CN216869701U

CN216869701U - Liquid level detection device of flash evaporator

Info

Publication number: CN216869701U
Application number: CN202220673061.4U
Authority: CN
Inventors: 孙丰凯
Original assignee: Beijing Jinde Chuangye Control Technology Co ltd
Current assignee: Beijing Jinde Chuangye Control Technology Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-07-01
Anticipated expiration: 2032-03-25

Abstract

The utility model discloses a liquid level detection device of a flash evaporator, which comprises a flash evaporator tank body, wherein a Na22 radioactive source is arranged in the flash evaporator tank body, the Na22 radioactive source is connected with the flash evaporator tank body through a suspender structure, a receiver for capturing gamma rays emitted by the radioactive source is arranged outside the flash evaporator tank body, and the receiver transmits signals to a data processor through cables. The detection device uses the Na22 exempted by the environmental protection department as the radioactive source, thereby avoiding potential personal injury of operators, and the detection device uses a multi-section suspender structure to lead the radioactive source to go deep into the flash evaporator for measurement from the original standby hole at the top of the flash evaporator, thereby not only avoiding the trouble of opening the hole of the tank body, but also ensuring the stability of the measurement of the Na22 low-dose radioactive source.

Description

Liquid level detection device of flash evaporator

Technical Field

The utility model relates to the field of alumina flash evaporators, in particular to a liquid level detection device of a flash evaporator.

Background

In the production process of alumina, the control of a dissolution flash system is the key of the steam-heat energy conversion balance in the dissolution process and also the key of the control of a stable production process for preventing steam strips, and the flash control is not good, so that process and equipment accidents such as flash strip or flash feed pipe abrasion are very likely to occur. Flash evaporation of the material may cause secondary steam pollution, and may also scar or even block the heating tube bundle of the single tube jacket and the preheating autoclave. The heat exchange effect of the preheater is reduced, so that the consumption of new steam is increased, and the difficulty of flash evaporation control is increased. And the abrasion of the flash evaporation feed pipe can restrict the safe operation of the flash evaporation system, increase the consumption of spare parts and the workload of maintenance, reduce the operation rate of equipment, the capacity of the equipment and the like.

The liquid level in the flash evaporator plays a decisive role in the pressure and the generated amount of the flash evaporator, the liquid level is controlled to be between 20 and 70 percent (the liquid level control in different application fields is slightly different), and the liquid level is too low and has no flash evaporation amount; too high then do not have the space to come the flash distillation, therefore the liquid level control in the flash tank is made for key process, but because the material operating mode of flash vessel the inside: the ordinary liquid level meter has the advantages that the temperature is high, the pressure is high, the liquid level meter contains high-pressure steam, a rain-shaped environment, scars are prone to forming and the like, so that the ordinary liquid level meter is inexperienced in liquid level detection and control, and accidents caused by liquid level measurement are frequent, so that the aluminum oxide industry urgently needs a liquid level measuring meter which is convenient to install, free of pollution to the environment, free of damage to a human body, stable in work and small in maintenance amount.

At present, liquid level measurement in an alumina flash evaporator is mostly a non-contact measurement mode of a radioactive instrument, and is generally performed by taking 'Co 60 or Cs 137' as a radioactive source, however, a level meter adopting 'Co 60 or Cs 137' as the radioactive source is a non-exemption type radioactive level meter, the activity of the radioactive source is different according to the diameter and the wall thickness of each stage of flash evaporator, but the activity is common, namely the activity is relatively high, great inconvenience is brought to maintenance and daily production operation, and in particular, in a shutdown maintenance stage, a professional is required to disassemble and reassemble a radioactive source, so that various workloads and potential dangers are increased invisibly.

SUMMERY OF THE UTILITY MODEL

Based on the problems, the utility model aims to provide a liquid level detection device of a flash evaporator, which uses Na22 exempted by the environmental protection department as a radioactive source, a human body can be discharged from the body through metabolism after being irradiated by a Na22 exempted source for 24 hours, and the detection device utilizes an original standby hole at the top of the flash evaporator to lead the radioactive source to go deep into the flash evaporator for measurement, thereby not only avoiding the trouble of opening a tank body, but also ensuring the stability of the measurement of the Na22 low-dose radioactive source.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a liquid level detection device of a flash evaporator, which comprises a flash evaporator tank body, wherein a Na22 radioactive source is arranged in the flash evaporator tank body, the Na22 radioactive source is connected with the flash evaporator tank body through a suspender structure, a receiver for capturing gamma rays emitted by the radioactive source is arranged on the outer side of the flash evaporator tank body, and the receiver transmits signals to a data processor through a cable.

Furthermore, the suspender structure comprises a radioactive source fixing pipe for placing the Na22 radioactive source, and the radioactive source fixing pipe is connected with the flash evaporator tank body through a plurality of connected suspenders.

Further, two adjacent suspension rods are fixed through pins.

Further, the radioactive source fixing tube and the adjacent hanger rod are fixed through a pin.

Further, the number of the Na22 radioactive sources is multiple, and the sources are arranged in the radioactive source fixing tube at intervals from top to bottom.

Furthermore, be located the top of jib is provided with the flange, the flange passes through bolt assembly to be fixed on the flange hole at flash vessel jar body top.

Compared with the prior art, the utility model has the beneficial technical effects that:

the detection device uses the Na22 exempted by the environmental protection department as the radioactive source, so that potential personal injury of operators is avoided, the detection device utilizes a multi-section suspender structure to lead the radioactive source to go deep into the flash evaporator for measurement from an original standby hole at the top of the flash evaporator, the trouble of opening a tank body is avoided, and the stability of the measurement of the Na22 low-dose radioactive source is ensured.

Drawings

The utility model is further illustrated in the following description with reference to the drawings.

FIG. 1 is a schematic structural diagram of a liquid level detection device of a flash evaporator in an embodiment of the utility model;

FIG. 2 is a schematic view of the components of a boom structure in an embodiment of the present invention;

FIG. 3 is a schematic view of the connection between adjacent hanger rods and between the hanger rods and the tube for fixing the source in the embodiment of the present invention.

Description of reference numerals: 1. a flash evaporator tank body; 2. a source of Na22 radiation; 3. a boom structure; 301. a radioactive source fixing tube; 302. a boom; 303. a flange; 4. a receiver; 5. a data processor; 6. a pin.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, the embodiment discloses a flash evaporator liquid level detection device, which includes a flash evaporator tank 1, a Na22 radioactive source 2 is disposed inside the flash evaporator tank 1, a receiver 4 for capturing gamma rays emitted by the radioactive source is disposed outside the flash evaporator tank 1, and the receiver 4 transmits signals to a data processor 5 through a cable.

The liquid level detection process comprises the following steps: the radioactive source arranged in the flash evaporator emits gamma rays, the gamma rays penetrate through the wall of the bin and the measured medium changes along with the liquid level of the medium, the intensity of the gamma rays captured by the receiver 4 changes correspondingly, the receiver 4 converts the captured radiation intensity into an electric signal and outputs the electric signal to the data processor 5, and the data processor 5 displays the liquid level state in real time by calculating the data of the receiver.

The liquid level detection device of the alumina flash evaporator in the embodiment adopts the national exemption type Na22 radioactive source for measurement, because the radiativity of the exemption type Na22 radioactive source is very low (less than 1 multiplied by 10)⁶Bq belongs to the safety exemption level) has no pollution to the environment and no harm to human body.

The Na22 radioactive source 2 is connected with the flash evaporator tank body 1 through the suspender structure 3, and the radioactive source is installed by using a reserved standby hole at the top of the flash evaporator, so that the trouble of opening the hole is avoided. Particularly, jib structure 3 is including the fixed pipe 301 of radiation source that is used for placing Na22 radiation source 2, the fixed pipe 301 of radiation source can select the material for use and be in the diphase steel pipe, the welding of pipe both ends is sealed, the quantity of Na22 radiation source 2 is a plurality of, and from the top down interval arrangement in proper order is in the fixed pipe 301 of radiation source, during concrete operation, imbed the radiation source in proper order on an aluminum strip earlier, the aluminum strip that will have the radiation source again inserts in the radiation source fixed pipe, the height is equal with the fixed pipe of radiation source, after the fixed pipe both ends welding shutoff of radiation source, the aluminum strip of fixed radiation source has just stood upright at the fixed pipe 301 of radiation source.

The radioactive source fixing pipe 301 is connected with the flash evaporator tank 1 through a plurality of connected hanging rods 302. The jib 302 can be 1 meter one section, and the installation operation of being convenient for, the fixed pipe 301 of radiation source is fixed through pin 6 with adjacent jib 302, also adopts pin 6 to fix between two adjacent jibs 302, can effectually prevent that jib 302 thermal expansion from droing. Wherein, the uppermost end of the hanger rod 302 positioned at the topmost part is welded with a flange 303, and the flange 303 is fixed on a flange hole at the top of the flash evaporator tank body 1 through a bolt component.

Generally speaking, the liquid level detection device of the alumina flash evaporator using the exemption type Na22 radioactive source can realize stable measurement, a using unit can save investment cost and a large amount of fixed maintenance and management cost every year, and meanwhile, a relatively non-exemption type liquid level meter avoids potential personal injury of operators. The exemption meter can be used as a conventional meter.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. The utility model provides a flash vessel liquid level detection device, includes the flash vessel jar body (1), its characterized in that: the inside Na22 radiation source (2) that is provided with of flash vessel jar body (1), Na22 radiation source (2) pass through boom structure (3) with the flash vessel jar body (1) links to each other, the flash vessel jar body (1) outside is provided with receiver (4) that are used for catching the radiation source and send gamma ray, receiver (4) are through cable with signal transmission to data processor (5).

2. The flash evaporator liquid level detection apparatus according to claim 1, wherein: the suspender structure (3) comprises a radioactive source fixing pipe (301) for placing the Na22 radioactive source (2), and the radioactive source fixing pipe (301) is connected with the flash evaporator tank body (1) through a plurality of connected suspenders (302).

3. The flash evaporator liquid level detection apparatus according to claim 2, wherein: two adjacent suspension rods (302) are fixed through pins.

4. The flash evaporator liquid level detection apparatus according to claim 3, wherein: the radioactive source fixing tube (301) and the adjacent suspension rod (302) are fixed through a pin.

5. The flash evaporator liquid level detection apparatus according to claim 2, wherein: the number of the Na22 radioactive sources (2) is multiple, and the Na22 radioactive sources are sequentially arranged in the radioactive source fixing tube (301) at intervals from top to bottom.

6. The flash evaporator liquid level detection apparatus according to claim 2, wherein: and a flange (303) is arranged at the uppermost end of the topmost suspender (302), and the flange (303) is fixed on a flange hole at the top of the flash evaporator tank body (1) through a bolt assembly.