Unilateral power generation device of waste heat power generation turboset

Abstract

The utility model provides a unilateral power generation device of a waste heat power generation steam turbine set, which belongs to the technical field of power generation steam turbines and comprises a high-pressure steam turbine, an air inlet pipe, a high-pressure power generator, an n-shaped pipe, a low-pressure steam turbine, a low-pressure power generator, a low-pressure exhaust pipe, a high-pressure exhaust pipe and a transverse pipe. The left end of a rotating shaft of the high-pressure steam turbine is connected with the high-pressure generator, an n-shaped pipe penetrates through the exhaust end of the high-pressure steam turbine, a first valve is installed on the n-shaped pipe, and the right side of the n-shaped pipe penetrates through the air inlet end of the low-pressure steam turbine; when the boiler is shut down or overhauled to cause insufficient steam supply and cannot meet the demand of double-side power generation, the first valve and the second valve are closed, the third valve is opened, and steam enters from the air inlet pipe to drive the rotating shaft on the high-pressure steam turbine to rotate and drive the high-pressure power generator to generate power, so that the effect of single-side power generation is realized; and waste gas can be exhausted through the high-pressure exhaust pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of power generation steam turbine, especially relates to a waste heat power generation steam turbine unit single side power generation device. BACKGROUND

[0002] The existing waste heat power generation steam turbine unit is usually designed as a double side power generation mode, that is, the medium pressure steam generated by a boiler is used to drive the steam turbine unit to work, and then drive two generators to generate electricity, however, in the actual operation process, due to the boiler, the steam supply is insufficient due to shutdown or maintenance, and the demand of double side power generation cannot be met, at this time, due to the process limitation of the steam turbine and the limitation of the single side power generation of the generator, the system can only be forced to soft stop, and the excess steam is exhausted, which not only causes great waste of energy, but also affects the stability and economy of the power system.

[0003] In the prior art, the patent with the authorized announcement number CN219262460U discloses a waste heat power generation steam turbine unit single side power generation device, the temperature of the low pressure steam turbine and the condenser is reduced to 35 DEG C, and the pressure is reduced to 0.05 bar; the medium pressure exhaust is automatically controlled, and the exhaust pressure is more stable; the desalted water is used for heat exchange and cooling of the generator and the steam turbine to reduce the consumption of water and electricity; a large amount of exhaust is reduced when the steam quantity is low, and electric energy is recovered.

[0004] However, the high pressure steam turbine and the low pressure steam turbine are connected with a single generator, in the process of normal use, the high pressure steam enters the high pressure steam turbine, drives the rotating shaft in the high pressure steam turbine to rotate, the decompressed gas enters the low pressure steam turbine, and drives the rotating shaft on the low pressure steam turbine to rotate, the low pressure steam turbine and the high pressure steam turbine are connected with the same generator, which is not conducive to normal power generation, and the device does not set a waste heat recovery device to recover the steam, so that the utilization of heat in the steam is affected, therefore, the waste heat power generation steam turbine unit single side power generation device is designed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the problems in the above background art, and provides a waste heat power generation steam turbine unit single side power generation device.

[0006] The utility model aims at solving the problems in the above background art, and provides a waste heat power generation steam turbine unit single side power generation device.

[0007] The utility model provides a kind of waste heat power generation steam turbine unit single-sided power generation device, including high-pressure turbine, air inlet pipe, high-voltage generator, n-shaped pipe, low-pressure turbine, low-voltage generator, low-pressure exhaust pipe, high-pressure exhaust pipe, and cross pipe, the air inlet pipe is installed in the air inlet end of high-pressure turbine, the left end of the rotating shaft of high-pressure turbine is connected with high-voltage generator, the exhaust end of high-pressure turbine is provided with n-shaped pipe, first valve is installed on n-shaped pipe, the right side of n-shaped pipe is provided in the air inlet end of low-pressure turbine, the right end of the rotating shaft of low-pressure turbine is connected with low-voltage generator, the exhaust end of low-pressure turbine is provided with low-pressure exhaust pipe, second valve is installed on low-pressure exhaust pipe, the right end of the outer surface of high-pressure turbine is additionally provided with high-pressure exhaust pipe, third valve is installed on high-pressure exhaust pipe.

[0008] Preferably, the outer end of the low-pressure exhaust pipe and the high-pressure exhaust pipe is provided with a cross pipe, and the outer end of the cross pipe is provided with a waste heat recovery device.

[0009] Preferably, the waste heat recovery device comprises a waste heat recovery cylinder, an exhaust pipe, a condensate collecting cylinder, a cold water inlet pipe and a hot water outlet pipe, the bottom inner end of the waste heat recovery cylinder is provided with the exhaust pipe, the exhaust pipe is provided with the condensate collecting cylinder, the lower outer surface of the waste heat recovery cylinder is provided with the cold water inlet pipe, the upper outer surface of the waste heat recovery cylinder is provided with the hot water outlet pipe, and the condensate collecting cylinder is provided with a float valve.

[0010] Preferably, the inner side of the waste heat recovery cylinder is spiral, and the end of the exhaust pipe penetrates the central upper surface of the waste heat recovery cylinder.

[0011] Preferably, the exhaust pipe is made of copper material with good heat conduction performance.

[0012] Preferably, when the condensate level in the condensate collecting cylinder is equal to the bottom level of the inner side of the exhaust pipe, the float valve is in an open state.

[0013] Compared with the prior art, the utility model has at least the following beneficial effects:

[0014] 1、The utility model discloses a high-voltage generator and a low-voltage generator, when the waste heat power generation steam turbine unit works normally, open the first valve and the second valve, and close the third valve, steam enters the high-pressure turbine through the air inlet pipe, drives the rotating shaft on the high-pressure turbine to rotate, drives the high-voltage generator to generate electricity, the steam discharged by the high-pressure turbine enters the low-pressure turbine from the n-shaped pipe, drives the rotating shaft on the low-pressure turbine to rotate, drives the low-voltage generator to generate electricity, the high-pressure turbine 1 and the low-pressure turbine are connected with different generators respectively, to ensure the normal work of the generator.

[0015] 2、The utility model discloses when the boiler is shut down or overhauled and leads to insufficient steam supply, cannot satisfy the demand of bilateral power generation, closes the first valve and the second valve, opens the third valve, and steam enters from the air inlet pipe, drives the rotation of the rotating shaft on the high-pressure steam turbine, drives the high-voltage generator to generate electricity, realizes the effect of unilateral power generation, and waste gas can be discharged through the high-pressure exhaust pipe.

[0016] 3、The utility model discloses through be provided with the waste heat recovery device, in the process that the power generation steam turbine unit bilateral power generation or unilateral power generation, waste gas can enter the transverse pipe through the low -pressure exhaust pipe or high -pressure exhaust pipe, and enter the spiral part in the waste heat recovery cylinder through the waste gas discharge pipe, and the heat in the waste gas exchanges heat condenses with the waste gas discharge pipe, and the cold water enters the pipe and enters the waste heat recovery cylinder, and the water exchanges heat with the heat on the waste gas discharge pipe, realize the effect of heating to the cold water, and the hot water is discharged from the hot water discharge pipe, realize the effect of waste heat recovery of waste gas, and the condensate in the waste gas discharge pipe flows to the condensate collection cylinder, when the level height in the condensate collection cylinder reaches certain height, the float ball valve opens, and the condensate is discharged, prevent the water in the condensate collection cylinder from entering the waste gas discharge pipe. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0018] Figure 1 It is the whole structure perspective schematic drawing of the utility model.

[0019] Figure 2 It is the waste heat recovery device perspective structure schematic drawing of the utility model.

[0020] Figure 3 It is the waste heat recovery device section structure schematic drawing of the utility model.

[0021] Figure 4 It is the waste heat recovery device perspective structure schematic drawing of the utility model Figure 3 It is the enlarged structure schematic drawing of A place.

[0022] [REFERENCE SIGNS]

[0023] 1. High-pressure steam turbine; 2. Inlet pipe; 3. High-pressure generator; 4. N-shaped pipe; 401. First valve; 5. Low-pressure steam turbine; 6. Low-pressure generator; 7. Low-pressure exhaust pipe; 701. Second valve; 8. High-pressure exhaust pipe; 801. Third valve; 9. Horizontal pipe; 10. Waste heat recovery cylinder; 1001. Exhaust gas discharge pipe; 1002. Condensate collection cylinder; 1003. Cold water inlet pipe; 1004. Hot water outlet pipe; 1005. Float valve. Detailed Implementation

[0024] Example:

[0025] like Figures 1-4 As shown, an embodiment of this utility model provides a single-sided power generation device for a waste heat power generation turbine unit, including a high-pressure turbine 1, an intake pipe 2, a high-pressure generator 3, an n-shaped pipe 4, a low-pressure turbine 5, a low-pressure generator 6, a low-pressure exhaust pipe 7, a high-pressure exhaust pipe 8, and a horizontal pipe 9. The intake end of the high-pressure turbine 1 is equipped with the intake pipe 2. The left end of the shaft of the high-pressure turbine 1 is connected to the high-pressure generator 3. The exhaust end of the high-pressure turbine 1 is provided with the n-shaped pipe 4, and a first valve 401 is installed on the n-shaped pipe 4. The right side of the n-shaped pipe 4 is provided with the intake end of the low-pressure turbine 5. The right end of the shaft of the low-pressure turbine 5 is connected to the low-pressure generator 6. The left and right exhaust ends of the low-pressure turbine 5 are both provided with low-pressure exhaust pipes 7, and a second valve 701 is installed on the low-pressure exhaust pipe 7. A high-pressure exhaust pipe 8 is added to the right end of the outer surface of the high-pressure turbine 1, and a third valve 801 is installed on the high-pressure exhaust pipe 8.

[0026] By setting up a high-pressure generator 3 and a low-pressure generator 6, when the waste heat power generation turbine unit is working normally, the first valve 401 and the second valve 701 are opened, and the third valve 801 is closed. Steam enters the high-pressure turbine 1 through the inlet pipe 2, which drives the shaft on the high-pressure turbine 1 to rotate, thereby driving the high-pressure generator 3 to generate electricity. The steam discharged from the high-pressure turbine 1 enters the low-pressure turbine 5 through the n-shaped pipe 4, which drives the shaft on the low-pressure turbine 5 to rotate, thereby driving the low-pressure generator 6 to generate electricity. The high-pressure turbine 1 and the low-pressure turbine 5 are connected to different generators to ensure the normal operation of the generators.

[0027] When the boiler is shut down or under maintenance, resulting in insufficient steam supply and inability to meet the demand for dual-sided power generation, the first valve 401 and the second valve 701 are closed, and the third valve 801 is opened. Steam enters from the inlet pipe 2, drives the shaft on the high-pressure turbine 1 to rotate, drives the high-pressure generator 3 to generate electricity, and achieves the effect of single-sided power generation. Exhaust gas can be discharged through the high-pressure exhaust pipe 8.

[0028] In this embodiment, a horizontal pipe 9 is provided through the outer ends of both the low-pressure exhaust pipe 7 and the high-pressure exhaust pipe 8, and a waste heat recovery device is provided through the outer ends of the horizontal pipe 9.

[0029] In the embodiment, the waste heat recovery device comprises a waste heat recovery cylinder 10, a waste gas discharge pipe 1001, a condensed water collecting cylinder 1002, a cold water inlet pipe 1003 and a hot water outlet pipe 1004, the waste gas discharge pipe 1001 is arranged through the inner end of the bottom of the waste heat recovery cylinder 10, the condensed water collecting cylinder 1002 is arranged through the waste gas discharge pipe 1001, the cold water inlet pipe 1003 is arranged through the lower side surface of the waste heat recovery cylinder 10, the hot water outlet pipe 1004 is arranged through the upper side surface of the waste heat recovery cylinder 10, and the condensed water collecting cylinder 1002 is arranged with a float ball valve 1005.

[0030] In the embodiment, the waste gas discharge pipe 1001 is in a spiral shape in the inner side part of the waste heat recovery cylinder 10, and the end of the waste gas discharge pipe 1001 is arranged through the center of the upper surface of the waste heat recovery cylinder 10, so as to facilitate the discharge of waste gas.

[0031] In the embodiment, the waste gas discharge pipe 1001 is made of copper material with good heat conduction performance, so as to increase the heat exchange effect.

[0032] In the embodiment, when the condensed water level in the condensed water collecting cylinder 1002 is equal to the bottom level of the waste gas discharge pipe 1001, the float ball valve 1005 is in an open state, so as to prevent the condensed water in the condensed water collecting cylinder 1002 from entering the waste gas discharge pipe 1001.

[0033] In the process of double-side power generation or single-side power generation of the power generation steam turbine set, the waste gas can enter the transverse pipe 9 through the low-pressure exhaust pipe 7 or the high-pressure exhaust pipe 8, and then enter the spiral part in the waste heat recovery cylinder 10 through the waste gas discharge pipe 1001, so that the heat in the waste gas is exchanged with the waste gas discharge pipe 1001 to be condensed, the cold water enters the waste heat recovery cylinder 10 from the cold water inlet pipe 1003, the water exchanges heat with the heat on the waste gas discharge pipe 1001 to achieve the effect of heating the cold water, the hot water is discharged from the hot water outlet pipe 1004 to achieve the effect of waste heat recovery, and the condensed water in the waste gas discharge pipe 1001 flows into the condensed water collecting cylinder 1002, when the level in the condensed water collecting cylinder 1002 reaches a certain height, the float ball valve 1005 is opened, the condensed water is discharged, and the water in the condensed water collecting cylinder 1002 is prevented from entering the waste gas discharge pipe 1001.

[0034] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for those skilled in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which should also be regarded as the protection range of the utility model, and these will not affect the effect and practicality of the utility model.

Claims

1. A single-sided power generation device of a waste heat power generation steam turbine unit, characterized by: The utility model provides a steam turbine, it includes high pressure steam turbine (1), intake pipe (2), high pressure generator (3), n pipe (4), low pressure steam turbine (5), low pressure generator (6), low pressure exhaust pipe (7), high pressure exhaust pipe (8) and cross pipe (9), the intake pipe (2) is installed to the intake end of high pressure steam turbine (1), the left end of the rotating shaft of high pressure steam turbine (1) is connected with high pressure generator (3), the exhaust end of high pressure steam turbine (1) is provided with n pipe (4) through, the first valve (401) is installed to n pipe (4), the right side of n pipe (4) is provided with the intake end of low pressure steam turbine (5) through, the right end of the rotating shaft of low pressure steam turbine (5) is connected with low pressure generator (6), the left and right sides exhaust end of low pressure steam turbine (5) are provided with low pressure exhaust pipe (7) through, the second valve (701) is installed to low pressure exhaust pipe (7), the right end of the outer surface of high pressure steam turbine (1) is additionally provided with high pressure exhaust pipe (8), the third valve (801) is installed to high pressure exhaust pipe (8).

2. The bottoming cycle steam turbine unit single-sided power generation apparatus according to claim 1, characterized by: The outer end of low pressure exhaust pipe (7) and high pressure exhaust pipe (8) is provided with cross pipe (9) through, the outer end of cross pipe (9) is provided with waste heat recovery device through.

3. The bottoming cycle steam turbine unit single-sided power generation apparatus according to claim 2, characterized by: The waste heat recovery device includes waste heat recovery cylinder (10), exhaust pipe (1001), condensate collecting cylinder (1002), cold water inlet pipe (1003) and hot water outlet pipe (1004), the bottom inner end of waste heat recovery cylinder (10) is provided with exhaust pipe (1001) through, the exhaust pipe (1001) is provided with condensate collecting cylinder (1002) through, the outer surface below of waste heat recovery cylinder (10) is provided with cold water inlet pipe (1003) through, the outer surface above of waste heat recovery cylinder (10) is provided with hot water outlet pipe (1004) through, the condensate collecting cylinder (1002) is provided with float ball valve (1005) through.

4. The bottoming cycle steam turbine unit single-sided power generation apparatus according to claim 3, characterized by: The inner side portion of exhaust pipe (1001) in waste heat recovery cylinder (10) is spiral, and the end of exhaust pipe (1001) is provided with the upper surface center of waste heat recovery cylinder (10) through.

5. The bottoming cycle steam turbine unit single-sided power generation apparatus according to claim 4, characterized by: The exhaust pipe (1001) is copper material with good heat conduction performance.

6. The bottoming cycle steam turbine unit single-sided power generation apparatus according to claim 5, characterized by: When the inner condensate water level height of condensate collecting cylinder (1002) is equal to the bottom level height of exhaust pipe (1001) inner side, the float ball valve (1005) is in open state.

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