Low-pressure adsorption natural gas storage tank

Abstract

A low-pressure adsorption natural gas storage tank disclosed by the present invention is composed of a tank body and an external jacket, wherein the tank body is equipped with an air inlet, an air outlet, an inlet for activated carbon, an inlet for a phase change reaction agent, and a phase change reaction agent. Variable reaction agent outlet, the inside of the tank has an activated carbon partition layer and a stainless steel coil, the outer jacket is equipped with a circulating cooling water pipe, and is equipped with a water inlet and a water outlet. Equipped with a nano filter core with a special structure, the stainless steel coil is filled with a phase change reaction agent. A low-pressure adsorption natural gas storage tank of the present invention has a simple structure and is convenient to operate. The phase change reactant and external circulating cooling water are used to absorb and release heat inside the storage tank, which is beneficial to the adsorption and desorption reactions of natural gas. , to avoid reducing the adsorption and desorption of natural gas due to temperature.

Description

technical field [0001] The invention relates to the field of natural gas adsorption storage equipment, in particular to a low-pressure adsorption natural gas storage tank. Background technique [0002] Due to the huge consumption of coal, oil and other energy sources and the serious pollution they cause to the environment, it is imminent to develop and research new energy sources. Natural gas is an abundant clean energy source, and its combustion products are less polluting than those of coal and crude oil. Substituting gas for oil has become a trend. [0003] Natural gas technology applications mainly include liquefied natural gas (LNG), compressed natural gas (CNG), and adsorbed natural gas (ANG). Liquefied natural gas (LNG) is usually stored in cryogenic storage tanks in a liquefied state at 111.7K and 0.101325 Mpa. During use, there are problems such as high critical pressure, high operating costs, and large investment; compressed natural gas (CNG) is stored at 20 MPa ...

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Problems solved by technology

Liquefied natural gas (LNG) is usually stored in cryogenic storage tanks in a liquefied state at 111.7K and 0.101325 Mpa. During use, there are problems such as high critical pressure, high operating costs, and large investment; compressed natural gas (CNG) is stored at 20 MPa Natural gas is compressed and stored in a supercritical fluid state in a high-pressure bottle. At present, the use of natural gas for vehicles is relatively common, but there are problems in use such as high pressure, strict matching, multi-stage compression system, and many safety hazards; adsorbed natural gas ( ANG) is to achieve the storage capacity of compressed natural gas (13-14 Mpa) at a relatively low storage pressure (3-4 MPa) by means of the adsorption of the filled solid adsorbent in the storage tank, and the phase of adsorbed natural gas and compressed natural gas Compared with natural gas, it can increase the storage capacity of natural gas storage devices under the same conditions or significantly reduce the storage pressure while maintaining the same storage capacity. Therefore, the development and research of adsorbed natural gas (ANG) has become a current hot spot. also become a trend

[0004] However, the natural gas in ANG storage equipment is adsorbed on the adsorbent, which is easily affected by the thermal effect in the process of adsorption and desorption. The adsorption process is an exothermic reaction, which easily generates heat and raises the temperature of the entire environment of the storage equipment. While affecting the adsorption capacity of the adsorbent to natural gas, the desorption process is also an endothermic process, requiring more heat to desorb more natural gas from the adsorbent

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