Start of section
Production, amateur
Radio amateurs
Aircraft model, rocket-model
Useful, entertaining 		Stealth Master
Electronics
Physics
Technologies
Inventions 		Secrets of the cosmos
Secrets of the Earth
Secrets of the Ocean
Tricks
Map of section
Start
Forum
Use of the site materials is allowed subject to the link (for websites - hyperlinks)

Navigation: =>

Home / Patent catalog / Catalog section / Back /

SYSTEMS AND METHODS OF CONSUMER HEAT SUPPLY
INVENTION
Patent of the Russian Federation RU2159393

METHOD OF WORK OF THE HEAT SUPPLY SYSTEM

METHOD OF WORK OF THE HEAT SUPPLY SYSTEM

The name of the inventor: Sharapov VI; Rotov PV; Orlov M.E.
The name of the patent holder: Ulyanovsk State Technical University
Address for correspondence: 432027, Ulyanovsk, ul. North Venet 32, UlSTU, pro-rector for research
Date of commencement of the patent: 1999.12.10

The invention relates to heat power engineering and can be used at thermal power plants. The way the system works is that network heaters and hot water boilers are connected in parallel. The temperature of the mains water in the supply network of the heating network is established based on the average saturation temperature of the steam of the upper heating system of the heating turbine. The flow of network water in the base part of the heat load regulation schedule is regulated by changing the number of network heaters, and in the peak part of the schedule, when the network heaters are switched on, the water boilers are switched on. The technical result achieved by the present invention is to increase the efficiency and quality of the heat supply system by more fully loading the hot water boilers and lower the costs of preparing make-up water for the heat supply system.

DESCRIPTION OF THE INVENTION

The invention relates to the field of heat power engineering and can be used at thermal power plants.

There are known analogues - the methods of operation of the heat supply system, according to which the network water supplied from consumers is successively heated by steam of the lower and upper heating selections in the upper and lower network heaters of parallel connected heat-recovery turbines, and then in the hot-water boilers, the heat load Q of the heat supply system is changed in accordance with Temperature of the outside air according to the graph Q = f (t n ) (see Sokolova E. Ya. "Heating and Thermal Networks", Moscow: Energoizdat, 1982, Fig. 3.1b on page 53 and a description for it on 53-54, figure 4.35 on page 135 and a description to it on pages 134-135).

This analogue is adopted as a prototype.

The disadvantages of analogs and a prototype are low efficiency and quality of operation of heat supply systems due to incomplete loading and reduced reliability of hot-water boilers. When the water is heated in series connected network heaters and hot water boiler according to the standard schedule of heat networks 150/70 o C, the heat transfer surfaces of the boiler are subject to intensive scale formation and, as a consequence, burning of these surfaces. To increase the reliability of hot water boilers, expensive methods of preparing make-up water are necessary, which is not always justified for economic reasons, but also for environmental reasons (because of the need for waste water disposal). Some thermal power plants limit the temperature of water after boilers to 100-120 o C to prevent scale formation, which affects the quality of the heat supply systems, because the thermal power of the hot water boilers is underused and it becomes impossible to carry out quality regulation of the heat supply system Q by increasing the network water temperature by Output from the hot water boiler.

The technical result achieved by the present invention is to increase the economical and reliable operation of the heat supply system by fully loading the hot water boilers, reducing the costs of preparing the make-up water for the heat supply system, and also by reducing the damaging nature of the hot water boilers.

To achieve this result, a method of operating a heat supply system is proposed in which the incoming water from the consumer is successively heated by the steam of the lower and upper heating selections in the lower and upper network heaters of parallel connected heat-recovery turbines, and in the hot-water boilers, the heat load Q of the heat supply system is changed to Accordance with the outside air temperature t n according to the graph of the dependence Q = f (t n ).

The difference of the claimed method is that the temperature of the network water in the supply line 1 are maintained constant, set it based on the average saturation temperature of the steam of the upper heating system heating turbines t t, taking into account the average value of the water underheating in the upper network heaters T bls : 1 = t in - T vsp , the flow of network water in the base part of the heat load regulation curve Q = f (t n ) is controlled by changing the number of network heaters switched on, and in the peak part of the schedule, when the network heaters of all turbines are switched on, the flow of the network water is regulated by changing the number of boilers included in parallel with the network Preheaters.

Limiting the temperature of the network water by the amount 1 = t in - T combined with the quantitative regulation of the heat supply, conducted in accordance with the proposed procedure, makes it possible to increase the efficiency of the heat supply systems through the operation of hot-water boilers at a more full load (due to increased water temperatures at the inlet and outlet of hot-water boilers) and by reducing the cost of preparing the make-up water. Decrease in the value 1 leads to a reduction in the damageability of hot-water boilers and an increase in the reliability of heat supply systems.

The Applicant's prior art analysis, including a search for patent and scientific and technical information sources and identification of sources containing information on analogues of the claimed invention, made it possible to establish that the applicant did not find an analogue characterized by features identical to all the essential features of the claimed invention. The definition of the prototype from the list of identified analogs made it possible to identify a set of essential characteristics relative to the technical result of the applicant in the claimed method, set forth in the claims.

Therefore, the claimed invention corresponds to the condition of "novelty".

In order to verify the compliance of the claimed invention with the condition "inventive step", the applicant conducted an additional search of known solutions in order to identify the signs that coincide with the features of the claimed method, which are distinct from the prototype. The results of the search showed that the claimed invention does not clearly follow from the prior art for the skilled person, since the prior art determined by the applicant did not reveal the effect of the transformations required by the essential features of the claimed invention to achieve a technical result. In particular, the claimed invention does not provide for the addition of a known means by any part that is attached to it by known rules for achieving a technical result, in respect of which it is determined precisely such additions. So, such transformation can not include the inclusion in the way of operation of the heat supply system of heating the network water in parallel connected network heaters and hot water boilers, since this operation in the claimed method is carried out in another set of essential characteristics and according to other rules in comparison with the known methods that And allows to ensure achievement of the desired technical result.

Further, we will consider the information confirming the possibility of implementing the invention with obtaining the desired technical result.

For work on the claimed method, the heat supply system is connected to a thermal power plant, the schematic diagram of which is shown in the drawing. A thermal power plant with a heat supply system connected to it contains heating turbines 1, lower 2 and upper 3 heating sockets with lower 4 and upper 5 network heaters connected to them, hot water boilers 6 connected to mains pipelines parallel to the lower 4 and top 5 network heaters, And network pumps 7. The water purification plant 9, the vacuum deaerator 10, the accumulator tank 11, the boost pump 12 are sequentially connected to the make-up water pipe 8.

Let us consider an example of the implementation of the claimed method.

At the beginning of the heating season, the network water coming from consumers in the amount of 4000 t / h at a temperature of 50-60 ° C is supplied to the lower 4 and top 5 network heaters of one of the T-100-130 heating turbines 1, where the steam is heated by the lower 2 And the upper 3 heating selections of the heating turbines 1. The temperature of the network water 1 in the supply line is established based on the average saturation temperature of the upper heating sockets 3, the heating turbines 1 taking into account the average value of the water underheating in the upper network heaters 5 T vsp = 5 ° C and maintained constant. The vapor pressure in the upper heating seals 3 is 0.15-0.20 MPa with a saturation temperature of 115-120 ° C, therefore, the temperature of the mains water in the supply line 1 = t in - T = 115-120 - 5 = 110-115 ° C. The flow rate of the network water in the base part of the graph Q = f (t n ) is regulated by changing the number of lower 4 and upper 5 network heaters included. When the temperature of the outside air decreases, the heat load of the heat supply system increases, for which the network water is additionally heated in hot water boilers 6 of the type PTVM-180 to a temperature of 110-115 ° C. In the peak part of the graph, the flow of the network water is regulated by additional switching on of the boilers 6 included Parallel to the lower 4 and top 5 network heaters. To replenish the losses of the network water in the heating network, the make-up pump 12 is supplied with the make-up water prepared by the simplified technology from the water-purification plant 9 through the vacuum deaerator 10 and the storage tank 11. The water is supplied to the mains supply line by the network pumps 7.

The foregoing information indicates that the following set of conditions is fulfilled when the claimed method is used:

- the means embodying the claimed method in its implementation, is intended for use in the industry in the field of heat power engineering;

- for the claimed method as it is characterized in the claims, it is confirmed that it can be carried out using means or methods described in the application or prior to the date of priority;

- the method of operation of the heat supply system embodying the claimed invention in its implementation, is capable of achieving the desired technical result.

Therefore, the claimed invention corresponds to the condition "industrial applicability".

CLAIM

The way of operation of the heat supply system, through which the network water supplied from the consumer is successively heated by the steam of the upper and lower heating selections in the lower and upper network heaters of parallel connected heating turbines, and in the hot water boilers, the heat load Q of the heat supply system is changed in accordance with the outside air temperature T n according to the graph of the dependence Q = f (t n ), characterized in that the temperature of the network water in the supply line 1 are kept constant, set it, proceeding from the average saturation temperature of the steam of the upper heating system heating turbines t t, taking into account the average value of the water underheating in the upper network heaters T bls : 1 = t in - T ssp , the flow of the network water in the base part of the heat load regulation curve Q = f (t n ) is controlled by changing the number of the included network heaters, and in the peak part of the graph, when the network heaters of all turbines are switched on, the flow of the network water is regulated by changing the number of boilers included Parallel to mains heaters.

print version
Date of publication 29.01.2007gg