JPS6048210B2 - electromagnetic filter machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an electromagnetic filter for the purpose of removing corrosion products called cladding from high-temperature, high-pressure water systems in thermal power generation, nuclear power generation, etc. The invention relates to so-called high-gradient electromagnetic filters, which are filled with a high-gradient magnetic field and thereby generate a high-gradient magnetic field.

In a conventional electromagnetic filter filled with a matrix, the matrix needs to be cleaned when the differential pressure increases due to the trapping of crud in the matrix, or when the trapping ability decreases and the filtered water deteriorates. In general, in the case of granular matrices, they are fluidized by high-speed flow and effectively cleaned by scrubbing, but with matrices such as steel wool, the scrubbing effect due to fluidization cannot be expected, so the filtration efficiency is However, the cleaning process was difficult, and effective filtration was not possible. The present invention aims to accurately eliminate these conventional drawbacks, and utilizes the energy of high-temperature, high-pressure water to provide effective cleaning, high-quality, and economically inexpensive filtration. The purpose is to provide an electromagnetic filter that can obtain a large amount of water with a simple structure and at low cost.

The present invention has a space at least equal to or larger than the matrix volume on the filtrate outflow side of the matrix of the electromagnetic filter,
A quick-opening valve is provided on the inflow side of the matrix, and the matrix can be cleaned by opening the quick-opening valve while the high-temperature, high-pressure water to be treated is sealed in the space. It is an electromagnetic filter.

To explain the embodiment with reference to the drawings, a matrix 2 is held in a canister 1 by a water flow partition plate 3, and spaces 11 and 12 are defined on the inflow side and/or the filtrate outflow side.

That is, a space 11 larger than the volume of the matrix is sectioned at least on the filtrate outflow side of the matrix 2 in the canister 1. The water-permeable diaphragm 3 is a perforated plate or other water-permeable diaphragm, and serves to hold the matrix 2, such as steel wool, and at the same time distribute water uniformly. Further, an electromagnetic coil 4 is arranged surrounding the outside of the matrix 2, and when a direct current flows through this coil 4, the matrix 2 is magnetized, and the magnetic wheels are converged on the tip of the steel wool to generate a high It is configured to generate a gradient. In addition, an inflow valve 5 is provided in the inflow path 9 communicating with the space 12 on the inflow side of the matrix 2, and the crud in the high temperature and high pressure water that flows into the lower part of the canister from the inflow valve 5 is
It is usually a ferromagnetic or paramagnetic material, so that it is magnetically captured by the steel wool during its passage through the matrix 2. In particular, since the magnetic force is large at the tip, extremely fine particles and paramagnetic particles also adhere to it. The filtered water from which the crud has been removed passes through a space 11 on the outflow side of the canister 1 and returns to the system from the top through an outflow path 10 where an outflow valve 6 is located. Reference numeral 7 in the figure indicates a flush valve connected to the lower part of the canister, which is installed in a bypass flow path 13 branched to the inflow path 9 and is provided as a quick-opening valve. It can also be provided in Reference numeral 8 denotes a bypass valve of the electromagnetic filter, which is provided in a bypass flow path 14 connected between an inflow path 9 and a filtrate outflow path 10.

Note that the inflow path 9 and the water outflow path 10 are the canister 1.
It is also possible to arrange the valve in the opposite manner to the illustrated example, or to use a throttle mechanism such as a fixed three throttles such as an orifice, a variable throttle, a float valve, or a bellows in the flash valve 7 which is operated by rapidly opening the valve. A pressure opening/closing mechanism is selected and used. However, during the filtration action in the electromagnetic filter, the inflow valve 5
and the outflow valve 6 is open, the flush valve 7 and the bypass valve 8 are operated closed, and the electromagnetic coil 4 in the canister 14 is energized.

On the other hand, when cleaning is performed, first the bypass valve 8 is opened, the outflow valve 6 is closed, and then the inflow valve 5 is closed, and the current supply to the coil is stopped. As a result, the high temperature and high pressure water is bypassed from the bypass passage 14, and the high temperature and high pressure water is maintained inside the canister. When the flush valve 7 is suddenly opened in such a state, the high-temperature, high-pressure water in the canister 1 is rapidly decompressed, the saw part evaporates, and its volume expands, and the water in the upper part of the matrix quickly flows down inside the matrix. Therefore, the crud adhering to the matrix 2 is efficiently cleaned and discharged. According to experiments, 1
If the temperature is 60°C and high pressure water is higher than 6k9fId, a sufficient cleaning flow rate can be obtained in the matrix.
Even at 130°C and 3k9f1c, a considerable cleaning effect was obtained. In this case, the amount of water required for washing is usually sufficient if the amount is equal to the matrix volume;
If ~3 times the amount is used, a complete cleaning effect can be obtained in most cases, and the space 11 can be made to use a larger amount. In order to provide the required cleaning flow rate within the matrix 2, it can be easily controlled by the flush valve 7 or a throttling mechanism, such as an orifice, provided in series therewith. Therefore, in an electromagnetic filter using this cleaning method, the volume from the top of the matrix to the outflow valve 6 must be at least 1 times the matrix volume, and usually 2 to 3 times or more to ensure safety. is required.

The bulk of this volume may be contained within the canister, or in the piping leading from the top of the canister to the outflow valve 6. In the example shown in the figure, the filtration direction is upward flow, but this cleaning method can also be applied even if the filtration direction is downward flow, in which case the valve arrangement is upside down,
It is sufficient to hold the required volume in the lower part of the matrix. In addition, the water supply and drain systems for thermal power generation, and the water supply and door water systems for nuclear power generation are all high-temperature, high-pressure water exceeding 160°C and 5K9F1C, and high-gradient electromagnetic filters are installed in such systems. This means that water systems can be purified efficiently.
This results in increased power generation efficiency.

The present invention has a space at least equal to or larger than the volume of the matrix on the outflow side of the matrix of an electromagnetic filter used for high-temperature/high-pressure water systems, and has a quick-open valve that can be opened and closed freely on the inflow side of the matrix. Overwork can be carried out efficiently, and sufficient cleaning can be performed by effectively using the energy of the water to be treated, and there is no need to use other cleaning sources such as air, steam, nitrogen gas, etc. Therefore, they do not require cleaning equipment ι. However, the amount of water used for cleaning is extremely small, water loss due to cleaning is small, cleaning wastewater is easy to treat, and the cleaning operation is extremely simple. Therefore, it is easy to fully automate it, and it has the advantage of requiring no effort for maintenance and management.

[Brief explanation of the drawing]

The drawings are system explanatory diagrams showing embodiments of the present invention. 5...Canister, 2...Matrix, 3...Water partition, 4...Electromagnetic coil, 5...Inflow valve, 6 ...Outflow valve?・・・・・・Flush valve, 8 ・・・・・・
・Bypass valve, 9...Inflow path, 10...
... Outflow channel, 11, 12... Space.

Claims (1)

[Scope of Claims] 1. An electromagnetic filtration machine used for high-temperature, high-pressure water systems has a matrix on the outflow side of filtrate water that has at least a space larger than the volume of the matrix, and has a quick-open valve that can be opened and closed freely on the inflow side of the matrix. Features an electromagnetic filter. 2. The electromagnetic filter is composed of a canister, and the pressure of the high temperature and high pressure water system is 130°C and 3 kgf/cm^.
The electromagnetic filter according to claim 1, comprising two or more inflow passages. 3. The electromagnetic filter according to claim 1 or 2, wherein the filtrate outflow side space of the matrix is at least 2 to 3 times the volume of the matrix. 4. The quick-open valve according to claim 1, 2, or 3, wherein the quick-opening valve is connected to an inflow path on the inflow side of the matrix, and is equipped with a throttle mechanism. Electromagnetic filter. 5. The electromagnetic filtration machine is equipped with flowing water piping with valves on the inflow side and the filtrate outflow side, and is attached with a piping system in which both flowing water piping systems are connected by a bypass passage with a valve. An electromagnetic filter according to claim 2, 3, or 4.