CN102679763B - Steam and water mixing heater - Google Patents

Abstract

The steam-water mixing heater of the present invention is a novel heating device for directly mixing steam and water (or other liquids), and belongs to the field of heat exchange. In the present invention, a damping spring is added between the Rafal nozzle and the housing, and the vibration of the Rafal nozzle generated during the mixing process of steam and cold water is buffered by the damping spring to reduce the vibration of the housing . The central axis of the steam inlet is deviated from the central axis of the Rafal nozzle by a certain distance. After the steam enters, it avoids directly impacting the Rafal nozzle. The steam generates swirling flow inside, which reduces the vibration of the equipment, and the swirling steam passes through The heating of the small holes into the Rafal nozzle enhances the mixing of steam and cold water, allowing the steam and water to reach a homogeneous mix in less time.

Description

Soda Mixing Heater

technical field

The present invention belongs to the field of heat exchange, especially the field of heat exchange in which heat exchange media are in direct contact without chemical reaction with each other.

Background technique

The steam-water mixing heater is a new type of heating device that directly mixes steam and water (or other liquids). It uses steam to directly heat water (or liquids) to increase its temperature. Compared with other indirect heat exchange equipment, the steam-water mixing heater has the characteristics of high heat exchange efficiency, low noise, simple installation and low cost. It is the most ideal steam heating equipment in bath water supply, production and domestic hot water supply and hot water heating system. At the same time, it is widely used in the mixing and heating of fluids in food brewing, medicine, chemical industry, petroleum, rubber, papermaking and other industries.

When working, the heated water passes through the nozzle in the shape of a Rafal tube, and the steam is sprayed into the water from the side of the nozzle through many oblique small holes on the pipe wall, and the two are mixed instantaneously and well in high-speed flow to achieve the purpose of heating water .

Patent No.: ZL200720025883.7 and Patent No.: ZL201020648625.6 respectively describe steam mixing heaters, but current steam mixing heaters still have serious vibration and noise.

Contents of the invention

The purpose of the present invention is to provide a steam-water mixing heater with low noise, low vibration and high thermal efficiency.

The technical scheme adopted in the present invention is: a steam-water mixing heater, including a steam-water heating chamber, the shell of the steam-water heating chamber is respectively provided with a cold water inlet, a steam inlet and a hot water outlet, the cold water inlet and the hot water outlet It is connected through the Rafal nozzle. The outer wall of the Rafal nozzle is provided with numerous small heating holes. The Rafal nozzle is two top-to-top conical lumens. A damping spring and a sealing ring are arranged between the Farr nozzle and the housing, and the central axis of the steam inlet is offset from the central axis of the Rafal nozzle.

The beneficial effect of the present invention is: the present invention has added damping spring between Rafal nozzle and housing, the vibration of Rafal nozzle produced in steam and cold water mixing process is through the buffering effect of damping spring, Reduce the vibration of the shell. The central axis of the steam inlet is deviated from the central axis of the Rafal nozzle by a certain distance. After the steam enters, it avoids directly impacting the Rafal nozzle. The steam generates swirling flow inside, which reduces the vibration of the equipment, and the swirling steam passes through The heating of the small holes into the Rafal nozzle enhances the mixing of steam and cold water, allowing the steam and water to reach a homogeneous mix in less time.

Description of drawings

Fig. 1 is a schematic diagram of the mechanism of the present invention;

Fig. 2 is the A-A sectional view of the steam inlet of the present invention;

In the figure 1. Cold water inlet, 2. Seal ring, 3. Shock absorbing spring, 4. Shell, 5. Steam inlet, 6. Small heating hole, 7. Hot water outlet, 8. Rafal nozzle.

Detailed ways

As shown in Figure 1: a steam-water mixing heater, including a steam-water heating chamber, the casing of the steam-water heating chamber is respectively provided with a cold water inlet, a steam inlet and a hot water outlet, and the cold water inlet and hot water outlet pass through the The outer wall of the Rafal nozzle is provided with numerous small heating holes. The Rafal nozzle is two conical lumens facing each other. The Rafal nozzle at the cold water inlet and hot water outlet A damping spring and a sealing ring are arranged between the tube and the housing.

At present, the steam-water mixing heater has serious vibration and noise, which seriously affects the safety and health of the staff. Due to the severe vibration, the upstream and downstream pipelines often break, which stops the normal work of the factory. The vibration mainly occurs in steam and cold water. In the Rafal tube that is in direct contact with the mixture, although the steam scatters into the water from the heating holes with a small diameter, which reduces the large-area contact between the steam and the water, and reduces vibration and noise, this problem has not been completely solved. In this structure, a damping spring is added between the Rafal nozzle and the casing, and the vibration of the Rafal nozzle generated during the mixing process of steam and cold water is buffered by the damping spring to reduce the vibration of the casing .

As shown in Figure 2: the central axis of the steam inlet has a certain offset from the central axis of the Rafal nozzle.

At present, the steam inlet of the steam-water mixing heater is directly above the casing. When the steam enters and directly impacts the Rafal nozzle, it will also generate a lot of vibration and noise. The position of the steam inlet has been improved, and the steam inlet is offset from the center. After a certain distance, the steam avoids directly impacting the Rafal nozzle after entering, and the steam generates a swirl inside, which reduces the vibration of the equipment. The swirling steam enters the Rafal nozzle through the heating hole to enhance the steam and The mixing of cold water makes the steam and water reach the degree of uniform mixing in a shorter time.

Claims (1)

1. A steam-water mixing heater, comprising a steam-water heating chamber, the shell of the steam-water heating chamber is respectively provided with a cold water inlet, a steam inlet and a hot water outlet, and the cold water inlet and the hot water outlet pass through The outer wall of the Rafal nozzle is connected with numerous heating holes, and it is characterized in that: the Rafal nozzle is two conical lumens with the top to the top, and at the cold water inlet A damping spring and a sealing ring are arranged between the Rafal nozzle at the hot water outlet and the housing, and the central axis of the steam inlet is deviated from the central axis of the Rafal nozzle shift.