A three-dimensional dynamic return flow preheating drying calcination system

Abstract

The application discloses a kind of three-dimensional dynamic turn-back flow preheating drying calcination system, the side of first elevator is provided with first preheater, the side of second elevator is provided with second preheater, the side of third elevator is provided with first calciner, the side of fourth elevator is provided with second calciner, the side of fifth elevator is provided with first cooler, the side of sixth elevator is provided with second cooler, the feed inlet of first elevator is connected with bin by auger, the middle body of first calciner is provided with first high-temperature heating source, the rear end of first calciner is provided with second tail gas hot air outlet, the middle body of second calciner is provided with second high-temperature heating source, the rear end of second calciner is provided with third tail gas hot air outlet. Three-dimensional inclined plate turn-back flow process is adopted, which can ensure the preheating drying and calcination time of materials, and there is no power in the turn-back flow process. The natural flow process can ensure uniform calcination of materials, save production cost, and realize automatic production.

Description

Technical Field

[0001] The present application relates to a three-dimensional dynamic return flow preheating drying and calcining system, specifically to the field of drying and calcining. Background Art

[0002] In the current field of powder material combustion, the basic heating devices are internal heating or external heating. Therefore, the product is easily contaminated during the heating process, the material loss is large, the energy consumption is high and the cost is high. Therefore, it is necessary to study a calcination system with low material loss and low cost. Summary of the Invention

[0003] The purpose of the present invention is to provide a three-dimensional dynamic return flow preheating, drying and calcining system to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a three-dimensional dynamic return flow preheating drying and calcining system comprises a first elevator, a second elevator, a third elevator, a fourth elevator, a fifth elevator, a sixth elevator, a first preheater, a second preheater, a first calciner, a second calciner, a first cooler, a second cooler, an auger, a silo, a first tail gas hot air outlet, a second tail gas hot air outlet, a third tail gas hot air outlet, a tail gas discharge port, a first tail gas hot air inlet, a second tail gas hot air inlet, a first high-temperature heating source, a second high-temperature heating source, the first elevator, the second elevator, the third elevator, the fourth elevator, the fifth elevator, and the sixth elevator are arranged in sequence, the first preheater is provided on the side of the first elevator, the second preheater is provided on the side of the second elevator The second preheater and the third elevator are provided with a first calciner on the side, the fourth elevator is provided with a second calciner on the side, the fifth elevator is provided with a first cooler on the side, and the sixth elevator is provided with a second cooler on the side. The feed port of the first elevator is connected to the hopper through an auger, and the body of the first preheater is provided with a second exhaust hot air inlet, the rear end of the first preheater is provided with an exhaust gas discharge port, the middle body of the second preheater is provided with a first exhaust hot air inlet, the rear end of the second preheater is provided with a first exhaust hot air outlet, the middle body of the first calciner is provided with a first high-temperature heating source, the rear end of the first calciner is provided with a second exhaust hot air outlet, the middle body of the second calciner is provided with a second high-temperature heating source, and the rear end of the second calciner is provided with a third exhaust hot air outlet.

[0005] Preferably, the upper side wall of the second cooler, the lower side wall of the first cooler, the lower side wall of the sixth elevator, the lower side wall of the fourth elevator and the lower side wall of the fifth elevator are all provided with an air preheating layer, and the upper side wall of the first calciner, the upper side wall of the second preheater and the upper side wall of the second calciner are all provided with an insulation layer.

[0006] Compared with the existing technology, the beneficial effects of the present invention are: the preheating, drying and calcining of wet powder and dry powder materials are completed in one step, and the three-dimensional inclined plate return flow process is adopted to ensure the time for preheating, drying and calcining of the materials. At the same time, there is no power during the return flow process, and the natural flow process can ensure that the materials are calcined evenly. The equipment is completely sealed and free of pollution and dust, saving production costs and realizing automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of the present invention.

[0008] Figure numerals: first elevator a1, second elevator a2, third elevator a3, fourth elevator a4, fifth elevator a5, sixth elevator a6, first preheater b1, second preheater b2, first calciner c1, second calciner c2, first cooler d1, second cooler d2, auger e, silo f, first exhaust hot air outlet h1, second exhaust hot air outlet h2, third exhaust hot air outlet h3, exhaust gas discharge port i, first exhaust hot air inlet j1, second exhaust hot air inlet j2, first high-temperature heating source k1, second high-temperature heating source k2, air preheating layer 2, insulation layer 1. DETAILED DESCRIPTION

[0009] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0010] See also Figure 1The present invention provides a technical solution: a three-dimensional dynamic return flow preheating, drying and calcining system comprises a first elevator a1, a second elevator a2, a third elevator a3, a fourth elevator a4, a fifth elevator a5, a sixth elevator a6, a first preheater b1, a second preheater b2, a first calciner c1, a second calciner c2, a first cooler d1, a second cooler d2, an auger e, a silo f, a first tail gas hot air outlet h1, a second tail gas hot air outlet h2, a third tail gas hot air outlet h3, a tail gas discharge port i, a first tail gas hot air inlet j1, a second tail gas hot air inlet j2, a first high-temperature heating source k1, and a second high-temperature heating source k2. The first elevator a1, the second elevator a2, the third elevator a3, the fourth elevator a4, the fifth elevator a5, and the sixth elevator a6 are arranged in sequence. The first preheater b1 is provided on the side of the first elevator a1, and the second preheater b1 is provided on the side of the second elevator a2. The second preheater b2 and the third elevator a3 are provided with a first calciner c1 on their sides, the fourth elevator a4 is provided with a second calciner c2 on their sides, the fifth elevator a5 is provided with a first cooler d1 on their sides, and the sixth elevator a6 is provided with a second cooler d2 on their sides. The feed port of the first elevator a1 is connected to the silo f through an auger e, and the first preheater b1 is provided with a second exhaust hot air inlet j2. The rear end of the first preheater b1 is provided with an exhaust gas discharge port. Port i, a first exhaust hot air inlet j1 is provided on the middle body of the second preheater b2, a first exhaust hot air outlet h1 is provided at the rear end of the second preheater b2, a first high-temperature heating source k1 is provided on the middle body of the first calciner c1, a second exhaust hot air outlet h2 is provided at the rear end of the first calciner c1, a second high-temperature heating source k2 is provided on the middle body of the second calciner c2, and a third exhaust hot air outlet h3 is provided at the rear end of the second calciner c2.

[0011] Preferably, the upper side wall of the second cooler d2, the lower side wall of the first cooler d1, the lower side wall of the sixth elevator a6, the fourth elevator a4 and the lower side wall of the fifth elevator a5 are all provided with an air preheating layer 2, and the upper side wall of the first calciner c1, the upper side wall of the second preheater b2 and the upper side wall of the second calciner c2 are all provided with an insulation layer 1.

[0012] The working principle of a three-dimensional dynamic return flow preheating, drying and calcining system is as follows: materials are transported to the entrance of the first elevator a1 through the hopper f and the dragon e, the first elevator a1 drops the materials into the first preheater b1 for preheating, the preheated materials fall into the second elevator a2, the second elevator a2 drops the materials into the second preheater b2 for preheating, the preheated materials fall into the third elevator a3, the third elevator a3 drops the materials into the first calciner c1, the materials burned in the first calciner c1 fall into the fourth elevator a4, the fourth elevator a4 drops the materials into the second calciner c2, the calcined materials fall into the fifth elevator a5, the fifth elevator a5 drops the materials into the first cooler d1, the cooled materials fall into the outlet of the sixth elevator a6, the sixth elevator a6 drops the materials into the second cooler d2 for cooling, and the cooled materials are directly finished products and can be directly packaged; The principle of the medium heating method is: first, the second high-temperature heating source k2 is heated at high temperature, and natural gas or other methods are used for heating, and the inside of the second calciner c2 is heated at the same time to ensure that the heating temperature generates waste heat, which is discharged through the third tail gas hot air outlet h3. The discharged waste heat is transported to the first calciner c1 through a pipeline connection. At the same time, in order to ensure the internal temperature of the first calciner c1, the first high-temperature heating source k1 can be used to supplement it. The waste heat generated by the first calciner c1 is transported to the second preheater b2 through the second tail gas hot air outlet h2, and the waste heat generated by the second preheater b2 is transported to the first preheater b1 through the first tail gas hot air outlet h1. The waste heat generated by the first preheater b1 is connected to the dust collector through the tail gas discharge port i; the hot air generated by the 5-layer air preheating layer 2 is transported to the first high-temperature heating source k1 and the second high-temperature heating source k2 to help fuel combustion, increase the calorific value of the fuel, and reduce fuel costs.

[0013] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that numerous changes, modifications, inventions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three-dimensional dynamic return flow preheating, drying and calcining system, characterized by: The calcining system comprises a first elevator (a1), a second elevator (a2), a third elevator (a3), a fourth elevator (a4), a fifth elevator (a5), a sixth elevator (a6), a first preheater (b1), a second preheater (b2), a first calciner (c1), a second calciner (c2), a first cooler (d1), a second cooler (d2), an auger (e), a silo (f), a first tail gas hot air outlet (h1), a second tail gas hot air outlet (h2), a third tail gas hot air outlet (h3), a tail gas discharge port (i), a first tail gas hot air inlet (j1), a second tail gas hot air inlet (j2), a first high temperature heating device (f), a first exhaust gas hot air outlet (h1), a second exhaust gas hot air outlet (h2), a third exhaust gas hot air outlet (h3), an exhaust gas discharge port (i), a first exhaust gas hot air inlet (j1), a second exhaust ... first exhaust gas hot air outlet (h3), a first exhaust gas hot air outlet (h1), a second exhaust gas hot air outlet (h2), a first high temperature heating device (f), a first exhaust gas hot air outlet (h1), a second exhaust gas hot air outlet (h2), a first high temperature heating device (f), a first exhaust gas hot air outlet (h1), a second exhaust gas hot air outlet (h2), a first high temperature heating device (f), a first exhaust gas hot air outlet (h1), a second exhaust gas hot air outlet (h2), a third exhaust gas hot air outlet (h3), a first exhaust gas hot air outlet (h1), a second The heat source (k1), the second high temperature heating source (k2), the first hoist (a1), the second hoist (a2), the third hoist (a3), the fourth hoist (a4), the fifth hoist (a5), and the sixth hoist (a6) are arranged in sequence. The first hoist (a1) is provided with a first preheater (b1), the second hoist (a2) is provided with a second preheater (b2), the third hoist (a3) ​​is provided with a first calciner (c1), the fourth hoist (a4) is provided with a second calciner (c2), the fifth hoist (a5) is provided with a first cooler (d1), and the sixth hoist (a6) is provided with a second The first preheater (b1) is provided with a second tail gas hot air inlet (j2), the rear end of the first preheater (b1) is provided with a tail gas discharge port (i), and the dust collector is connected to the dust collector through the tail gas discharge port (i). The middle body of the second preheater (b2) is provided with a first tail gas hot air inlet (j1), the rear end of the second preheater (b2) is provided with a first tail gas hot air outlet (h1), the middle body of the first calciner (c1) is provided with a first high-temperature heating source (k1), and the rear end of the first calciner (c1) is provided with a second tail gas hot air outlet. (h2), a second high-temperature heating source (k2) is provided on the middle body of the second calciner (c2), the second high-temperature heating source (k2) is heated by natural gas, a third tail gas hot air outlet (h3) is provided at the rear end of the second calciner (c2), the upper side wall of the second cooler (d2), the lower side wall of the first cooler (d1), the lower side wall of the sixth hoist (a6), the fourth hoist (a4) and the lower side wall of the fifth hoist (a5) are all provided with a layer of air preheating layer (2), and the upper side wall of the first calciner (c1), the upper side wall of the second preheater (b2) and the upper side wall of the second calciner (c2) are all provided with a layer of insulation layer (1).

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