Thickening and energy-saving device utilizing combined heat and power generation

Abstract

The invention relates to the technical field of combined heat and power generation, mineral separation thickening and mining combined production, in particular to a thickening and energy-saving device utilizing combined heat and power generation, which comprises a heat and power circulating system and a thickening system, the thermoelectric circulating system comprises a boiler, a superheater, an air exhaust type steam turbine and a heat consumer which are sequentially and circularly connected; the thickening system comprises a central transmission type thickener, and a rake is arranged on a central shaft of the central transmission type thickener; the mechanical energy output end of the air extraction type steam turbine is connected with the center shaft so as to drive the rake to rotate. Compared with the prior art, the combined heat and power generation is combined with mine enterprises, multiple purposes are achieved through one set of equipment, and the combined heat and power generation device has the advantages of being high in energy utilization efficiency, saving the cost, protecting the environment and the like.

Description

Technical Field

[0001] The invention relates to the technical fields of cogeneration of heat and power, ore dressing and thickening, and mining, and in particular to a thickening and energy-saving device utilizing cogeneration of heat and power. Background Art

[0002] Mining enterprises are located in remote areas and generally do not have centralized heating. Mineral processing plants are mostly heated by small steam boilers. Cogeneration is a technology that comprehensively utilizes energy. While generating electricity, it effectively uses the latent heat of vaporization for heating. The steam turbine converts thermal energy into mechanical energy, and the generator converts mechanical energy into electrical energy. However, the transfer of energy is inevitably accompanied by loss.

[0003] Since the high-temperature flue gas generated by coal combustion cannot directly work, the steam turbine needs to transfer heat to steam through the boiler, and the high-temperature and high-pressure steam drives the steam turbine generator set to generate electricity. The low-grade steam turbine extraction steam or back pressure exhaust steam after work is used for heating. This system technology is mature, but the load regulation ability is poor, the power generation efficiency is low, and it uses coal as fuel. New gas cogeneration systems rarely use this form.

[0004] Most of the boilers in the ore dressing plant are steam boilers without superheaters, which are only used for heating. They waste a lot of energy and the pressure needs to be adjusted by a pressure reducing valve. For coal mines, gas boilers are not suitable and difficult to achieve. As an indispensable equipment in the ore dressing plant, the thickener uses electricity and is driven by the transmission mechanism to make circular motion in the pool to stir and concentrate the ore pulp. It is an "electricity consuming expert" in the ore dressing plant.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the present invention provides a dense and energy-saving device using cogeneration to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A thickening and energy-saving device utilizing cogeneration of heat and power, comprising a thermoelectric cycle system and a thickening system;

[0009] The thermoelectric cycle system comprises a boiler, a superheater, an extraction steam turbine and a heat user which are connected in a cycle in sequence;

[0010] The thickening system comprises a central transmission thickener, on the central shaft of which a rake is arranged; the mechanical energy output end of the exhaust steam turbine is connected to the central shaft to drive the rake to rotate.

[0011] Preferably, a telescopic connecting rod is provided at the upper end of the central shaft, a gear is provided at the top end of the telescopic connecting rod, and a gear meshing with the gear at the top end of the telescopic connecting rod is also provided at the mechanical energy output end of the extraction steam turbine.

[0012] Preferably, a generator is also provided at the mechanical energy output end of the extraction steam turbine.

[0013] Preferably, a heat exchange plate is provided on the cylinder wall of the central transmission thickener, and a heat exchange channel is provided inside the heat exchange plate.

[0014] Preferably, the inlet of the heat exchange channel is connected to the back pressure outlet of the extraction steam turbine.

[0015] Preferably, the outlet of the heat exchange channel is connected to the boiler via a cooling water pump.

[0016] Preferably, a condenser is also connected to the back pressure outlet of the extraction steam turbine, and a dilute lithium bromide solution is passed into the condenser to perform heat exchange with the back pressure steam of the extraction steam turbine.

[0017] Preferably, the steam outlet of the condenser is connected to the boiler.

[0018] Preferably, the steam outlet of the condenser and the outlet of the heat exchange channel are both connected to the boiler via a condensate pump.

[0019] Preferably, both the outlet of the condensate pump and the outlet of the heat user are connected to the boiler via a heater.

[0020] Compared with the prior art, the dense and energy-saving device using cogeneration of heat and power proposed by the present invention has the following advantages:

[0021] 1. The present invention proposes a dense and energy-saving device that utilizes cogeneration, combines cogeneration with mining enterprises, and a set of equipment can achieve multiple uses. It has many advantages such as high energy utilization efficiency, cost savings, and environmental protection.

[0022] 2. The present invention proposes a thickening and energy-saving device using cogeneration. The back pressure of the exhaust steam turbine can be used for winter heating of heat users; the excess mechanical energy of the thickening equipment can drive the generator to generate electricity. Heat exchange plates are arranged on the four walls around the thickener to form a natural cooling tower. In the non-heating season, the back pressure of the steam turbine can be used to heat the thickener, evaporate excess water, further utilize energy, and improve the thickening efficiency of the thickener.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic structural diagram of a dense and energy-saving device utilizing cogeneration of heat and power provided in an embodiment of the present invention.

[0026] Figure 2 A schematic diagram of the structure of a heat exchange plate in a dense and energy-saving device utilizing cogeneration of heat and power provided by an embodiment of the present invention.

[0027] The diagram is as follows:

[0028] 100. Thermoelectric cycle system; 200. Thickening system.

[0029] 110. Boiler; 120. Superheater; 130. Extraction steam turbine; 140. Heat user; 150. Heater; 160. Condenser; 170. Water pump; 180. Condensate pump.

[0030] 210, gear; 220, retractable connecting rod; 230, central axis; 240, heat exchange plate; 241, heat exchange channel; 250, generator; 260, cooling water pump. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0032] An embodiment of the present invention provides a thickening and energy-saving device using cogeneration, including a thermoelectric cycle system 100 and a thickening system 200; the thermoelectric cycle system 100 includes a boiler 110, a superheater 120, an exhaust steam turbine 130, and a heat user 140 that are cyclically connected in sequence; the thickening system 200 includes a central transmission thickener, and a rake is arranged on the central shaft 230 of the central transmission thickener; the mechanical energy output end of the exhaust steam turbine 130 is connected to the central shaft 230 to drive the rake to rotate.

[0033] The present invention combines the cogeneration cycle with the thickening equipment, and one machine has multiple uses. It not only improves the utilization and efficiency of the boiler 110, but also combines the use of the thickener to eliminate the loss caused by energy conversion, achieving multiple goals at one stroke. A superheater 120 is added after the boiler 110. The saturated steam obtained by heating the boiler 110 is further heated to the superheating temperature through the superheater 120. The high-temperature and high-pressure steam enters the exhaust steam turbine 130, and the steam turbine converts the thermal energy into mechanical energy. The thickener removes the traditional driving device (generally including a hydraulic pump, a hydraulic motor, a motor, a reducer, etc.) and uses a steam turbine to drive it.

[0034] In a thickening and energy-saving device using cogeneration provided by an embodiment of the present invention, a telescopic connecting rod 220 is provided at the upper end of the central shaft 230, a gear 210 is provided at the top of the telescopic connecting rod 220, and a gear 210 meshing with the gear 210 at the top of the telescopic connecting rod 220 is also provided at the mechanical energy output end of the exhaust steam turbine 130. The present invention changes the rotation direction by meshing the gear 210, connects the thickener central shaft 230, drives the rake to rotate, and realizes the thickening function.

[0035] In a thickening and energy-saving device using cogeneration provided by an embodiment of the present invention, a generator 250 is also provided at the mechanical energy output end of the exhaust steam turbine 130. In the present invention, the excess mechanical energy can be connected to the generator 250 to continue to generate electricity, and can also provide electricity for the enterprise when there is no production. At this time, the telescopic connecting rod 220 is lowered, and the gear 210 on the telescopic connecting rod 220 is disengaged from the gear 210 at the mechanical energy output end of the exhaust steam turbine 130, so that the mechanical energy output end of the exhaust steam turbine 130 is directly connected to the generator 250, which can drive the generator 250 to generate electricity. The present invention increases the flexibility of the device, not only taking into account the use conditions of different situations and seasons, but also through this device, the electricity consumption of the thickener is reduced, the loss caused by energy conversion is reduced, and electricity can be generated. A variety of usage methods of one device are realized, which is flexible and convenient.

[0036] In a thickening and energy-saving device using cogeneration provided by an embodiment of the present invention, a heat exchange plate 240 is provided on the cylinder wall of the central transmission thickener, and a heat exchange channel 241 is provided inside the heat exchange plate 240. In the present invention, the low-pressure steam output by the exhaust steam turbine 130 can be sent to the heat user 140 in winter for indoor heating, and the excess steam is transported to the heat exchange plate 240 inside the thickener through a pipeline, and the tailings are heated by waste heat; the water in the thickener is evaporated to improve the thickening efficiency; the steam in the heat exchange plate 240 is cooled to liquid water, and is pumped back to the boiler 110 through the cooling water pump 260 for recycling. In summer, according to user needs, on the one hand, the lithium bromide dilute solution is heated in the condenser 160 through the condenser 160 to generate refrigerant refrigeration; if refrigeration is not required, it can also continue to be sent to the thickener heat exchange plate 240 to complete the above-mentioned thickening cooling step. In this way, heat exchange plates 240 are arranged on the four walls around the thickener to form a natural cooling tower. In the non-heating season, the back pressure of the steam turbine can be used to heat the thickener and evaporate excess water, thereby further utilizing energy and improving the thickening efficiency of the thickener.

[0037] In a dense and energy-saving device using cogeneration provided by an embodiment of the present invention, the inlet of the heat exchange channel 241 is connected to the back pressure outlet of the extraction steam turbine 130. The outlet of the heat exchange channel 241 is connected to the boiler 110 through a cooling water pump 260. The back pressure outlet of the extraction steam turbine 130 is also connected to a condenser 160, and a dilute lithium bromide solution is passed into the condenser 160 to exchange heat with the back pressure steam of the extraction steam turbine 130. The steam outlet of the condenser 160 is connected to the boiler 110. The steam outlet of the condenser 160 and the outlet of the heat exchange channel 241 are both connected to the boiler 110 through a condensate pump 180. The outlet of the condensate pump 180 and the outlet of the heat user 140 are both connected to the boiler 110 through a heater 150, and the water in the heater 150 is returned to the boiler 110 through a pump 170.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. A dense, energy-saving device utilizing cogeneration of heat and power, characterized in that: Including thermoelectric cycle system and thickening system; The thermoelectric cycle system comprises a boiler, a superheater, an extraction steam turbine and a heat user which are connected in a cycle in sequence; The thickening system comprises a central transmission thickener, on the central shaft of which a rake is arranged; the mechanical energy output end of the exhaust steam turbine is connected to the central shaft to drive the rake to rotate.

2. A thickening and energy-saving device using cogeneration of heat and power according to claim 1, characterized in that: A telescopic connecting rod is arranged at the upper end of the central shaft, a gear is arranged at the top end of the telescopic connecting rod, and a gear meshing with the gear at the top end of the telescopic connecting rod is also arranged at the mechanical energy output end of the exhaust steam turbine.

3. A thickening and energy-saving device using cogeneration of heat and power according to claim 2, characterized in that: A generator is also arranged at the mechanical energy output end of the extraction steam turbine.

4. A thickening and energy-saving device using cogeneration of heat and power according to claim 3, characterized in that: A heat exchange plate is arranged on the cylinder wall of the central transmission thickener, and a heat exchange channel is arranged inside the heat exchange plate.

5. A thickening and energy-saving device using cogeneration of heat and power according to claim 4, characterized in that: The inlet of the heat exchange channel is connected to the back pressure outlet of the extraction steam turbine.

6. A thickening and energy-saving device using cogeneration of heat and power according to claim 5, characterized in that: The outlet of the heat exchange channel is connected to the boiler via a cooling water pump.

7. A thickening and energy-saving device using cogeneration of heat and power according to claim 6, characterized in that: A condenser is also connected to the back pressure outlet of the extraction steam turbine, and a dilute lithium bromide solution is introduced into the condenser to exchange heat with the back pressure steam of the extraction steam turbine.

8. A thickening and energy-saving device using cogeneration of heat and power according to claim 7, characterized in that: The steam outlet of the condenser is communicated with the boiler.

9. A thickening and energy-saving device using cogeneration of heat and power according to claim 8, characterized in that: The steam outlet of the condenser and the outlet of the heat exchange channel are both connected to the boiler through a condensate pump.

10. A thickening and energy-saving device using cogeneration of heat and power according to claim 9, characterized in that: The outlet of the condensate pump and the outlet of the heat user are both connected to the boiler through a heater.

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