CN210861030U

CN210861030U - Heating power device for waste incineration power plant

Info

Publication number: CN210861030U
Application number: CN201921023366.5U
Authority: CN
Inventors: 杨宏伟; 李磊; 张天琦; 邰扬; 冷富荣; 方杨
Original assignee: Everbright Envirotech China Ltd; Everbright Environmental Protection Research Institute Nanjing Co Ltd
Current assignee: Everbright Envirotech China Ltd; Everbright Environmental Protection Research Institute Nanjing Co Ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-06-26
Anticipated expiration: 2029-07-02

Abstract

The utility model provides a heating power device for msw incineration power plant, include: the system comprises a deaerating type condenser, a water supply unit and a water supply unit, wherein the deaerating type condenser is used for deaerating water; a hybrid heater for heating the feed water deoxygenated by the deoxygenating condenser; a waste heat boiler for superheating the feed water heated by the hybrid heater to produce superheated steam. The technical proposal of the utility model reasonably simplifies the thermodynamic system of the power plant and saves the equipment land for burning the power plant; the equipment price of a deaerator is saved, the circulation efficiency of the whole thermodynamic system is improved, and the reliability and the economical efficiency of the system are improved.

Description

Heating power device for waste incineration power plant

Technical Field

The utility model relates to a msw incineration power generation technical field, concretely relates to be used for msw incineration power plant's heating power device.

Background

The life that the feedwater dissolved oxygen can shorten equipment reduces the heat exchange efficiency of thermal equipment, reduces the operational reliability and the economic nature of unit, and the thermodynamic system of general msw incineration power plant all sets up solitary oxygen-eliminating device and carries out the deoxidization to the feedwater. But a separately provided deaerator: 1. the occupied area is large, the pipelines are complex, and the complexity of the whole thermodynamic system is increased; 2. the parameters of the deaerator extraction steam turbine extraction steam are high and about 1.2-1.6 MPa, steam needs to be throttled when entering the deaerator, the pressure is reduced to 0.5-0.7 MPa, throttling loss exists, energy is wasted, and the economic benefit of a power plant is reduced.

Therefore, there is a need to provide a thermal plant for a waste incineration plant to solve the above-mentioned ending problem.

SUMMERY OF THE UTILITY MODEL

In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.

In order to solve the above problem, the utility model discloses a heating power device for msw incineration power plant, include:

the system comprises a deaerating type condenser, a water supply unit and a water supply unit, wherein the deaerating type condenser is used for deaerating water;

a hybrid heater for heating the feed water deoxygenated by the deoxygenating condenser;

a waste heat boiler for superheating the feed water heated by the hybrid heater to produce superheated steam.

Exemplarily, the system also comprises a steam turbine and a generator; the superheated steam drives the steam turbine to do work and generate dead steam; the generator is driven by the steam turbine to generate electricity.

Illustratively, the exhaust steam is processed by the deaerating condenser to produce condensed water.

Exemplarily, the shaft seal heating device is further included and used for heating the condensed water.

Exemplarily, the low-pressure water heater is further comprised and is used for secondarily heating the condensed water.

Illustratively, the hybrid heater recycles the secondarily heated condensed water.

Exemplarily, the system further comprises a feed water pump for delivering the secondarily heated condensed water to the hybrid heater.

The utility model discloses profitable effect is: the thermodynamic system of the power plant is reasonably simplified, and the equipment land of the incineration power plant is saved; the equipment price of a deaerator is saved, the circulation efficiency of the whole thermodynamic system is improved, and the reliability and the economical efficiency of the system are improved.

Drawings

The following drawings of the embodiments of the present invention are provided as a part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a schematic structural view of the present invention;

description of reference numerals:

1. a hybrid heater; 2. A waste heat boiler; 3. A steam turbine;

4. a generator; 5. A deaerating condenser; 6. A shaft seal heater;

7. a low pressure heater; 8. A feed pump;

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

In order to fully understand the present invention, a detailed description will be given in the following description to illustrate a thermal device for a waste incineration plant of the present invention. It is apparent that the practice of the invention is not limited to the specific details familiar to those skilled in the art of waste treatment. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.

It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art. In the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same elements are denoted by the same reference numerals, and thus the description thereof will be omitted.

In order to solve the problems in the prior art, the utility model provides a be used for msw incineration power plant's heating power device.

As shown in fig. 1: the utility model discloses a: the system comprises a hybrid heater 1, a waste heat boiler 2, a steam turbine 3, a generator 4 and a deaerating condenser 5. The deaerating type condenser 5 is mainly used for deaerating feed water and can condense exhaust steam after the steam turbine 3 is worked to generate condensed water. After the feed water is deaerated in the deaerating type condenser 5, the feed water is heated by the hybrid heater 1 and then enters the waste heat boiler 2, the waste heat boiler 2 carries out overheating treatment on the feed water to generate superheated steam, the superheated steam can drive the steam turbine 3 to do work, and meanwhile, the steam turbine 3 drives the generator 4 to generate electricity.

In a traditional thermal device of a waste incineration power plant, a deaerator is one of key equipment of a boiler and a heating system, if the deaerator has poor deaerating capacity, a water supply pipeline of the boiler, a coal economizer and other accessory equipment are corroded, and the economic loss caused by the poor deaerator is dozens or hundreds of times of the manufacturing cost of the deaerator. But the deaerator occupies too large area, occupies large area, has complex pipelines and increases the complexity of the whole thermodynamic system. The utility model discloses a deoxidization formula condenser replaces traditional oxygen-eliminating device, not only possesses the deoxidization function of oxygen-eliminating device, has still avoided the problem that traditional oxygen-eliminating device area is big, the management is complicated.

As shown in fig. 1, a gland seal heater 6 and a low pressure heater 7 may also be provided. The condensed water generated by condensing the exhaust steam by the deaerating condenser 5 can be heated by the shaft seal heater 6 and the low-pressure heater 7 and then enters the waste heat boiler 2 for recycling.

The low-pressure heater is used for pumping steam which does partial work in the steam turbine into the heater to heat feed water, so that the temperature of the water is increased, the amount of the steam discharged into the steam condenser by the steam turbine is reduced, the energy loss is reduced, and the circulation efficiency of a thermodynamic system is improved. The structure is that the vertical tube plate heater is adopted more. The heating surface of the heater is generally composed of a straight tube bundle or a U-shaped tube bundle which is composed of brass tubes or seamless steel tubes. The heated water enters one side of the separated water chamber from the upper water inlet pipe and then flows into the U-shaped pipe bundle, the U-shaped pipe absorbs the heat of the heated steam in the steam space of the heater and is transferred to the water flowing in the pipe through the pipe wall, and the heated water flows out through the water chamber at the outlet of the heater. The shaft seal heater is a device for recovering shaft seal leakage steam and heating condensed water by using heat of the shaft seal leakage steam, so that energy loss is reduced, and the heat efficiency of a unit is improved. When the steam turbine adopts an internal-discharge type shaft seal system, a shaft seal heater (a shaft seal cooler) is generally arranged for heating condensed water or demineralized water and recovering shaft seal leakage steam, thereby reducing the shaft seal leakage steam and heat loss. The air entering along with the shaft seal leakage steam is guided to the diffuser pipe of the water jet steam extractor by a common communicating pipe and is extracted by the negative pressure of the water jet steam extractor, thereby ensuring the micro-vacuum state of the shaft seal heater. Thus, the pressure of the chamber connected with the shaft seal heater and each shaft seal is reduced, and the shaft seal steam does not leak. The shaft seal air extractor or the exhaust fan is also used for producing negative pressure and discharging mixed air. The shaft seal air extractor is generally a steam-jet air extractor, a shaft seal heater matched with the shaft seal air extractor is divided into two stages, a steam leakage mixture enters into one stage, steam is condensed, air is sucked and mixed with working steam, the second stage is discharged after diffusion, the steam is condensed, and the air is discharged through an exhaust port.

As shown in fig. 1, the condensed water generated by the deaerating condenser 5 is delivered to the exhaust-heat boiler 2 by a feed pump for recycling.

The utility model discloses a deoxidization formula condenser, hybrid heater have replaced traditional deaerator, have saved power plant equipment area, have simplified thermodynamic system. The thermodynamic system without the deaerator has higher cycle efficiency (improved by about 0.5 percent), and the economic benefit of the incineration power plant is improved.

In addition, ground, high-order installation need be strengthened to traditional heating power oxygen-eliminating device, and the utility model discloses a ordinary ground to need not carry out the high-order installation. Simultaneously the utility model discloses need not hot steam, normal atmospheric temperature deoxidization has saved power plant's steam, has improved economic benefits. And the equipment area is little, and the installation is removed, and it is very convenient to maintain, can easily dilatation.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A thermal plant for a waste incineration plant, characterized in that it comprises:

2. The thermal device of claim 1, further comprising a turbine and a generator; the superheated steam drives the steam turbine to do work and generate dead steam; the generator is driven by the steam turbine to generate electricity.

3. The thermal device of claim 2, wherein the dead steam is treated by the deoxygenated condenser to produce condensed water.

4. The thermal device of claim 3 further comprising a gland seal heater for heating the condensate.

5. A thermal device according to claim 4, further comprising a low pressure heater for reheating the condensed water.

6. The thermal device of claim 5, wherein the hybrid heater recycles the secondarily heated condensed water.

7. The thermal device of claim 6, further comprising a feedwater pump for delivering the reheated condensate to the hybrid heater.