Waste heat recovery circular cooler unit capable of improving generating capacity

Abstract

The utility model belongs to the technical field of self-powered equipment of a thermal power plant, and relates to a waste heat recovery circular cooler unit capable of improving generating capacity, which comprises a main steam pocket connected to a steam turbine through a main steam pipeline and connected with a high-parameter evaporator through a steam inlet pipeline. The high-parameter evaporator is connected with the main steam pocket through a water return pipeline, a smoke pipeline is led out of the high-parameter evaporator to be connected with the low-parameter evaporator, the low-parameter evaporator is connected with the sintering circular cooler through a smoke conveying pipeline, the sintering circular cooler is connected to the low-parameter evaporator through a connecting pipeline, and the low-parameter evaporator is connected to the steam supplementing pocket through a steam supplementing pipeline. The steam supplementing steam pocket is connected to the steam turbine through a steam conveying pipeline. According to the utility model, the temperature of sintered ore is introduced into the low-parameter section for secondary utilization, the evaporation capacity of the low-parameter section is improved, the pressure of the steam supplementing steam pocket is further improved, the generating capacity of the steam turbine is more, the generating capacity of per ton of ore is increased, and the operation cost is lower.

Description

Technical Field

[0001] The utility model belongs to the technical field of self-use electric equipment in thermal power plants, and in particular relates to a waste heat recovery ring cooling machine unit for improving power generation. Background Art

[0002] Sintered ore is cooled in the ring cooler by air blast. This air, drawn in from the bottom, is heated as it passes through the hot sinter layer, becoming high-temperature exhaust gas. This high-temperature exhaust gas is introduced into the boiler, where it heats water to generate steam. This steam drives the turbine, which in turn drives the generator, further reducing production costs and achieving energy conservation and consumption reduction.

[0003] After the flue gas temperature of the ring cooler and the high parameter first, second and third stages undergo heat exchange, the cooled sintered ore still has high temperature that can be utilized. However, after the three stages of heat exchange, there is no heat exchange evaporator, resulting in the loss of the high temperature flue gas of 250-280℃ of the sintered ore, causing the flue gas temperature of the sintered ore to not fully play its role.

[0004] Therefore, a waste heat recovery ring cooler unit is proposed to increase power generation. Utility Model Content

[0005] The purpose of the utility model is to provide a waste heat recovery ring cooling machine unit for improving power generation, which has the function of recovering waste heat and utilizing high-temperature flue gas, and solves the problem in the prior art that high-temperature flue gas is lost, resulting in the flue gas temperature of sintered ore not being able to fully play its role.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: the present invention provides a waste heat recovery ring cooler unit for improving power generation, including a main steam drum, the main steam drum is connected to the turbine through a main steam pipe, the main steam drum is connected to the high-parameter evaporator through a steam inlet pipe, the high-parameter evaporator is connected to the main steam drum through a return pipe, the high-parameter evaporator leads out a flue gas pipe to connect to the low-parameter evaporator, the low-parameter evaporator is connected to the sintering ring cooler through a smoke supply pipe, the sintering ring cooler is connected to the low-parameter evaporator through a connecting pipe, the low-parameter evaporator is connected to the supplementary steam drum through a supplementary steam pipe, the supplementary steam drum is connected to the low-parameter evaporator through a return pipe, and the supplementary steam drum is connected to the turbine through a steam supply pipe.

[0007] Preferably, the number of the high-parameter evaporators is 3, which are divided into one section, two sections and three sections according to different set temperatures.

[0008] Preferably, the number of the steam inlet pipes and the return water pipes corresponds to the number of high-parameter evaporators and is set to 3, and the number of the flue gas pipes corresponds to the number of high-parameter evaporators and is set to 3, and the tail ends are all connected to the low-parameter evaporators.

[0009] Preferably, a circulating fan is provided on the smoke delivery pipe, and a smoke delivery valve is provided at the end of the smoke delivery pipe.

[0010] Preferably, the ends of the smoke delivery pipes are connected to different positions of the sintering ring cooler, and the number of smoke delivery valves is set according to the number of connections of the smoke delivery pipes on the sintering ring cooler.

[0011] Compared with the prior art, the advantages and positive effects of the present invention are:

[0012] 1. The utility model introduces the temperature of sintered ore into the low parameter section for secondary utilization, thereby increasing the evaporation rate in the low parameter section and further increasing the pressure of the supplementary steam drum, which can increase the power generation of the steam turbine, increase the power generation per ton of ore, and reduce the operating cost;

[0013] 2. The utility model has the function of recovering waste heat and utilizing high-temperature flue gas, which solves the problem in the prior art that high-temperature flue gas is lost, causing the flue gas temperature of sintered ore to not fully play its role. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 A schematic diagram of the structure of a waste heat recovery ring cooler unit for increasing power generation;

[0016] In the above figure, 1. Main steam drum, 2. Main steam pipe, 3. Steam turbine, 4. Steam inlet pipe, 5. High-parameter evaporator, 6. Return water pipe, 7. Flue gas pipe, 8. Low-parameter evaporator, 9. Smoke supply pipe, 10. Sintering ring cooler, 11. Circulating fan, 12. Smoke supply valve, 13. Connecting pipe, 14. Supplementary steam pipe, 15. Supplementary steam drum, 16. Return pipe, 17. Steam supply pipe. DETAILED DESCRIPTION

[0017] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0018] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0019] Example 1, as Figure 1 As shown, a waste heat recovery ring cooler unit for increasing power generation includes a main steam drum 1, which is connected to a steam turbine 3 through a main steam pipe 2. The steam turbine 3 receives steam, converts thermal energy into mechanical energy, and drives a generator to generate electricity. The main steam pipe 2 transports the steam in the main steam drum 1 to the steam turbine 3 to ensure efficient steam transportation.

[0020] The main steam drum 1 is connected to the high-parameter evaporator 5 via a steam inlet pipe 4. The high-parameter evaporator 5 uses the high-temperature flue gas in the boiler to heat water, generating high-parameter steam. The steam inlet pipe 4 connects the high-parameter evaporator 5 with the main steam drum 1, ensuring smooth steam inflow and flow. The high-parameter evaporator 5 is connected to the main steam drum 1 via a return pipe 6, which returns the generated cooling water to the high-parameter evaporator 5, forming a cycle and improving heat exchange efficiency.

[0021] The high-parameter evaporator 5 is led out with a flue gas pipe 7 connected to the low-parameter evaporator 8. The low-parameter evaporator 8 converts low-temperature water into steam and utilizes the flue gas from the high-parameter evaporator 5 to increase the steam supply and enhance the power generation capacity. The flue gas pipe 7 connects the high-parameter evaporator 5 and the low-parameter evaporator 8 to transfer the flue gas and realize the efficient use of thermal energy.

[0022] The low-parameter evaporator 8 is connected to the sintering ring cooler 10 via a flue gas duct 9. During the cooling of the sintered ore in the sintering ring cooler 10, heat is transferred via a blast device, and the high-temperature flue gas is recovered through this process. The flue gas duct 9 connects the low-parameter evaporator 8 with the sintering ring cooler 10, ensuring the return and reuse of the flue gas. The sintering ring cooler 10 is connected to the low-parameter evaporator 8 via a connecting pipe 13, which interconnects the sintering ring cooler 10 and the low-parameter evaporator 8.

[0023] The low-parameter evaporator 8 is connected to the supplemental steam drum 15 via a supplemental steam pipe 14. The supplemental steam drum 15 stores recovered steam and supplemental steam, regulates system pressure, and optimizes the power generation process. The supplemental steam pipe 14 transports steam from the supplemental steam drum 15 to the low-parameter evaporator 8, increasing the steam supply. The supplemental steam drum 15 is connected to the low-parameter evaporator 8 via a return pipe 16, which connects the supplemental steam drum 15 and the low-parameter evaporator 8, promoting efficient steam recycling. The supplemental steam drum 15 is connected to the steam turbine 3 via a steam supply pipe 17, which delivers steam from the supplemental steam drum 15 to the steam turbine 3, ensuring sufficient steam supply to the turbine 3 and increasing its output power.

[0024] The following is a detailed description of the design of the above key components:

[0025] The number of high-parameter evaporators 5 is three, which are divided into one, two, and three sections according to the set temperature. The three high-parameter evaporators 5 in the design are divided into one, two, and three sections according to the temperature, and operate in different temperature and pressure ranges, which can optimize the heat exchange efficiency.

[0026] The first-stage evaporator operates in the highest temperature range, converting the high energy in the hot flue gas into steam, achieving maximum steam temperature and pressure. The second-stage evaporator operates in the medium temperature range, further utilizing the residual heat after passing through the first-stage evaporator to increase steam production. The third-stage evaporator operates at a lower temperature, utilizing the remaining thermal energy to ensure that the low-temperature output of the flue gas provides additional energy for steam.

[0027] The number of the steam inlet pipes 4 and the return water pipes 6 corresponds to the number of the high-parameter evaporators 5 and is set to 3, which is designed to be consistent with the number of high-parameter evaporators 5, ensuring that each evaporator has an independent pipe supply and recovery; the number of the flue gas pipes 7 corresponds to the number of the high-parameter evaporators 5 and is set to 3, and the tail ends are all connected to the low-parameter evaporator 8. Each high-parameter evaporator 5 is equipped with an independent flue gas pipe 7 to ensure that the flue gas flow direction is obvious and avoid the loss of thermal efficiency caused by air flow backflow.

[0028] The smoke delivery pipe 9 is provided with a circulation fan 11, which is used to increase the flow speed of the smoke and ensure that the smoke can be effectively guided to the evaporator. A smoke delivery valve 12 is provided at the end of the smoke delivery pipe 9 to adjust the smoke flow as needed. An electric valve can be used to achieve convenient adjustment of the smoke flow and enhance flexibility of use.

[0029] The ends of the smoke delivery pipe 9 are connected to different positions of the sintering ring cooler 10, allowing hot flue gas to be used in different areas of the ring cooler to achieve more uniform heat utilization. The number of smoke delivery valves 12 is set according to the number of connections of the smoke delivery pipe 9 on the sintering ring cooler 10. The corresponding smoke delivery valves 12 are set according to the number of connections of the smoke delivery pipe 9 on the sintering ring cooler 10, which can flexibly control the inflow of flue gas at each position to ensure effective distribution of heat.

[0030] By simulating the low-parameter evaporator 8 as a high-parameter fourth-stage evaporator, the temperature of the final sintered ore from the sintering ring cooler 10 is introduced into the low-parameter evaporator 8 for secondary utilization. This increases the evaporation rate in the low-parameter stage and, in turn, the pressure in the supplemental steam drum 15. This higher supplemental steam pressure increases the supplemental steam pressure of the steam turbine 3, and the load carried by the steam turbine 3 also increases. Consequently, the same amount of sintered ore can generate more power from the steam turbine 3, increasing power generation per ton of ore and reducing operating costs.

[0031] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A waste heat recovery ring cooling unit for increasing power generation, characterized in that: It includes a main steam drum, which is connected to the steam turbine through a main steam pipe. The main steam drum is connected to the high-parameter evaporator through a steam inlet pipe. The high-parameter evaporator is connected to the main steam drum through a return pipe. The high-parameter evaporator is connected to the low-parameter evaporator through a flue gas pipe. The low-parameter evaporator is connected to the sintering ring cooler through a smoke supply pipe. The sintering ring cooler is connected to the low-parameter evaporator through a connecting pipe. The low-parameter evaporator is connected to the supplementary steam drum through a supplementary steam pipe. The supplementary steam drum is connected to the low-parameter evaporator through a return pipe. The supplementary steam drum is connected to the steam turbine through a steam supply pipe.

2. A waste heat recovery ring cooler unit for increasing power generation according to claim 1, characterized in that: There are three high-parameter evaporators, which are divided into one section, two sections and three sections according to different set temperatures.

3. The waste heat recovery ring cooler unit for increasing power generation according to claim 2, characterized in that: The number of the steam inlet pipes and the return water pipes is set to 3 corresponding to the number of high-parameter evaporators, and the number of the flue gas pipes is set to 3 corresponding to the number of high-parameter evaporators, and the tail ends are all connected to the low-parameter evaporators.

4. The waste heat recovery ring cooler unit for increasing power generation according to claim 1, characterized in that: A circulating fan is provided on the smoke delivery pipe, and a smoke delivery valve is provided at the end of the smoke delivery pipe.

5. The waste heat recovery ring cooler unit for increasing power generation according to claim 4, characterized in that: The ends of the smoke delivery pipes are connected to different positions of the sintering ring cooler, and the number of smoke delivery valves is set according to the number of connections of the smoke delivery pipes on the sintering ring cooler.

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