CN210982064U - Water pressure test device for supercritical boiler reheater - Google Patents
Water pressure test device for supercritical boiler reheater Download PDFInfo
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- CN210982064U CN210982064U CN201921950254.4U CN201921950254U CN210982064U CN 210982064 U CN210982064 U CN 210982064U CN 201921950254 U CN201921950254 U CN 201921950254U CN 210982064 U CN210982064 U CN 210982064U
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Abstract
The utility model discloses a supercritical boiler re-heater hydrostatic test device belongs to power boiler technical field. Carry out water pressure test device structure complicacy, the water resource does not obtain the problem of recycling to the re-heater among the prior art, the utility model provides a supercritical boiler re-heater water pressure test device, it includes the re-heater body, and one side of re-heater body is provided with water feeding pipeline, and water supply equipment is connected to water feeding pipeline's the other end, and re-heater body opposite side is provided with the drain pipe, and the drain pipe is connected with the atmosphere flash tank, the delivery port of atmosphere flash tank bottom passes through the condensate water tank and is connected with water supply equipment. The utility model discloses a water-feeding pipeline and drain pipe carry out the water feeding and discharge, and are easy and simple to handle, improve work efficiency and be connected with the atmosphere flash tank through the drain pipe, the atmosphere flash tank is connected with water supply equipment and carries out the cyclic utilization of water resource, effectively reduces cost in business, still has simple structure, reasonable in design, easily advantage of making.
Description
Technical Field
The utility model belongs to the technical field of the power boiler, more specifically say, relate to a supercritical boiler reheater hydrostatic test device.
Background
Coal-fired power generating units of power plants all employ boilers to convert the chemical energy of a fuel into the thermal energy of steam for power generation. Coal-fired boilers have a strong coking corrosivity, so after boiler maintenance, four-pipe corrosivity inspection is generally performed by means of a hydraulic test, and the four pipes refer to a superheater, a reheater, an economizer and a water supply pipe. The hydraulic test is a main means for checking the tightness of four pipes after the boiler is overhauled, and is divided into three stages: water feeding, pressure boosting and water discharging. However, the existing water pressure detection system for the reheater is complex in structure and complex in operation, and a large amount of manpower and time are often consumed.
Corresponding improvements are also made to the above problems, such as chinese patent application No. CN201611146835.3, published as 2018, 6.29. the patent provides a water feeding device and a water feeding method for a boiler reheater, which is applied to a boiler of an overhaul unit and comprises a water feeding pipeline, wherein one end of the water feeding pipeline is connected to a condensate system of an operating unit, and the other end of the water feeding pipeline is connected to the boiler reheater of the overhaul unit, and is used for conveying condensate generated by the operating unit to the boiler reheater of the overhaul unit. Accordingly, a method of water-feeding a boiler reheater is provided. The invention can greatly reduce the power consumption in the water feeding stage of the hydrostatic test. The disadvantages of the patent are that: although the condensed water can be recycled, the water resource is not recovered correspondingly when the water discharging stage of the reheater is carried out.
Also as in chinese patent application CN201510205550.1, published as 2016, 11, 23, the patent discloses a hydraulic test method for a eastern Junggar boiler, comprising the following steps: the water feeding to the superheater and the reheater is started simultaneously, the water pressure of the superheater and the water pressure of the reheater are respectively tested in the water feeding process to the superheater and the reheater, synchronous operation on the superheater and the reheater can be achieved in the water feeding stage and the water pressure test stage, the time of the hydraulic test of the eastern Junggar coal boiler can be greatly saved, the power consumption of water supply equipment can be reduced, and the cost is reduced. The disadvantages of the patent are that: although providing an effective solution to the problem of long hydrostatic testing times, the cost is high.
Disclosure of Invention
1. Problems to be solved
Carry out water pressure test device structure complicacy, the water resource does not obtain the problem of recycling to the reheater among the prior art, the utility model provides a supercritical boiler reheater water pressure test device. The utility model has the advantages of simple overall structure, be convenient for realize the water feeding and the operation of draining of re-heater to through atmosphere flash vessel one end and the pipeline connection that drains, the other end is connected the cyclic utilization who realizes the water resource with water supply equipment, effectively reduces the cost in business.
2. Technical scheme
In order to solve the above problems, the utility model adopts the following technical proposal.
The utility model provides a supercritical boiler re-heater hydrostatic test device, includes the re-heater body, and one side of re-heater body is connected with the one end of water-feeding pipeline, and water supply equipment is connected to the other end of water-feeding pipeline, and the opposite side of re-heater body is connected with the one end of drain pipe, and the atmosphere flash tank is connected to the other end of drain pipe, the delivery port of atmosphere flash tank bottom passes through the condensate water tank and is connected with water supply equipment. Water in the hydrostatic test can be recycled, enters the water supply equipment through the condensate tank and is collected to be convenient for use next time, and cost is saved for enterprises.
Furthermore, the water feeding pipeline is sequentially provided with a water inlet valve, a regulating valve and a water feeding check valve along the water feeding direction. The water feeding flow is convenient to control, the safety performance of the water feeding process is ensured, and the water feeding efficiency is improved.
Further, the water inlet valve is an electric valve. Simple operation and light structure.
Furthermore, an exhaust valve is further arranged on the water feeding pipeline. The water feeding process is prevented from being influenced by vibration generated by the pressure of water in a water feeding pipeline.
Furthermore, the atmosphere flash tank is connected with the condensed water tank through a pipeline. So that the water flow has higher sealing performance in transportation.
Furthermore, a sealing gasket is arranged at the joint of the atmospheric flash tank and the pipeline. Further improve sealing performance and simple structure, simple to operate.
Furthermore, a steam outlet at the top of the atmospheric flash tank is connected with an exhaust condenser, and the exhaust condenser is connected with a steam output pipeline. The steam is collected and recycled, and the energy is recycled.
Furthermore, the inner walls of the water feeding pipeline and the water discharging pipeline are both provided with an anticorrosive layer. The service life of the water supply pipeline and the water discharge pipeline is prolonged.
Furthermore, the water supply equipment is a condensate system of the running supercritical boiler, and an outlet of the condensate system is connected with the water supply pipeline. The condensed water generated in the operating boiler is reasonably utilized, auxiliary equipment is reduced, and the electric quantity and the energy consumption are reduced.
Furthermore, the outlet of the condensed water system is connected with the water feeding pipeline through a flange. Connect firm and convenient dismantlement.
3. Advantageous effects
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses a be provided with water supply pipeline and drain line respectively in the both sides of re-heater, conveniently carry out re-heater hydrostatic test to the boiler unit in service, it is easy and simple to handle, alleviate manual operation intensity to improve re-heater hydrostatic test efficiency greatly; the water discharge pipeline is connected with the atmospheric flash tank, and a water outlet at the bottom of the atmospheric flash tank is connected with water supply equipment, so that water in the whole test process is recycled, and the cost of an enterprise is greatly reduced;
(2) the utility model is provided with a water inlet valve, a regulating valve and a water feeding check valve along the water feeding direction in sequence, the water inlet valve controls the water feeding or stopping of the whole water feeding pipeline, the control valve is convenient to control the water flow in the water feeding pipeline, and the smooth water feeding process is ensured; the arrangement of the water feeding check valve effectively prevents water flow entering the reheater body from flowing backwards into the water supply equipment;
(3) the water inlet valve of the utility model is an electric valve, adopts electric control, lightens the labor intensity of operators, is light and handy, does not bring large bearing load to a water feeding pipeline, and improves the service life of the water inlet pipeline; the water supply pipeline is also provided with an exhaust valve, when water flow enters the reheater body through the water supply pipeline, the water flow has certain pressure and temperature, and the exhaust valve is arranged to perform an exhaust action on the water supply pipeline in order to avoid the water supply pipeline from vibrating to influence the use of the reheater body;
(4) the utility model discloses be provided with the condensate tank between atmosphere flash tank and water supply equipment, carry out a cooling purification collection effect to the water resource in the atmosphere flash tank through the condensate tank, then the export of condensate tank is connected with water supply equipment again, and the water resource can recycle when realizing carrying out the hydrostatic test to the reheater, and the energy saving is and then for enterprise's saving cost; a sealing gasket is arranged at the joint of the atmospheric air container and the pipeline, so that the sealing performance of the whole process is improved;
(5) the steam outlet at the top of the atmospheric empty container in the utility model is connected with the exhaust condenser, and the exhaust condenser is connected with the steam output pipeline, thereby realizing the recycling of the steam energy in the atmospheric flash tank; the inner walls of the water feeding pipeline and the water discharging pipeline are provided with anti-corrosion layers, so that the service lives of the two pipelines are prolonged, and the maintenance cost is reduced;
(6) water supply installation for the condensate system of supercritical boiler in service, because the condensate pressure that the operation unit produced is between 2-6MPa, and only need about 1MPa to the pressure of reheater body water feeding, pressure satisfies the water feeding needs completely, need not to use other auxiliary assembly to carry out the water feeding, very big reduction power consumption, for the enterprise has practiced thrift manufacturing cost, reduction energy consumption.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. a reheater body; 2. a water supply pipeline; 3. a water discharge pipe; 4. an atmospheric flash tank; 5. a water supply facility; 6. a condensed water tank.
Detailed Description
The invention will be further described with reference to specific embodiments and drawings.
Example 1
A hydraulic test device for a supercritical boiler reheater comprises a reheater body 1, wherein one side of the reheater body 1 is connected with one end of a water feeding pipeline 2, the other end of the water feeding pipeline 2 is connected with a water supply device 5, the other side of the reheater body 1 is connected with one end of a water discharging pipeline 3, the other end of the water discharging pipeline 3 is connected with an atmosphere flash tank 4, and a water outlet at the bottom of the atmosphere flash tank 4 is connected with the water supply device 5 through a condensate water tank 6; the atmospheric flash tank 4 is an important auxiliary device in the operation process of the boiler, and is mainly used for collecting drainage, water drainage and steam with different pressure grades in the starting and moving processes of the boiler, and enabling the high-temperature water and the steam to expand and reduce pressure in the atmospheric flash tank 4 so as to generate saturated steam and saturated water for cyclic utilization; the utility model connects the atmospheric flash tank 4 with the water supply equipment 5, so that the water resource in the whole hydraulic test process can be recycled; the whole structure is simple, water feeding and discharging of the reheater body 1 are carried out through the water feeding pipeline 2 and the water discharging pipeline 3, the operation is simple and convenient, and the hydraulic test efficiency of the reheater is improved; the production cost of the enterprise is saved as a whole;
supercritical boiler reheater hydrostatic test device theory of operation as follows: the water feeding test for the reheater comprises three steps of water feeding, pressure boosting and water discharging; the water supply operation is carried out on the reheater body 1 through the water supply pipeline 2, the water discharge pipeline 3 is closed at the moment, and the water pressure in the reheater body 1 gradually rises along with the continuous water supply of the water supply pipeline 2; when the reheater drain valve at the top of the reheater body 1 is overflowed, it is indicated that the reheater body 1 is full of water, at this time, the reheater drain valve is closed and the water supply pipeline 2 is kept to supply water continuously, when the reheater body 1 is full of water, the water pressure in the reheater body 1 is detected, when the water pressure detection value reaches the reheater working pressure value, such as 5.02MPa, the water pressure in the reheater body 1 is kept at the reheater working pressure for a preset duration, at this time, whether water seepage occurs in the reheater body 1, the water supply pipeline 2 and the water supply equipment 5 is checked, if water seepage does not occur in the reheater body 1, the next step of testing is performed on the water pressure of the reheater body 1, at this time, water is continuously supplied to the reheater body 1, when the water pressure detection value in the reheater body 1 reaches the water pressure test value of the reheater body 1, the water supply pipeline, if the reheater water pressure drop rate is less than a preset first threshold, the first threshold may be set according to a field condition, in this embodiment, the first threshold is 0.05-0.1 MPa; the water pressure of the reheater body 1 is qualified; after the water discharging operation is qualified, the water discharging operation is carried out on the reheater body 1 by opening the water discharging pipeline 3, and the whole process of the hydraulic test of the reheater is completed. When the water discharge pipeline 3 discharges water, the water discharge pipeline is connected with an inlet of the atmospheric flash tank 4, and a water outlet of the atmospheric flash tank 4 is connected with the water supply equipment 5 through a pipeline to store and reuse water resources.
Example 2
Basically as in embodiment 1, preferably, the water supply pipeline 2 is sequentially provided with a water inlet valve, a regulating valve and a water supply check valve along a water supply direction, the water discharge pipeline 3 is sequentially provided with a water discharge valve and a regulating valve along a water discharge direction, the water inlet valve and the water discharge valve control the working state of the whole pipeline, the regulating valve can effectively control the water flow in the water supply pipeline 2 and the water discharge pipeline 3, and the smooth operation of water supply and water discharge is ensured by controlling the water flow speed to further stabilize the pressure of the water flow; the water feeding check valve on the water feeding pipeline 2 effectively prevents water flow entering the reheater body 1 from flowing backwards into the water supply equipment 5, so that the backflow preventing function is achieved, and the smooth water feeding process is ensured; preferably, the water inlet valve is an electric valve, the labor intensity of operators is reduced by adopting electric control, and the electric valve is light in structure and cannot bring large heavy load to the water feeding pipeline 2; more specifically, the water supply pipeline 2 is further provided with an exhaust valve, so as to prevent the vibration of the water supply pipeline 2 caused by the pressure of the water flow in the water supply pipeline 2, and the exhaust valve can be arranged behind the water supply non-return valve, namely, a water inlet valve, an adjusting valve, a water supply non-return valve and an exhaust valve are sequentially arranged along the water supply direction.
Example 3
Basically the same as embodiment 1, specifically, the atmospheric flash tank 4 is connected with the condensate water tank 6 through a pipeline, so that the saturated water from the bottom of the atmospheric flash tank 4 is prevented from leaking, and the pipeline connection improves the sealing performance of the whole water flow transportation; preferably, a sealing gasket is arranged at the joint of the atmosphere flash tank 4 and the pipeline, so that the sealing effect is further enhanced, and the sealing gasket has a simple structure and good sealing performance; a steam outlet at the top of the atmospheric flash tank 4 is connected with an exhaust condenser, and the exhaust condenser is connected with a steam output pipeline, so that the recycling of steam energy in the atmospheric flash tank 4 is realized; and the inner walls of the water feeding pipeline 2 and the water discharging pipeline 3 are both provided with an anticorrosive coating. The anticorrosive coating is a coating formed by uniformly coating the inner walls of the water feeding pipeline 2 and the water discharging pipeline 3 with coating made of anticorrosive materials, so that the corrosion resistance of the water feeding pipeline 2 and the water discharging pipeline 3 is improved, the service life of the water feeding pipeline is prolonged, and the maintenance cost is reduced.
Example 4
Basically as in embodiment 1, preferably, the water supply equipment 5 is a condensate system of a running supercritical boiler, an outlet of the condensate system is connected with the water supply pipeline 2, and since the supercritical boiler generates condensate during the running process and the pressure of the condensate is between 2MPa and 6MPa, the pressure of the water supply to the reheater body 1 only needs about 1MPa, and the pressure of the condensate completely meets the requirement of the water supply, no other auxiliary equipment such as a condensate pump is used for water supply, so that the power consumption is greatly reduced, the production cost is saved for enterprises, and the energy consumption is reduced; furthermore, the outlet of the condensed water system is connected with the water feeding pipeline 2 through a flange, so that the connection relation is stable and the disassembly and the assembly are convenient, the installation and maintenance time is reduced, and the efficiency of the whole working process is improved.
The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.
Claims (10)
1. The utility model provides a supercritical boiler re-heater hydrostatic test device, includes re-heater body (1), its characterized in that: one side of re-heater body (1) is connected with the one end of water-feeding pipeline (2), and water supply equipment (5) are connected to the other end of water-feeding pipeline (2), and the opposite side of re-heater body (1) is connected with the one end of drain pipe (3), and atmosphere flash tank (4) is connected to the other end of drain pipe (3), the delivery port of atmosphere flash tank (4) bottom passes through condensate tank (6) and is connected with water supply equipment (5).
2. The apparatus of claim 1, wherein the apparatus further comprises: the water feeding pipeline (2) is sequentially provided with a water inlet valve, a regulating valve and a water feeding check valve along the water feeding direction.
3. The apparatus of claim 2, wherein the apparatus further comprises: the water inlet valve is an electric valve.
4. The apparatus according to claim 2 or 3, characterized in that: an exhaust valve is further arranged on the water feeding pipeline (2).
5. The apparatus of claim 1, wherein the apparatus further comprises: the atmosphere flash tank (4) is connected with the condensed water tank (6) through a pipeline.
6. The apparatus of claim 1 or 5, wherein the apparatus comprises: a sealing gasket is arranged at the joint of the atmospheric flash tank (4) and the pipeline.
7. The apparatus of claim 6, wherein the apparatus comprises: and a steam outlet at the top of the atmospheric flash tank (4) is connected with an exhaust condenser, and the exhaust condenser is connected with a steam output pipeline.
8. The apparatus of claim 1, wherein the apparatus further comprises: the inner walls of the water feeding pipeline (2) and the water discharging pipeline (3) are both provided with an anticorrosive layer.
9. The apparatus of claim 1, wherein the apparatus further comprises: the water supply equipment (5) is a condensate system of a running supercritical boiler, and an outlet of the condensate system is connected with the water supply pipeline (2).
10. The apparatus of claim 9, wherein the hydraulic pressure test apparatus comprises: the outlet of the condensed water system is connected with the water feeding pipeline (2) through a flange.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921950254.4U CN210982064U (en) | 2019-11-12 | 2019-11-12 | Water pressure test device for supercritical boiler reheater |
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| CN201921950254.4U CN210982064U (en) | 2019-11-12 | 2019-11-12 | Water pressure test device for supercritical boiler reheater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781990A (en) * | 2020-07-27 | 2021-05-11 | 中核检修有限公司 | Reheater testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781990A (en) * | 2020-07-27 | 2021-05-11 | 中核检修有限公司 | Reheater testing device |
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