Waste heat recycling device for calcium-magnesium blast furnace

Abstract

The utility model discloses a calcium magnesium blast furnace waste heat recycling device, which belongs to the technical field of waste heat recycling and comprises a heat exchange cylinder, a heat exchange cavity is arranged inside the heat exchange cylinder, a flue gas heat exchanger is fixedly connected inside the heat exchange cavity, one end of the heat exchange cylinder is fixedly connected with a flue gas inlet hopper, and the other end of the heat exchange cylinder is fixedly connected with a flue gas outlet hopper. One end of the smoke inlet hopper is fixedly connected with a smoke conveying pipe; according to the utility model, the high-temperature-resistant filter screen, the scraping ring and the spring are arranged, so that in order to ensure that the high-temperature-resistant filter screen has continuous and efficient filtering performance on smoke, a worker can quickly and conveniently clean the surfaces of the two sides of the high-temperature-resistant filter screen only through simple drawing operation, and the high-temperature-resistant filter screen can be always kept in a good filtering state; the efficient filtering capacity of the waste heat recycling device on impurities in the smoke is effectively guaranteed, so that it can be guaranteed that the impurities in the smoke cannot be attached to the smoke heat exchanger as much as possible, and the heat exchange efficiency of the waste heat recycling device is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat recovery and utilization technology, specifically relating to a waste heat recovery and utilization device for calcium-magnesium blast furnaces. Background Technology

[0002] Waste heat recovery and utilization refers to a technology that recovers and reuses excess heat generated during industrial production or energy conversion. This heat is usually released into the environment without being utilized, causing energy waste and environmental pollution. By recovering and utilizing waste heat, energy efficiency can be improved, energy waste can be reduced, business operating costs can be lowered, and a positive impact on environmental protection can be achieved.

[0003] During the production process of calcium-magnesium blast furnace, the reaction inside the furnace generates a large amount of flue gas. If this flue gas enters the waste heat recovery and utilization device of calcium-magnesium blast furnace directly without pretreatment and comes into contact with the flue gas heat exchanger in the device for heat exchange, a large amount of impurities carried in it will adhere to the surface of the heat exchanger, thereby affecting the heat exchange efficiency between the flue gas and the heat exchanger, resulting in a significant decrease in the heat exchange efficiency of the entire waste heat recovery and utilization device. Therefore, a waste heat recovery and utilization device for calcium-magnesium blast furnace is needed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a waste heat recovery and utilization device for calcium-magnesium blast furnaces to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery and utilization device for calcium-magnesium blast furnaces, comprising a heat exchange cylinder, an internal heat exchange chamber, a flue gas heat exchanger fixedly connected inside the heat exchange chamber, a flue gas inlet hopper fixedly connected to one end of the heat exchange cylinder, a flue gas conveying pipe fixedly connected to one end of the flue gas inlet hopper, a flue gas outlet hopper fixedly connected to the other end of the heat exchange cylinder, a flue gas outlet pipe fixedly connected to one end of the flue gas outlet hopper, a flue gas purification tower fixedly connected to one end of the flue gas purification tower, an exhaust pipe fixedly connected to the top of the flue gas purification tower, a limiting slot formed inside the flue gas inlet hopper, a sealing ring inserted into the inner wall of the limiting slot, a high-temperature resistant filter fixedly connected inside the sealing ring, a connecting pull ring fixedly connected to the surface of the sealing ring, two limiting rings fixedly connected to the surface of the flue gas inlet hopper, five springs fixedly connected to one side of each of the two limiting rings, a connecting ring fixedly connected to the other end of each of the five springs, and a scraper ring fixedly connected to one side of each of the two connecting rings.

[0006] By setting the above structure, in order to ensure that the high-temperature-resistant filter screen has a sustained and efficient filtering performance on the flue gas, the staff only needs to perform a simple pulling operation, so that the high-temperature-resistant filter screen can be quickly and conveniently cleaned on both sides of the surface, so that the high-temperature-resistant filter screen can always maintain a good filtering state, effectively guaranteeing its efficient filtering capacity for impurities in the flue gas, so as to ensure that the impurities in the flue gas do not adhere to the flue gas heat exchanger as much as possible, thereby guaranteeing the heat exchange efficiency of the waste heat recovery and utilization device. In the process of cleaning the high-temperature-resistant filter screen, the spring plays a key role. The elastic force provided by the spring can ensure that the two scraping rings are always tightly attached to the surface of the high-temperature-resistant filter screen, thereby guaranteeing the cleaning effect of the filter screen, thereby providing a strong guarantee for the efficient filtration of flue gas. In addition, after the high-temperature-resistant filter screen is quickly pulled out to the outside, the staff can conveniently replace it, thereby improving the convenience of maintaining the high-temperature-resistant filter screen.

[0007] As a preferred scheme, the two ends of the flue gas heat exchanger respectively penetrate the heat exchange cylinder.

[0008] As a preferred scheme, the high-temperature-resistant filter screen is located inside the flue gas inlet hopper.

[0009] As a preferred scheme, the two connecting rings are respectively sleeved on the surface of the flue gas inlet hopper.

[0010] As a preferred scheme, the two connecting rings respectively slide on the surface of the flue gas inlet hopper.

[0011] As a preferred scheme, the two scraping rings are respectively attached to the surface of the connecting pull ring.

[0012] By setting the limiting slot and the sealing ring, the sealing ring is precisely fitted in the inner wall of the limiting slot, and the accurate installation of the high-temperature-resistant filter screen is realized through mechanical positioning, so as to ensure the positional accuracy of the high-temperature-resistant filter screen in the flue gas inlet hopper. At the same time, the sealing ring forms an efficient sealing barrier to isolate the flue gas inlet hopper from the external environment, effectively preventing high-temperature flue gas leakage, thereby providing reliable protection for the sealing and stability of the calcium-magnesium blast furnace waste heat recovery and utilization device, and ensuring efficient and stable operation of the flue gas during heat exchange.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] The utility model discloses, through setting up high temperature -resistant filter screen, scrape ring and spring, for ensuring that high temperature -resistant filter screen has the sustained high -efficient filtration performance to flue gas, and staff only needs through simple pull operation, can fast, convenient realization to high temperature -resistant filter screen both sides surface cleaning, makes high temperature -resistant filter screen can always maintain good filtration state, effectively guarantees its high -efficient filtration ability to the sundries in flue gas, thereby can guarantee the sundries in flue gas as far as possible not to be attached in flue gas heat exchanger, guarantees the heat exchange efficiency of waste heat recovery and utilization device, in the process of cleaning high temperature -resistant filter screen, spring plays the key role, and the elastic force that it provides can ensure that two scrape rings always closely adhere to high temperature -resistant filter screen surface, guarantees the cleaning effect to filter screen, thereby provides strong guarantee for the efficient filtration of flue gas, in addition, when high temperature -resistant filter screen is pulled to outside fast, the convenience of maintenance to high temperature -resistant filter screen can be improved.

[0015] The utility model discloses, through setting up limit slot and sealing ring, sealing ring precisionly fits in the inner wall of limit slot, realizes the accurate installation of high temperature -resistant filter screen through mechanical positioning, ensures its position accuracy in flue gas entry hopper, simultaneously, sealing ring forms high -efficient sealing barrier, and the environment of flue gas entry hopper with outside is isolated, effectively prevents high temperature flue gas leakage, provides reliable guarantee for the sealing and stability of calcium -magnesium blast furnace waste heat recovery and utilization device, ensures that flue gas maintains efficient stable operation in the heat exchange process. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic diagram of three -dimensional for the utility model;

[0017] Figure 2 It is the structure schematic diagram of internal section of heat exchange cylinder for the utility model;

[0018] Figure 3 It is the structure schematic diagram of high temperature -resistant filter screen for the utility model;

[0019] Figure 4 It is the structure schematic diagram of the utility model Figure 3 It is the structure schematic diagram of the utility model of A place amplification in middle.

[0020] In the drawing: 1, heat exchange cylinder;2, heat exchange cavity;3, flue gas heat exchanger;4, flue gas entry hopper;5, smoke pipe;6, flue gas exit hopper;7, smoke pipe;8, flue gas purification tower;9, smoke exhaust pipe;10, limit slot;11, sealing ring;12, high temperature -resistant filter screen;13, connecting pull ring;14, limit ring;15, spring;16, connecting ring;17, scrape ring. DETAILED DESCRIPTION

[0021] The utility model will be further described in connection with examples below.

[0022] The following examples are used to illustrate the present application, but cannot be used to limit the protection scope of the present application. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements of the method of the present application under the concept of the present application all belong to the protection scope of the present application.

[0023] Please refer to Figures 1-4 The utility model provides a calcium magnesium blast furnace waste heat recycling device, including heat exchange cylinder 1, the inside of heat exchange cylinder 1 is seted up heat exchange cavity 2, the inside fixedly connected with flue gas heat exchanger 3 of heat exchange cavity 2, one end of heat exchange cylinder 1 is fixedly connected with flue gas into hopper 4, one end of flue gas into hopper 4 is fixedly connected with smoke pipe 5, the other end of heat exchange cylinder 1 is fixedly connected with flue gas out of hopper 6, one end of flue gas out of hopper 6 is fixedly connected with smoke pipe 7, one end of smoke pipe 7 is fixedly connected with flue gas purification tower 8, the top of flue gas purification tower 8 is fixedly connected with smoke exhaust pipe 9, the inside of flue gas into hopper 4 is seted up with limit slot 10, the inner wall of limit slot 10 is inserted and is connected with sealing ring 11, the inside fixedly connected with high temperature resistant filter screen 12 of sealing ring 11, the surface fixedly connected with connecting pull ring 13 of sealing ring 11, the surface fixedly connected with two limit rings 14 of flue gas into hopper 4, the surface of two limit rings 14 one side is fixedly connected with five springs 15 respectively, the other end of five springs 15 is fixedly connected with connecting ring 16, the surface fixedly connected with scraping ring 17 of two connecting rings 16 one side, through setting high temperature resistant filter screen 12, scraping ring 17 and spring 15, to ensure that high temperature resistant filter screen 12 has the sustained high efficiency filtration performance to flue gas, staff only needs to operate through simple pulling, can realize the cleaning of the both sides surface of high temperature resistant filter screen 12 quickly and conveniently, makes high temperature resistant filter screen 12 can always maintain good filtration state, effectively guarantees its high efficient filtration capacity to the sundries in flue gas, thereby can guarantee the sundries in flue gas as far as possible not to adhere in flue gas heat exchanger 3, guarantees the heat exchange efficiency of waste heat recycling device, in the process of cleaning high temperature resistant filter screen 12, spring 15 plays the key role, the elastic force that it provides can ensure that two scraping rings 17 always closely adhere to the surface of high temperature resistant filter screen 12, guarantee the cleaning effect of filter screen, thereby provide strong guarantee for the high efficient filtration of flue gas, in addition, when high temperature resistant filter screen 12 is pulled to the outside quickly, it is convenient for staff to replace it, can improve the convenience of maintaining high temperature resistant filter screen 12.

[0024] The both ends of flue gas heat exchanger 3 are respectively penetrated through heat exchange cylinder 1.

[0025] High temperature resistant filter screen 12 is located in the inside of flue gas into hopper 4.

[0026] Two connecting rings 16 are respectively sleeved on the surface of flue gas into hopper 4.

[0027] Two connecting rings 16 respectively slide on the surface of flue gas into hopper 4.

[0028] Two scraping rings 17 are respectively attached to the surface of the connecting pull ring 13, and through the setting of the limiting slot 10 and the sealing ring 11, the sealing ring 11 is accurately embedded in the inner wall of the limiting slot 10, and the accurate installation of the high-temperature-resistant filter screen 12 is realized through mechanical positioning, so that the position accuracy of the high-temperature-resistant filter screen 12 in the smoke inlet hopper 4 is ensured, and meanwhile, the sealing ring 11 forms a high-efficiency sealing barrier to isolate the smoke inlet hopper 4 from the external environment, effectively prevents the leakage of high-temperature smoke, provides reliable guarantee for the sealing and stability of the calcium-magnesium blast furnace waste heat recovery device, and ensures that the smoke maintains efficient and stable operation in the heat exchange process.

[0029] The working principle and use process of the utility model are as follows:

[0030] When the smoke conveying pipe 5 connected with the calcium-magnesium blast furnace conveys the high-temperature smoke generated by the blast furnace reaction to the smoke inlet hopper 4, the smoke first contacts the high-temperature-resistant filter screen 12 inside the smoke inlet hopper 4, the high-temperature-resistant filter screen 12 effectively intercepts various sundries carried in the smoke, so that the sundries are attached to the high-temperature-resistant filter screen 12, and the smoke entering the subsequent process is filtered, and the clean smoke filtered through the high-temperature-resistant filter screen 12 smoothly enters the heat exchange cavity 2 and exchanges heat with the liquid in the smoke heat exchanger 3;

[0031] When the high-temperature-resistant filter screen 12 is in a working state for a long time, a large amount of sundries will be gradually attached to the surface of the high-temperature-resistant filter screen 12, and as the sundries continuously accumulate, the filtering effect of the filter screen on the smoke will gradually decrease, when the above-mentioned situation occurs, the staff can pull the connecting pull ring 13 to drive the sealing ring 11 to be synchronously pulled out from the inside of the smoke inlet hopper 4 together with the high-temperature-resistant filter screen 12, and in the pulling-out process, the two scraping rings 17 simultaneously clean the sundries attached to the surfaces of the high-temperature-resistant filter screen 12 on both sides, so that the high-temperature-resistant filter screen 12 maintains a good cleaning state, and the efficient filtering performance of the high-temperature-resistant filter screen 12 on the sundries in the smoke is ensured;

[0032] In the smoke heat exchanger 3, the liquid completing heat exchange is output from one end thereof and is used for other production links or energy utilization processes; meanwhile, new liquid is continuously input from the other end, so that uninterrupted heat exchange with the smoke entering subsequently is maintained, and the continuity and efficiency of heat recovery are ensured;

[0033] After heat exchange, the low-temperature smoke enters the smoke outlet hopper 6 and is conveyed to the smoke purification tower 8 through the smoke outlet pipe 7 connected therewith for deep purification treatment, in the smoke purification tower 8, through a series of physical and chemical purification processes, the harmful components in the smoke are removed, so that the purified smoke reaches the environmental protection emission standard, and finally is discharged to the atmosphere through the smoke discharge pipe 9, through the waste heat recovery and purification treatment of the blast furnace smoke, not only the efficient utilization of energy is realized, but also the environmental protection of smoke emission is ensured, and the energy consumption and environmental pollution in the production process of the calcium-magnesium blast furnace are effectively reduced.

[0034] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A calcium-magnesium blast furnace waste heat recovery and utilization device, comprising a heat exchange cylinder (1), characterized in that: The inside of the heat exchange cylinder (1) is provided with a heat exchange cavity (2), the inside of the heat exchange cavity (2) is fixedly connected with a flue gas heat exchanger (3), one end of the heat exchange cylinder (1) is fixedly connected with a flue gas inlet hopper (4), one end of the flue gas inlet hopper (4) is fixedly connected with a flue gas conveying pipe (5), the other end of the heat exchange cylinder (1) is fixedly connected with a flue gas outlet hopper (6), one end of the flue gas outlet hopper (6) is fixedly connected with a flue gas outlet pipe (7), one end of the flue gas outlet pipe (7) is fixedly connected with a flue gas purification tower (8), the top of the flue gas purification tower (8) is fixedly connected with a flue gas exhaust pipe (9), the inside of the flue gas inlet hopper (4) is provided with a limiting slot (10), the inner wall of the limiting slot (10) is insertedly connected with a sealing ring (11), the inside of the sealing ring (11) is fixedly connected with a high-temperature-resistant filter screen (12), the surface of the sealing ring (11) is fixedly connected with a connecting pull ring (13), the surface of the flue gas inlet hopper (4) is fixedly connected with two limiting rings (14), one side surface of the two limiting rings (14) is respectively fixedly connected with five springs (15), the other end of the five springs (15) is fixedly connected with a connecting ring (16), one side surface of the two connecting rings (16) is fixedly connected with a scraping ring (17).

2. The calcium-magnesium blast furnace waste heat recycling device according to claim 1, characterized in that: Both ends of the flue gas heat exchanger (3) respectively penetrate the heat exchange cylinder (1).

3. The calcium-magnesium blast furnace waste heat recycling device according to claim 1, characterized in that: The high-temperature-resistant filter screen (12) is located in the inside of the flue gas inlet hopper (4).

4. The calcium-magnesium blast furnace waste heat recycling device according to claim 1, characterized in that: The two connecting rings (16) are respectively sleeved on the surface of the flue gas inlet hopper (4).

5. The calcium-magnesium blast furnace waste heat recycling device according to claim 4, characterized in that: The two connecting rings (16) respectively slide on the surface of the flue gas inlet hopper (4).

6. The calcium-magnesium blast furnace waste heat recycling device according to claim 1, characterized in that: The two scraping rings (17) respectively abut the surface of the connecting pull ring (13).

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