CS275757B6 - Low pressure steam generating equipment - Google Patents

Abstract

Hot water is injected into the space of the low-pressure steam generator (2), where the safety valve (7) maintains the appropriate negative pressure, and is supplied via the first solenoid valve (5) from the hot water source. As a result of the sharp decrease in its pressure at the moment of injection into the space of the generator (2), the hot water is converted into low-pressure steam by the flow. The heating coil (3), located inside the steam generator (2), removes residual moisture from the low-pressure steam produced via the second solenoid valve (6) connected to the hot water supply pipe (1). The low-pressure steam is discharged from the generator (2) directly to the appliances, and from there via the same circuit back to the hot water source. Sensors (8, 9j, situated in the outlet pipe (4) of low-pressure steam, depending on its required parameters, control the electrovalves (5, 6) at the hot water inlets to the generator (2).

Description

The invention relates to a device for the current generation of low-pressure steam with an overpressure of up to 0.05 MPa.

The current production of low-pressure steam is carried out in steam boilers or in a steam generator. The method of producing low-pressure steam in steam boilers is complex, investment-intensive and operationally demanding, especially when most of the consumption and production of heat is realized by means of a water or hot water medium, respectively.

Another existing method of producing low-pressure steam is realized by means of steam generators, which are essentially heat exchangers, consisting of a jacket and separate inlets of heating and heated medium. In these steam generators, an approximately constant level of heated water and an approximately constant steam space above its surface are maintained. The supply of thermal energy by a (separate) heating medium (hot water, steam, etc.) increases the enthalpy of the heated water, which results in a gradual change of water to steam.

The disadvantages of this method of producing low-pressure steam in generators with separate heating and heating media are the long time required to convert water into steam, the need for large steam generators (resulting from a necessarily large heating surface), low thermal efficiency and separate chemical treatment. heated water. In general, for these reasons, this method of producing low-pressure steam is used in practice to a very limited extent.

The above-mentioned drawbacks are eliminated by a device for generating low-pressure steam up to an overpressure of 0.05 MPa according to the invention, connectable to a hot water source with a minimum temperature of 130 ° C, characterized in that the supply line from the hot water source is connected via a first solenoid valve to the current generator vessel low pressure steam with outlet pipe. A heating coil located inside the vessel of the jet generator is connected to the branch from the supply pipe via a second solenoid valve, leading back to the source of hot water. By means of a safety valve, a reduced overpressure corresponding to the temperature and pressure of the low-pressure steam is ensured in the vessel of the jet generator. A first heat and pressure sensor connected to the first solenoid valve and a second heat and pressure sensor connected to the second solenoid valve are located on the outlet pipe.

The advantage of the device for jet production of low-pressure steam according to the invention is its immediate - jet - development. Due to the fact that the performance of the device depends only on the parameters of the injected hot water, the weight of the current generator can be up to 80% lower than with a conventional heat exchanger. The device has a high thermal efficiency. The generated low-pressure steam is generated from the chemically treated water of the hot water system, which eliminates the need for separate chemical treatment of water. The application of low - pressure water vapor production by means of a jet generator provides low investment intensity, which is especially suitable for those users who realize the maximum production and consumption of heat in a hot water way and due to the need for additional heat consumption. My low pressure steam system would be forced to build adequate capacity for low pressure steam boilers.

The attached drawing shows a diagram of an apparatus for producing low-pressure steam by jet generation according to the invention.

Hot water (130 to 180 ° C) is fed through the supply line 7 to the jet generator 2. When hot water is injected into the space of the jet generator 2, its overpressure in its internal volume decreases sharply and the subsequent instantaneous conversion to low-pressure steam occurs. Residual moisture of the low-pressure steam is removed by a heating coil 3, which is built into the inner space of the jet generator-2. The low-pressure steam of the required parameters is discharged through the outlet pipe 4 to the place of consumption. The power of the current generator 2, which is not directly dependent

CS 275 757 B6 2 on the size of the inserted heating surface, but only on the temperature and overpressure of the supplied hot water, is regulated by a first solenoid valve controlled by a first sensor 8 (pressure heat) located in the outlet line 4 of low pressure steam from jet generator 2. The first solenoid valve the amount of injected hot water from the supply pipe 7 supplied to the generator 2.

The amount of hot water supplied to the heating coil 3, the heating surface of which serves only to remove residual moisture from the generated low-pressure steam, is regulated by a second solenoid valve 6. The operation of the second solenoid valve 6 is controlled by a second sensor 9 (pressure thermal) The required overpressure of the low-pressure steam is provided by a safety valve 7 fitted in the container body of the jet generator 2.

Claims (1)

PATENT CLAIMS Device for current generation of low-pressure steam up to an overpressure of 0.05 MPa, connectable to a hot water source with a minimum temperature of 130 ° C, characterized in that the supply pipe (1) from the hot water source is connected via a first solenoid valve (5) to the jet vessel. of a low-pressure steam generator (2) with an outlet pipe (4), while a heating coil (3) is connected to the branch from the supply pipe (1) via a second solenoid valve (6), located inside the vessel of the jet generator (2), leading back to the hot source water, wherein a safety valve (7) is connected to the vessel of the low-pressure steam generator (2) and a first heat and pressure sensor (8) connected to the first solenoid valve (5) and a second heat and pressure sensor ( 9) connected to the second solenoid valve (6) «