Intelligently-controlled open type compression absorption heat pump system for water and waste heat recovery

Abstract

The invention provides an intelligently-controlled open type compression absorption heat pump system for water and waste heat recovery. An outlet of a gas pipeline is connected with a contact heat exchanger, a circulating solution pump I is arranged on a pipeline between an absorber and a solution heat exchanger, and a circulating solution pump II is arranged on a pipeline between a regenerator and the solution heat exchanger; and a temperature and humidity and/or pressure sensor is arranged at a gas outlet at the upper portion of the contact heat exchanger and used for detecting the temperature and humidity and/or pressure of exhausted gas, and the circulating solution pump I, the circulating solution pump II and the temperature and humidity and/or pressure sensor are in data connection with a controller. The controller automatically adjusts the compression power of the circulating solution pump I and the circulating solution pump II according to the detected temperature and humidity and/or pressure, so that the flow of absorption solutions entering the absorber and the regenerator is adjusted to meet the requirements of water vapor absorption and solution regeneration in gas, and the moisture content parameter of the gas outlet is further changed. The power of the circulating solution pump I and the power of the circulating solution pump II are controlled through the temperature and pressure of outlet gas of the contact heat exchanger, the flow of the solutions entering the absorber and the regenerator can be guaranteed, and then the absorption and regeneration effects are adjusted; and finally, the temperature and pressure parameters of the gas in the contact heat exchanger and the absorber are kept in a relative balance state, and the system has extremely high 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

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