CN111623646B

CN111623646B - Gas condensation method

Info

Publication number: CN111623646B
Application number: CN202010467293.XA
Authority: CN
Inventors: 汪闰红; 李华芳
Original assignee: Shanghai Shangyu Environmental Protection Technology Co ltd
Current assignee: Shanghai Shangyu Environmental Protection Technology Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2022-02-25
Anticipated expiration: 2040-05-28
Also published as: CN111623646A

Abstract

The invention discloses a gas condensation method, and relates to the technical field of gas condensation. The method comprises the following steps: installing temperature sensors on two sides of the drying oven and the demister, starting the variable hot air fan after the cold air circulation is started and the condensing chamber reaches the set temperature, and controlling the air quantity of the variable hot air fan to keep the outlet air of the condensing chamber at the set temperature; the cold air circulating fan and the variable hot air fan are controlled by a system PLC program, and the air quantity can be automatically adjusted. According to the invention, large-air-volume cold air is adopted to directly carry out heat convection with damp and hot air, so that the latent heat of condensation is completely recovered, and meanwhile, the evaporator is controlled to be at the optimal heat exchange temperature, so that the energy efficiency of the heat pump is improved.

Description

Gas condensation method

Technical Field

The invention relates to the technical field of gas condensation, in particular to a gas condensation method.

Background

Because the latent heat of condensation of the humid and hot air is far higher than the sensible heat of the humid and hot air, when the latent heat of the humid and hot air is recovered by a conventional heat pump, the problems of low condensation efficiency and incomplete dehumidification and heat exchange exist because of the limitation of hot air volume. Especially, when the return air temperature is high, the temperature of the evaporator is too high, and the efficiency of the heat pump is low. In order to solve the problems, the invention designs a method for condensing gas.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a gas condensation method, which adopts large-air-volume cold air to directly carry out heat convection with hot and humid air, thoroughly recovers latent heat of condensation, controls an evaporator to be at the optimal heat exchange temperature and improves the energy efficiency of a heat pump.

In order to achieve the purpose, the invention is realized by the following technical scheme: a method of gas condensation comprising the steps of: installing temperature sensors on two sides of the drying oven and the demister, starting the variable hot air fan after the cold air circulation is started and the condensing chamber reaches the set temperature, and controlling the air quantity of the variable hot air fan to keep the outlet air of the condensing chamber at the set temperature; the cold air circulating fan and the variable hot air fan are controlled by a system PLC program, and the air quantity can be automatically adjusted.

The utility model provides a gas condensing device, including the condensation chamber, the condensation chamber sets up on oven upper portion, the condensation chamber in be provided with the defroster, the defroster bottom is provided with the water collector, condensation chamber one side below is provided with variable cold air blower, the water collector links to each other with the comdenstion water discharge pipe, condensation chamber opposite side below is provided with one-way relief pressure valve, the defroster both sides set up and are provided with first temperature sensor and second temperature sensor respectively, condensation chamber one end is passed through cold wind circulating line and variable cold air blower and is linked to each other with the evaporimeter, the condensation chamber other end directly links to each other with the evaporimeter, the evaporimeter passes through the compressor and links to each other with the evaporimeter, the condenser passes through the expansion valve and links to each other with the oven, condenser passes through hot air circulating line and links to each other with the oven, oven below one side is provided with sludge discharge device.

Preferably, the demister is a wire mesh demister or an electrostatic demister.

Preferably, temperature sensors are also arranged on two sides of the oven.

Preferably, the condensing chamber directly cools and condenses the hot air by using cold air.

Preferably, the condensing chamber is combined with a demister to realize condensation and dehumidification of hot air.

The invention has the following beneficial effects:

1. utilize cold air directly to carry out the heat transfer condensation to hot humid air, because what adopt is gaseous direct contact convection heat transfer, therefore the heat transfer is fast, and is efficient, does not basically have the thermal loss, can all retrieve hot humid gas's condensation latent heat, and dehumidification effect is good.

2. The invention combines a demister (such as an electrostatic stainless steel wire mesh demister, and the moisture removal rate of water drops with the diameter of more than 5 microns is up to more than 99%).

3. The method for condensing the gas can ensure the heat exchange and dehumidification effects by controlling the amount of the hot air.

4. The gas condensation method can ensure that the heat pump evaporator is in the optimal heat exchange state by controlling the air quantity of the cold air circulating air, thereby realizing the optimal energy-saving effect.

Drawings

The invention is described in detail below with reference to the drawings and the detailed description;

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Referring to fig. 1, the following technical solutions are adopted in the present embodiment: a method of gas condensation comprising the steps of: installing temperature sensors on two sides of the drying oven and the demister, starting the variable hot air fan after the cold air circulation is started and the condensing chamber reaches the set temperature, and controlling the air quantity of the variable hot air fan to keep the outlet air of the condensing chamber at the set temperature; the cold air circulating fan and the variable hot air fan are controlled by a system PLC program, and the air quantity can be automatically adjusted.

The utility model provides a gas condensing device, including condensing chamber 1, condensing chamber 1 sets up on oven 16 upper portion, condensing chamber 1 in be provided with defroster 2, defroster 2 bottom is provided with water collector 3, 1 one side below of condensing chamber is provided with variable hot air blower 4, water collector 3 links to each other with comdenstion water discharge pipe 5, 1 opposite side below of condensing chamber is provided with one-way relief pressure valve 6, 2 both sides of defroster set up and are provided with first temperature sensor 7 and second temperature sensor 8 respectively, 1 one end of condensing chamber is passed through cold wind circulating line 9 and variable cold wind blower 10 and is linked to each other with evaporimeter 11, 1 other end of condensing chamber directly links to each other with evaporimeter 11, evaporimeter 11 passes through compressor 12 and links to each other with condenser 13, condenser 13 passes through expansion valve 14 and links to each other with evaporimeter 11, condenser 13 passes through heated air circulation pipe 15 and oven 16 links to each other, oven 16 below one side is provided with mud discharging equipment 17.

The demister 2 adopts a wire mesh.

Temperature sensors are also arranged on two sides of the oven 16.

The working principle of the invention is as follows: the hot and humid air condenses when cooled, and the condensation releases a large amount of heat. In the traditional heat pump drying process, a heat pump evaporator is adopted to directly cool damp and hot air, and the damp and hot air and a metal fin plate condenser are adopted to exchange heat (in a heat conduction mode), so that the problems of low heat exchange efficiency and incomplete condensation exist. And adopt the direct condensation high temperature humid and hot air of low temperature air, because what adopt is convection heat transfer, heat transfer speed is extremely fast, and the condensation is effectual, and the back is got rid of to a large amount of water smoke of production through the defroster, and it is efficient to dehumidify (the defroster comprises wire mesh, also can play the effect of condensation when hot-blast process).

This embodiment adopts low temperature cold wind direct cooling high temperature damp and hot air, belongs to the direct contact heat transfer, combines low temperature cold wind direct condensation high temperature damp and hot air and defroster, realizes quick cooling and high-efficient dehumidification. The heat pump heat recovery balance is realized by controlling the hot air inlet air quantity, the condensing system balance is realized by controlling the cold air circulating air quantity, the heat pump evaporator is in the best working state, and the system pressure balance is realized by the one-way pressure reducing valve.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A gas condensing device is characterized by comprising a condensing chamber (1), wherein the condensing chamber (1) is arranged on the upper part of an oven (16), a demister (2) is arranged in the condensing chamber (1), a water receiving disc (3) is arranged at the bottom of the demister (2), a variable hot air fan (4) is arranged below one side of the condensing chamber (1), the water receiving disc (3) is connected with a condensate water discharge pipeline (5), a one-way pressure reducing valve (6) is arranged below the other side of the condensing chamber (1), a first temperature sensor (7) and a second temperature sensor (8) are respectively arranged on two sides of the demister (2), one end of the condensing chamber (1) is connected with an evaporator (11) through a cold air circulating pipeline (9) and a variable cold air fan (10), the other end of the condensing chamber (1) is directly connected with the evaporator (11), the evaporator (11) is connected with a condenser (13) through a compressor (12), the condenser (13) is connected with the evaporator (11) through an expansion valve (14), the condenser (13) is connected with the oven (16) through a hot air circulating pipe (15), and one side below the oven (16) is provided with a sludge discharge device (17).

2. A gas condensing unit according to claim 1, characterized by the fact that the demister (2) is a wire mesh demister or an electrostatic demister.

3. A gas condensation device according to claim 1, characterised in that the oven (16) is also provided with temperature sensors on both sides.

4. A gas condensation device according to claim 1, characterised in that the condensation chamber (1) is cooled directly by cold air for condensation of hot air.

5. A gas condensing unit according to claim 1, characterized by the fact that the condensing chamber (1) is combined with a demister (2) to achieve condensation and dehumidification of hot air.