Programmable Logic Controller (PLC) automatically opens the tail end of the probe to blow back nitrogen gas, fine dust particles in the inner wall of the filter, the outer wall of the filter element and the sample gas channel are blown back into the kiln, the sampling state is automatically switched back after the blowing back is finished, and sampling analysis is continued. The operation is repeated, the probe can finish the actions of dust removal and dust removal without withdrawing from the kiln, and the continuous work of the sampling system is ensured.

The filter 8 is directly butted with the tail end of the probe, the connection through a pipeline is not needed, the flange 7 is directly butted and sealed instead, so that no cold spot exists between the probe and the filter, the temperature of the sample gas is always above the component dew point temperature, the liquid condensation phenomenon can not occur in the whole sampling process, and the problem of blockage of the probe and the filter caused by temperature change can be greatly improved.

The sampling gas enters the innermost interlayer of the probe rod through the sample gas inlet 1, passes through the filter 8, is filtered by the filter element 10, and finally is connected with corresponding equipment or a connector through the gas outlet 11; the reverse blow is realized, and the blow-back gas enters the filter 8 through the gas outlet 11, the gas circuit 16 controlled by the electromagnetic valve or the filter element 10 and then enters the innermost interlayer of the probe rod to realize blow-back.

Adopt the device of this patent can realize: (1) the probe can automatically clean ash and purge without withdrawing from the kiln; (2) the probe has light weight and high heat exchange efficiency, and is not deformed after long-term use; (3) the probe is in direct flange butt joint with the high-temperature filter, so that no cold spot exists, no blockage exists, and the sealing performance is good; (4) the sample gas channel is narrow, and large granule dust can't get into inside the probe.

Claims

1. Portable automatic deashing high temperature sampling probe, its characterized in that, the probe outside is cylindric structure, and inside has three intermediate layer and one set of deashing head, includes: the ash removal device comprises an ash removal movable device, a filter, an outermost interlayer, a middle interlayer and an innermost interlayer;

the outermost interlayer is a channel for cold heat exchange liquid to enter the whole probe;

the middle interlayer is a channel for returning hot heat exchange liquid after heat exchange to the outside of the probe;

the outermost layer and the intermediate interlayer form a closed cooling loop;

the innermost interlayer is a sample gas channel;

the ash removal movable device is positioned in the innermost interlayer and comprises: the ash removal device comprises an ash removal movable block, an ash removal driving rod, an ash removal connecting shaft and a cylinder;

the ash removal movable block and the innermost interlayer form a sample gas inlet space and a sample gas channel, and the sample gas inlet space and the sample gas channel can reciprocate under the drive of the ash removal connecting shaft and the cylinder.

2. The mobile automatic ash removal high temperature sampling probe according to claim 1, wherein a filter element is arranged inside the filter.

3. The mobile automatic ash removal high-temperature sampling probe according to claim 1, wherein a gas circuit controlled by a solenoid valve is further arranged on the interior of the filter.

4. The mobile automatic ash removal high-temperature sampling probe according to claim 3, wherein a solenoid valve is further arranged on a gas path controlled by the solenoid valve.