RU2789413C1 - Method for anti-scale treatment of hot water and steam boilers and device for its implementation - Google Patents

Abstract

FIELD: water systems treatment.

SUBSTANCE: inventions group relates to the reagentless treatment of water systems and can be used in thermal power engineering to prevent the formation of scale on the surfaces of steam and hot water boilers. The device for antiscale treatment of hot water and steam boilers contains a flow boiler with a labyrinth-type heat exchanger and a water purity control sensor, and a control panel. A vibro-impact hammer is installed on the boiler wall between the labyrinth heat exchangers. An ultrasonic generator is installed on at least one heat exchanger. The water purity control sensor is located behind the heat exchangers along the water flow in the boiler and is connected to the control panel. The control panel performs periodic and short-term switching on of the power supply of the vibro-impact hammer and the generator of ultrasonic vibrations. A resonant vibration is created in the system, which leads to the coagulation of substances dissolved in water in the form of suspension, removed by the movement of water in the process of convective heat exchange, and the destruction of scale on the surfaces of heat exchangers with precipitation into the boiler.

EFFECT: increasing the service life of hot water and steam boilers and reducing energy costs by improving the quality of anti-scale treatment of heat exchangers.

2 cl, 2 dwg

Description

SUBSTANCE: inventions relate to reagentless treatment of water systems and can be used in thermal power engineering to prevent scale formation on the surfaces of steam and hot water boilers.

A known method of protecting and cleaning the internal surfaces of water heaters, steam, hot water boilers from scale, including exposure to the ferromagnetic surface of steam and/or water heating and/or heat exchange equipment of the effect of magnetostriction and at the same time on the supply pipeline of equipment for magnetic water treatment by an electromagnetic pulsed field by exposure to packs pulses with a frequency of 0.1-10 Hz (Patent RU No. 2167728 C1. Method for protecting and cleaning the surface of ferromagnetic materials from deposits. IPC: V08V 7/02, V08V 3/10, F28G 7/00. - Published on May 27, 2001) .

A known method of non-reagent treatment of water systems for the purpose of destruction and removal of scale in steam and hot water boilers, which consists in a complex effect on the system of magnetic and acoustic fields, while the water moving in the pipe is affected by a pulsed local magnetic field rotating 360 ° in planes parallel and perpendicular to the vector of the direction of water movement, and in the aquatic environment and the wall and scale excite acoustic waves, in the aquatic environment - infrasonic frequency, in the wall of the water system and scale - sound.

A device for implementing the method is known, containing a magnetoacoustic emitter with a control system, formed by a magnetic circuit and installed at a distance from each other by the main magnetizing coil, a compensating coil with coaxially located cores, as well as a toroidal magnetic field shift coil wound on an annular core located around the main part of the magnetic circuit between the main magnetizing and compensating coils. At the same time, the cores of the main magnetizing and compensating coils are made with the possibility of contact with the supply pipe of the processed water pipeline, and the magnetic circuit of the magnetoacoustic emitter is formed by the main part of the magnetic circuit and the cores of the main magnetizing and compensating coils, ensuring the contact of the magnetic circuit with the supply pipe of the processed water pipeline with the supply pipe of the processed water pipeline. water system (Patent RU No. 2312290 C2. A method of magnetoacoustic treatment of water systems and a device for its implementation. IPC: F28G 7/00, B08B 7/02, B08B 3/12. - Published on 10.12.2007).

A method is known to prevent the formation of scale in heating pipes of hot water and steam boilers made of an iron-containing alloy and in contact with a steam-water medium from which scale can form, including applying a current-carrying electrical potential in the range from 61 V to 150 V to the specified metal surface to neutralize electrostatic component of the adhesion force between the specified metal surface and colloidal particles and scale-forming ions (Patent RU No. 2503747 C2. Method for preventing scale formation in heating pipes of hot water and steam boilers. IPC: C23F 14/00. - Published on 10.01.2014).

A known installation for anti-scale treatment of water systems, containing the main pipeline of the water system and the bypass pipeline with a device for magnetic processing, is equipped with a resonator tank of the in-line type and a generator of non-sinusoidal electromagnetic oscillations installed on the resonator tank (Patent RU No. 2185335 C1. Installation for anti-scale treatment water systems, IPC: C02F 1/48, C02F 103/02 - Published 07/20/2002). This setup is taken as a prototype.

A common disadvantage of the known technical solutions is the relatively low efficiency of anti-scale treatment of the inner surface of the heating pipes of hot water and steam boilers, which requires significant energy consumption.

The technical objective of the invention is to improve the quality of the anti-scale treatment of the inner surface of the heating pipes of hot water and steam boilers and reduce energy consumption by periodic and short-term impacts on the surface of the boilers with vibro-impact and additional ultrasonic vibrations.

The technical result achieved by the claimed invention is to increase the service life of hot water and steam boilers and reduce energy costs by improving the quality of anti-scale treatment of heat exchangers.

The indicated technical result is achieved by the fact that in the known method of anti -naking processing of hot water and steam boilers, which consists in the effect of the acoustic field water system, according to the proposed technical solution, the boiler wall periodically and briefly affects the solid body with vibrouders, causing sound vibrations, and on heat exchangers. - additional ultrasonic vibrations that create resonance vibration of the water heating system with the shock forces, leading to the coagulation of substances dissolved in water in the form of a suspension, removed by the movement of water during convection heat transfer, and the destruction of scale on the surfaces of heat exchangers with loss in the boiler.

The specified technical result is achieved by the fact that in a known device for anti-scale treatment of hot water and steam boilers, containing a flow boiler with a labyrinth-type heat exchanger and a water purity control sensor, and a control panel, according to the proposed technical solution, a vibro-impact hammer is installed on the boiler wall between the labyrinth heat exchangers and , at least one heat exchanger is equipped with an ultrasonic generator, and the water purity control sensor is located behind the heat exchangers in the direction of water flow in the boiler.

The analysis of the prior art provided by the applicant made it possible to establish that there are no analogues characterized by sets of features identical to all the features of the claimed method of anti-scale treatment of hot water and steam boilers and devices for its implementation. Therefore, the claimed technical solutions meet the condition of patentability "novelty".

The results of the search for known solutions in this field of technology in order to identify features that match the distinguishing features of the prototype of the proposed technical solutions showed that they do not follow explicitly from the prior art. From the level of technology determined by the applicant, the popularity of the influence of the claimed technical solutions of the transformation provided for by the essential features of the transformation on the achievement of the specified technical result has not been revealed. Therefore, the claimed technical solutions meet the condition of patentability "inventive step".

The inventive method of antiscale treatment of hot water and steam boilers and the device for its implementation can be used (reproduced) in the thermal power industry when preparing steam or heating water for heating systems. Therefore, the claimed technical solutions meet the condition of patentability "industrial applicability".

In FIG. 1 shows a general view of the boiler in longitudinal section, in Fig. 2 - the same, in cross section.

The essence of the method of anti-scale treatment of hot water and steam boilers lies in the fact that the surface of the boiler is periodically and briefly affected by vibration shocks of a solid body, causing sound vibrations, and heat exchangers - by additional ultrasonic vibrations, creating with vibration shocks a resonant vibration of the water heating system, leading to coagulation of dissolved in water of substances in the form of a suspension removed by the movement of water in the process of convective heat transfer, and the destruction of scale on the surfaces of heat exchangers with precipitation into the boiler.

The device for anti-scale treatment of hot water and steam boilers contains a flow boiler 1 with at least one labyrinth heat exchanger 2 and a water purity control sensor 3 located behind the heat exchanger 2 along the water flow in the boiler 1. (Fig. 1). A vibro -gate hammer 4 is installed on the boiler wall between the labyrinth heat exchangers 2. At least one heat exchanger 2, an ultrasonic generator is installed 5. The device contains a remote control 6 associated with a vibration -made hammer 4, ultrasonic generator 5 and a sensor 3 control of water purity. (Fig. 2).

The inventive method of antiscale treatment of hot water and steam boilers is carried out as follows.

Simultaneously with the impact on the water system of acoustic fields, the wall of the boiler is periodically and briefly affected by vibration impacts of a solid body, causing sound vibrations, and heat exchangers - by additional ultrasonic vibrations, creating with shock forces a resonant vibration of the water heating system, leading to coagulation of substances dissolved in water into in the form of a suspension removed by the movement of water in the process of convective heat transfer, and the destruction of scale on the surfaces of heat exchangers with precipitation into the boiler.

The inventive device for implementing the method of antiscale treatment of hot water and steam boilers works as follows.

Installed on the wall of the flow boiler 1 behind the labyrinth heat exchanger 2 in the course of the water flow in the boiler 1 sensor 3 control of water purity controls the state of the output water and transfers its parameters to the remote control 6 of control and power. Periodically, as the water is contaminated, the sensor 3 transmits the signal to the remote control 6 to turn on the power to the vibration ground hammer 4 and the generator 5 ultrasound vibrations for antinathema treatment of the water heating system. At the same time, for a short time, 10-12 with the battleship of a vibration-made hammer 4 with a frequency of strikes 50-500 Hz on the surface of the boiler 1 wall causes sound vibrations, and the generator 5-ultrasonic vibrations with a frequency of 22,000 Hz, at the same time create resonant vibration by the water system leading to destruction The scale on the surfaces of heat exchangers 2 and the coagulation of substances dissolved in water, which are removed by the water movement during convective heat transfer with loss in the boiler 1.

Assessment of the effectiveness of the method of anti-nacqued treatment was carried out on the simultaneously working two identical steam boilers De-25-24, located in one boiler room and parallel to the same pair of issuance. One of the boilers was equipped with an anti-scale treatment device, the other was operated as standard. To evaluate the effectiveness of the anti-scale treatment method, both boilers operated for three months with a single heat load. Based on the experimental data obtained, it can be concluded that the proposed method and device are effective in hot water and steam boilers, which increase the service life of hot water and steam boilers by preventing scale deposits on the inner surfaces of heat exchange pipes.

The proposed method and device for antiscale treatment of hot water and steam boilers make it possible to provide a given temperature regime of heating and reduce fuel consumption, significantly increasing the heat transfer coefficient and the efficiency of the boilers.

Assessment of the effectiveness of the method of ultrasound removal of scale deposits from the inner walls of heat exchangers was carried out by experiments. Two identical steam boilers De-25-24, located in the same boiler room and connected to the same water supply system, served as objects of research. One of the boilers was equipped with an anti -wound device, the other was operated in a standard configuration. During the experiments, the thermal load on both boilers was supported at the same level. To assess the effectiveness of the method of ultrasound removal of the pressure deposits from the inner walls of the heat exchangered pipes into the lower manifold of the radiation pipes of both boilers, light plastins made of the same metal as the collector were mounted. Previously, test plastins were weighed on the electronic weights of the VLT-150-P “Sartgogosm”, which made up: for the first boiler-320.43 g, for the second boiler-328, 63 g. Both boilers worked for three months with a lonely thermal load (boilers (boilers (boilers. are connected in parallel to the steam line). After the test term, the test-plastine from the collectors were extracted and, after drying in natural conditions, were re-weighed on the scales. The difference in the weight of test plastin was determined for both the first and the second boilers. The obtained values were compared with each other. It was determined that the mass of solid deposits on the test plate of the first boiler equipped with an anti-scale device is 10-13 grams less than on the test plate of the second boiler. Based on the experimental data obtained, it can be concluded that the proposed method is effective.

Claims (2)

1. The method of anti-scale treatment of water-heating and steam boilers, which consists in exposing the water system to acoustic fields, characterized in that the boiler wall is periodically and briefly affected by vibration hammer impacts that cause sound vibrations, and at least one heat exchanger is affected by additional ultrasonic vibrations that create resonant vibration of the water heating system, leading to coagulation of substances dissolved in water in the form of suspension, removed by the movement of water in the process of convective heat exchange, and the destruction of scale on the surfaces of heat exchangers with precipitation into the boiler. 2. A device for anti-scale treatment of hot water and steam boilers, containing a flow boiler with a labyrinth-type heat exchanger and a water purity control sensor, and a control panel, characterized in that a vibro-impact hammer is installed on the boiler wall between the labyrinth heat exchangers and an ultrasonic one is installed on at least one heat exchanger the generator, and the water purity control sensor is located behind the heat exchangers along the water flow in the boiler and is connected to the control panel, configured to periodically and briefly turn on the power supply of the vibro-impact hammer and the ultrasonic vibration generator.

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