Heating equipment capable of improving efficiency of steam turbine

Abstract

The utility model relates to the technical field of steam turbines, in particular to heating equipment capable of improving the efficiency of a steam turbine, which comprises a steam turbine connected with an air pre-warming heating device through an air delivery pipe, and is characterized in that the air pre-warming heating device comprises an exhaust fan, a heating box, a heat exchange box and a filter, the exhaust fan, the heating box, the heat exchange box and the filter are sequentially communicated through an air conveying pipeline, an outlet of the exhaust fan is further connected with a steam turbine through the air conveying pipeline, an electric heating coil is arranged in the heating box, a heat exchange pipe is arranged in the heat exchange box, an inlet of the heat exchange pipe is connected with a circulating pump through a pipeline, and the circulating pump is connected with the air conveying pipeline. The circulating pump is connected with an outlet of the cooling water pipe, an inlet of the cooling water pipe is connected with the cooling water tower through a pipeline, an inlet of the cooling water tower is connected with an outlet of the heat exchange pipe through a pipeline, and the cooling water pipe is arranged in the condenser.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steam turbine technical field, concretely relates to a heating equipment that can improve steam turbine efficiency. BACKGROUND

[0002] Steam turbine is a kind of rotary steam power device, high-temperature high-pressure steam is formed into high-speed airflow by nozzle and is injected onto blade, makes the rotor of steam turbine rotate, and does work to outside.Steam turbine usually adopts medium-pressure cylinder start, high-pressure cylinder start or high-medium pressure cylinder combined start several ways.

[0003] When steam turbine works, air inlet device is needed to provide air to increase kinetic energy conversion efficiency, but due to the air dust of the workshop where steam turbine is located, dust-containing air entering steam turbine interior can affect steam turbine service life, in addition, air entering steam turbine interior needs preheating, and currently preheating only adopts single electric heating mode, and energy consumption is large;At the same time, the waste heat generated by steam turbine exhaust is directly sent into cooling tower after heat exchange with cooling water, leading to incomplete waste heat utilization, and energy is wasted.

[0004] Based on this, a heating equipment that can improve steam turbine efficiency is designed. UTILITY MODEL CONTENTS

[0005] The utility model provides a heating equipment that can improve steam turbine efficiency.

[0006] The utility model is realized through following technical schemes: a heating equipment that can improve steam turbine efficiency, including steam turbine, the steam turbine is connected air prewarming heating device through air delivery pipe, its characterized in that, air prewarming heating device includes exhaust fan, heating box, heat exchange box and filter, exhaust fan, heating box, heat exchange box and filter are sequentially communicated through air delivery pipeline, the outlet of exhaust fan is also connected with steam turbine through air delivery pipeline, the heating box is equipped with electric heating coil, the heat exchange box is equipped with heat exchange pipe, the inlet of heat exchange pipe is connected circulating pump through pipeline, circulating pump is connected with the outlet of cooling water pipe, the inlet of cooling water pipe is connected cooling water tower through pipeline, the inlet of cooling water tower is connected the outlet of heat exchange pipe through pipeline, and the cooling water pipe is arranged in condenser.

[0007] Further, the pipeline, where the circulating pump is connected with the inlet of heat exchange pipe, is provided with regulating valve.

[0008] Further, the heating box outlet is provided with temperature sensor one, and the heat exchange box outlet is provided with temperature sensor two.

[0009] Further, the temperature sensor one, temperature sensor two, regulating valve, circulating pump and electric heating coil are connected to DCS control system.

[0010] The utility model discloses a beneficial effect is: the utility model discloses utilize cooling water to send the waste heat of steam turbine exhaust to the heat exchange box and carry out the primary heating to the air, and after heating, again heat the second time through the heating box, not only avoid the energy waste of exhaust waste heat, still effectively reduce the energy consumption of heating box, realize the purpose of energy saving.

[0011] The utility model discloses provide the air of temperature rise for steam turbine, and then improved the kinetic energy conversion efficiency of steam turbine. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structure schematic drawing of the utility model.

[0013] In the drawing, 1 filter, 2 heat exchange box, 21 heat exchange pipe, 3 temperature sensor two, 4 heating box, 41 electric heating coil pipe, 5 temperature sensor one, 6 air extractor, 7 steam turbine, 8 condenser, 81 cooling water pipe, 9 circulating pump, 10 regulating valve, 11 cooling tower. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and beneficial effect of the utility model more clearly, the technical scheme in the utility model is further explained below with examples.

[0015] As Figure 1 Shown, a kind of heating equipment that can improve steam turbine efficiency, including steam turbine 7, the steam turbine 7 is connected air pre-warming heating device by air delivery pipe, the air pre-warming heating device includes air extractor 6, heating box 4, heat exchange box 2 and filter 1, the air extractor 6, heating box 4, heat exchange box 2 and filter 1 are sequentially communicated by air delivery pipeline, the outlet of the air extractor 6 is also connected with steam turbine 7 by air delivery pipeline, the heating box 4 is equipped with electric heating coil pipe 41, the heat exchange box 2 is equipped with heat exchange pipe 21, heat exchange pipe 21 also uses coil pipe design, the inlet of heat exchange pipe 21 is connected with circulating pump 9 by pipeline, circulating pump 9 is connected with the outlet of cooling water pipe 81, the inlet of cooling water pipe 81 is connected with cooling tower 11 by pipeline, the inlet of cooling tower 11 is connected with the outlet of heat exchange pipe 21 by pipeline, the cooling water pipe 81 is arranged in condenser.

[0016] Regulating valve 10 is equipped on the pipeline of circulating pump 9 and heat exchange pipe 21 inlet connection.

[0017] Temperature sensor one 5 is equipped at heating box 4 outlet, and temperature sensor two 3 is equipped at heat exchange box 2 outlet.

[0018] Temperature sensor one 5, temperature sensor two 3, regulating valve 10, circulating pump 9, electric heating coil pipe 41 are all connected to DCS control system.

[0019] In use, air is filtered by the air filter 1 to remove dust, and then is initially heated in the heat exchange box 2, and the air is heated by the cooling water in the heat exchange box 2 with the waste heat of the condenser 8. At this time, the temperature sensor 2 3 monitors the outlet temperature of the heat exchange box 2 in real time. The initially heated air enters the heating box 4 through the air conveying pipeline. The electric heating coil 41 in the heating box 4 is powered to heat, and the air is heated again. The temperature sensor 1 5 monitors the temperature of the outlet of the heating box 4 in real time, and adjusts the working power of the electric heating coil 41 according to the outlet temperature. The air heated again is conveyed to the steam turbine 7 by the air blower 6 to improve the kinetic energy conversion efficiency of the steam turbine 7.

[0020] In addition to the technical features described in the specification, the remaining technical features are known to those skilled in the art.

Claims

1. A heating device capable of improving the efficiency of a steam turbine, comprising a steam turbine (7) connected to an air pre-warming heating device through an air delivery pipe, characterized in that, The air pre-warming heating device comprises an air extractor (6), a heating box (4), a heat exchange box (2) and a filter (1), the air extractor (6), the heating box (4), the heat exchange box (2) and the filter (1) are sequentially communicated through air conveying pipelines, the outlet of the air extractor (6) is further connected with a steam turbine (7) through an air conveying pipeline, the heating box (4) is internally provided with an electric heating coil (41), the heat exchange box (2) is internally provided with a heat exchange pipe (21), the inlet of the heat exchange pipe (21) is connected with a circulating pump (9) through a pipeline, the circulating pump (9) is connected with the outlet of a cooling water pipe (81), the inlet of the cooling water pipe (81) is connected with a cooling tower (11) through a pipeline, the inlet of the cooling tower (11) is connected with the outlet of the heat exchange pipe (21) through a pipeline, and the cooling water pipe (81) is arranged in a condenser.

2. The heating device capable of improving the efficiency of a steam turbine according to claim 1, characterized in that, An adjusting valve (10) is arranged on the pipeline, through which the circulating pump (9) is connected with the inlet of the heat exchange pipe (21).

3. The heating device capable of improving the efficiency of a steam turbine according to claim 1, characterized in that, A temperature sensor one (5) is arranged at the outlet of the heating box (4), and a temperature sensor two (3) is arranged at the outlet of the heat exchange box (2).

4. The heating device capable of improving the efficiency of a steam turbine according to claim 3, characterized in that, The temperature sensor one (5), the temperature sensor two (3), the adjusting valve (10), the circulating pump (9) and the electric heating coil (41) are all connected to a DCS control system.

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