Integrated condenser for high-back-pressure cascade heat supply system of air cooling unit

Abstract

The utility model provides an integrated condenser for a high-back-pressure cascade heat supply system of an air cooling unit. The integrated condenser comprises a condenser front half part and a condenser rear half part which are arranged in parallel, and five water chambers which are arranged around the condenser front half part and the condenser rear half part in a communicating manner, and the water chambers are communicated through heat exchange tube bundles to form a two-flow structure. According to the device, the two stages of heating condensers are combined into single equipment through integrated design, the number of water chambers and the pipeline connection complexity are reduced, and the structural redundancy of a heat supply network circulating water system is remarkably reduced; meanwhile, the total length of the equipment is shortened by adopting the integrated structural design, the two-stage heating units are compactly arranged, and the occupied area is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat supply system of thermal power plant, concretely relates to a kind of integrated condenser for high back pressure cascade heat supply system of air cooling unit. BACKGROUND

[0002] Under the current energy supply pattern, thermal power unit widely bears heat load, especially in northern region, most units are heat supply units. With the high back pressure cascade heat reform of air cooling unit as example, in this process, to realize the effective heating of heat network circulating water, special condenser must be set.

[0003] In view of the special needs of cascade heating, the heat network circulating water staged heating condenser adapted to different pressure levels of steam needs to be configured. For example, the common three-stage heat supply system composed of high back pressure + steam turbine + heat network heater, and the three-stage heating heat supply system composed of high back pressure + high back pressure condensing small steam turbine + heat network heater. In actual reform operation, two condensers are usually additionally arranged outside the workshop.

[0004] However, this reform mode makes the system quite complex, which is embodied in the following aspects: first, the water side related pipeline system of condenser is complicated, and the pipeline length is greatly increased due to the split arrangement; second, the synchronous addition of inlet pipe further aggravates the complexity of the system; third, the dispersed arrangement of equipment not only occupies a large amount of land resources, but also significantly increases the land area; finally, after the reform of the whole system is completed, the pipeline support has to be arranged dispersedly, which not only increases the cost greatly, but also greatly reduces the overall appearance. UTILITY MODEL CONTENT

[0005] In view of the defects of prior art, the utility model provides an integrated condenser for high back pressure cascade heat supply system of air cooling unit, which realizes the integrated design of two-stage heating condenser through structural innovation, and solves the problems of complex system, large occupation and high cost.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0007] An integrated condenser for high back pressure cascade heat supply system of air cooling unit, comprising a condenser front half and a condenser rear half arranged in parallel, five water chambers arranged in communication around the condenser front half and the condenser rear half, and two flow processes formed by heat exchange tube bundles in communication between the water chambers.

[0008] Further, the five water chambers are sequentially arranged in flow order as follows:

[0009] First water chamber: connecting heat network circulating water return pipe and distributing to lower tube bundle of condenser front half;

[0010] Second water chamber: to realize water flow diversion to the upper tube bundle of the front half of the condenser;

[0011] Third water chamber: to collect the water outlet of the front half of the condenser and distribute to the rear half of the condenser;

[0012] Fourth water chamber: to realize water flow diversion of the rear half of the condenser;

[0013] Fifth water chamber: to collect the final water outlet.

[0014] Further, the first water chamber and the fifth water chamber are arranged between the front half of the condenser and the rear half of the condenser; the third water chamber is arranged on the upper part of the first water chamber and the fifth water chamber; the second water chamber is arranged outside the front half of the condenser; and the fourth water chamber is arranged outside the rear half of the condenser.

[0015] Further, the heat exchange tube bundles of the front half of the condenser and the rear half of the condenser are arranged in staggered arrangement.

[0016] Further, independent hot well structures are arranged below the front half of the condenser and the rear half of the condenser, respectively, and the two hot wells are communicated through a U-shaped drainage pipe with a certain height to form a water seal structure, and the two hot well structures are each provided with a water level monitoring device and an emergency drainage valve.

[0017] Further, the first water chamber is connected with a circulating water return pipe of the heat network, and the fifth water chamber is connected with a water inlet of a next-stage heater.

[0018] Further, the front half of the condenser is connected with a steam turbine exhaust pipe through a first throat, and the rear half of the condenser is connected with an exhaust pipe of a steam augmenter or a small back pressure turbine through a second throat.

[0019] Compared with the prior art, the integrated condenser for the high back pressure step-by-step heat supply system of the air cooling unit has the following beneficial technical effects:

[0020] System structure simplification: the two-stage heating condensers are combined into a single device through integrated design, the number of water chambers and the complexity of pipe connections are reduced, and the structural redundancy of the heat network circulating water system is significantly reduced.

[0021] Optimization of space layout: the integrated shell structure shortens the total length of the equipment, realizes compact arrangement of the two-stage heating units, and effectively reduces the occupied area. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and the ordinary skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0023] Figure 1 The figure is a structural schematic diagram of an integrated condenser for a high-backpressure cascade heat supply system of an air-cooled unit. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the ordinary skilled in the art without any creative effort are within the protection scope of the present application.

[0025] Referring to Figure 1 The integrated condenser for a high-backpressure cascade heat supply system of an air-cooled unit comprises a condenser front half 7 and a condenser rear half 6 arranged in parallel, five water chambers arranged in communication around the condenser front half 7 and the condenser rear half 6, and two flow processes formed by the heat exchange tube bundles arranged in communication between the water chambers.

[0026] In the present application, the five water chambers are sequentially arranged in the order of flow processes as follows:

[0027] The first water chamber 1 is connected to a heat network circulating water return pipe and distributes water to the lower tube bundle of the condenser front half 7.

[0028] The second water chamber 3 is used to divert water flow to the upper tube bundle of the condenser front half 7.

[0029] The third water chamber 4 is used to collect water from the condenser front half 7 and distribute the water to the condenser rear half 6.

[0030] The fourth water chamber 5 is used to divert water flow of the condenser rear half 6.

[0031] The fifth water chamber 2 is used to collect the final water.

[0032] In the present application, the first water chamber 1 and the fifth water chamber 2 are arranged between the condenser front half 7 and the condenser rear half 6; the third water chamber 4 is arranged at the upper part of the first water chamber 1 and the fifth water chamber 2; the second water chamber 3 is arranged outside the condenser front half 7; and the fourth water chamber 5 is arranged outside the condenser rear half 6.

[0033] In the application, the heat exchange tube bundles of the condenser front half 7 and the condenser rear half 6 are arranged in staggered rows.

[0034] In the application, the condenser front half 7 and the condenser rear half 6 are respectively provided with independent hot well structures 9, 8 below, and the two hot wells are communicated through a U-shaped drain pipe 10 having a certain height to form a water seal structure, and the two hot well structures 8, 9 are both provided with water level monitoring devices and emergency drain valves.

[0035] In the application, the first water chamber 1 is connected with a hot network circulating water return pipe, and the fifth water chamber 2 is connected with a water inlet of a next stage heater.

[0036] In the application, the condenser front half 7 is connected with a steam turbine exhaust pipe through a first throat, and the condenser rear half 6 is connected with a steam augmenter or a small back pressure machine exhaust pipe through a second throat.

[0037] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An integrated condenser for a high back-pressure cascade heating system of an air-cooled unit, characterized in that: It includes a condenser front half (7) and a condenser rear half (6) arranged in parallel, and five water chambers connected around the condenser front half (7) and the condenser rear half (6). The water chambers are connected to each other through heat exchange tube bundles to form a two-process structure.

2. The integrated condenser according to claim 1, characterized in that: The five water chambers are arranged in the following order according to the process flow: First water chamber (1): Connects to the return water pipe of the heating network and distributes it to the lower tube bundle of the front half (7) of the condenser; Second water chamber (3): enables water flow to be redirected to the upper tube bundle of the front half (7) of the condenser; The third water chamber (4) collects the water from the front half (7) of the condenser and distributes it to the rear half (6) of the condenser; Fourth water chamber (5): Enables the reversal of water flow in the rear half (6) of the condenser; Fifth water chamber (2): collects the final outflow.

3. The integrated condenser according to claim 1 or 2, characterized in that: The first water chamber (1) and the fifth water chamber (2) are located between the front half (7) and the rear half (6) of the condenser; the third water chamber (4) is located above the first water chamber (1) and the fifth water chamber (2); the second water chamber (3) is located outside the front half (7) of the condenser; and the fourth water chamber (5) is located outside the rear half (6) of the condenser.

4. The integrated condenser according to claim 1, characterized in that: The heat exchange tube bundles of the front half (7) and the rear half (6) of the condenser are arranged in a staggered manner.

5. The integrated condenser according to claim 1, characterized in that: The front half (7) and rear half (6) of the condenser are respectively provided with independent hot well structures (9,8). The two hot wells are connected by a U-shaped drain pipe (10). The U-shaped drain pipe (10) has a certain height to form a water seal structure. Both hot well structures (8,9) are equipped with water level monitoring devices and emergency drain valves.

6. The integrated condenser according to claim 3, characterized in that: The first water chamber (1) is connected to the return water pipe of the heating network circulation, and the fifth water chamber (2) is connected to the inlet of the next stage heater.

7. The integrated condenser according to claim 1, characterized in that: The front half (7) of the condenser is connected to the turbine exhaust pipe through the first throat, and the rear half (6) of the condenser is connected to the exhaust pipe of the booster or small back pressure turbine through the second throat.

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