CN210717498U - Low-level high-temperature salt-free deoxygenation water tank - Google Patents
Low-level high-temperature salt-free deoxygenation water tank Download PDFInfo
- Publication number
- CN210717498U CN210717498U CN201921681736.4U CN201921681736U CN210717498U CN 210717498 U CN210717498 U CN 210717498U CN 201921681736 U CN201921681736 U CN 201921681736U CN 210717498 U CN210717498 U CN 210717498U
- Authority
- CN
- China
- Prior art keywords
- water
- valve
- water tank
- low
- hot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Physical Water Treatments (AREA)
Abstract
The utility model discloses a low-order high temperature does not have salt deoxidization water tank, its characterized in that: the deoxidization water tank is in the low level, the deoxidization water tank includes the box, the box upper end is provided with the admission valve, the steam balance pipeline is connected to the admission valve, the box lower extreme is provided with the feed valve, be connected with the hot-water pump on the feed valve, the hot-water pump inflow velocity of flow is less than 1m/s, the water tank supply channel is connected to the hot-water pump. The method has the advantages of low investment, reliable operation, less cavitation of the hot water pump and difficult pump emptying of the hot water pump.
Description
Technical Field
The utility model relates to a power station technical field, concretely relates to power station energy storage heating system.
Background
Due to the development of the society and the implementation of various policies for energy conservation and emission reduction in China, the cogeneration of heat and power of a thermal power plant is only a production mode for central heating. In order to further improve the thermal efficiency, most of the steam extraction units of the thermal power plant are further replaced by the backpressure unit, a plurality of steam extraction units of the thermal power plant which completely stop the peak shaving mode are available, and the heat supply is completely completed by the backpressure unit and the double reduction.
However, the heat load of most heat supply zones is unstable. They are characterized by peaks (maximum heat use period) from 8 to 11 am and troughs (minimum heat use period) from 23 to 6 pm. When the peak-to-valley ratio exceeds 200% (average steam consumption at peak/average steam consumption at valley), great inconvenience is brought to system operation, not only the unit efficiency is low, but also the environmental-friendly denitration is difficult to reach the standard.
In addition, according to the electric power design specification, the salt-free deoxygenation water tank in the power station heating system must be located above the boiler feed pump by more than 16 meters so as to ensure that high-temperature water at the inlet of the water pump cannot be vaporized, further ensure that the water pump cannot be subjected to cavitation erosion, and ensure that the water pump cannot be cut off due to the fact that the pump is emptied. However, if the large-scale salt-free deoxygenation water tank is placed on a 16-meter layer, a large field is occupied, the civil engineering investment is huge, and the economic benefit is greatly reduced.
Therefore, how to improve the existing power station heating system to overcome the above problems is a problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a move stably, the heating power reinforce, energy utilization is rateed highly, safety ring protects's power station energy storage heat supply peak valley governing system.
Another object of the utility model is to provide an utilize this power station energy storage heat supply peak valley governing system's governing method.
Another object of the present invention is to provide a low-level high-temperature salt-free deoxygenation water tank with less investment, reliable operation, less cavitation of the hot water pump, and less possibility of emptying the hot water pump.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a power station energy storage and heat supply peak-valley adjusting system comprises a deaerator, a deaerator water tank, a deaerator water supply pipeline, a water tank water supply pipeline, a bypass adjusting pipeline, a steam balancing pipeline and a steam supplementing pipeline;
the deaerator is positioned at a high position, the lower end of the deaerator is connected with a water supply pipeline of the deaerator, and the deaerator water supply pipeline is used for supplying water to a boiler; the upper end of the deaerator is connected with the steam balance pipeline, the steam balance pipeline is respectively connected with the deaerating water tank and the steam supplementing pipeline, and the steam supplementing pipeline is connected to the heat supply main pipe;
the de-aeration water tank is at a low position and comprises a tank body, an air inlet valve is arranged at the upper end of the tank body and connected with the steam balance pipeline, a water supply valve is arranged at the lower end of the tank body and connected with a hot water pump, the inflow velocity of the hot water pump is less than 1m/s, the hot water pump is connected with a water tank supply pipeline, the water tank supply pipeline is connected with a de-aerator supply pipeline, a bypass adjusting pipeline is connected in parallel with two ends of the hot water pump, and a bypass adjusting valve is arranged on the bypass adjusting pipeline;
when the bypass regulating valve is closed, water in the box body can enter a water supply pipeline of the deaerator through the water supply valve, the hot water pump and the water supply pipeline of the water tank in sequence; when the bypass adjusting valve is opened, water in the water supply pipeline of the deaerator can enter the box body through the water supply pipeline of the water tank, the bypass adjusting pipeline and the water supply valve in sequence; and a bidirectional flowmeter is arranged on the water supply pipeline of the water tank.
Preferably, the water supply pipeline of the deaerator comprises a deaerator downcomer and a low-pressure water supply main pipe, the deaerator downcomer extends from a high position to a low position and is connected with the low-pressure water supply main pipe, the low-pressure water supply main pipe is at the low position, and the low-pressure water supply main pipe is connected with the water supply pipeline of the water tank;
the deaerator water supply pipeline with be provided with the pressurization pipeline between the boiler, the pressurization pipeline includes high pressure water supply female pipe and pressurization feed pump, high pressure water supply female pipe with low pressure water supply female pipe is established ties, the pressurization feed pump set up in low pressure water supply female pipe with between the high pressure water supply female pipe, high pressure water supply female union coupling to the boiler.
As an improvement, a liquid level meter is arranged on the box body and used for monitoring the water storage capacity of the box body; the upper end of the box body is also provided with a standby air inlet valve and a safety valve, the standby air inlet valve can be connected with the steam balance pipeline, and the safety valve can automatically exhaust when the air pressure in the box body is overhigh; the lower end of the box body is also provided with a standby water supply valve and a sewage discharge valve, the standby water supply valve can be connected with the hot water pump, and the sewage discharge valve can be connected to a sewage treatment pool.
Preferably, the box body is of a spherical tank structure. The spherical tank has the advantage of maximum volume under the condition of the same surface area, and can improve the utilization rate of fields and raw materials.
A method for adjusting a power station energy storage and heat supply peak-valley adjusting system comprises the following steps:
s1: when the boiler is in a valley period of heat supply, the deaerator increases the amount of prepared high-temperature salt-free water, the high-temperature salt-free water reaches the pressure water-feeding pump through a water supply pipeline of the deaerator due to the height difference, and the pressure water-feeding pump pumps water required by the boiler; the redundant high-temperature non-saline water automatically flows into the deoxygenation water tank through a bypass adjusting pipeline and is stored;
s2: when the heat supply peak period is in the period, the deaerator prepares a small amount of high-temperature salt-free water or stops preparing the high-temperature salt-free water, the steam which is required to heat the deaerator is used for a small amount or is not used, and the saved steam enters a heat supply main pipe for heat supply; meanwhile, high-temperature brine-free water in the deoxygenation water tank is pumped by a hot water pump and reaches a pressurized water-feeding pump through a water tank water supply pipeline, and the pressurized water-feeding pump pumps water required by the boiler.
Specifically, in S1, the bypass adjustment valve on the bypass adjustment line is opened and controls the amount of high-temperature salt-free water entering the deaerating water tank; in S2, the bypass regulator valve is closed.
Compared with the prior art, the utility model has the advantages of it is following: the main production process of the heat supply unit is that a boiler generates high-temperature high-pressure steam, the high-pressure steam generates electricity through a back pressure steam turbine, the electricity is reduced to form low-pressure steam, one part of the low-pressure steam supplies heat, the other part of the low-pressure steam is used for heating and deoxidizing feed water of the boiler, the high-temperature steam is heated after the deoxidization and reaches the feed water temperature required by the boiler, and the feed water enters the boiler again. That is, the heating capacity of a set of heat supply units can be equal to that the steam yield of the boiler (i.e. the steam inlet of the back pressure turbine) is subtracted by the steam amount for deoxidizing and heating and then by the steam amount for high-temperature heating. The energy storage and heat supply peak-valley adjusting system stores high-temperature salt-free water by using the low-position high-temperature salt-free deoxidizing water tank, changes the amount of deoxidizing and heating steam, and supplies heat with large change under the condition that the load of the unit is not changed greatly. Specifically, when the load is at the valley of heat supply, more deoxygenated water is heated, the steam consumption for heating the deoxygenated water is increased, the load of the unit is increased, and prepared high-temperature salt-free water is stored in a low-level deoxygenating water tank; in the period of heat supply peak, the high-temperature salt-free water in the deaerating water tank is used, the deaerator is used for heating the high-temperature salt-free water less frequently or is stopped, saved steam is used for heat supply, and the heat supply capacity of the unit is improved.
It is worth mentioning that the deoxidization water tank bottom of this scheme is provided with the hot-water pump, can pressurize the high temperature no salt solution of deoxidization water tank, therefore the deoxidization water tank can be in the low level, can directly build subaerial, greatly reduced the civil engineering investment, improved economic benefits. In addition, the hot-water pump of this scheme adopts the low velocity of flow design, has adopted the design of steam pressurization simultaneously at the top of deoxidization water tank, can effectively solve the problem of hot-water pump cavitation and pump of empting, has improved the operating stability of system.
Drawings
Fig. 1 is a schematic structural view of a preferred embodiment according to the present invention;
fig. 2 is a schematic diagram of the deoxygenated water tank in a preferred embodiment of the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.
As shown in fig. 1 to 2, for the utility model discloses a preferred embodiment includes oxygen-eliminating device 1, deoxidization water tank 2, oxygen-eliminating device supply channel 3, water tank supply channel 4, bypass control pipeline 5, steam balance pipeline 6 and steam supplement pipeline 7. Specifically, the method comprises the following steps:
the deaerator 1 is in a high position, the lower end of the deaerator 1 is connected with a deaerator water supply pipeline 3, and the deaerator water supply pipeline 3 is used for supplying water to the boiler 100; the upper end of the deaerator 1 is connected with a steam balance pipeline 6, the steam balance pipeline 6 is respectively connected with a deaerating water tank 2 and a steam supplementing pipeline 7, and the steam supplementing pipeline 7 is connected to the heat supply main pipe 200.
The deoxidization water tank 2 is in the low level, the deoxidization water tank 2 includes box 21, the box 21 upper end is provided with admission valve 22, admission valve 22 connects steam balance pipeline 6, 2 lower extremes of box are provided with feed valve 23, be connected with hot-water pump 24 on the feed valve 23, the 24 intake flow rates of hot-water pump are less than 1 ms, hot-water pump 24 connects water tank supply channel 4, water tank supply channel 4 connects oxygen-eliminating device supply channel 3, bypass adjusting line 5 connects in parallel at the 24 both ends of hot-water pump, be provided with bypass adjusting valve 51 on the bypass adjusting line 5.
When the bypass regulating valve 51 is closed, water in the box body 21 can enter the water supply pipeline 3 of the deaerator through the water supply valve 23, the hot water pump 24 and the water tank water supply pipeline 4 in sequence; when the bypass regulating valve 51 is opened, water in the water supply pipeline 3 of the deaerator can enter the box body through the water supply pipeline 4 of the water tank, the bypass regulating pipeline 5 and the water supply valve 23 in sequence; a bidirectional flow meter 41 is arranged on the water supply pipeline 4 of the water tank.
As a conventional design, the deaerator water supply pipeline 3 comprises a deaerator lower water pipe 31 and a low-pressure water supply main pipe 32, the deaerator lower water pipe 31 extends from a high position to a low position and is connected with the low-pressure water supply main pipe 32, the low-pressure water supply main pipe 32 is at a low position, and the low-pressure water supply main pipe 32 is connected with the water tank water supply pipeline 4. Be provided with between oxygen-eliminating device water supply pipeline 3 and the boiler 100 and add pressure line 8, add pressure line 81 and include high pressure water supply female pipe 81 and pressure feed pump 82, high pressure water supply female pipe 81 and the female pipe 32 of low pressure water supply are established ties, add pressure feed pump 82 and set up between female pipe 81 of low pressure water supply and high pressure water supply, high pressure water supply female pipe 81 is connected to the boiler, has set up two pressure feed pumps 82 in this embodiment, is 1# pressure feed pump and 2# pressure feed pump respectively.
In this embodiment, the tank 21 is provided with a liquid level meter 25, the liquid level meter 25 is used for monitoring the water storage capacity of the tank 21, and a magnetic turning plate liquid level meter is adopted in this embodiment; the upper end of the box body 21 is also provided with a standby air inlet valve 26 and a safety valve 27, the standby air inlet valve 26 can be connected with the steam balance pipeline 6, and the safety valve 27 can automatically exhaust when the air pressure in the box body 21 is too high; the lower end of the tank 21 is also provided with a spare water supply valve 28 and a sewage drain valve 29, the spare water supply valve 28 being connectable to the hot water pump 24, and the sewage drain valve 29 being connectable to a sewage treatment tank. The box body 21 in this embodiment is a spherical tank structure.
The adjusting method of the embodiment comprises the following steps:
s1: when the heat supply valley period is finished, the deaerator increases the amount of prepared high-temperature salt-free water, namely the amount of backpressure steam is increased, and the load of a unit is improved; the high-temperature salt-free water reaches a pressurized water-feeding pump through a water supply pipeline of a deaerator due to the height difference, and the pressurized water-feeding pump pumps water required by the boiler; and the redundant high-temperature non-saline water automatically flows into the deoxygenation water tank through the bypass adjusting pipeline and is stored.
S2: when the heat supply peak period is in the period, the deaerator slightly prepares high-temperature salt-free water or stops preparing the high-temperature salt-free water, namely, the back pressure steam is less used, so that the load of the unit is reduced; the steam which should be heated in the deaerator is used less or not used, and the saved steam enters a heat supply main pipe for heat supply; meanwhile, high-temperature brine-free water in the deoxygenation water tank is pumped by a hot water pump and reaches a pressurized water-feeding pump through a water tank water supply pipeline, and the pressurized water-feeding pump pumps water required by the boiler.
In S1, the bypass regulating valve on the bypass regulating pipeline is opened and controls the amount of the high-temperature salt-free water entering the deaerating water tank; in S2, the bypass regulator valve is closed, and the pump water amount is regulated by the frequency-modulated motor of the hot water pump 24.
The example of the regulating system of the embodiment applied to the heat supply unit is as follows:
the main equipment is boiler, back pressure machine set, deaerator and deaerating water tank. The main parameters are as follows: the rated pressure of the main steam of the boiler is 13.7MPa, the temperature is 540 ℃, the water supply temperature is 245 ℃, the rated evaporation capacity is 130 tons/hour, and the maximum continuous evaporation capacity is 160 tons/hour; the rated steam admission amount of the backpressure unit is 150 tons/hour, the maximum steam admission amount is 160 tons/hour, the steam admission temperature is 535 ℃, the steam admission pressure is 13MPa, the steam exhaust pressure is 0.8MPa, the temperature is 200 ℃, the primary steam extraction pressure is 4.2MPa, the temperature is 380 ℃, the secondary steam extraction pressure is 1.6MPa, and the temperature is 280 ℃; the rated pressure of the deaerator is 1MPa, the design temperature is 200 ℃, the maximum water yield is 240 tons/hour, and the water outlet temperature is 170 ℃; deoxygenated water tank volume 1500m3The rated pressure is 1MPa, and the rated temperature is 200 ℃.
Based on the above equipment and parameters, the following comparison was made using the conditioning method of this example for each time period and using process data from a conventional operating regime, as shown in the following table:
as can be seen from the above table: under the condition of the same heat supply, the peak-to-valley ratio is reduced from 218% to 114%, the power generation amount of the peak shaving operation in one day is 145408+137132+186588 which is 469168KW/h, and the power generation amount of the conventional operation scheme in one day is 81104+137132+204480 which is 422716KW/h, so that the power generation amount of the peak shaving operation in one day is 46452KW/h more than that of the conventional operation. Meanwhile, in order to meet the requirement of conventional heat supply operation in the peak period, a No. 2 boiler needs to be started, and the operation cost is greatly increased. In the conventional mode, the service life of the boiler is greatly shortened due to the fact that the boiler is started and stopped day by day and night, and the boiler is not beneficial to safe operation; and in low-load operation, the load factor of the boiler back pressure steam turbine is only 56%, the operation of the boiler is unstable, and the environmental protection index is difficult to meet the requirement. The peak shaving operation mode of the present embodiment can avoid the above situation.
It should be noted that the drawings are illustrated in the attached drawings
The valve structure is shown, and most of the valves are in the prior art and are not described in detail, but the technical features of the valve structure, which are implicit in the present embodiment, are not hindered. In addition, most of valves in the embodiment are electrically operated valves, and can be matched with components such as a bidirectional flowmeter, a liquid level meter, a temperature band meter and the like, so that the operation of the system is automatically controlled.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The utility model provides a low-order high temperature does not have salt deoxidization water tank which characterized in that: the deoxidization water tank is in the low level, the deoxidization water tank includes the box, the box upper end is provided with the admission valve, the steam balance pipeline is connected to the admission valve, the box lower extreme is provided with the feed valve, be connected with the hot-water pump on the feed valve, the hot-water pump inflow velocity of flow is less than 1m/s, the water tank supply channel is connected to the hot-water pump.
2. The low-level high-temperature salt-free deoxygenated water tank of claim 1, wherein: the tank body is provided with a liquid level meter which is used for monitoring the water storage capacity of the tank body; the upper end of the box body is also provided with a standby air inlet valve and a safety valve, the standby air inlet valve can be connected with the steam balance pipeline, and the safety valve can automatically exhaust when the air pressure in the box body is overhigh; the lower end of the box body is also provided with a standby water supply valve and a sewage discharge valve, the standby water supply valve can be connected with the hot water pump, and the sewage discharge valve can be connected to a sewage treatment pool.
3. The low-level high-temperature salt-free deoxygenated water tank of claim 2, wherein: the box body is of a spherical tank structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921681736.4U CN210717498U (en) | 2019-10-09 | 2019-10-09 | Low-level high-temperature salt-free deoxygenation water tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921681736.4U CN210717498U (en) | 2019-10-09 | 2019-10-09 | Low-level high-temperature salt-free deoxygenation water tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210717498U true CN210717498U (en) | 2020-06-09 |
Family
ID=70926225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921681736.4U Active CN210717498U (en) | 2019-10-09 | 2019-10-09 | Low-level high-temperature salt-free deoxygenation water tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210717498U (en) |
-
2019
- 2019-10-09 CN CN201921681736.4U patent/CN210717498U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102194535B (en) | Pre-service hydrostatic test integrated system on secondary side of steam generator | |
| CN213631720U (en) | Single-pump single-tank molten salt heat storage system | |
| CN102194534A (en) | High-precision pressing and depressing process for pre-service hydraulic pressure test of steam generator secondary side | |
| CN210717497U (en) | Power station energy storage heat supply peak valley governing system | |
| CN210717498U (en) | Low-level high-temperature salt-free deoxygenation water tank | |
| CN212511076U (en) | Utilize high pressure feed water heater's energy storage to adjust heat supply peak valley system | |
| CN218467677U (en) | Coal-fired power generation system of coupling steam heat-retaining | |
| CN110553247A (en) | Power station energy storage and heat supply peak-valley adjusting system and method | |
| CN111706846A (en) | System for adjusting heat supply peak valley by utilizing energy storage of high-pressure heater and operation mode | |
| CN214221275U (en) | Steam extraction type cogeneration unit suitable for large steam extraction amount primary frequency modulation | |
| CN205481240U (en) | Novel series connection heat supply network drainage system | |
| CN109139153A (en) | Thermal generation unit heat storage type assists peak regulation heating system and method | |
| CN114837757A (en) | Thermal power plant high-pressure feed water bypass frequency modulation system with steam ejector and working method | |
| CN210740509U (en) | Low-pressure cylinder zero-output and heat storage tank combined peak shaving heat supply system | |
| CN208858422U (en) | Thermal generation unit heat storage type assists peak regulation heating system | |
| CN209944297U (en) | Thermodynamic system of power plant | |
| CN219064252U (en) | Steam extraction heat accumulation peak regulation system of coupling fused salt heat accumulation and steam heat accumulation tank | |
| CN205955783U (en) | Draw gas low -pressure system of heating boiler feedwater of power station steam turbine | |
| CN206531050U (en) | Synthesize the ammonia feed water system of boiler and synthetic ammonia installation | |
| CN206160088U (en) | Composite explosive production is with superheated water thermal technology system | |
| CN205593029U (en) | Soda heat transfer initial station is optimized to thermal efficiency | |
| CN215520992U (en) | Heating system of gas and steam combined cycle unit heater | |
| CN220772002U (en) | Thermal power plant steam condensation heat accumulation peak regulation system coupled with steam heat accumulation tank technology | |
| CN216409104U (en) | Back pressure unit coupling pure condensing unit degree of depth heating system | |
| CN218717028U (en) | Peak regulating system for coupling photo-thermal energy storage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |