Novel coke oven waste heat utilization double-super power generation system

Abstract

The utility model provides a novel coke oven waste heat utilization double-super power generation system, which belongs to the technical field of coke oven waste heat utilization and comprises a novel box-type coke oven, an ultra-high-temperature and ultra-high-pressure waste heat boiler, a steam turbine power station and an auxiliary machine room. A steam turbine generator unit is arranged in the steam turbine power station; a water pump, a water tank, a deaerator and a water supply and dosing device are arranged in the auxiliary machine chamber; an ultrahigh-temperature and ultrahigh-pressure main steam pipeline, a low-temperature reheat steam pipeline and a high-temperature reheat steam pipeline are respectively arranged between the steam turbine generator unit and the ultrahigh-temperature and ultrahigh-pressure waste heat boiler; a condensed water pipeline is arranged between the steam turbine generator unit and the water pump; according to the utility model, the steam can be fully utilized under different temperature and pressure conditions, so that the power generation efficiency is improved, the water supply quality and stability of the system are ensured, the problems of corrosion, scaling and the like in the boiler are avoided, and the condensate water can be recycled.

Description

TECHNICAL FIELD

[0001] The utility model belongs to coke oven waste heat utilization technical field, concretely relates to a new type coke oven waste heat utilization double super power generation system. BACKGROUND

[0002] In the patent application No. 202222202901.1, a kind of full dry quenching lower multiple ovens to one machine double super reheated dry quenching coke waste heat power generation system is presented, which realizes that multiple dry quenching coke waste heat boiler is configured with a steam turbine generator unit, with the advantages of less land occupation, small initial investment, low operating cost and high power generation efficiency.

[0003] In prior art, box-type coke oven belongs to internal heating type coking, and the coke oven is composed of several coking units, each coking unit includes a box body, a box top cover, a box bottom plate, a coke oven, a smoke flue and a total flue, and has the characteristics of simple structure, flexible operation, uniform heating and short coking time.

[0004] However, in the power generation system of box-type coke oven, the power generation efficiency needs to be improved, and the water quality in the traditional system is unstable, which can easily cause corrosion, scaling and other problems in the boiler, and the condensed water is not recycled. UTILITY MODEL CONTENTS

[0005] Based on the above technical problems, the utility model provides a new type coke oven waste heat utilization double super power generation system, which can fully utilize steam under different temperature and pressure conditions, thereby improving power generation efficiency and ensuring water supply quality and stability of the system, avoiding corrosion, scaling and other problems in the boiler, and recycling condensed water.

[0006] The specific technical scheme is as follows:

[0007] A new type coke oven waste heat utilization double super power generation system, comprising: a new type box-type coke oven, an ultra-high temperature and ultra-high pressure waste heat boiler, a steam turbine power station and an auxiliary machine room; the steam turbine power station is provided with a steam turbine generator set; the auxiliary machine room is provided with a water pump, a water tank, a deaerator and a water supply dosing device; the steam turbine generator set and the ultra-high temperature and ultra-high pressure waste heat boiler are respectively provided with an ultra-high temperature and ultra-high pressure main steam pipeline, a low-temperature reheated steam pipeline and a high-temperature reheated steam pipeline; the steam turbine generator set and the water pump are provided with a condensate water pipeline.

[0008] In addition, the new type coke oven waste heat utilization double super power generation system provided in the above technical scheme of the utility model can also have the following additional technical features:

[0009] In the technical scheme, the steam turbine generator set comprises a steam turbine, a generator and a condenser; the steam turbine is internally provided with a high-pressure cylinder and a low-pressure cylinder; a super-high-temperature and super-high-pressure main steam pipeline is connected with an inlet of the high-pressure cylinder; a low-temperature reheat steam pipeline is connected with an exhaust port of the high-pressure cylinder; an inlet of a high-temperature reheat steam pipeline is connected with the low-pressure cylinder; an input end of the condenser is connected with an exhaust port of the low-pressure cylinder, and an output end of the condenser is connected with a water pump.

[0010] In the technical scheme, the feed water dosing device comprises three dosing tanks and three electromagnetic valves; the discharge outlets of the dosing tanks are connected with the deaerators through connecting pipes, and the discharge outlets of the three dosing tanks are respectively provided with the three electromagnetic valves.

[0011] In the technical scheme, the high-temperature flue gas generated by the new box-type coke oven is sent to the super-high-temperature and super-high-pressure waste heat boiler, and the super-high-temperature and super-high-pressure main steam is generated by the super-high-temperature and super-high-pressure waste heat boiler.

[0012] Compared with the prior art, the novel coke oven waste heat utilization double-super power generation system has the beneficial effects that:

[0013] 1. Through the design of the super-high-temperature and super-high-pressure main steam pipeline, the low-temperature reheat steam pipeline and the high-temperature reheat steam pipeline, the steam can be fully utilized under different temperature and pressure conditions, the heat loss is reduced, the utilization rate of the heat in the high-temperature flue gas generated by the box-type coke oven is improved, and the power generation efficiency is improved; and through the setting of the condensate pipeline, the water recycling effect after steam condensation is realized, and the energy efficiency and environmental protection of the system are further enhanced.

[0014] 2. Through the combination of the water pump, the water tank, the deaerator and the feed water dosing device, the water supply quality and stability of the system are ensured; through the deaerator, the oxygen content in the boiler feed water is reduced, thereby reducing the risk of oxidation corrosion in the boiler and prolonging the service life of the equipment; and through the feed water dosing device, different chemical agents are added into the water to adjust the water quality, thereby further reducing the oxygen content in the water and adjusting the pH value to prevent scaling. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a schematic view of the novel coke oven waste heat utilization double-super power generation system of the utility model;

[0016] Fig. 2 It is a schematic view of the feed water dosing device and the water tank of the utility model;

[0017] Among them, Figs. 1-2 The correspondence between the reference signs and the component names in the drawings is as follows:

[0018] 10 New type box-type coke oven, 11 Ultra-high temperature and ultra-high pressure waste heat boiler, 12 Steam turbine power station, 13 Auxiliary machine room, 14 Ultra-high temperature and ultra-high pressure main steam pipeline, 15 Low temperature reheat steam pipeline, 16 High temperature reheat steam pipeline, 17 Condensate pipeline, 18 Water pump, 19 Water tank, 20 Deaerator, 21 Chemical dosing tank, 22 Solenoid valve. Detailed Implementation

[0019] The following are specific implementation cases and appendices. Figs. 1-2 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0020] A novel dual-superheater power generation system for utilizing waste heat from coke ovens, such as Figs. 1-2 As shown, it includes: a new type of box-type coke oven 10, an ultra-high temperature and ultra-high pressure waste heat boiler 11, a steam turbine power station 12, and an auxiliary machine room 13; the steam turbine power station 12 is equipped with a steam turbine generator set; the auxiliary machine room 13 is equipped with a water pump 18, a water tank 19, a deaerator 20, and a feedwater dosing device; an ultra-high temperature and ultra-high pressure main steam pipeline 14, a low temperature reheat steam pipeline 15, and a high temperature reheat steam pipeline 16 are respectively provided between the steam turbine generator set and the ultra-high temperature and ultra-high pressure waste heat boiler 11; a condensate pipeline 17 is provided between the steam turbine generator set and the water pump 18.

[0021] By adopting the above structure, the design of the ultra-high temperature and ultra-high pressure main steam pipeline 14, the low temperature reheat steam pipeline 15, and the high temperature reheat steam pipeline 16 allows steam to be fully utilized under different temperature and pressure conditions, reducing heat loss and thus improving the utilization rate of heat in the high-temperature flue gas generated by the box-type coke oven, thereby improving power generation efficiency. Furthermore, the condensate pipeline 17 enables the recycling of water after steam condensation, further enhancing the system's energy efficiency and environmental friendliness. The combined use of the water pump 18, water tank 19, deaerator 20, and feedwater dosing device ensures the quality and stability of the system's water supply. The deaerator 20 reduces the oxygen content in the boiler feedwater, thereby reducing the risk of oxidation and corrosion inside the boiler and extending the equipment's service life. The feedwater dosing device adds different chemical agents to the water to adjust the water quality, further reducing the oxygen content and adjusting the pH value to prevent scaling.

[0022] In an embodiment of this utility model, the steam turbine generator set includes: a steam turbine, a generator, and a condenser; the steam turbine is equipped with a high-pressure cylinder and a low-pressure cylinder; the ultra-high temperature and ultra-high pressure main steam pipeline 14 is connected to the steam inlet of the high-pressure cylinder; the low temperature reheat steam pipeline 15 is connected to the steam outlet of the high-pressure cylinder; the steam inlet of the high temperature reheat steam pipeline 16 is connected to the low-pressure cylinder; the input end of the condenser is connected to the steam outlet of the low-pressure cylinder, and the output end of the condenser is connected to the water pump 18.

[0023] Ultra-high temperature and ultra-high pressure steam is discharged from the ultra-high temperature and ultra-high pressure waste heat boiler 11 and transported to the high-pressure cylinder through the ultra-high temperature and ultra-high pressure main steam pipeline 14. The ultra-high temperature and ultra-high pressure steam begins to do work, driving the generator to operate. The steam discharged from the high-pressure cylinder enters the ultra-high temperature and ultra-high pressure waste heat boiler through the low temperature reheat steam pipeline 15 for reheat treatment. The treated ultra-high temperature and ultra-high pressure steam enters the low-pressure cylinder through the high temperature reheat steam pipeline 16, allowing it to expand further under lower pressure to do work, so as to make full use of the remaining energy. This arrangement can effectively increase the output power of the low-pressure cylinder, thereby improving the overall power generation efficiency.

[0024] After the steam completes its work in the generator, it enters the condenser and condenses into water, which then flows through the condensate pipe 17 and the water pump 18 into the water tank 19 for recycling.

[0025] In an embodiment of this utility model, the water supply dosing device includes: three dosing tanks 21 and three solenoid valves 22; the outlets of the dosing tanks 21 are respectively connected to the deaerator 20 through connecting pipes, and three solenoid valves 22 are respectively provided at the outlets of the three dosing tanks 21.

[0026] Specifically, the three dosing tanks 21 are filled with deoxygenating agent, phosphate and ammonia respectively. The deoxygenating agent can reduce the oxygen content in the boiler feedwater, while the phosphate and ammonia can adjust the pH value of the boiler feedwater.

[0027] In an embodiment of this utility model, the high-temperature flue gas produced by the novel box-type coke oven is sent to an ultra-high temperature and ultra-high pressure waste heat boiler, which produces ultra-high temperature and ultra-high pressure main steam.

[0028] Using ultra-high temperature and ultra-high pressure main steam to do work on steam turbine generator sets can effectively improve power generation efficiency.

[0029] Implementation Process: The high-temperature flue gas produced by the new box-type boiler is supplied to the ultra-high temperature and ultra-high pressure waste heat boiler 11. After heat exchange in the ultra-high temperature and ultra-high pressure waste heat boiler, the boiler feedwater supplied to the ultra-high temperature and ultra-high pressure waste heat boiler from the auxiliary machine room 13 is heated to the ultra-high temperature and ultra-high pressure parameters of main steam. The temperature of this main steam is 570 degrees Celsius and the pressure is 13.8 MPa. The ultra-high temperature and ultra-high pressure main steam with the above parameters is sent into the steam turbine generator set to generate electricity. After the ultra-high temperature and ultra-high pressure main steam does work in the high-pressure cylinder of the steam turbine, the low-temperature steam is returned to the ultra-high temperature and ultra-high pressure waste heat boiler for reheating through the low-temperature reheat steam pipeline 15. That is, the reheated steam is high-temperature reheat steam, which is sent into the low-pressure cylinder of the steam turbine through the high-temperature reheat steam pipeline 16 to do work, thereby effectively improving the heat utilization efficiency of the high-temperature flue gas produced by the new box-type coke oven 10. The condenser condenses the steam discharged from the low-pressure cylinder. The condensed water enters the water tank 19 through the condensate pipe 17 and the water pump 18 for recycling. Different chemical agents are added to the three dosing tanks 21 to adjust the water quality, reduce the oxygen content in the water, optimize the pH value of the water, prevent structural phenomena, and thus ensure the efficient and stable operation of the entire system.

[0030] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0031] In the description of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel dual-superheater power generation system for utilizing waste heat from coke ovens, characterized in that, include: The system includes a new type of box-type coke oven, an ultra-high temperature and ultra-high pressure waste heat boiler, a steam turbine power station, and an auxiliary equipment room. The steam turbine power station is equipped with a steam turbine generator set. The auxiliary equipment room is equipped with a water pump, a water tank, a deaerator, and a feedwater dosing device. The steam turbine generator set and the ultra-high temperature and ultra-high pressure waste heat boiler are respectively connected by an ultra-high temperature and ultra-high pressure main steam pipeline, a low temperature reheat steam pipeline, and a high temperature reheat steam pipeline. A condensate pipeline is connected between the steam turbine generator set and the water pump.

2. The novel coke oven waste heat utilization dual-superheater power generation system according to claim 1, characterized in that, The steam turbine generator set includes: a steam turbine, a generator, and a condenser; the steam turbine is equipped with a high-pressure cylinder and a low-pressure cylinder; the ultra-high temperature and ultra-high pressure main steam pipeline is connected to the steam inlet of the high-pressure cylinder; the low temperature reheat steam pipeline is connected to the steam outlet of the high-pressure cylinder; the steam inlet of the high temperature reheat steam pipeline is connected to the low-pressure cylinder; the input end of the condenser is connected to the steam outlet of the low-pressure cylinder, and the output end of the condenser is connected to the water pump.

3. The novel coke oven waste heat utilization dual-superheater power generation system according to claim 2, characterized in that, The water supply dosing device includes three dosing tanks and three solenoid valves; the outlets of the dosing tanks are connected to the deaerators via connecting pipes, and each of the three dosing tanks is equipped with a solenoid valve at its outlet.

4. A novel coke oven waste heat utilization dual-superheater power generation system according to claim 3, characterized in that, The high-temperature flue gas produced by the novel box-type coke oven is sent to an ultra-high temperature and ultra-high pressure waste heat boiler, which produces ultra-high temperature and ultra-high pressure main steam.

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