Mechanical shaft kiln calcination waste heat recovery device for drying calcium carbonate filter cake

Abstract

The utility model relates to the technical field of calcium carbonate production, and discloses a mechanical shaft kiln calcination waste heat recovery device for drying calcium carbonate filter cakes, which comprises a drying box, a drying assembly and a recovery assembly, the drying assembly comprises a plurality of supporting plates which are distributed in a staggered mode and fixedly connected to the inner wall of the drying box, and one side of the bottom of the drying box fixedly communicates with an exhaust pipe; the effect of improving the waste heat recycling rate is achieved, the drying temperature is conveniently increased through mutual cooperation of a hot pressing fan, the separation box, a second connecting pipe and a third connecting pipe, the drying temperature is conveniently reduced through mutual cooperation of an exhaust fan, a first connecting pipe and an exhaust pipe, and the drying efficiency is improved. Therefore, the heat conduction pipe does not need to be connected with an external temperature adjusting assembly, heat loss in the flowing process of the heat conduction oil is effectively reduced, and the problems that the energy utilization efficiency is not improved easily, and the production cost is increased are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to calcium carbonate production technical field, concretely is a kind of machine vertical kiln calcination waste heat recovery device for calcium carbonate filter cake drying. BACKGROUND

[0002] As a kind of inorganic chemical raw material, calcium carbonate is widely used in chemical industry, medicine, building materials, papermaking etc., our country is the big country of calcium carbonate consumption, also is the big country of production.Most of calcium carbonate production is by limestone calcination digestion after carbonization, dehydration, drying, screening, packaging etc.Process is completed.In the production process of calcium carbonate, the cost of calcium carbonate wet filter material drying energy consumption accounts for more than 40% of total cost, directly affects the level of product price.Currently, although the drying operation of wet material calcium carbonate in calcium carbonate production process considers the use of waste heat generated by early limestone calcination, but due to unreasonable utilization, on the one hand, it causes incomplete subsequent drying, affects product quality, and also causes great waste of heat.

[0003] Through the search, the Chinese patent with publication number CN208476007U discloses a machine vertical kiln calcination waste heat recovery device for calcium carbonate filter cake drying, relating to calcium carbonate production equipment technical field, including heat exchanger arranged on limestone machine vertical kiln, first heat transfer pipe connected with the outlet end of heat exchanger, drying device connected with first heat transfer pipe and second heat transfer pipe, and first heat transfer pipe is respectively connected with heater and cooler.

[0004] The device, the waste heat in limestone machine vertical kiln is transferred to first heat transfer pipe through heat exchanger, the heat transfer oil in the tube body of first heat transfer pipe carries heat to drying device, provides heat for calcium carbonate wet material drying, when the temperature in first heat transfer pipe does not meet the temperature required by drying device, can adjust the oil temperature of heat transfer oil through cooler or heater, ensure that the temperature and heat suitable for drying device are provided, improve the energy utilization efficiency of whole process.

[0005] But the device still has the following problems, the device adopts first heat transfer pipe and drying device internal pipeline intercommunication, heat is transferred to drying device interior through heat transfer oil in first heat transfer pipe, then the oil temperature of heat transfer oil is regulated through cooler and heater, since cooler and heater are parallelly connected with first heat transfer pipe, when heat transfer oil moves through cooler and heater, certain heat loss is generated, which is not conducive to improving energy utilization efficiency, increases production cost. Utility model content

[0006] (1) technical problem solved

[0007] The utility model provides a kind of machine vertical kiln calcination waste heat recovery device for calcium carbonate filter cake drying, solve the above-mentioned problem of not conducive to improving energy utilization efficiency, increase the production cost.

[0008] (II) Technical solutions

[0009] To achieve the above object, the utility model provides the following technical scheme: a kind of machine vertical kiln calcination waste heat recovery device for calcium carbonate filter cake drying, including drying cabinet, the bottom corner of drying cabinet is all fixedly connected with support foot, still including the drying assembly and recovery component being set to drying cabinet interior;

[0010] The drying assembly includes a plurality of fixedly connected support plates in the inner wall of the drying cabinet, a suction pipe is fixedly communicated with one side of the bottom of the drying cabinet, a connecting pipe one is fixedly communicated with one side of the top of the drying cabinet, an exhaust fan is fixedly connected with the other side of the top of the drying cabinet, and one end of the exhaust fan is fixedly communicated with one end of the connecting pipe one, a connecting pipe two is fixedly communicated with one side of the outer wall of the drying cabinet, a separation tank is arranged on one side of the outer part of the drying cabinet, and one end of the separation tank is fixedly communicated with one end of the connecting pipe two, a plurality of adsorption plates are fixedly connected to the inner wall of the separation tank, a hot blast fan is fixedly communicated with the other end of the separation tank, one end of the hot blast fan is fixedly communicated with a connecting pipe three, and one end of the connecting pipe three is fixedly communicated with the other side of the bottom of the drying cabinet.

[0011] Preferably, a temperature detector is installed on the inner wall of the drying cabinet near the support plate, and a control valve is arranged on one end of the suction pipe.

[0012] Preferably, the recovery component includes a set of heat exchange fins arranged on the other side of the outer part of the drying cabinet, and the outer walls of a set of heat exchange fins are fixedly connected with a heat exchange tank.

[0013] Preferably, a heat conduction pipe is arranged through the bottom end of the inner cavity of the drying cabinet, and the heat conduction pipe extends between the end of the outer part of the drying cabinet and the heat exchange fins, and a heat preservation sleeve is arranged on the outer peripheral wall of the heat conduction pipe near the heat exchange tank.

[0014] Preferably, a circulating pump is fixedly connected to the inner bottom of the drying cabinet, and both ends of the circulating pump are fixedly communicated with the heat conduction pipe.

[0015] Preferably, a sealing door is hingedly connected to one end of the drying cabinet and one end of the separation tank, and a handle is fixedly connected to one end of each sealing door.

[0016] (III) Beneficial effects

[0017] 1. The machine vertical kiln calcination waste heat recovery device for calcium carbonate filter cake drying, the heat conduction pipe is arranged at the bottom end of the drying box inner cavity, then through the cooperation of the hot pressure fan, the separation box, the connecting pipe two and the connecting pipe three, the drying temperature is facilitated to be raised, through the cooperation of the exhaust fan, the connecting pipe one and the exhaust pipe, the drying temperature is facilitated to be reduced, so that the heat conduction pipe does not need to be connected with the external temperature adjusting assembly, the heat loss in the heat conduction oil flow process is effectively reduced, and the utilization rate of waste heat recovery is improved.

[0018] 2. The machine vertical kiln calcination waste heat recovery device for calcium carbonate filter cake drying, which is practical and efficient, and is skillfully designed, wherein the heat conduction pipe is prevented from being exposed to the external environment through the arrangement of the heat exchange box and the heat preservation sleeve, and the heat loss in the heat conduction oil flow process is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a first perspective three-dimensional structure schematic view of the utility model;

[0020] Figure 2 It is a second perspective three-dimensional structure schematic view of the utility model;

[0021] Figure 3 It is a partial component half-section three-dimensional structure schematic view of the utility model;

[0022] Figure 4 It is a partial recovery component three-dimensional structure schematic view of the utility model.

[0023] In the drawing: 1, drying box; 2, supporting leg; 3, heat conduction pipe; 4, heat exchange fin; 5, heat exchange box; 6, fixing frame; 7, heat preservation sleeve; 8, supporting plate; 9, exhaust pipe; 10, connecting pipe one; 11, exhaust fan; 12, connecting pipe two; 13, separation box; 14, adsorption plate; 15, hot pressure fan; 16, connecting pipe three; 17, temperature detector; 18, circulating pump; 19, sealing door; 20, handle. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Embodiment: as Figure 1As shown, a machine vertical kiln calcination waste heat recovery device for calcium carbonate filter cake drying, including drying box 1, drying box 1 is made of composite metal material, with high temperature resistance, corrosion resistance, improve the overall structure of the device strength, the bottom corner of the drying box 1 is fixedly connected with support foot 2 through welding, also includes drying assembly and recovery assembly arranged in the drying box 1.

[0026] As Figure 2 With Figure 3 As shown, in an embodiment, in order to improve the drying efficiency, the drying assembly includes a plurality of staggered support plates 8 fixedly connected to the inner wall of the drying box 1, wherein the support plate 8 plays a supporting role for calcium carbonate filter cake, one side of the bottom of the drying box 1 is fixedly connected with an exhaust pipe 9, and one end of the exhaust pipe 9 is provided with a control valve, wherein the exhaust pipe 9 plays a role in absorbing external cold air, facilitating the adjustment of the internal temperature of the drying box 1, one side of the top of the drying box 1 is fixedly connected with a connecting pipe one 10, one side of the top of the drying box 1 is fixedly connected with an exhaust fan 11, and one end of the exhaust fan 11 is fixedly connected with one end of the connecting pipe one 10, through the cooperation between the exhaust fan 11, the connecting pipe one 10 and the exhaust pipe 9, cold air can be quickly sucked in, and the temperature inside the drying box 1 can be reduced to an appropriate range of drying temperature, one side of the outer wall of the drying box 1 is fixedly connected with a connecting pipe two 12, one side of the outside of the drying box 1 is provided with a separation tank 13, and one end of the separation tank 13 is fixedly connected with one end of the connecting pipe two 12, a plurality of adsorption plates 14 are fixedly connected to the inner wall of the separation tank 13, wherein the adsorption plate 14 is made of activated carbon, which can adsorb water vapor in the gas and improve the drying efficiency, the other end of the separation tank 13 is fixedly connected with a hot blast fan 15, wherein the hot blast fan 15 plays a role in secondary heating, one end of the hot blast fan 15 is fixedly connected with a connecting pipe three 16, and one end of the connecting pipe three 16 is fixedly connected with the other side of the bottom of the drying box 1, through the cooperation between the hot blast fan 15 and the connecting pipe three 16, high-temperature gas can be filled into the drying box 1, and the temperature inside the drying box 1 can be improved to an appropriate range of drying temperature, and a temperature detector 17 is installed on the inner wall of the drying box 1 close to the support plate 8, wherein the temperature detector 17 plays a role in detecting the drying temperature.

[0027] As Figure 3 With Figure 4As shown, in an embodiment, in order to improve the utilization rate of waste heat recovery, the recovery assembly includes a set of heat exchange fins 4 arranged on the other side of the drying box 1 outside, wherein the heat exchange fins 4 are arranged at the machine stand kiln heat exchanger, facilitating the transfer of waste heat from the machine stand kiln to the heat conducting pipe 3, and the outer wall of a set of heat exchange fins 4 is fixedly connected with a heat exchange box 5, wherein the heat exchange box 5 is made of heat insulation material, avoiding the escape of waste heat through the heat exchange box 5 to the external environment, and a pair of fixed frames 6 is fixedly connected to the outer wall of the heat exchange box 5, wherein the fixed frame 6 plays a role in fixing and supporting the heat exchange box 5 and the heat exchange fins 4, and the heat conducting pipe 3 is arranged through the bottom end of the inner cavity of the drying box 1, and the heat conducting pipe 3 extends between the end of the drying box 1 outside and the heat exchange fins 4, wherein the heat conducting pipe 3 is filled with heat conducting oil, which facilitates the absorption of heat from the heat exchange fins 4, and the outer peripheral wall of the heat conducting pipe 3 is sleeved with a heat preservation sleeve 7 near the heat exchange box 5, wherein the heat preservation sleeve 7 plays a role in heat preservation and insulation, reducing heat dissipation during the flow of heat conducting oil and improving the utilization rate of waste heat recovery, and the inner bottom of the drying box 1 is fixedly connected with a circulating pump 18, and the two ends of the circulating pump 18 are fixedly communicated with the heat conducting pipe 3, wherein the circulating pump 18 plays a role in driving the circulating flow of heat conducting oil in the heat conducting pipe 3.

[0028] As Figure 1 shown, in an embodiment, one end of the drying box 1 and one end of the separation tank 13 are hingedly connected with a sealing door 19, and one end of each sealing door 19 is fixedly connected with a handle 20, wherein the sealing door 19 plays a role in improving the drying efficiency, facilitating the removal of calcium carbonate filter cake and the adsorption plate 14.

[0029] Working principle: in use, first start the circulating pump 18, drive the heat conducting oil in the heat pipe 3 circulation flow through the circulating pump 18, through the cooperation between the heat exchange fin 4 and the heat pipe 3, so that the heat of the machine vertical kiln is transferred to the heat conducting oil, then to the air inside the drying box 1, improve the temperature inside the drying box 1, detect the temperature inside the drying box 1 through the temperature detector 17, when the temperature inside the drying box 1 is lower than the appropriate temperature range required for drying, start the hot blast fan 15, so that the air inside the drying box 1 bypasses a plurality of staggered distribution support plates 8, moves to the separation tank 13 through the connecting pipe two 12, then passes through a plurality of staggered distribution adsorption plates 14, adsorbs water vapor in the air flow, so as to improve the drying efficiency, then through the cooperation between the hot blast fan 15 and the connecting pipe three 16, the airflow of secondary heating moves to the inside of the drying box 1, improves the drying temperature, when the temperature inside the drying box 1 is higher than the appropriate temperature range required for drying, open the control valve of the exhaust pipe 9, then start the exhaust fan 11, through the cooperation between the exhaust fan 11 and the connecting pipe one 10 and the exhaust pipe 9, absorb the cold air outside to the inside of the drying box 1, so as to adjust the drying temperature, at the same time, through the setting of the heat preservation sleeve 7 and the heat exchange tank 5, reduce the heat loss in the movement process of the heat conducting oil, effectively improve the utilization rate of waste heat.

[0030] In the description of the present application, it should be explained that, unless otherwise specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A machine vertical kiln calcination waste heat recovery device for drying calcium carbonate filter cake, comprising a drying box (1), support feet (2) are fixedly connected at the bottom corners of the drying box (1), characterized in that: The drying assembly and the recycling assembly are arranged in the drying box (1). The drying assembly comprises a plurality of support plates (8) fixedly connected to the inner wall of the drying box (1) in a staggered manner, one side of the bottom of the drying box (1) is fixedly connected with an air exhaust pipe (9), one side of the top of the drying box (1) is fixedly connected with a connecting pipe (10), one side of the top of the drying box (1) is fixedly connected with an air exhaust fan (11), one end of the air exhaust fan (11) is fixedly connected with one end of the connecting pipe (10), one side of the outer wall of the drying box (1) is fixedly connected with a connecting pipe (12), one side of the outer wall of the drying box (1) is provided with a separation box (13), one end of the separation box (13) is fixedly connected with one end of the connecting pipe (12), the inner wall of the separation box (13) is fixedly connected with a plurality of adsorption plates (14) arranged in a staggered manner, the other end of the separation box (13) is fixedly connected with a hot blast fan (15), one end of the hot blast fan (15) is fixedly connected with a connecting pipe (16), and one end of the connecting pipe (16) is fixedly connected with the other side of the bottom of the drying box (1).

2. A calcination waste heat recovery device for carbonated lime filter cake drying of a shaft kiln according to claim 1, characterized in that: The temperature detector (17) is installed on the inner wall of the drying box (1) near the support plate (8), and one end of the air exhaust pipe (9) is provided with a control valve.

3. A calcination waste heat recovery device for drying calcium carbonate filter cake in a shaft kiln according to claim 1, characterized in that: The recycling assembly comprises a plurality of heat exchange fins (4) arranged on the other side of the outer wall of the drying box (1), and the outer wall of the heat exchange fins (4) is fixedly connected with a heat exchange box (5).

4. A calcination waste heat recovery device for carbonated lime filter cake drying of a shaft kiln according to claim 3, characterized in that: The heat conduction pipe (3) is arranged through the bottom of the inner cavity of the drying box (1), and one end of the heat conduction pipe (3) extending to the outside of the drying box (1) is arranged through the heat exchange fin (4), and the outer peripheral wall of the heat conduction pipe (3) is sleeved with a heat preservation sleeve (7) near the heat exchange box (5).

5. A calcination waste heat recovery device for carbonated lime filter cake drying of a shaft kiln according to claim 4, characterized in that: The circulating pump (18) is fixedly connected to the inner bottom of the drying box (1), and the two ends of the circulating pump (18) are fixedly connected with the heat conduction pipe (3).

6. A calcination waste heat recovery device for carbonated lime filter cake drying of a shaft kiln according to claim 5, characterized in that: One end of the drying box (1) and one end of the separation box (13) are hingedly connected with a sealing door (19), and one end of each sealing door (19) is fixedly connected with a handle (20).

Images