KR20120020898A - Apparatus and process for removing iron particles in water solution - Google Patents

Abstract

PURPOSE: Apparatus and Process for removing iron particles in water solution is provided to easily purify iron particles without generating waste by using a neodymium permanent magnet assembly, a porous matrix, and using fluid pressure for transferring the permanent magnet assembly. CONSTITUTION: Apparatus and Process for removing iron particles in water solution comprises a tubular canister(11), a permanent magnet assembly(12), and a porous matrix(13). The porous matrix is mounted to the tubular canister. The cylindrical canister is fixed at constant height. The permanent magnet assembly is arranged near the canister, and fixed to hydraulic cylinder. The permanent magnet assembly is moved straightly. The porous matrix fills the inside of the canister. The porous matrix consists of magnetizable material.

Description

Apparatus and Process for removing iron particles in water solution

The present invention relates to an apparatus and method for removing particulate iron contained in water. More specifically, neodymium permanent magnets and hydraulic technology are used to remove particulate iron in the water, and after a certain period of time, the matrix is washed and reused to prevent energy waste and minimize waste generation such as filtration filters. A device and method for removing particulate iron which can be used continuously.

Since boiler water and steam in power plants are recycled at high flow rates at high temperatures and pressures, the water quality management standards are strictly set in order to prevent corrosion and obstacles in power generation facilities.

However, since most boilers and system piping are made of iron, however, pure water is used as supplemental water, and all volatile water treatment and oxygen injection treatment are used to prevent corrosion. Even though boiler water quality management is optimal, it is impossible to completely remove particulate iron in the water.

The cause of particulate iron is a phenomenon in which iron is physically dropped or worn out on metal surfaces such as boilers, water supply pipes, and pumps due to high velocity water flow.

Corrosion resistance of the used pipe material, boiler system water quality management method, temperature, pressure, etc. may influence the operating conditions such as temperature, so that the iron concentration of particulate matter may be increased or kept low. Particulate iron in the system water adheres to the boiler tube, causing corrosion (scorching, corrosion underneath the deposit), reducing heat transfer efficiency, and causing bursting due to tube overheating.

Attachment to steam turbine blades can cause turbine disturbances such as corrosion and vibration. Disturbance phenomena, such as boiler tube damage and turbine disturbances, can result in start-up delays and uninterrupted shutdowns, resulting in lower plant utilization and lower power generation efficiency.

Conventionally, if the iron concentration in water is higher than the water quality management standard, it is continuously discharged to waste water until it reaches normal water quality. However, if the high temperature water is discarded, it causes a waste of energy, and there is a problem that the cost of power generation increases due to the increase in the net production cost due to the large consumption of high pure water.

The present invention is a neodymium permanent magnet assembly having a high magnetic properties fixed to the outside of the canister to solve the above problems, installed inside the canister, a porous matrix for removing particulate iron in the water, hydraulic to move the permanent magnet assembly It is an object of the present invention to provide an apparatus and method for removing particulate iron contained in water, which can be easily purified by using no waste.

The particulate iron removal apparatus contained in the water of the present invention includes: a permanent magnet assembly disposed around a cylindrical canister and fixed to a hydraulic cylinder and capable of linear movement; A porous matrix filled in the canister and made of a magnetizable material; It is characterized by consisting of a hydraulic device for linearly moving the permanent magnet assembly.

According to the present invention, the permanent magnet assembly is composed of two stages of upper and lower neodymium permanent magnets for generating a high magnetic line in the matrix, the iron core is on the outer surface of the upper and lower two layers of neodymium permanent magnet in order to pass the magnetic lines without loss to the outside It is characterized in that the contact.

In addition, the present invention is characterized in that a porous pole made of a magnetizable material that is disposed on the top and bottom of the matrix and evenly passes the lines of magnetic force is added.

In addition, the cylindrical canister of the present invention is characterized in that it is manufactured from a material without magnetization and no magnetism.

In addition, the porous matrix of the present invention is characterized by combining any one or two or more of metal lath, metal ring, wool shape.

In addition, a differential pressure meter is imposed between the upper and lower portions of the matrix to determine the timing of the washing of the matrix, and when the washing time is reached, a washing water supply pipe, a water shutoff valve, a water flow passage and a shutoff valve are added to wash the matrix. It is done.

In addition, the method for removing particulate iron in the steam generation system of the present invention, the method comprising the steps of filling in the cylindrical canister having a predetermined height of the porous matrix of the magnetizable material; Supplying magnetic force lines to the matrix by upper and lower two-level permanent magnet assemblies fixed to an outer surface of the canister by a hydraulic cylinder; Contacting iron cores in the upper and lower stages of the permanent magnet assembly to prevent magnetic wire loss, passing water containing particulate iron through the magnetized matrix, removing particulate iron contained in the water from the magnetized matrix, and using it for a certain period of time. After measuring the differential pressure between the top and bottom of the matrix, the differential pressure reaches a certain reference value to shut off the water supply valve and to move the permanent magnet assembly to the area without the matrix by hydraulic pressure, the washing water supply pipe Opening the valve and supplying the washing water to the matrix, shutting off the washing water supply valve after a certain washing time, hydraulically moving the permanent magnet assembly to its original position around the matrix, opening the water supply valve to remove particulate iron Replenish the water contained in the And it characterized in that.

The present invention relates to an apparatus and a method for removing particulate iron contained in water by using permanent magnets and hydraulic technology. When this method is used, it is semi-permanently contained in water without problems such as filtration filter waste generation in the conventional method. It can be used for the iron removal process, and it can be expected to efficiently operate the power generation facilities by reducing the discharge of hot steam generating equipment to reduce energy waste and pure water production costs, and prevent the generation of waste filtration filter.

In particular, by completely removing the particulate iron present in the water and reused, it is possible to prevent the rupture accident due to scaling of the boiler tube and tube overheating.

1 is a side view of a particulate iron removal apparatus (when purifying) contained in water according to the present invention.
Figure 2 is a side view of the particulate iron removal apparatus (when washing) contained in the water according to the present invention.
Figure 3 is a perspective view of a permanent magnet and iron core holder which is a part of the cylindrical permanent magnet assembly according to the present invention.
Figure 4 is a graph showing the test results for the removal rate (%) of particulate iron according to the flow rate change using the iron removal apparatus according to the present invention.
Figure 5 is a graph showing the test results of the particulate iron removal concentration (ppb) over time using the iron removal apparatus according to the present invention.
Figure 6 is a graph showing the turbidity change (NTU) test results due to the particulate iron in the reverse bird during the matrix washing using the iron removal device according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

In the accompanying drawings, Figure 1 shows a side view of the particulate iron powder removing device (when purifying) 10 contained in the water according to the present invention, Figure 2 is a particulate iron powder removing device (when washing) contained in the water according to the present invention The side view of (10) is shown. 1 and 2, the apparatus according to the present invention is largely classified into a cylindrical canister 11, a permanent magnet assembly 12 having high magnetic properties fixed to the outside of the canister 11, and installed in the canister 11 It is composed of a porous matrix 13 made of an iron material capable of magnetizing to remove particulate iron in water, and a hydraulic cylinder 14 for moving the permanent magnet assembly.

That is, the permanent magnet assembly 12 is made of a material that is not magnetized as a whole and has no magnetism, for example, plastic, as shown in an enlarged view in FIG. 3, and has upper and lower permanent magnets formed in a pentagonal column at the center. It is formed in a triangular pillar shape around the installation portion 111 and the outer portion is formed in a generally cylindrical structure in which the iron core fixing portion 112, which is erected vertically in a round shape, is assembled at regular intervals, and the permanent magnet is installed. The neodymium permanent magnet 17 is assembled to the upper and lower portions of the part 111, and the iron core 18 is formed between the iron core fixing part 112 to form a passage of magnetic force lines while contacting the upper and lower permanent magnets 17. ) Will be assembled.

The cylindrical canister 11 of the device of the present invention is fixed at a fixed height by a fixed cylinder 15, and inside thereof is filled with a porous matrix 13 of a magnetizable material capable of water flow, and at its upper and lower portions. Porous poles 16 made of a magnetizable material are additionally installed to allow the magnetic force lines to pass evenly.

The porous matrix 13 may be manufactured by combining any one or two or more of metal laths, metal rings, and wool shapes.

On the other hand, on the outer surface of the cylindrical canister 11, as mentioned above, the permanent magnet assembly 12 is arranged in a circumferential shape, but the neodymium permanent magnet 17 is upper and lower two stages (three to 50 permanent in one stage) It consists of a magnet), and it is comprised so that a linear motion may be performed in the up-down direction by the hydraulic cylinder 13. The permanent magnet assembly 12 serves to supply a high magnetic force line to the porous matrix 13 that is filled in the canister (11).

Here, the installation interval of the permanent magnet of the two stages is preferably set to about 50mm to 300mm. If the permanent magnet assembly is out of the above range, the magnetic density of the matrix becomes low, which is undesirable.

And the upper and lower outer neodymium permanent magnet 17 of the permanent magnet assembly 12, the iron core (Yoke) (18) is provided so as to pass the magnetic field lines without loss. The thickness of the iron core is preferably set to about 10mm to 70mm. If there is no iron core, loss of magnetic lines occurs, and if the iron core is too thin, the magnetic density of the matrix becomes low, which is undesirable.

According to the present invention, a differential pressure measuring instrument (not shown) is installed between the water supply pipe 19 and the water discharge pipe 20 to measure the pressure of the water flowing through the upper and lower portions of the porous matrix 13. It will determine when to wash between.

According to the present invention, the washing water supply pipe 21, the water shutoff valve, the wash water passing and the shutoff valve may be additionally installed to wash the matrix when the washing time is reached by the differential pressure measuring instrument. In FIG. 1, reference numeral 19 is used as a supply pipe for water during a normal iron removal process, and used as a discharge pipe for washing water when washing the matrix.

The method for removing particulate iron contained in water using the particulate iron removal device in the steam generating system water according to the present invention configured as described above is as follows.

According to the present invention, first, as shown in FIG. 1, the porous matrix 13 of a magnetizable material is filled into a canister 11 having a predetermined height, and fixed to the outer surface of the canister 11 by a hydraulic cylinder 13. The magnetic force lines are supplied to the matrix 13 by the upper and lower permanent magnet assemblies 12.

Next, the iron core 18 is brought into contact with the upper and lower two stages of the permanent magnet assembly 12 so as not to lose magnetic lines from the outside, and water containing particulate iron is passed through the supply pipe 19 through the magnetized matrix 13. The particulate iron contained in the water is removed by the magnetized matrix 13 and the water is purified.

As such, if the purification process is repeated while removing iron contained in the water for a predetermined period of time, the efficiency of the matrix 13 is lowered, and thus the matrix 13 needs to be washed. To this end, the differential pressure between the upper and lower portions of the matrix 13 is measured by using a differential pressure gauge. When the differential pressure reaches a certain washing reference value, the water supply valve (not shown) is shut off, and the permanent magnet assembly as shown in FIG. The hydraulic force of the matrix is eliminated by moving (12) downward using the hydraulic cylinder 14 to the area where the matrix 13 is not present.

Next, after opening the valve of the washing water supply pipe 21 to supply the washing water to the matrix 13 and washing it for a predetermined time, the washing water supply valve (not shown) is shut off, and the permanent magnet assembly 12 is hydraulically The cylinder 14 is used to move back to its original position around the matrix 13. Then, the valve of the washing water supply pipe 21 is shut off and the valve of the water supply pipe 19 is opened to supply water containing particulate iron to the inside of the canister through the supply pipe 19 to resume the removal of particulate iron. .

In this way, neodymium permanent magnets and hydraulic technology can be used to remove particulate iron in the water and to wash the porous matrix and reuse it after a certain period of time, thereby preventing energy waste and minimizing waste.

The present invention will be described in more detail based on the following examples.

Example

A pilot test was performed to evaluate the removal performance of particulate iron in boiler feedwater at the plant site. Experimental conditions are as follows and the particulate iron removal performance was calculated by measuring the iron concentration introduced into the apparatus of the present invention and the iron concentration after treatment. In addition, when iron was accumulated in the matrix, the permanent magnet assembly was hydraulically moved to the non-matrix area and the matrix was washed. Matrix washing effect over time was confirmed by measuring the turbidity of the wash water.

1. Test condition

-Design flow rate of pilot particulate iron removal device: 3 ㎥ / hr

-Installation place: Rear end of thermal power plant COP (Condensate Pump)

Iron analysis: Determination of particulate iron concentration before and after treatment using LIBD (Laser Induced Breakdown Detection)

-Turbidity measurement: Turbidity measurement with NTU turbidimeter for evaluating washing efficiency

2. Test result

end. Particulate Iron Removal Rate

Using the apparatus of the present invention, the particulate iron removal performance according to the water flow rate change was measured. Figure 3 shows the test results for the removal of particulate iron, the performance decreases slightly as the treatment flow rate is increased to 20, 30, 40, 50, 60 L / min, but in any case 98% or more of particulate iron It showed excellent performance.

I. Removal rate over time

Figure 4 shows the change in particulate iron removal performance over time. After 30 minutes of operation of the device of the present invention, the removal rate increased to 97% level and remained constant. It was judged that the high iron concentration was observed at the initial stage of operation, because the particulate iron present in the pipe was washed and flowed into the treated water.

All. Matrix cleaning efficiency

No increase in differential pressure was observed during the field application test, and the results of the turbidity change caused by the particulate iron in the backwashing water during the matrix cleaning after 5 hours of operation are shown in FIG. 6. It was found that about 4 minutes after the start of washing, the washing of the matrix was completed.

As described and demonstrated in the above experimental results, according to the apparatus and method for removing particulate iron in the water according to the present invention, it is possible to remove more than 98% of the particulate iron contained in the water, and permanently by using hydraulic pressure after a certain period of time. The matrix was cleaned in a short time by cleaning the matrix while the magnet assembly was moved to a position where the matrix was not present.

10 ---- Iron Removal Device
11 ---- canister
12 ---- permanent magnet assembly
13 ---- porous matrix
14 ---- hydraulic cylinder
15 ---- fixed support
16 ---- porous pole
17 ---- neodymium permanent magnet
18 ---- Iron core
19 ---- Water supply pipe / wash water discharge pipe
20 ---- Water discharge piping
21 ---- Washing water supply piping

Claims (8)

A cylindrical canister mounted with a porous matrix of a magnetizable material and fixed at a predetermined height; A permanent magnet assembly disposed around the canister and fixed to the hydraulic cylinder to move linearly; A porous matrix filled in the canister and made of a magnetizable material; An apparatus for removing particulate iron contained in water, comprising a pipe for supplying water containing iron and pipes and valves for discharging treated water. The method according to claim 1,
The permanent magnet assembly is composed of two stages of upper and lower neodymium permanent magnets for generating high magnetic lines in the matrix, the iron core is in contact with the outer surface of the upper and lower two layers of neodymium permanent magnets to pass the magnetic lines without loss to the outside An apparatus for removing particulate iron contained in water. The method according to claim 1,
A device for removing particulate iron contained in water, which is disposed on the upper and lower portions of the matrix and has a porous pole made of a magnetizable material that evenly passes magnetic lines of force. The method according to claim 1,
The cylindrical canister is a particulate iron powder removal device contained in the water, characterized in that the magnetization is made of a non-magnetic material. The method according to claim 1,
The porous matrix is an iron material capable of magnetization, and any one or two or more of metal lath, metal rings, and wool shapes are combined. The method according to claim 1,
Particle iron removal device contained in the water, characterized in that the differential pressure meter is added between the top and bottom of the matrix to determine the timing of cleaning the matrix. The method according to claim 1,
Particulate iron removal device contained in the water, characterized in that the washing water supply pipe, the washing water passing through and the shut-off valve is added to wash the matrix. Filling the canister with a porous matrix of magnetizable material; Supplying magnetic force lines to the matrix by upper and lower two-level permanent magnet assemblies fixed to an outer surface of the canister by a hydraulic cylinder; Contacting the iron core in the upper and lower two stages of the permanent magnet assembly to prevent the loss of magnetic lines; Water flowing through the magnetized matrix, particulate iron contained in the water is removed from the magnetized matrix, measuring the differential pressure between the top and bottom of the matrix after a certain period of time Shut off the water supply valve when the reference value is reached and move the permanent magnet assembly to the matrix free area by hydraulic pressure.Open the valve of the water supply pipe and supply the wash water to the matrix. After the step of shutting off the washing water supply valve, moving the permanent magnet assembly to the original position around the matrix by hydraulic pressure, opening the water supply valve to supply water containing particulate iron to resume the removal of particulate iron. A method for removing particulate iron contained in water.

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