Filter for heat exchange module of steam turbine generator unit

Abstract

The utility model belongs to the field of heat exchange of steam turbine generator units, and discloses a filter for a heat exchange module of a steam turbine generator unit, which comprises a mounting seat, heat exchange sheets are arranged on the mounting seat, and a cold medium inlet pipe, a cold medium outlet pipe, a hot medium inlet pipe and a hot medium outlet pipe are mounted on the side surface of the mounting seat. A filter module is arranged on the cold medium inlet pipe, valves are respectively arranged on the cold medium inlet pipe on two sides of the filter module, and a detachable filter element group is arranged on the filter module. The filter module with the detachable filter element set is arranged on the cold medium inlet pipe, impurities in cold media can be effectively intercepted, and heat exchange pieces are prevented from being blocked; the valves on the two sides facilitate isolation of the filter module during maintenance, filter element replacement without shutdown is achieved, and the continuous operation capacity of the system is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the heat exchange field of steam turbine generator unit, concretely relates to a filter for steam turbine generator unit heat exchange module. BACKGROUND

[0002] In modern power production, the heat exchange module of steam turbine generator unit is the key heat exchange equipment in power plant, and its main function is to pass through the heat exchanger and transmit the steam waste heat discharged by steam turbine to cooling medium (such as water or air), so as to realize the recovery and utilization of energy. This process not only improves energy utilization efficiency, but also effectively reduces environmental pollution. The filter in the heat exchange module is an important component for ensuring its long-term stable operation, and its performance directly affects the efficiency and safety of the whole system.

[0003] However, the existing heat exchange module of steam turbine generator unit relies on circulating water as cooling medium. The impurities carried in circulating water are easy to accumulate inside the heat exchanger, resulting in gradual decline of heat exchange efficiency. The existing heat exchange module often needs to be stopped for cleaning, for example, the Chinese patent with publication number CN101741098A discloses a back pressure type steam turbine generator unit connected to the power system of power plant, which includes two sections of power work section and standby section on the high-voltage side of plant high-voltage transformer, and the high-voltage side of standby transformer is connected to power grid. The back pressure type steam turbine generator unit has a generator connected to the work section on the high-voltage side of plant high-voltage transformer in a fork connection mode. The back pressure type steam turbine is arranged between the quick shut-off valve and the heat exchanger in the heat supply system of cogeneration.

[0004] At the same time, the plate heat exchanger is very inconvenient to clean and maintain due to its complex structure. Once the heat exchange effect is significantly reduced, the heat exchanger needs to be disconnected from the system, and then the heat exchanger needs to be disassembled and cleaned, which is time-consuming and laborious.

[0005] Therefore, the present application is proposed. UTILITY MODEL CONTENT

[0006] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, and provide a filter for steam turbine generator unit heat exchange module. The utility model is realized by the following technical scheme:

[0007] A filter for steam turbine generator unit heat exchange module, comprising a mounting seat, heat exchange fins are arranged on the mounting seat, cold medium inlet pipes, cold medium outlet pipes, hot medium inlet pipes and hot medium outlet pipes are installed on the side surface of the mounting seat, a filter module is arranged on the cold medium inlet pipe, a valve is arranged on each of the cold medium inlet pipes on the two sides of the filter module, and a detachable filter core group is arranged on the filter module.

[0008] Preferably, the filter module comprises two fixed flanges fixedly installed on the cold medium inlet pipe, and a filter element set is installed between the two fixed flanges, and a filter element is arranged in the filter element set.

[0009] Preferably, the filter element set comprises an installation sleeve, and a first installation flange and a second installation flange are arranged at two ends of the installation sleeve respectively.

[0010] The first installation flange is arranged at the medium input side of the cold medium inlet pipe, the second installation flange is arranged at the side of the cold medium inlet pipe facing the heat exchange fin, and a filter element extending into the installation sleeve is installed on the second installation flange.

[0011] Preferably, a conical end plate is installed on the side of the filter element facing the first installation flange, and the top of the conical end plate points to the cold medium inflow direction.

[0012] Preferably, through holes are formed in the two fixed flanges, the first installation flange and the second installation flange.

[0013] Preferably, the through holes are countersunk holes.

[0014] Preferably, a sealing gasket is arranged between the fixed flange and the filter element set.

[0015] Preferably, a water pan is arranged below the filter module.

[0016] Preferably, a filter module is also arranged on the hot medium inlet pipe.

[0017] Compared with the prior art, the filter module has the following beneficial effects:

[0018] 1. By arranging the filter module with a detachable filter element set on the cold medium inlet pipe, impurities in the cold medium can be effectively intercepted, and the heat exchange fin can be prevented from being blocked; the two side valves facilitate isolation of the filter module during maintenance, realize replacement of the filter element without stopping the machine, and improve the continuous operation capacity of the system.

[0019] 2. The modular design of the filter element set clamped by the fixed flange simplifies the installation process, ensures accurate positioning of the filter element, and facilitates separate replacement of the filter element, thereby reducing the maintenance cost.

[0020] 3. By designing the top of the conical end plate to conform to the cold medium flow direction, the fluid can be guided to pass through the filter element uniformly, the pressure loss caused by excessively high local flow rate is reduced, and the service life of the filter element is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is an installation schematic view of the filter module;

[0022] Figure 2 is a schematic view of the internal structure of the filter element set.

[0023] In the figure: 1, mounting seat; 2, heat exchange fin; 3, cold medium inlet pipe; 4, cold medium outlet pipe; 5, hot medium inlet pipe; 6, hot medium outlet pipe; 7, filter core group; 71, fixed flange; 72, mounting sleeve; 73, first mounting flange; 74, second mounting flange; 75, filter core; 76, conical end plate; 77, mounting hole; 8, water pan; 9, valve. DETAILED DESCRIPTION

[0024] The utility model is further described below with reference to the drawings.

[0025] As shown in Figure 1 and Figure 2 The embodiment provides a filter for a heat exchange module of a steam turbine generator unit, comprising a mounting seat 1, wherein the mounting seat 1 is provided with heat exchange fins 2, and the side surface of the mounting seat 1 is provided with a cold medium inlet pipe 3, a cold medium outlet pipe 4, a hot medium inlet pipe 5 and a hot medium outlet pipe 6; a filter module is arranged on the cold medium inlet pipe 3; one valve 9 is arranged on each of the two sides of the cold medium inlet pipe 3; and a detachable filter core group 7 is arranged on the filter module.

[0026] By arranging the filter module with the detachable filter core group 7 on the cold medium inlet pipe 3, impurities in the cold medium can be effectively intercepted, and the heat exchange fins 2 are prevented from being blocked; the two valves 9 facilitate isolation of the filter module during maintenance, realize replacement of the filter core without stopping the machine, and improve the continuous operation capacity of the system.

[0027] Further, the valve 9 can be a liquid on-off valve or a valve 9 with a composite gas-liquid separation function, which facilitates gas discharge and prevents gas from entering the heat exchange fins 2.

[0028] The filter module comprises two fixed flanges 71 fixedly arranged on the cold medium inlet pipe 3, and a filter core group 7 is arranged between the two fixed flanges 71; and a filter core is arranged in the filter core group 7. The modular design of the filter core group 7 clamped by the fixed flanges 71 simplifies the installation process and ensures accurate positioning of the filter core; and the split structure facilitates separate replacement of the filter core and reduces maintenance costs.

[0029] Further, the filter core group 7 comprises a mounting sleeve 72, and a first mounting flange 73 and a second mounting flange 74 are arranged at the two ends of the mounting sleeve 72 respectively.

[0030] The first mounting flange 73 is arranged on the medium input side of the cold medium inlet pipe 3, the second mounting flange 74 is arranged on the side of the cold medium inlet pipe 3 facing the heat exchange fins 2, and a filter core 75 extending into the mounting sleeve 72 is arranged on the second mounting flange 74.

[0031] The two ends of the mounting sleeve 72 are connected with pipelines through the first mounting flange 73 and the second mounting flange 74, forming an axially aligned sealed flow channel to avoid medium turbulence; the filter element 75 is arranged at the end of the flow direction to enhance the impurity capture efficiency and facilitate the disassembly of the filter element through the sleeve.

[0032] Further, the filter element 75 is sealingly mounted on the second mounting flange 74, and further, a threaded connection or the like can be used to separate the water flow on both sides of the filter element group 7 using the filter element 75.

[0033] Preferably, a conical end plate 76 is mounted on the side of the filter element 75 facing the first mounting flange 73, and the top of the conical end plate points to the cold medium inflow direction. The top of the conical end plate 76 is designed to conform to the cold medium flow direction, which can guide the fluid to pass through the filter element uniformly, reduce the pressure loss caused by excessive local flow rate, and prolong the service life of the filter element.

[0034] Further, the filter element 75 adopts a barrel-shaped filter element, which has uniform filtering effect and high heat exchange medium passing efficiency. Unlike multi-layer filter elements, the clogging of the previous filter element will not affect the passing efficiency of the heat exchange medium. Meanwhile, the flow direction of the heat exchange medium is from outside to inside along the barrel-shaped filter element, and the pressure formed by the heat exchange medium will only compress the filter element 75, but not expand it, thereby reducing the filtering effect.

[0035] Through holes 77 are formed in the two fixing flanges 71, the first mounting flange 73 and the second mounting flange 74. Further, the through holes 77 are uniformly arrayed along the axis of the fixing flange 71, the first mounting flange 73 and the second mounting flange 74. The design of the through holes 77 allows bolts or other fasteners to penetrate all the flanges, achieving multi-point uniform locking to prevent flange deflection and leakage, and ensuring the stability of the overall structure.

[0036] Preferably, the through holes 77 are countersunk holes. The countersunk holes of the fixing flange 71 and the mounting flange are oppositely arranged. The countersunk hole structure embeds the bolt head in the flange interior, avoiding the protruding part interfering with the pipeline layout or causing the risk of personnel bumping, thereby improving safety and space utilization.

[0037] A sealing gasket is arranged between the fixing flange 71 and the filter element group 7. The sealing gasket fills the assembly gap between the flange and the filter element group 7, and double-blocks the medium leakage path, effectively preventing medium leakage, especially under high pressure working conditions. Specifically, the sealing gasket is arranged between the fixing flange 71 and the first mounting flange 73, and between the fixing flange 71 and the second mounting flange 74.

[0038] Preferably, a water pan 8 is arranged below the filter module. The water pan 8 can collect residual liquid or condensed water dripping during filter element cleaning and maintenance, keep the environment around the equipment dry, and prevent water accumulation from corroding the base or causing electrical safety hazards.

[0039] Further preferably, the heat medium inlet pipe 5 is also provided with a filter module. The filter module added to the heat medium inlet pipe 5 synchronously intercepts particulate matters in the heat medium, avoids the risk of double-channel blockage of the heat exchanger, and comprehensively improves the reliability and heat exchange efficiency of the system.

[0040] Working process:

[0041] 1. Cold medium filtration and heat exchange process

[0042] When the steam turbine generator set is running, the cold medium (such as cooling water) enters the heat exchange module through the cold medium inlet pipe 3. In the cold medium flow path, the filter module first filters the medium:

[0043] The cold medium flows into the installation sleeve 72 of the filter core group 7, and when passing through the filter core 75, impurities (such as particulate matters, rust residues, etc.) are intercepted by the filter core, ensuring that the medium entering the heat exchange fin 2 is clean and avoiding blockage or wear of the surface of the heat exchange fin 2.

[0044] The top of the conical end plate 76 points to the medium inflow direction, guiding the fluid to uniformly diffuse to the surface of the filter core, reducing the pressure drop and filter core wear caused by excessively high local flow rate, and improving the filtration efficiency and service life.

[0045] The filtered cold medium flows out of the heat exchange module through the cold medium outlet pipe 4, completing the heat exchange with the hot medium.

[0046] 2. Filter module maintenance and filter core replacement

[0047] When the filter core needs to be cleaned or replaced:

[0048] Close the valves 9 on both sides of the filter module to isolate the filter module from the pipeline system. If a composite valve 9 is used, residual gas in the pipeline can be simultaneously discharged, avoiding the influence of air resistance on subsequent operations.

[0049] Loosen the bolts between the fixed flange 71 and the filter core group 7, and remove the filter core group 7.

[0050] Remove the old filter core from the installation sleeve 72 and replace it with a new filter core, and use a sealing washer to re-tighten the flange group to ensure sealing. The entire replacement process does not require shutdown, ensuring continuous operation of the system (the replacement process can be limited to within ten minutes, which will not affect the operation of the unit).

[0051] 3. Synchronous filtration of hot medium

[0052] When the hot medium enters the heat exchange module through the hot medium inlet pipe 5, it also passes through an independent filter module to intercept particulate matters and other impurities, avoiding blockage of the hot side channel and ensuring balanced efficiency of the double-channel heat exchange.

[0053] Further, the safety is ensured by the stability of the replacement structure. The flange group connection design: the fixed flange 71, the first mounting flange 73 and the second mounting flange 74 are locked by multi-point locking of countersunk hole bolts, so that each flange surface is uniformly stressed to prevent deflection or leakage.

[0054] The sealing gasket fills the gap between the flanges, double-blocks the medium leakage, and ensures the sealing reliability, especially under high pressure working conditions.

[0055] The water pan 8 is located below the filter module to collect the liquid or condensed water dripping during maintenance, avoiding water accumulation to corrode the equipment or causing short circuit risk.

Claims

1. A filter for heat exchange module of steam turbine generator unit, comprising a mounting base (1), heat exchange fins (2) are arranged on the mounting base (1), cold medium inlet pipe (3), cold medium outlet pipe (4), hot medium inlet pipe (5) and hot medium outlet pipe (6) are mounted on the side of the mounting base (1), characterized in that: The cold medium inlet pipe (3) is provided with a filter module, and a valve (9) is arranged on the cold medium inlet pipe (3) on both sides of the filter module.

2. The filter for heat exchange module of steam turbine generator unit according to claim 1, characterized in that: The filter module comprises two fixed flanges (71) fixedly installed on the cold medium inlet pipe (3), and a filter core group (7) is installed between the two fixed flanges (71), and a filter core (75) is arranged in the filter core group (7).

3. The filter for heat exchange module of steam turbine generator unit according to claim 2, characterized in that: The filter core group (7) comprises an installation sleeve (72), and first and second installation flanges (73) and (74) are arranged at both ends of the installation sleeve (72), respectively. The first installation flange (73) is arranged on the medium input side of the cold medium inlet pipe (3), and the second installation flange (74) is arranged on the side of the cold medium inlet pipe (3) facing the heat exchange fin (2), and the second installation flange (74) is provided with a filter core (75) extending into the installation sleeve (72).

4. The filter for heat exchange module of steam turbine generator unit according to claim 3, characterized in that: A conical end plate (76) is arranged on the side of the filter core (75) facing the first installation flange (73), and the top of the conical end plate points to the cold medium inflow direction.

5. The filter for heat exchange module of steam turbine generator unit according to claim 3, characterized in that: Through holes (77) are formed in the two fixed flanges (71), the first installation flange (73) and the second installation flange (74).

6. The filter for heat recovery module of a steam turbine generator unit according to claim 5, wherein: The through holes (77) are countersunk holes.

7. The filter for heat recovery module of a steam turbine generator unit according to claim 2, wherein: Sealing washers are arranged between the fixed flanges (71) and the filter core group (7).

8. The filter for heat exchange module of steam turbine generator unit according to any one of claims 1-7, characterized in that: A water pan (8) is arranged below the filter module.

9. The filter for heat recovery module of steam turbine generator unit according to any one of claims 1-7, characterized in that: A filter module is also arranged on the hot medium inlet pipe (5).

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