CN103175360B - Injection type vacuum ice slurry preparation system - Google Patents

Abstract

The invention discloses a spray-type vacuum ice slurry preparation system, which includes a heating device, a heat exchanger, a steam injector, a vacuum tank, a steam-water series injector, a condenser, a working medium pump, a throttle valve, a regulating valve, a trap The water coil, nozzle, and heating device are connected to the heat exchanger through pipes; the steam-water series ejector is connected to the heat exchanger and the vacuum tank through pipes; the inlet of the steam ejector is connected to the heat exchanger through pipes, and the outlet of the steam ejector It is connected to the condenser through pipes, and the suction port of the steam ejector is connected to the water catch coil through pipes; the condenser is connected to the throttling device and the regulating valve through pipes; the throttling device is connected to the water catch coil through pipes; the regulating valve It is connected with the working medium pump through the pipeline; the working medium pump is connected with the heat exchanger through the pipeline; the upper part of the vacuum tank is provided with a nozzle, and the nozzle is located under the water catch coil; the lower part of the vacuum tank is provided with an ice slurry discharge port. The invention has the advantages of simple and convenient operation, high reliability, long service life and low energy consumption.

Description

A jet-type vacuum preparation system for ice slurry

technical field

The invention relates to a jet vacuum preparation system for ice slurry.

Background technique

Ice slurry refers to a solid-liquid two-phase suspension solution containing tiny ice crystal particles. Usually, the diameter of these ice crystal particles is tens to hundreds of microns. storage etc. The preparation methods of ice slurry mainly include fluidized bed method, vacuum method, scraping method, supercooled water method, direct contact method and so on. The principle of the vacuum method is to spray liquid water droplets in a vacuum container, and part of the droplets will flash and absorb heat at the same time, so that part of the droplets will solidify into ice crystals and mix with the remaining liquid water to form ice slurry. The process of ice slurry formation continues as long as the vacuum in the container is maintained. It can be seen that maintaining vacuum is particularly important for preparing ice slurry by vacuum method. At present, vacuum pumps are generally used to extract vacuum. Vacuum pumps have moving parts, which will wear and tear, and the vacuum degree will drop. The pump is also noisy, and consumes fuel and electricity. Vacuum pumps generally cannot pump condensable gases, and emulsification will occur. Although the water ring pump can directly pump water vapor, its vacuum degree is relatively low and it is relatively large. Therefore be badly in need of proposing a kind of novel energy-saving vacuum system that makes ice slurry.

Contents of the invention

The purpose of the patent of the present invention is to propose a jet-type vacuum preparation system for ice slurry, so as to solve the problems of difficulty in guaranteeing the vacuum degree, complex structure, and high energy consumption of the ice slurry produced by using a vacuum pump to form a vacuum.

In order to achieve the above object, the system for producing ice slurry by jet vacuum of the present invention includes a heating device, a heat exchanger, a steam ejector, a vacuum tank, a series ejector of steam and water, a condenser, a working medium pump, a throttle valve, and a regulating valve , water catch coil, nozzle, and heating device are connected to the heat exchanger through pipes; the steam-water series ejector is connected to the heat exchanger and the vacuum tank through pipes; the inlet of the steam ejector is connected to the heat exchanger through pipes, and the steam ejector The outlet of the steam ejector is connected to the condenser through the pipe, and the suction port of the steam ejector is connected to the water catch coil through the pipe; the condenser is connected to the throttling device and the regulating valve through the pipe respectively; the throttling device is connected to the water catch coil through the pipe; The regulating valve is connected to the working medium pump through the pipeline; the working medium pump is connected to the heat exchanger through the pipeline; the upper part of the vacuum tank is provided with a nozzle, and the nozzle is located under the water catch coil; the lower part of the vacuum tank is provided with an ice slurry discharge port.

As an improvement, the shape of the water catch coil is concentric circles with successively increasing diameters.

As a further improvement, the heating device is a solar heating device.

The advantages of the patent of the present invention are: (1) The steam ejector is used to suck water vapor and non-condensable gas to keep the vacuum of the vacuum tank, and the steam ejector is used to produce cooling capacity, no moving parts, easy operation and high reliability , long service life and low energy consumption. (2) The vacuum maintenance device adopts the combination of the water catch coil and the steam-water series ejector to better maintain the vacuum degree.

Description of drawings

Fig. 1 is a schematic diagram of a system for preparing ice slurry by jet vacuum method according to the present invention.

Figure 2 is a schematic diagram of the structure of the catch coil.

Detailed ways

The system for preparing ice slurry by jet vacuum will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the system for producing ice slurry by ejecting vacuum includes a heating device 2, a heat exchanger 7, a steam ejector 9, a vacuum tank 25, a steam-water series ejector 5, a condenser 14, a working medium pump 20, a throttling Valve 22, regulating valve 18, water catch coil 12, nozzle 24, heating device 2 are connected to heat exchanger 7 through pipeline 3; steam-water serial ejector 5 is connected to heat exchanger 7 and vacuum tank 25 through pipeline 4 and pipeline 6 respectively connected; the inlet of the steam ejector 9 is connected with the heat exchanger 7 through the pipe 8, the outlet of the steam ejector 9 is connected with the condenser 14 through the pipe 10, and the suction port of the steam ejector 9 is connected with the catch coil 12 through the pipe 11 Condenser 14 is connected with throttling valve 22 and regulating valve 18 through pipelines 16 and 15 respectively; Throttle valve is connected with catch coil 12 through pipeline 23; Regulating valve 18 is connected with working medium pump 20 through pipeline 17; The pump 20 is connected with the heat exchanger 7 through the pipeline 21; the nozzle 24 is arranged on the upper part of the vacuum tank 25, and the nozzle 24 is located under the water catch coil 12; the ice slurry discharge port 26 is arranged on the lower part of the vacuum tank 25.

Water enters the heating device 2 from the water inlet pipe 1, and becomes high-temperature and high-pressure water vapor after heating, and enters the heat exchanger 7 through the pipe 3 to exchange heat with the refrigerant, and the water vapor flowing out of the heat exchanger 7 enters the steam-water series injection through the pipe 4 The device 5 is used as working steam to suck water vapor and non-condensable gas in the vacuum tank 25, and the sucked gas enters the steam-water serial ejector through the pipeline 6 to keep the vacuum tank 25 in a vacuum state. The refrigerant flowing through the heat exchanger 7 enters the inlet of the steam ejector 9 through the pipe 8, and is used as working steam to suck the refrigerant in the water catch coil 12, and the water catch coil 12 is fixed in the vacuum tank 25 through the bracket 13, The refrigerant in the water catch coil 12 is continuously evaporated and then enters the suction port of the steam ejector 9 through the pipeline 11, and the two are mixed through the pipeline 10 to flow through the condenser 14, and after condensation, the refrigerant passes through the pipeline 15 and is divided into two branches. The flow is distributed through the regulating valve 18, and a part of the refrigerant enters the pipeline 17, and then flows into the heat exchanger 7 through the pipeline 21 under the action of the working medium pump 20 to participate in the cycle. The other part flows through the throttle valve 22 through the pipeline 16, and then flows into the catch coil 12 through the pipeline 23 to participate in circulation. The top of the vacuum tank 25 is also provided with a nozzle 24, and the water entering from the water inlet pipe 19 is sprayed into the vacuum tank 25 through the nozzle 24, and the bottom of the vacuum tank 25 is provided with an ice slurry outlet 26.

As shown in Figure 2, the shape of the catch coil is concentric circles with successively increasing diameters.

Claims (3)

1. A system for jetting vacuum preparation of ice slurry is characterized in that it comprises a heating device, a heat exchanger, a steam ejector, a vacuum tank, a steam-water series ejector, a condenser, a working medium pump, a throttle valve, and a regulating valve , water catch coil, nozzle, and heating device are connected to the heat exchanger through pipes; the steam-water series ejector is connected to the heat exchanger and the vacuum tank through pipes; the inlet of the steam ejector is connected to the heat exchanger through pipes, and the steam ejector The outlet of the steam ejector is connected to the condenser through the pipe, and the suction port of the steam ejector is connected to the water catch coil through the pipe; the condenser is connected to the throttling device and the regulating valve through the pipe respectively; the throttling device is connected to the water catch coil through the pipe; The regulating valve is connected to the working medium pump through the pipeline; the working medium pump is connected to the heat exchanger through the pipeline; the upper part of the vacuum tank is provided with a nozzle, and the nozzle is located under the water catch coil; the lower part of the vacuum tank is provided with an ice slurry discharge port. 2. A system for preparing ice slurry by jet vacuum according to claim 1, characterized in that, the shape of the water catch coil is concentric circles with successively increasing diameters. 3. The system for preparing ice slurry according to claim 1, wherein the heating device is a solar heating device.