Chemical and Petroleum Engineering, Vol. 54, Nos. 1–2, May, 2018 (Russian Original Nos. 1–2, Jan.–Feb., 2018)
0009-2355/18/0102-0038 ©2018 Springer Science+Business Media, LLC
Voronezh Institute of State Fire Service, Ministry of Emergency Situations of Russia, Voronezh, Russia; e-mail: email@example.com.
Translated from Khimicheskoe i Neftegazovoe Mashinostroenie, No. 1, pp. 28–29, January, 2018.
FIRE AND EXPLOSION SAFE TECHNOLOGY OF STORAGE
AND REGASIFICATION OF LIQUEFIED PETROLEUM GAS
S. A. Shevtsov, D. V. Kargashilov, and A. N. Shutkin
The technology of storage and regasiﬁ cation of liqueﬁ ed petroleum gas that implies storage in an isother-
mal tank and overheating the gas with subsequent supply of the vapor phase to the consumer is offered.
The necessary storage and regasiﬁ cation temperatures are achieved by means of utilizing a vapor-com-
pression refrigeration unit in the technological process. The technology allows to improve energy efﬁ ciency
of the processes, reduce ﬁ re-and-explosion hazard, minimize LPG losses, exclude conditions formation of
a combustible environment, regulate the storage temperature of LPG of various composition and efﬁ cien-
cy of the regasiﬁ cation process, and ensure the composition of volatilized LPG remains constant during
Keywords: liqueﬁ ed petroleum gas, isothermal storage, regasiﬁ cation, ﬁ re and explosion safety, vapor-
compression refrigeration unit, energy saving.
Limited reserves of natural energy resources, inaccessibility of new deposits, and increasing cost of energy carriers
make the use of liqueﬁ ed petroleum gas (LPG) promising. Advantages of LPG are high caloriﬁ c value, environmentally via-
ble combustion, convenience of storage and transportation in liqueﬁ ed form .
At present, in the world practice of gas supply to residential and industrial facilities remote from the main power
supply points, autonomous systems are increasingly being used to supply consumers with propane–butane mixtures from tank
units in which gas is stored in liqueﬁ ed form and is supplied as a gas by means of regasiﬁ cation .
In view of the proliferation and demand for autonomous gasiﬁ cation systems, one of the main tasks is to ensure
compliance with the technical regulations of ﬁ re safety requirements when operating LPG tank plants near residential areas
and recreational areas .
Analysis using a risk-based approach showed that the ﬁ re safety of autonomous gas-supply systems does not corre-
spond to the normative level [4, 5]. First of all, this is due to the fact that modern autonomous gas supply systems are equipped
with LPG storage tanks under excess operating pressure of 1.6 MPa. Tanks under high pressure are explosive, and they are
subject to increased safety requirements .
It is promising to store gas in a liqueﬁ ed state at a low temperature in isothermal steel or reinforced concrete insulating
tanks to reduce the number of events that can potentially trigger a ﬁ re and reduce the consequences of possible emergencies,
and thus to reduce ﬁ re risk to the required level of ﬁ re safety .
To solve this problem, a conceptual approach is proposed for organizing isothermal storage and regasiﬁ cation of LPG
using efﬁ cient heat pump technologies that allow to reduce the cost of energy production by utilizing schemes for connecting
the heat pump that are most rational in terms of energy. The basis of energy efﬁ ciency is the use of renewable energy sources.
In Russia, the established capacity of heat pump units (HPU) of all types does not exceed 65 MW, while the thermal
capacity of the world’s current heat pump ﬂ eet is 250 GW, so their introduction is topical .