RU2193529C2 - Magnetic grid mud box - Google Patents

Abstract

FIELD: magnetic cleaning. SUBSTANCE: device is intended for eliminating polluting solids in the form of sludge and suspended particles from water-dispersion media transported over pipelines. Magnetic grid mud boxes are used in heat networks, heat points, boiler-houses, heat-and-power stations. Magnets attracting sludge from the water are mounted inside horizontal nonmagnetic pipes passing through casing. After removal of magnets from these pipes, attached to pipes sludge peels off onto bottom of mud box. Proposed construction does not contain upper cover and structures of bottom and drain filter are simplified. EFFECT: facilitated cleaning mud box. 2 dwg

Description

 The device is designed to eliminate mechanical impurities in the form of sludge and suspended particles from the water-dispersed medium transported through the pipeline. Magnetic-mesh mud collectors are used in heating networks, heating centers, boiler houses, and thermal power plants.

 Known magnetic activator (ed. St. 1337350, G 02 F), comprising a housing with a removable cover, two nozzles, in which the magnetic system is made in the form of blocks of magnets installed in several rows along the axis of the device.

 A permanent magnet type PMU apparatus is also known (Voykov Iron Foundry, Moscow).

 A device is known for magnetic processing of a water-dispersed medium transported through a pipeline (ed. St. 2132853, G 02 F), in which permanent ring magnets are grouped in the form of two sections interconnected by a flexible connection.

 Of the known devices designed for the magnetic treatment of the transported water-dispersed medium, the closest in technical essence is the apparatus for the magnetic treatment of liquids (ed. St. USSR N 633814, MKI G 02 V 9/00, publ. 26.11.78).

 The apparatus consists of a cylindrical housing with a multi-pole electromagnet placed on its axis located in the casing. The non-magnetic casing is made of foil, and one end of it is made in the form of a bellows. The device has a node pouring a conductive fluid.

 To clean existing devices from accumulated dirt, it is necessary to dismantle the cover (8-24 bolts) and pull out the magnet block from the housing (50 kg). Using compressed air, it is necessary to remove accumulated sludge from the magnets, which seems extremely inconvenient and time-consuming.

 The task to which the invention is directed is to simplify the design of the device and increase its operational properties by facilitating the process of cleaning the filter from mechanical impurities accumulated during operation.

 To achieve this technical result, i.e. facilitating the process of cleaning the mud sludge from dirt and sludge, in the proposed technical solution, magnets that attract sludge from water are installed in horizontal pipes of non-magnetic material that cross the body through. After removing the magnets from these pipes, the sludge magnetized to these pipes falls to the bottom of the sump. In the proposed design, there is no top cover and the design of the bottom and the mesh filter is simplified.

 The essence of the claimed invention is illustrated by the following graphic materials, in which Fig. 1 shows a magnetically-mesh sump (section AA in Fig. 2) and Fig. 2 is a side view.

 Magnetic-mesh sump consists of a cylindrical housing 1, equipped with inlet 2 and outlet 3 nozzles, nozzles for the release of dirt 4 (in the lower part of the housing) and the exhaust of air 5 (in the upper part of the housing). A partition 6 is installed inside the housing 1. Horizontal pipes 7 of non-magnetic material pass through the housing. Inside the pipes 7, electromagnet blocks 8 are installed. The mesh filter 9, located in the outlet pipe 3, prevents non-magnetic contaminants from entering the outlet pipe 3. The guides 10 serve to maximize the approximation of the fluid flow to the pipes with magnets.

 The device operates as follows.

 The flow of water passing through the inlet pipe 2 enters the body of the magnetic grid sump 1. Due to the expansion of the cross section, the flow rate of water decreases. The heaviest particles of dirt in the stream sink to the bottom of the magnetic grid sump. Next, a stream of water with the remnants of "light" particles of dirt, passing under the partition 6, enters the area of the housing 1, where the pipes of non-magnetic material 7 are located, in which there are blocks of magnets 8. Due to the magnetic field created by the blocks of magnets, the particles are magnetized to these pipes dirt with magnetic properties. Dirt particles of a non-magnetic nature are delayed by a strainer 9, which is located in the outlet pipe 3.

 The operation of the magnetic grid sump is controlled by two pressure gauges installed before and after the sump. The pressure drop in a clean (uncontaminated) magnetic-grid sump is not more than 0.05 kgf / cm. As the magnetic grid sump becomes contaminated, the pressure drop increases and at a value of 0.5 kgf / cm or more, the sump should be subject to cleaning.

 Cleaning the magnetic grid sump is as follows.

 First, the valves close before and after the sump. Further, blocks of magnets are pulled out of the pipes from non-magnetic steel, while the magnetic field that holds the sludge disappears, after which all the magnetic sludge falls to the bottom of the sump. Then open the pipe 4 to release dirt. After that, replace the strainer 9. After opening the valves before and after the sump, it is ready for further operation.

Claims (1)

 Magnetic mesh sump containing a housing with inlet and outlet nozzles, a strainer and magnet blocks, characterized in that the magnet blocks are placed in horizontal through pipes of non-magnetic material crossing the housing.

Images