Flue gas refrigerating device at tail part of circular cooler

Abstract

The utility model discloses a ring cooler tail smoke refrigerating device, which relates to the technical field of ring cooler tail smoke recovery, and comprises a smoke hood at the tail of a ring cooler, a smoke pipe is arranged on the smoke hood in a penetrating manner, and one end of the smoke pipe is connected with the tail of the ring cooler; a chimney is arranged at the other end of the smoke pipe, an induced draft fan is arranged in the chimney, and a heat exchanger is arranged at the top of the induced draft fan; one side of the heat exchanger communicates with an absorption refrigerator through a pipeline, and a heat storage water tank is arranged between the heat exchanger and the absorption refrigerator. The absorption refrigerator communicates with a cooling tower and a cold storage water tank through pipelines. According to the device, temperature fluctuation can be effectively balanced through the heat storage water tank and the cold storage water tank, so that the refrigeration process is more stable, efficient refrigeration of the absorption refrigerator is achieved, the actual cold use requirement is met, electricity compression type refrigeration is replaced, and energy loss is reduced; and direct discharge of flue gas at the tail of the circular cooler to the air is reduced, pollution to the environment is avoided, and the effects of energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas recovery at the tail end of an annular cooler, and in particular to a flue gas refrigeration device at the tail end of an annular cooler. Background Art

[0002] During the production process of sintered ore, the hot sintered ore after crushing will generate very high temperature. Generally, a ring cooler is used to cool the sintered ore. The high-temperature flue gas generated at the front of the ring cooler during the heat exchange process is recovered as waste heat. The recovered high-temperature flue gas adopts waste heat power generation technology to produce clean electricity, while the flue gas at the tail of the ring cooler is not utilized and is usually directly discharged, causing environmental pollution.

[0003] In the related art, the flue gas at the tail of the ring cooler is generally above 200°C, which has great value for waste heat recovery and utilization. However, due to the huge temperature difference with the high-temperature flue gas at the front of the ring cooler, if it is used for waste heat power generation, the cost performance is low, and it may even have a counterproductive effect. Currently, steel mills usually use compression refrigeration using electricity, including process cooling and office cooling, which consumes a lot of electricity and leads to high electricity costs. Therefore, there is an urgent need for a device that uses the flue gas at the tail of the ring cooler for refrigeration to avoid energy waste and environmental pollution. Utility Model Content

[0004] The purpose of the utility model is to provide a flue gas refrigeration device at the tail of a ring cooler to solve at least one aspect of the problems and defects raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A flue gas refrigeration device at the tail of a ring cooler, comprising:

[0007] A smoke hood at the rear of the ring cooler, wherein a smoke pipe is provided through the smoke hood, and one end of the smoke pipe is connected to the rear of the ring cooler;

[0008] A chimney is provided at the other end of the smoke pipe, an induced draft fan is provided in the chimney, and a heat exchanger is provided on the top of the induced draft fan;

[0009] One side of the heat exchanger is connected to an absorption refrigerator through a pipeline, and a hot water storage tank is provided between the heat exchanger and the absorption refrigerator;

[0010] The absorption refrigeration machine is connected to a cooling tower and a cold storage water tank through pipelines respectively.

[0011] The flue gas refrigeration device at the tail of the annular cooler according to this solution has at least the following technical effects:

[0012] The flue gas refrigeration device at the tail end of the ring cooler utilizes the heat of the flue gas at the tail end of the ring cooler for cooling, reducing the demand for external energy. The hot water storage tank and the cold water storage tank can effectively balance the temperature fluctuation, making the refrigeration process more stable, realizing the efficient refrigeration of the absorption refrigerator, meeting the actual cooling demand, and replacing the compression refrigeration that uses electricity, effectively reducing energy loss; at the same time, it reduces the direct discharge of flue gas from the tail end of the ring cooler into the air, avoids pollution to the environment, and achieves the effect of energy saving and emission reduction.

[0013] As a further solution of the utility model: a flue gas heat exchange hot water pump is arranged between the heat exchanger and the hot water storage tank.

[0014] Since a flue gas heat exchange hot water pump is arranged between the heat exchanger and the water storage tank, the heat transfer efficiency between the heat exchanger and the water storage tank can be enhanced. The flue gas heat exchange hot water pump can effectively draw cold water from the bottom of the water storage tank into the heat exchanger for heating, and then transport the hot water to the water storage tank, thereby enhancing the heat transfer efficiency, making the water heating process faster and more effective, and improving the water heating efficiency.

[0015] As a further solution of the utility model: a generator heat source hot water pump is arranged between the hot water storage tank and the absorption refrigerator.

[0016] Since a generator heat source hot water pump is provided between the hot water storage tank and the absorption chiller, the hot water on the upper part of the hot water storage tank is transported to the generator of the absorption chiller through the generator heat source hot water pump, and the heat in the hot water is absorbed by the binary solution of the generator of the absorption chiller, and the hot water is cooled and returned to the lower part of the hot water storage tank, so that the hot water in the hot water storage tank can be efficiently transported to the generator of the absorption chiller, ensuring the effective use of heat, and forming a cold and hot water circulation between the heat exchanger, the hot water storage tank and the absorption chiller, which can better recover and utilize the high-temperature flue gas at the tail of the annular chiller, reduce heat loss, and improve the overall energy utilization rate of the device.

[0017] As a further solution of the utility model: a cooling water pump is arranged between the absorption refrigerator and the cooling tower.

[0018] Since a cooling water pump is provided between the absorption chiller and the cooling tower, the cooling water pump can quickly bring the hot water in the absorption chiller to the cooling tower for heat dissipation, thus avoiding the influence of heat accumulation of cooling water in the absorption chiller on the operation of the device, thereby improving the operating safety and stability of the device.

[0019] As a further solution of the utility model: an evaporator chilled water pump is arranged between the absorption refrigerator and the cold storage water tank.

[0020] By setting an evaporator chilled water pump between the absorption chiller and the cold storage water tank, the heat exchange efficiency between the generator in the absorption chiller and the cold storage water tank can be effectively improved, ensuring that the chilled water in the absorption chiller can effectively absorb cold energy and transfer it to the cold storage water tank, thereby enhancing the cooling capacity of the device and improving the cooling efficiency.

[0021] As a further solution of the utility model: the heat exchanger is a gas-liquid heat exchanger.

[0022] Since the heat exchanger is a gas-liquid heat exchanger, it exchanges heat through direct or indirect contact between gas and liquid, thereby achieving efficient heat transfer, maximizing the use of waste heat, reducing the demand for additional energy, thereby reducing energy consumption and improving energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the principle of a flue gas refrigeration device at the tail end of a ring cooler.

[0025] Reference numerals:

[0026] 101. Smoke hood; 102. Smoke pipe; 103. Chimney; 104. induced draft fan; 105. Heat exchanger; 106. Absorption chiller; 107. Hot water storage tank; 108. Cooling tower; 109. Cold water storage tank; 110. Flue gas heat exchange hot water pump; 111. Generator heat source hot water pump; 112. Cooling water pump; 113. Chilled water pump. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0033] like Figure 1 The embodiment of the utility model shown is a flue gas refrigeration device at the rear of a ring cooler, comprising: a smoke hood 101 at the rear of the ring cooler, a smoke pipe 102 is penetrated through the smoke hood 101, one end of the smoke pipe 102 is connected to the rear of the ring cooler; a chimney 103 is provided at the other end of the smoke pipe 102, a draft fan 104 is provided in the chimney 103, and a heat exchanger 105 is provided on the top of the induced draft fan 104; one side of the heat exchanger 105 is connected to an absorption refrigerator 106 through a pipeline, and a hot water storage tank 107 is provided between the heat exchanger 105 and the absorption refrigerator 106; the absorption refrigerator 106 is connected to a cooling tower 108 and a cold water storage tank 109 through pipelines respectively.

[0034] Specifically, the flue gas refrigeration device at the tail end of the ring cooler utilizes the heat of the flue gas at the tail end of the ring cooler for cooling, thereby reducing the demand for external energy. The hot water storage tank 107 and the cold water storage tank 109 can effectively balance the temperature fluctuation, making the cooling process more stable, and realizing efficient cooling of the absorption chiller 106 to meet the actual cooling demand, and replacing the compression refrigeration that uses electricity, thereby effectively reducing energy loss. At the same time, it reduces the direct discharge of flue gas from the tail end of the ring cooler into the air, avoids pollution to the environment, and achieves the effect of energy saving and emission reduction.

[0035] like Figure 1 As shown, a flue gas heat exchange hot water pump 110 is provided between the heat exchanger 105 and the hot water storage tank 107 .

[0036] Specifically, since a flue gas heat exchange hot water pump 110 is provided between the heat exchanger 105 and the water storage tank 107, the heat transfer efficiency between the heat exchanger 105 and the water storage tank 107 can be enhanced, and the flue gas heat exchange hot water pump 110 can effectively draw cold water from the lower part of the water storage tank 107 into the heat exchanger 105 for heating, and then transport the hot water to the water storage tank 107, thereby enhancing the heat transfer efficiency, making the water heating process faster and more effective, and improving the water heating efficiency.

[0037] Furthermore, a generator heat source hot water pump 111 is provided between the hot water storage tank 107 and the absorption refrigeration machine 106 .

[0038] Specifically, since a generator heat source hot water pump 111 is provided between the hot water storage tank 107 and the absorption refrigerator 106, the hot water in the upper part of the hot water storage tank 107 is transported to the generator of the absorption refrigerator 106 through the generator heat source hot water pump 111, and the heat in the hot water is absorbed by the binary solution of the generator of the absorption refrigerator 106, and the hot water is cooled and returned to the lower part of the hot water storage tank 107, so that the hot water in the hot water storage tank 107 can be efficiently transported to the generator of the absorption refrigerator 106, ensuring the effective use of heat, and forming a cold and hot water circulation between the heat exchanger 105, the hot water storage tank 107 and the absorption refrigerator 106, which can better recover and utilize the high-temperature flue gas at the tail of the ring cooler, reduce heat loss, and improve the overall energy utilization rate of the device.

[0039] Furthermore, a cooling water pump 112 is provided between the absorption chiller 106 and the cooling tower 108 .

[0040] Specifically, since a cooling water pump 112 is provided between the absorption chiller 106 and the cooling tower 108, the cooling water pump 112 can quickly bring the hot water in the absorption chiller 106 to the cooling tower 108 for heat dissipation, thereby avoiding the accumulation of heat in the absorption chiller 106 and affecting the operation of the device, thereby improving the operating safety and stability of the device.

[0041] Further, an evaporator chilled water pump 113 is provided between the absorption chiller 106 and the chilled water storage tank 109.

[0042] Specifically, by providing an evaporator chilled water pump 113 between the absorption chiller 106 and the chilled water storage tank 109, the heat exchange efficiency between the generator in the absorption chiller 106 and the chilled water storage tank 109 can be effectively improved, ensuring that the chilled water can effectively absorb cold in the absorption chiller 106 and transfer it to the chilled water storage tank 109, enhancing the cooling capacity of the device and improving the refrigeration efficiency.

[0043] According to an embodiment of the present invention, the heat exchanger 105 is a gas-liquid heat exchanger.

[0044] Specifically, since the heat exchanger 105 is a gas-liquid heat exchanger, the gas-liquid heat exchanger exchanges heat through direct or indirect contact between gas and liquid, thereby achieving efficient heat transfer, maximizing the utilization of waste heat, reducing the demand for additional energy, thus reducing energy consumption and improving energy utilization efficiency.

[0045] In addition, it should be noted that the control logic of the device is as follows: the lower limit temperature of the hot water storage tank 107 is t1, and the lower limit temperature of the chilled water storage tank 109 is t2; when the temperature at the upper part of the hot water storage tank 107 > t1 and the temperature at the upper part of the chilled water storage tank 109 > t2, the absorption chiller 106 is started; when the temperature at the upper part of the chilled water storage tank 109 < t2, even if the temperature at the upper part of the hot water storage tank 107 > t1, the absorption chiller 106 is not started, and only the waste heat recovery cycle is run to continuously heat the water in the hot water storage tank 107, and the water temperature rises continuously from top to bottom; when the water temperature at the upper part of the hot water storage tank 21 < t1, the absorption chiller 106 is not started.

[0046] Specifically, the condition for the absorption chiller 106 is that the temperature at the upper part of the hot water storage tank 107 > t1 and the temperature at the upper part of the chilled water storage tank 109 > t2, then the start condition of the absorption refrigerant 106 is reached to meet the high-efficiency refrigeration demand; while the temperature at the upper part of the chilled water storage tank 109 < t2, even if the temperature at the upper part of the hot water storage tank 107 > t1, it is only in the waste heat recovery mode to continuously heat the water in the hot water storage tank 107, and the water temperature gradually rises from top to bottom; when the water temperature at the upper part of the hot water storage tank 107 < t1, the absorption chiller 106 is not started, and the device remains in a stopped operation state. This enables the device to automatically switch different working states according to different temperature conditions of the hot water storage tank 107 and the chilled water storage tank 109, preventing the device from having unstable refrigeration or reduced efficiency due to excessive temperature fluctuations, and improving the refrigeration flexibility and reliability of the device.

[0047] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A flue gas refrigeration device at the tail of a ring cooler, characterized in that: include: A smoke hood (101) at the rear of the ring cooler, wherein a smoke pipe (102) is provided through the smoke hood (101), and one end of the smoke pipe (102) is connected to the rear of the ring cooler; A chimney (103) is provided at the other end of the smoke pipe (102), an induced draft fan (104) is provided in the chimney (103), and a heat exchanger (105) is provided on the top of the induced draft fan (104); One side of the heat exchanger (105) is connected to an absorption refrigerator (106) through a pipeline, and a hot water storage tank (107) is provided between the heat exchanger (105) and the absorption refrigerator (106); The absorption refrigeration machine (106) is connected to a cooling tower (108) and a cold storage water tank (109) through pipelines.

2. The flue gas refrigeration device at the tail of the ring cooler according to claim 1, characterized in that: A flue gas heat exchange hot water pump (110) is provided between the heat exchanger (105) and the hot water storage tank (107).

3. The flue gas refrigeration device at the tail of the ring cooler according to claim 2, characterized in that: A generator heat source hot water pump (111) is provided between the hot water storage tank (107) and the absorption refrigeration machine (106).

4. The flue gas refrigeration device at the tail of the ring cooler according to claim 3, characterized in that: A cooling water pump (112) is provided between the absorption refrigeration machine (106) and the cooling tower (108).

5. The flue gas refrigeration device at the tail of the ring cooler according to claim 4, characterized in that: An evaporator chilled water pump (113) is provided between the absorption refrigeration machine (106) and the cold storage water tank (109).

6. The flue gas refrigeration device at the tail of the ring cooler according to claim 1, characterized in that: The heat exchanger (105) is a gas-liquid heat exchanger.

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