CN-121990636-A - Saline-alkali water treatment equipment applied to saline-alkali soil

CN121990636ACN 121990636 ACN121990636 ACN 121990636ACN-121990636-A

Abstract

The invention relates to saline-alkali water treatment equipment applied to saline-alkali soil, which comprises a heat energy unit, a falling film unit, a first container, a second container and a condensing unit. The heat energy unit comprises a photovoltaic plate and a heat exchange plate, and a heat exchange runner for circulating heating liquid is arranged in the heat exchange plate. The falling film evaporation unit comprises a shell, a water distribution groove and first heat exchange pipes, wherein the water distribution groove and the first heat exchange pipes are arranged in the shell, a plurality of water distribution holes are formed in the bottom of the water distribution groove at intervals, the first heat exchange pipes are arranged below the water distribution groove, and the first heat exchange pipes are communicated with the heat exchange flow channels. The first container is used for inputting saline alkali water into the water distribution groove, the second container is connected with the shell, and the second container is used for collecting concentrated saline alkali water. The condensing unit is communicated with the shell and is used for condensing the water vapor. The device is beneficial to reducing the electric energy consumption during evaporation and concentration treatment and reducing the treatment cost. The saline and alkaline water drops on the first heat exchange tube, and the saline and alkaline water forms extremely thin water film on the first heat exchange tube, so that the treatment efficiency is improved.

Inventors

ZOU XIANGBO
RAO MUMIN
CHEN GONGDA
MA DEQUN
KUANG CAO

Assignees

广东能源集团科学技术研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20260211

Claims (10)

1. Saline-alkali water treatment equipment applied to saline-alkali soil, which is characterized by comprising: The heat energy unit comprises a photovoltaic plate and a heat exchange plate arranged on the back surface of the photovoltaic plate, and a heat exchange runner for circulating heating liquid is arranged in the heat exchange plate; The falling film evaporation unit comprises a shell, a water distribution groove and first heat exchange tubes, wherein the water distribution groove and the first heat exchange tubes are arranged in the shell, a plurality of water distribution holes are formed in the bottom of the water distribution groove at intervals, a plurality of first heat exchange tubes are arranged below the water distribution groove and correspond to the water distribution holes one by one, the first heat exchange tubes are bent at 180 degrees, bent sections of the first heat exchange tubes are positioned below the corresponding water distribution holes, ports of the first heat exchange tubes face downwards, and two ends of the first heat exchange tubes are respectively communicated with an inlet end and an outlet end of a heat exchange runner; The first container is used for storing saline-alkali water from saline-alkali soil, is communicated with the water distribution groove and is used for inputting the saline-alkali water into the water distribution groove; The second container is communicated with the shell, the saline-alkali water drops to the surface of the first heat exchange tube through the water distribution hole, concentrated saline-alkali water is evaporated and concentrated to form concentrated saline-alkali water, and the concentrated saline-alkali water is collected by the shell and then is input into the second container; and the condensing unit is communicated with the shell, and water vapor formed after the saline-alkali water is evaporated is input into the condensing unit and is used for condensing the water vapor.
2. The saline-alkali water treatment equipment applied to saline-alkali soil according to claim 1, wherein a plurality of annular grooves are formed in the outer wall of the first heat exchange tube, and the grooves are distributed at intervals along the axial direction of the first heat exchange tube.
3. The saline-alkali water treatment equipment applied to saline-alkali soil according to claim 1, wherein the outer wall of the first heat exchange tube is provided with a groove which is spiral.
4. The saline-alkali water treatment equipment for saline-alkali soil according to claim 1, wherein the falling film evaporation unit further comprises a liquid inlet collecting pipe communicated with the outlet end of the heat exchange flow channel and a liquid outlet collecting pipe communicated with the inlet end of the heat exchange flow channel, the liquid inlet collecting pipe and the liquid outlet collecting pipe are arranged outside the shell, and two ends of the first heat exchange pipe penetrate through the bottom of the shell and are respectively connected with the liquid inlet collecting pipe and the liquid outlet collecting pipe.
5. The saline-alkali water treatment equipment applied to saline-alkali soil according to claim 1, wherein the falling film evaporation unit further comprises plugs capable of being lifted, each water distribution hole is correspondingly provided with one plug, the inner wall of the water distribution hole and the outer wall of the plug are spherical, and the plugs are selectively inserted into the water distribution holes.
6. The saline-alkali water treatment apparatus for saline-alkali soil according to claim 1, wherein an outer surface of the first heat exchange tube is coated with a hydrophilic coating.
7. The saline-alkali water treatment equipment for saline-alkali soil according to any one of claims 1 to 6, wherein the condensing unit comprises a front-stage condensing device, a rear-stage condensing device and a cold source circulating device, the front-stage condensing device is connected with the shell, the rear-stage condensing device is connected with the front-stage condensing device, the rear-stage condensing device is positioned at the downstream of the front-stage condensing device, the front-stage condensing device and the rear-stage condensing device are both connected with the cold source circulating device, the water vapor in the front-stage condensing device exchanges heat with the cold source circulating device, and the water vapor in the rear-stage condensing device exchanges heat with the cold source circulating device.
8. The saline-alkali water treatment equipment for saline-alkali soil according to claim 7, wherein the front-section condensing device comprises a first box body and a second heat exchange tube arranged in the first box body, the second heat exchange tube is bent back and forth, an inlet end of the second heat exchange tube is communicated with the shell, an outlet end of the second heat exchange tube is communicated with the rear-section condensing device, an air inlet and an air outlet are formed in the first box body, the cold source circulating device comprises a fan, the fan is arranged on the box body and used for driving air to flow from the air inlet to the air outlet, and the air flows through the surface of the second heat exchange tube.
9. The saline-alkali water treatment equipment applied to saline-alkali soil according to claim 7, further comprising a third container, wherein the rear-section condensing device comprises a plurality of plate heat exchangers, a plurality of condensing channels and refrigerant channels are arranged in the plate heat exchangers, the refrigerant channels are distributed in a staggered mode with the condensing channels, the inlet end of each condensing channel is communicated with the front-section condensing device, the outlet end of each condensing channel is communicated with the third container, liquid water formed after water vapor is condensed is input into the third container, and two ends of each refrigerant channel are communicated with the cold source circulating device.
10. The apparatus according to claim 9, wherein the plate heat exchanger includes a housing, a partition plate, a baffle plate and a corrugated plate, two partition plates are disposed in parallel and at intervals in the housing, two partition plates divide an inner space of the housing into a middle chamber and end chambers disposed at opposite ends of the middle chamber, a baffle plate is disposed in the end chambers, the baffle plate divides the end chambers into a first distribution chamber and a second distribution chamber, the two first distribution chambers are respectively communicated with the front-stage condensing device and the third container, the two second distribution chambers are communicated with the cold source circulating device, a plurality of first distribution holes are disposed in the partition plate in the first distribution chamber in a penetrating manner, a plurality of second distribution holes are disposed in the partition plate in the second distribution chamber in a penetrating manner, a plurality of corrugated plates are disposed in the middle chamber in a spaced manner, the condensation channel or the condensation channel is formed between the two adjacent corrugated plates, the two second distribution chambers are respectively communicated with the first distribution holes and the second distribution channels are communicated with the refrigerant channels.

Description

Saline-alkali water treatment equipment applied to saline-alkali soil Technical Field The invention relates to the technical field of saline-alkali soil improvement, in particular to saline-alkali water treatment equipment applied to saline-alkali soil. Background The saline-alkali soil is salinized soil and alkalized soil formed by salinization or alkalization of soil, and the physical and chemical properties of the soil are changed due to the fact that the soil contains more saline-alkali components, and the saline-alkali soil is mainly characterized by soil hardening, poor structure, high PH value, lack of available nutrients and the like. Soil salinization seriously affects soil quality, so that the ecological environment of the soil is poor, biomass is reduced, and crop growth is limited. In the related art, saline-alkali components in soil are removed by means of rainwater infiltration, cofferdam infiltration and the like, and the saline-alkali components are dissolved in water to form saline-alkali water. The collected brine alkali is concentrated by evaporation so as to separate water in the brine alkali for reuse. When the saline-alkali water is evaporated, the saline-alkali water is intensively heated in a pipeline or a container. This approach requires a large consumption of electrical energy and is costly to process. And, in the evaporation process, part of the saline-alkali components are crystallized in a pipeline or a container, so that the cleaning is inconvenient, and the heat exchange efficiency is affected. Disclosure of Invention The invention aims to provide saline-alkali water treatment equipment applied to saline-alkali soil, which has low treatment cost and high treatment efficiency. To achieve the purpose, the invention adopts the following technical scheme: provided is a saline-alkali water treatment apparatus applied to a saline-alkali soil, comprising: The heat energy unit comprises a photovoltaic plate and a heat exchange plate arranged on the back surface of the photovoltaic plate, and a heat exchange runner for circulating heating liquid is arranged in the heat exchange plate; The falling film evaporation unit comprises a shell, a water distribution groove and first heat exchange tubes, wherein the water distribution groove and the first heat exchange tubes are arranged in the shell, a plurality of water distribution holes are formed in the bottom of the water distribution groove at intervals, a plurality of first heat exchange tubes are arranged below the water distribution groove and correspond to the water distribution holes one by one, the first heat exchange tubes are bent at 180 degrees, bent sections of the first heat exchange tubes are positioned below the corresponding water distribution holes, ports of the first heat exchange tubes face downwards, and two ends of the first heat exchange tubes are respectively communicated with an inlet end and an outlet end of a heat exchange runner; The first container is used for storing saline-alkali water from saline-alkali soil, is communicated with the water distribution groove and is used for inputting the saline-alkali water into the water distribution groove; The second container is communicated with the shell, the saline-alkali water drops to the surface of the first heat exchange tube through the water distribution hole, concentrated saline-alkali water is evaporated and concentrated to form concentrated saline-alkali water, and the concentrated saline-alkali water is collected by the shell and then is input into the second container; and the condensing unit is communicated with the shell, and water vapor formed after the saline-alkali water is evaporated is input into the condensing unit and is used for condensing the water vapor. In one embodiment, a plurality of annular grooves are formed in the outer wall of the first heat exchange tube, and the grooves are distributed at intervals along the axial direction of the first heat exchange tube. In one embodiment, the outer wall of the first heat exchange tube is provided with a groove in a spiral shape. In one embodiment, the falling film evaporation unit further comprises a liquid inlet collecting pipe communicated with the outlet end of the heat exchange flow channel and a liquid outlet collecting pipe communicated with the inlet end of the heat exchange flow channel, the liquid inlet collecting pipe and the liquid outlet collecting pipe are arranged outside the shell, and two ends of the first heat exchange pipe penetrate through the bottom of the shell and are respectively connected with the liquid inlet collecting pipe and the liquid outlet collecting pipe. In one embodiment, the falling film evaporation unit further comprises plugs capable of being arranged in a lifting mode, each water distribution hole is correspondingly provided with one plug, the inner wall of each water distribution hole and the outer wall of each plug are in a spherical shape matched with each o