RU67644U1 - COMBINED HEAT AND POWER SYSTEM - Google Patents

Abstract

The utility model relates to the field of power engineering and can be used in combined heat and power supply systems to increase the efficiency of heat waste utilization and the efficiency of technological processes using hot gases, mainly drying, calcining and / or thermal plants. The combined heat and power system contains a thermal gas turbine, gas reciprocating or combined cycle power plant with heat exchangers - heat exchangers for cooling water and waste gases, which are included in the heat supply circuit of the heat consumer with heating and hot water systems, and after the heat exchanger - heat exhaust gas heat exchanger through the exhaust gas line a gas furnace and technological consumers of hot gas are included - drying, calcining and / or thermal units and. In addition, an air heat exchanger is additionally included in the heat supply circuit for heating the air entering the gas furnace, and the heat exchanger - the exhaust gas heat utilizer through the exhaust gas line is equipped with a bypass - bypass line (jumper).

Description

The utility model relates to the field of power engineering and can be used in combined heat and power supply systems to increase the efficiency of heat waste utilization and the efficiency of technological processes using hot gases, mainly drying, calcining and / or thermal plants.

A combined heat and power system is known from the prior art, comprising a thermal gas turbine, gas piston or combined cycle power plant with heat exchangers - heat exchangers for cooling water and waste gases, which are included in the heat supply circuit of a heat consumer with heating and hot water supply systems (see Heating equipment and heat supply to industrial enterprises. Under the editorship of B.N. Golubkov, M., "Energy", 1979, p.241-244). The main disadvantage of the known solution is the low efficiency of using the heat of the exhaust gases due to the low coefficient of heat transfer from gases to water.

The utility model is aimed at increasing the efficiency of utilization of recyclable thermal waste and the efficiency of technological processes using hot gases, mainly in drying, calcining and / or thermal installations.

The solution to this problem is ensured by the fact that in a combined heat and power system containing a thermal gas turbine, gas piston or combined cycle gas

a power plant with heat exchangers - heat exchangers for cooling water and exhaust gases, which are included in the heat supply circuit of the heat consumer with heating and hot water systems, according to the utility model, after the heat exchanger - heat utilizer of exhaust gases through the exhaust gas line, a gas furnace and process consumers of hot gas are connected in series - drying, calcining and / or thermal installations.

In addition, an air heat exchanger is additionally included in the heat supply circuit to heat the air entering the gas furnace.

In this case, the heat exchanger - the waste gas heat exchanger along the exhaust gas line is equipped with a bypass - bypass line (jumper).

The presence on the exhaust gas line of a gas furnace in series, into which the hot exhaust gas enters, and technological installations operating on hot gas, significantly increases both the efficiency of utilization of the heat of the exhaust gases of a gas turbine, gas reciprocating or combined cycle power plant and thermal waste in general, and the efficiency and the efficiency of the gas furnace serving industrial drying, calcining, thermal, etc. setting

The drawing schematically shows a General view of a combined heat and power system.

The combined heat and power system contains a thermal gas turbine, gas reciprocating or combined cycle power plant 1 with a heat exchanger - a heat exchanger 2 of cooling water heat and a heat exchanger - a heat exchanger 3 of exhaust gases that are included in the consumer heat supply circuit 4

heat 5 with heating systems and hot water supply (not shown in the drawing), sequentially connected after the heat exchanger-utilizer 3 of the exhaust gas heat through the exhaust gas line 6, a gas furnace 7 and process consumers 8 of hot gas, mainly drying, calcining and / or thermal installations. In addition, an air heat exchanger 9 is additionally included in the heat supply circuit 4 for heating the air entering the gas furnace 7, and the exhaust heat exchanger 3 of the exhaust gas heat through the exhaust gas line is equipped with a bypass - bypass line (jumper) 10 and control valves 11.

Combined heat and power system works as follows.

A thermal gas turbine, gas reciprocating or combined cycle power plant 1 generates electricity and, through a heat supply circuit 4 utilizing heat waste, provides heat to the consumer 5 of the heating system and hot water. Depending on the temperature required for technological reasons, which is regulated by valves 11, the exhaust gases after the heat exchanger of the exhaust gas heat exchanger 3 and / or bypass - bypass line (jumper) 10 enter the exhaust gas line 6 into a gas furnace 7, which also line 12 receives the air heated in the air heat exchanger 9 and fuel through line 13 The combustion products formed in the gas furnace 7 — hot gases mixed with the hot exhaust gases — are sent through pipeline 14 to process consumers 8 in drying, calcining and / or thermal plants.

Claims (2)

1. Combined heat and power system containing a thermal gas turbine, gas reciprocating or combined cycle power plant with heat exchangers - heat exchangers for cooling water and waste gases, which are included in the heat supply circuit of the heat consumer with heating and hot water systems, characterized in that after the heat exchanger is a waste heat heat exchanger a gas furnace and process consumers of hot gas - drying, calcining and / or ter FRESH INSTALL. 2. The combined heat and power system according to claim 1, characterized in that the air heat exchanger is additionally included in the heat supply circuit to heat the air entering the gas furnace.