Gas-turbine-expansion installation for the compressed rock gas energy utilization

FIELD: power engineering; power generating installations.

SUBSTANCE: the invention is pertaining to the field of power engineering, in particular, to the power generating installations utilizing the energy of the overpressure of the rock gas with realization of the gas-turbine-expansion effect. The gas-turbine-expansion installation for utilization of the compressed rock gas energy contains in series mounted on the high-pressure rock gas mains: the electric heater for preheating of the gas; the turbo-expander kinematically linked with the electric power generator; the power storage battery with a capability of its recharge from the electric generator at the turbo-expander operation in the recharge mode and at connection to the heater in the initial moment of the installation operation with the subsequent switching-off from the heater at the turbo-expander reaching its operational mode. The electrical heater is the resistive heater and connected to the electric power generator through the control unit, which is electrically connected to the temperature sensing devices mounted on the inlet and the outlet of the turbo-expander. Utilization of the invention ensures simplification of the design chart of the power gas-turbine-expansion installation and the capability to regulate the preset temperatures of the gas at the inlet and the outlet of the turbo-expander.

EFFECT: the invention ensures simplification of the design chart of the power gas-turbine-expansion installation and the capability to regulate the preset temperatures of the gas at the inlet and the outlet of the turbo-expander.

2 cl, 2 dwg

 

The present invention relates to the field of energy, in particular power plants, utilizing the energy of the excess gas pressure with the implementation of the replacement effect, and can be used in terrestrial plants for the utilization of the potential energy of natural gas by reducing its pressure at gas distribution stations (GDS) and gas control points (GCP).

Known azotobacteria installation comprising a backbone of natural gas with high pressure and consistently established therein by the gas heating device and the expander, kinematically connected with the generator and gas turbine engine, the gas heating device made in the form of a heat exchanger-regenerator heated gas products of combustion of gas turbine engine [RF patent №2009389, F 17 D 1/04, 1994].

A disadvantage of the known device is the design complexity and the inability to adjust the heat supplied to the gas consumer reduced pressure.

As a prototype of the selected azotobacteria installations for the disposal of the energy of compressed natural gas containing successively installed on the highway of natural gas high pressure electric heater for heating gas and the turboexpander, Ki is tematicheskie associated with generator [RF patent №2221192, F 17 D 1/04, 2004].

A disadvantage of the known device is the design complexity and the inability to adjust the heat supplied to the gas consumer reduced pressure.

The main task to be solved by the invention is simple in design gazoturbostroenie installation with the possibility to adjust the set temperature of the gas at the inlet and outlet of the expander.

The problem is solved by the fact that azotobacteria installation comprising sequentially installed on the highway of natural gas high pressure electric heater for heating gas and the turboexpander, kinematically associated with the generator, according to the invention is further provided with a rechargeable battery with charging the latter from the generator when operating in the mode expander and connected to the heater at the initial installation and subsequent disconnection of the heater when the output of the expander on the sensitive work, and the electric heater is made of resistive and connected to the generator through a control unit, electrically connected with the temperature sensors installed on the inlet and outlet of the expander.

Before the expander can be installed in the heat exchanger-regenerator DL the preliminary heat in the turboexpander gas high pressure hot gas low pressure, coming out of the turboexpander.

Comparative analysis of the claimed gazoturbostroenie installation with prototype and other solutions in this field of technology shows that set forth in patent formula, the set of features not known from the existing art, on the basis of what can be concluded about its compliance with the criteria of the invention of "novelty."

Compliance with the proposed solution the criteria of the invention "industrial applicability" is evident from the following specific example gazoturbostroenie installation.

The invention is illustrated by drawings, where phila functional diagram gazoturbostroenie installation made according to claim 1 of the patent formula ("low temperature" arrangement), 2 - the same thing PP, 3 patent formula ("high temperature" arrangement).

Positions and designations presented in the diagram:

And - rechargeable battery;

B - control;

G - generator;

H - heater;

T - turboexpander;

1 - highway natural gas high pressure;

2 is a resistive heater;

3 - the turboexpander;

4 - generator;

5 - control;

6 - thermocouple (temperature sensor);

7 is a rechargeable battery.

8 - heat exchanger-regenerator.

The setting for "niscat mperatures" diagram (figure 1), includes highway 1 natural gas high pressure, which sequentially includes an electric resistance heater 2 and the expander 3, kinematically associated with the generator 4. The heater 2 is connected to the generator 4 via the control unit 5 is electrically connected with a temperature sensor (thermocouple) 6.

To the heater 2 and the generator 4 via the control unit 5 connected to the battery 7.

The setting on "high-temperature" diagram (figure 2), contains the same elements, but additionally includes a heat exchanger-regenerator 8 to heat in the expander 3 cold high pressure gas hot gas of low pressure.

Work gazoturbostroenie installation is carried out as follows.

In the initial period of operation, the heater 2 is connected to a pre-charged rechargeable battery 7.

Natural gas high pressure enters line 1, is heated in the heater 2 to a predetermined temperature (250...350 or 350...600 K when the installation is running on "low" or "high temperature" diagram, respectively, passes through the expander 3, expands on his shoulders and released the next consumer in the form of low pressure gas. The energy of the compressed gas is transferred into kinetic energy of the turbine electric is generator 4. The part produced by the electricity generator 4 is supplied to the consumer, and some resistive heater 2 and the battery 8 for its recharging. After establishing the operating mode of the plant (reaching the set temperature of the hot low pressure gas at the outlet of the expander 3) the control unit 5 according to the signal from thermocouple 6 disconnects from the heater 2 to the battery 7. After the final charging of the battery 7, the control unit 5 disables her from the generator 4. Coming out of the expander 3 hot low-pressure gas enters the heat exchanger-regenerator 8 and cooled to the desired user temperature, heating the thus supplied to the input of expander cold high-pressure gas to boost capacity and eliminate condensation of hydrocarbons.

The temperature variation over the gas consumer from the set value is registered by thermocouple 6, an electrical signal which is fed to the control unit 5. The latter issues a control electrical signal to increase/decrease the degree of heating of a resistive heater 2.

To enable control of the gas temperature at the inlet to the expander on its input line can be additionally equipped with a temperature sensor (not shown), the electric the key associated with the control unit 5.

The use of the claimed invention can simplify the design concept of energy gazoturbostroenie setup provides the possibility to adjust the set values of the gas temperature at the inlet and outlet of the expander reduces the leakage of gas when it is reduced.

1. Azotobacteria installations for the disposal of the energy of compressed natural gas containing successively installed on the highway of natural gas high pressure electric heater for heating gas and the turboexpander, kinematically associated with the generator, characterized in that it is additionally equipped with a rechargeable battery with charging the latter from the generator when operating in the mode expander and connected to the heater at the initial time of installation and subsequent disconnection of the heater when the output of the expander on the sensitive work, and the electric heater is made of resistive and connected to the generator through a control unit, electrically connected with the temperature sensors installed on the inlet and outlet of the expander.

2. Azotobacteria installation according to claim 1, characterized in that before the expander is installed, the heat exchanger-regenerator for preheating incoming turboexpander gas in the high pressure hot gas low pressure, coming out of the turboexpander.



 

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