Boiler soot blower drain water recycling device and generator set

Abstract

The invention relates to the field of boiler soot blowers, in particular to a boiler soot blower drain water recycling device and a generator set, the boiler soot blower drain water recycling device comprises a drain water pipeline arranged on a soot blower, an air heater drain water tank, a primary air heater steam supply pipeline, a primary air heater, a check valve and a temperature control valve, one end of the check valve is connected with the drain pipeline, the other end of the check valve is connected with one end of the temperature control valve, the first end of the steam air heater drain tank is connected with the other end of the temperature control valve, the other end of the temperature control valve is further connected with the first end of the primary air steam air heater steam supply pipeline, and the second end of the primary air steam air heater steam supply pipeline is connected with one end of the primary air steam air heater. And the other end of the primary air heater is connected with the second end of the air heater drain tank. According to the boiler soot blower drain water recycling device, working media and heat can be recycled, and the economical efficiency of a unit is improved.

Description

Technical Field

[0001] The invention relates to the field of boiler sootblowers, and in particular to a boiler sootblowers drainage recovery and utilization device and a generator set. Background Art

[0002] The steam soot blower of the boiler in the thermal power plant uses steam of a certain pressure and temperature to remove the soot on the heating surface of the boiler to keep the heating surface clean and make the boiler have higher efficiency and output. However, the water discharged from the steam soot blower is generally discharged to the atmospheric water expansion tank, and is not recycled to the thermal system, so the working fluid and heat are all wasted. Summary of the invention

[0003] To this end, an embodiment of the present invention provides a boiler sootblower drain recovery and utilization device, which can recover and utilize working fluid and heat to improve the economy of the unit.

[0004] The boiler sootblower drain recovery and utilization device according to an embodiment of the present invention comprises a drain pipe arranged on the sootblower, and is characterized in that it comprises:

[0005] A check valve and a temperature control valve, wherein one end of the check valve is connected to the drain pipe, and the other end of the check valve is connected to one end of the temperature control valve;

[0006] A heater drain tank, wherein a first end of the heater drain tank is connected to the other end of the temperature control valve;

[0007] A primary air heater steam supply pipe and a primary air heater, the other end of the temperature control valve is also connected to the first end of the primary air heater steam supply pipe, the second end of the primary air heater steam supply pipe is connected to one end of the primary air heater, and the other end of the primary air heater is connected to the second end of the heater drain tank.

[0008] The boiler sootblower drain recovery and utilization device of the embodiment of the present invention can recover and utilize working fluid and heat, thereby improving the economic efficiency of the unit.

[0009] In some embodiments, the boiler sootblower drain recovery device further includes a sampling valve and a water quality monitoring component, one end of the sampling valve is connected to the water quality monitoring component, and the other end of the sampling valve is connected to one end of the temperature control valve.

[0010] In some embodiments, the boiler sootblower drain recovery device also includes a flow regulating valve, one end of the flow regulating valve is connected to one end of the primary air heater, and the other end of the flow regulating valve is connected to the second end of the primary air heater steam supply pipe.

[0011] In some embodiments, the boiler sootblower drain recovery device further includes a deaerator, one end of the deaerator is connected to the third end of the heater drain tank, and the other end of the deaerator is connected to the low-pressure cylinder of the steam turbine.

[0012] In some embodiments, the boiler sootblower drain recovery device further includes a condenser, one end of the condenser is connected to the fourth end of the heater drain tank.

[0013] In some embodiments, the boiler sootblower drain recovery device further includes an atmospheric drain expansion tank and a first valve, one end of the first valve is connected to the temperature control valve, and the other end of the first valve is connected to the atmospheric drain expansion tank.

[0014] In some embodiments, the boiler sootblower drain recovery device also includes a first manual valve, one end of which is connected to the temperature control valve, and the other end of the first manual valve is connected to the first end of the primary air heater steam supply pipe.

[0015] In some embodiments, the boiler sootblower drain recovery device further includes a second manual valve, one end of the second manual valve is connected to the temperature control valve, and the other end of the second manual valve is connected to the first end of the heater drain tank.

[0016] In some embodiments, the boiler sootblower drain recovery device further includes a third manual valve, one end of the third manual valve is connected to the check valve, and the other end of the third manual valve is connected to the drain pipe.

[0017] The generator set according to the embodiment of the present invention comprises the boiler sootblower drain recovery device as described in any one of the above items.

[0018] The generator set of the embodiment of the present invention adopts the above-mentioned boiler sootblower drain recovery device to recover and utilize the working fluid and heat, thereby improving the economy of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is one of the boiler sootblower drain recovery and utilization devices of the embodiments of the present invention.

[0020] Figure 2 This is the second boiler sootblower drain recovery and utilization device according to the embodiment of the present invention.

[0021] Reference numerals:

[0022] Check valve 1, temperature control valve 2,

[0023] Heater drain tank 3,

[0024] Primary air heater steam supply pipeline 4, primary air heater 5, sampling valve 6, water quality monitoring component 7, deaerator 8, atmospheric drain expansion container 9, first valve 10, first manual valve 11, second manual valve 12, third manual valve 13, flow regulating valve 14, drain pipeline 15. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] refer to Figure 1 and Figure 2 As shown, a boiler sootblower drain recovery device according to an embodiment of the present invention includes a drain pipe 15 arranged on the sootblower, including: a heater drain tank 3, a primary air heater steam supply pipe 4, a primary air heater 5, a check valve 1 and a temperature control valve 2, one end of the check valve 1 is connected to the drain pipe 15, the other end of the check valve 1 is connected to one end of the temperature control valve 2, a first end of the heater drain tank 3 is connected to the other end of the temperature control valve 2, the other end of the temperature control valve 2 is also connected to the first end of the primary air heater steam supply pipe 4, the second end of the primary air heater steam supply pipe 4 is connected to one end of the primary air heater 5, and the other end of the primary air heater 5 is connected to the second end of the heater drain tank 3.

[0027] Specifically, one end of the check valve 1 is connected to a drain pipe 15 provided on the boiler sootblower, and the drain pipe 15 transports the water vapor output by the sootblower to the check valve 1. The other end of the check valve 1 is connected to a temperature control valve 2. The temperature control valve 2 is suitable for monitoring the temperature of the incoming steam. For example, when the incoming steam temperature is appropriate, the temperature control valve 2 is opened to transport the steam from the sootblower to the heater drain tank 3 to recycle the steam, that is, to recycle the working fluid.

[0028] The temperature control valve 2 is opened to convey the steam from the soot blower to the primary air heater 5. The primary air heater 5 is suitable for providing primary air to the generator set for ignition and combustion of the boiler. By recycling the steam in the soot blower drain pipe 15 on the boiler, the amount of auxiliary steam supplied to the primary air heater 5 is reduced, thereby saving auxiliary steam and improving economic benefits.

[0029] At the same time, the other end of the primary air heater 5 is connected to the second end of the heater drain tank 3. The steam heated by the primary air is discharged into the heater drain tank 3, and the heater drain tank 3 transports the water vapor to the deaerator 8 and condenser of the generator set to recycle the working fluid.

[0030] The boiler sootblower drain recovery device of the embodiment of the present invention can recycle the working fluid and heat by providing a heater drain box 3, a primary air heater steam supply pipe 4 and a primary air heater 5, so that the steam supply amount from auxiliary steam to the primary air heater 5 is reduced, thereby saving auxiliary steam and improving economic benefits.

[0031] In some embodiments, the boiler sootblower drain recovery device further includes a sampling valve 6 and a water quality monitoring component 7 , one end of the sampling valve 6 is connected to the water quality monitoring component 7 , and the other end of the sampling valve 6 is connected to one end of the temperature control valve 2 .

[0032] Specifically, when the boiler is started, the sampling valve 6 is opened to allow the water quality monitoring component 7 to monitor the water quality of the steam and water on the steam trap drain pipe 15. For example, the water quality is indirectly monitored by the conductivity of the water, and then a decision is made as to whether to continue to open the sootblower drain pipe 15, so as to avoid unqualified water vapor being transported to the boiler sootblower drain recovery device and the generator set, thereby improving the stability and safety of the device operation.

[0033] In some embodiments, the boiler sootblower drain recovery device also includes a flow regulating valve 14, one end of the flow regulating valve 14 is connected to one end of the primary air heater 5, and the other end of the flow regulating valve 14 is connected to the second end of the primary air heater steam supply pipe 4.

[0034] The steam supply temperature of the primary air heater 5 can be controlled by adjusting the opening of the flow regulating valve 14 arranged on the primary air heater 5, thereby flexibly controlling the steam supply amount entering the primary air heater 5, and then adjusting it according to actual needs to avoid the primary air heater 5 heating the primary air at a temperature that is too low or too high, thereby improving the applicability of the boiler sootblower drain recovery device.

[0035] In some embodiments, the boiler sootblower drain recovery device also includes a deaerator 8, one end of the deaerator 8 is connected to the third end of the heater drain tank 3, and the other end of the deaerator 8 is connected to the low-pressure cylinder of the steam turbine. When the unit is started, the sootblower drain is discharged to the atmospheric drain expansion tank 9, and when the unit is operating normally, the drain water quality output by the sootblower is qualified and discharged to the heater drain tank 3, the steam generated by the expansion of the heater drain tank 3 is sent to the deaerator 8, and the drain of the heater drain tank 3 is recovered to the condenser through the drain pipe 15. Then the working medium is recycled. Alternatively, the steam generated after the expansion of the heater drain tank 3 is sent to the deaerator 8, and part of the extraction steam from the steam turbine to the deaerator 8 is squeezed out. This part of the squeezed steam continues to work in the low-pressure part of the steam turbine, which increases the power of the unit, thereby reducing the operating cost of the generator set and improving the stability and safety of the generator set.

[0036] In some embodiments, the boiler sootblower drain recovery device further includes a condenser, one end of which is connected to the fourth end of the heater drain tank 3. The used steam is then output to the condenser of the generator set, the other end of the condenser is connected to the condenser pump in the generator set, and then the steam passes through the deaerator 8, the heater, and the boiler in sequence, and then the steam heated by the boiler enters the steam turbine of the generator set to generate electricity.

[0037] In some embodiments, the boiler sootblower drain recovery and utilization device further includes an atmospheric drain expansion tank 9 and a first valve 10, one end of the first valve 10 is connected to the temperature control valve 2, and the other end of the first valve 10 is connected to the atmospheric drain expansion tank 9. When the unit is started or the drain water quality is unqualified, the valve arranged between the sootblower drain and the atmospheric drain expansion tank 9 is opened, and the sootblower drain is discharged to the atmospheric drain expansion tank 9 through the drain pipe 15 to prevent the unqualified water vapor from being output to the generator set.

[0038] In some embodiments, the boiler sootblower drain recycling device further includes a first manual valve 11, one end of the first manual valve 11 is connected to the temperature control valve 2, and the other end of the first manual valve 11 is connected to the first end of the primary air heater steam supply pipe 4. Then, when the generator set is just started, the first manual valve 11 can be closed to prevent unqualified water vapor from entering the primary air heater steam supply pipe 4. And when the unit is operating normally and the sootblower drain water quality is qualified, the first manual valve 11 can be opened.

[0039] In some embodiments, the boiler sootblower drain recycling device further includes a second manual valve 12, one end of the second manual valve 12 is connected to the temperature control valve 2, and the other end of the second manual valve 12 is connected to the first end of the heater drain tank 3. Then, when the generator set is just started, the second manual valve 12 can be closed to prevent unqualified water vapor from entering the heater drain tank. And when the unit is operating normally and the sootblower drain water quality is qualified, the second manual valve 12 can be opened.

[0040] In some embodiments, the boiler sootblower drain recovery device further includes a third manual valve 13 , one end of the third manual valve 13 is connected to the check valve 1 , and the other end of the third manual valve 13 is connected to the drain pipe 15 .

[0041] The operation process of the boiler sootblower drain recovery device according to the embodiment of the present invention is as follows:

[0042] When the generator set is started or the drain water quality is unqualified, open the soot blower to drain to the atmospheric drain expansion tank 9, close the first manual valve 11 and the second manual valve 12, open the first valve 10, and discharge the soot blower drain to the atmospheric drain expansion tank 9.

[0043] When the unit is operating normally and the water quality of the sootblower drain is qualified, open the second manual valve 12, close the first valve 10, keep the first manual valve 11 closed, and the sootblower drain is discharged to the heater drain tank 3. The steam generated by the expansion in the heater drain tank 3 is sent to the deaerator 8, and the drain is recovered to the condenser. The working fluid is recycled, and the steam generated after the expansion of the heater drain tank 3 is sent to the deaerator 8, which squeezes out part of the extraction steam from the turbine to the deaerator 8. This part of the squeezed steam continues to work in the low-pressure part of the turbine, increasing the power of the unit.

[0044] After the primary and secondary air heaters are put into use in winter, the second manual valve 12 and the first valve 10 are closed, the first manual valve 11 is opened, and the soot blower drain is switched to the primary air heater steam supply pipe 4. The steam supply temperature of the primary air heater 5 is controlled by adjusting the opening of the flow regulating valve 14. Since the first end of the primary air heater steam supply pipe 4 is connected to the auxiliary steam system of the generator set to supply auxiliary steam to the primary air heater 5, by switching the soot blower drain to the primary air heater steam supply pipe 4, the auxiliary steam consumption of the primary air heater steam supply pipe 4 can be reduced, thereby reducing the operating cost of the generator set. That is, the soot blower drain steam source is increased, so that the auxiliary steam supply to the primary air heater 5 is reduced, thereby saving auxiliary steam.

[0045] The generator set according to the embodiment of the present invention comprises any one of the boiler sootblower drain recovery devices described above.

[0046] The generator set of the embodiment of the present invention adopts the above-mentioned boiler sootblower drain recovery device to recover and utilize the working fluid and heat, thereby improving the economy of the unit.

[0047] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0052] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A boiler sootblower drain recovery device, comprising a drain pipe (15) arranged on the sootblower, characterized in that: include: A check valve (1) and a temperature control valve (2), wherein one end of the check valve (1) is connected to the drain pipe (15), and the other end of the check valve (1) is connected to one end of the temperature control valve (2); A heater drain tank (3), wherein a first end of the heater drain tank (3) is connected to the other end of the temperature control valve (2); A primary air heater steam supply pipe (4) and a primary air heater (5), the other end of the temperature control valve (2) is also connected to the first end of the primary air heater steam supply pipe (4), the second end of the primary air heater steam supply pipe (4) is connected to one end of the primary air heater (5), and the other end of the primary air heater (5) is connected to the second end of the heater drain tank (3).

2. The boiler sootblower drain recovery and utilization device according to claim 1, characterized in that: It also comprises a sampling valve (6) and a water quality monitoring component (7), one end of the sampling valve (6) is connected to the water quality monitoring component (7), and the other end of the sampling valve (6) is connected to one end of the temperature control valve (2).

3. The boiler sootblower drain recovery and utilization device according to claim 2, characterized in that: It also comprises a flow regulating valve (14), one end of which is connected to one end of the primary air heater (5), and the other end of which is connected to the second end of the steam supply pipe (4) of the primary air heater.

4. The boiler sootblower drain recovery and utilization device according to claim 3, characterized in that: It also includes a deaerator (8), one end of which is connected to the third end of the heater drain tank (3), and the other end of which is connected to the low-pressure cylinder of the steam turbine.

5. The boiler sootblower drain recovery and utilization device according to claim 4, characterized in that: It also comprises a condenser, one end of which is connected to the fourth end of the heater drain tank (3).

6. The boiler sootblower drain recovery and utilization device according to claim 1, characterized in that: It also comprises an atmospheric hydrophobic expansion tank (9) and a first valve (10), wherein one end of the first valve (10) is connected to the temperature control valve (2), and the other end of the first valve (10) is connected to the atmospheric hydrophobic expansion tank (9).

7. The boiler sootblower drain recovery and utilization device according to claim 1, characterized in that: It also comprises a first manual valve (11), one end of which is connected to the temperature control valve (2), and the other end of which is connected to the first end of the steam supply pipe (4) of the primary air heater.

8. The boiler sootblower drain recovery and utilization device according to claim 1, characterized in that: It also comprises a second manual valve (12), one end of the second manual valve (12) is connected to the temperature control valve (2), and the other end of the second manual valve (12) is connected to the first end of the heater drain tank (3).

9. The boiler sootblower drain recovery and utilization device according to claim 1, characterized in that: It also comprises a third manual valve (13), one end of the third manual valve (13) is connected to the check valve (1), and the other end of the third manual valve (13) is connected to the drain pipe (15).

10. A generator set, characterized in that: It comprises the boiler sootblower drain recovery and utilization device as described in any one of claims 1-9.

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