SU939432A1

SU939432A1 - Device for supplying heat carrier to autoclaving chamber

Info

Publication number: SU939432A1
Application number: SU802973245A
Authority: SU
Inventors: Виктор Павлович Абрамов; Виктор Васильевич Шмалько; Виктор Петрович Виноградов; Андрей Григорьевич Овчаренко; Вячеслав Григорьевич Бобылев; Александр Романович Соловьянчик; Борис Митрофанович Куликов; Вадим Леонидович Бурнштейн
Original assignee: Днепропетровский Филиал Научно-Исследовательского Института Строительного Производства Госстроя Усср
Priority date: 1980-08-06
Filing date: 1980-08-06
Publication date: 1982-06-30

Description

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Изобретение относитс к строительству и может быть использовано на предпри ти х по изготовлению бетонных и железобетонных изделий в пропарочных камерах.The invention relates to construction and can be used in enterprises for the manufacture of concrete and reinforced concrete products in steam curing chambers.

Известно устройство дл подачи теплоносител в пропарочную камеру, включающее диффузор, сопло с отражателем и форсунку-увлажнитель 1.A device for supplying coolant to the steam chamber includes a diffuser, a nozzle with a reflector and a nozzle-humidifier 1.

Недостатком данного устройства вл етс то, что форсунка располржена над соплом, что не обеспечивает мелкодисперсного :распыла воды, чему не способствует также всасываема в диффузор паровоздушн-а смесь, имеюща скорость в районе форсунки несколько метров в секунду. В результате значительна часть воды, впрыскиваема форсункой в диффузор, после выхода из него не увлекаетс паровоздушными потоками в камере, а оседает на дно камеры. Кроме того, капли воды, разгон емые, в диффузоре, не успевают нагретьс проход щей через негоThe disadvantage of this device is that the nozzle is open above the nozzle, which does not provide a fine: spray of water, which is also not conducive to the mixture that is sucked into the vapor-air diffuser, having a speed in the area of the nozzle several meters per second. As a result, a significant part of the water injected by the nozzle into the diffuser, after exiting it, is not carried along by the vapor-air flows in the chamber, but settles to the bottom of the chamber. In addition, the water droplets accelerated in the diffuser do not have time to heat up passing through it.

паровоздушной смесью (врем пролета капель воды через диффузор составл ет сотые доли секунды), что снижает эффективность системы увлажнени . Наиболее близким к предлагаемомуvapor-air mixture (the time of flight of water droplets through the diffuser is hundredths of a second), which reduces the efficiency of the humidification system. Closest to the proposed

5 вл етс устройство дл подачи теплоносител в пропарочную камеру, включающее диффузор и соединенные между собой трубопроводы с соплами дл подачи воды и воздуха. За счет5 is a device for supplying a coolant to a steam chamber comprising a diffuser and interconnected pipelines with nozzles for supplying water and air. By

большой скорости истечени воздуха из сопда в верхней части диффузора создаетс разрежение, куда засасываетс тепловлаговоздушна смесь из пропарочной камеры. За воздушным соплом The high velocity of the outflow of air from the nozzle in the upper part of the diffuser creates a vacuum, where the heat-air-air mixture from the steam chamber is sucked. Behind the air nozzle

установлено сопло подачи воды, котора , смешива сь с подогретым воздухом , обр азует тепловлаговоздушную смесь, поступающую через диффузор в пропарочную камеру 2. a water supply nozzle was installed, which, mixing with heated air, forms a heat-air-air mixture entering through the diffuser into the steam chamber 2.

Claims

A disadvantage of the known device is that the water supply nozzle is installed behind the air supply nozzle. This means that the spray of water is located in the mixing zone of the heated air with the heat / air mixture absorbed from the steam chamber, i.e. in the deceleration zone of the air jet emanating from the nozzle. Consequently, such an arrangement of the water supply nozzle does not allow to achieve fine spray and, moreover, water droplets in the spray plume, the passage through the diffuser, do not have time to warm up to the temperature of the air supplied (usually the temperature of the water supplied to the chamber is 10-20 ° C, and heated air - 60-120 ° C). The purpose of the invention is to ensure uniformity of the coolant. The goal is achieved by the fact that the device for supplying coolant to the steam chamber, including a diffuser and interconnected pipes with nozzles for supplying water and air, is equipped with a divider made in the form of two cones, connected by bases and placed in the air inlet nozzle, the air supply pipeline is made with a spiral groove, and the water supply nozzle is installed tangentially to the surface of the air supply pipeline. As a result, a stream of water, falling from the nozzle into the spiral-shaped groove of the air pipeline, moves towards the air supply, heated by passing air. Then the water passes into the nozzle, where it spreads in a thin layer along its surface, and also heats up at the same time and accelerates its movement due to the high-speed air flow. After passing through the nozzle throat (section of the minimum gap), the air in the exit part of the nozzle accelerates to supersonic speeds. The shock waves arising in this part of the nozzle were crushed, water droplets to a fog-like state. Thus, in the mixing water, the water already falls into a finely dispersed form with a temperature close to the temperature of the heated air, forming with it a homogeneous in temperature, heat and moisture, air mixture. Figure 1 shows the proposed device, the cut; FIG. 2 is a section A-A in FIG. The device comprises a diffuser 1, in which there is an air supply nozzle 2 with a divider 3, an air conduit 4, a water conduit 5 and a water supply nozzle 6, which is integrated in the pre-cool part of the air conduit A, the inside of which is made with a spiral-shaped groove. The proposed device works as follows. Through an air duct, through the nozzle 2, the air supply to the diffuser 1 is supplied under a constant pressure by heated air, the temperature of which is regulated. The air flows out of the nozzle 2 at supersonic speed into the diffuser 1, as a result, a vacuum is formed in its upper part. Due to this, the heat-blowing mixture from the steam chamber is sucked into the diffuser 1, where it is mixed with the heated air flowing out of the nozzle 2, and is again fed into the steam chamber. To create a humid environment in the steam chamber, water is supplied through the water pipeline 5 through the nozzle 6 to the pre-suppy part of the air pipeline k, where it is heated along the spiral groove, is heated by accelerated air flow, and from the feed nozzle 2 enters the air diffuser 1 in fine form. Water and air at the exit of the air supply nozzle 2 form a heat-moisture air mixture, which, mixing with the heat-air-air mixture coming from the steam chamber, flows through the diffuser, maintaining the set temperature and humidity in the scope of the proposed device. Thus, the proposed device allows to create a heat-air-air environment in the steam chamber, the temperature and humidity of which can vary widely - from treating reinforced concrete products with dry air to contact wetting of the product surface with water supplied to the chamber in fine form. Apparatus of the Invention A device for supplying a heat transfer medium to a steam chamber, including a diffuser and interconnected pipelines with nozzles for supplying water and air, which, in order to ensure uniformity of the heat transfer medium, is provided with a divider connected to the base and placed in the air supply nozzle, and the air supply pipe is made with a spiral groove, the water supply nozzle being installed tangentially to the surface of the air supply pipe. 9 2 Sources of information taken into account during the examination 1. USSR Copyright Certificate No. 679555, cl. C B +1/30. 197B.

2. USSR author's certificate in application No. 28261 5 + / 33, class C 04 B 1/30, 1979 C prototype).

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