An intelligently controlled water and waste heat recovery open compression absorption heat pump system

Abstract

The invention provides an intelligently controlled open compression absorption heat pump system for recovery of water and waste heat. The outlet of the gas pipeline is connected to a contact heat exchanger. A circulating solution pump II is installed in the pipeline between the heat exchanger and the solution heat exchanger; a temperature, humidity and / or pressure sensor is installed at the gas outlet on the upper part of the contact heat exchanger to detect the temperature, humidity and / or pressure of the discharged gas, and the circulation The solution pump I, the circulating solution pump II, temperature and humidity and / or pressure sensors are connected to the controller for data, and the controller automatically adjusts the compression power of the circulating solution pump I and the circulating solution pump II according to the detected temperature, humidity and / or pressure , so as to adjust the flow rate of the absorption solution entering the absorber and regenerator to meet the requirements for water vapor absorption and solution regeneration in the gas, and then change the moisture content parameter of the gas outlet. The present invention controls the power of the circulating solution pump I and the circulating solution pump II through the temperature and pressure of the outlet gas of the contact heat exchanger, so as to ensure the flow of the solution entering the absorber and the regenerator, and then adjust the absorption and regeneration effects, and finally make the The temperature and pressure parameters of the gas in the contact heat exchanger and the absorber maintain a relatively balanced state, which has strong engineering practical significance.

Description

technical field [0001] The invention belongs to the technical fields of heat exchange, waste heat utilization and environmental protection, and relates to an open compression absorption heat pump system for intelligently controlled water and waste heat recovery. Background technique [0002] High-temperature and high-humidity gases widely exist in various industries, including high-temperature and high-humidity air, desulfurization flue gas, and high-humidity gas. Taking a 600MW coal-fired boiler as an example, the water vapor content in the discharged wet flue gas is about 230t / h, which will cause the loss of a large amount of water resources. At the same time, water vapor droplets form condensation cores when they are discharged, which will promote the formation of smog under certain meteorological conditions. On the other hand, the flue gas at 50°C is a kind of waste heat. Although its energy quality is low and its density is small, the total amount is relatively large, ...

AI Technical Summary

Problems solved by technology

[0006] But this application still has the following problems: 1. After the pressurized flue gas is contacted for heat exchange, the flue gas is still in a saturated state, and more water is still released to the environment, resulting in waste of moisture and latent heat of vaporization; 2. After pressurized contact heat exchange, the circulating water temperature is still low, resulting in poor subsequent energy use; 3. Saturated water vapor directly enters the expander turbine, and the pressure release process The temperature of the medium water vapor decreases, resulting in droplets of condensation, and the water in the turbine will seriously reduce the power, and even cause the blades to break

4. The degree of intelligent control for new improvements needs to be improved

Images