Flue gas cooling device for calcining furnace

Abstract

The utility model discloses a calcining furnace flue gas cooling device, which relates to the technical field of calcining furnace cooling and comprises an exhaust furnace body, a spraying device is arranged on the inner wall of the exhaust furnace body and connected with a water supply valve, an electric control valve is arranged on the water supply valve, a water collecting tray is arranged at the bottom of the exhaust furnace body, and a water outlet is arranged on the water collecting tray. A filtering device is connected between the water outlet and the circulating pump, the circulating pump is connected with a plate heat exchanger, the plate heat exchanger is connected with a spraying device, a temperature sensor and a flow sensor are arranged on a flue on the outer wall of the exhaust furnace body, and the electric adjusting valve, the temperature sensor and the flow sensor are all connected with a controller. According to the flue gas cooling device of the calcining furnace, the water collecting disc, the filtering device, the circulating pump and the like are arranged, so that cyclic utilization of water resources is achieved, and the electric adjusting valve, the temperature sensor and the flow sensor are all connected with the controller, so that accurate control over the flue gas cooling process is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to calcining furnace cooling technical field, concretely relates to a calcining furnace flue gas cooling device. BACKGROUND

[0002] In modern industrial production, calcining furnace as a kind of key thermal equipment is widely used in many fields, such as the calcination of petroleum coke and other raw materials in carbon industry. However, calcining furnace will produce a large amount of high-temperature flue gas in the running process, and the temperature of these flue gas is usually as high as 950 DEG C or above, in order to meet the subsequent process requirements and environmental protection standards, flue gas needs to be cooled.

[0003] The existing flue gas cooling method has many deficiencies, the traditional spray cooling mode, the number of spray head is insufficient, and the spraying direction is single, which leads to limited spray coverage, poor cooling effect, and this simple spray mode does not reasonably recycle and process spray water, causing a large amount of water resource waste, at the same time, real-time monitoring and accurate control of flue gas temperature and flow are lacked, which is difficult to adapt to the flue gas cooling demand under different working conditions, in view of the above reasons, there is an urgent practical need to develop a calcining furnace flue gas cooling device which is high-efficiency, energy-saving, can realize accurate control and can realize water resource recycling. SUMMARY

[0004] The utility model aims at providing a calcining furnace flue gas cooling device, solve the problem in prior art, effectively reduce the flue gas temperature while realizing the recycling of water resources, and realize the accurate control of flue gas cooling process.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a calcining furnace flue gas cooling device, including the exhaust furnace body, be provided with the spraying device on the inner wall of exhaust furnace body, the lower end of spraying device is connected with water supply valve through screw thread, be provided with electric regulating valve on water supply valve, the bottom of exhaust furnace body is provided with water collecting tray, the bottom edge of water collecting tray is provided with drain, the drain is connected with filter device through pipeline between, the one end of circulating pump away from drain is connected with plate heat exchanger, plate heat exchanger is connected with spraying device, the outer wall of exhaust furnace body is provided with controller, the outer wall of exhaust furnace body is connected with flue, be provided with temperature sensor and flow sensor on flue, electric regulating valve, temperature sensor and flow sensor are connected with controller.

[0006] Preferably, the spraying device is provided with a plurality of atomizing nozzles, the atomizing nozzles are evenly distributed on the inner wall of the exhaust furnace body, and the angle between the spraying direction of the atomizing nozzles and the flue gas flow direction is set to 25-55 degrees.

[0007] Preferably, the filtering device adopts a multi-stage filtering structure, comprising a stainless steel filter screen, an activated carbon filter layer and a ceramic membrane filter arranged in sequence along the water flow direction, the mesh number of the stainless steel filter screen is set to 80-120 meshes, the thickness of the activated carbon filter layer is set to 10-25 cm, and the pore size of the ceramic membrane filter is set to 0.1-1 um.

[0008] Preferably, the water collecting disc is provided in a shallow disc structure with a diameter larger than the inner diameter of the bottom of the exhaust furnace body, and the bottom of the water collecting disc is an inclined surface inclined to the drain port at the edge.

[0009] Preferably, the controller is further connected with a wireless communication module for remote monitoring and data transmission.

[0010] Therefore, the calcination furnace flue gas cooling device with the above structure has the following beneficial effects:

[0011] (1) The atomizing nozzles of the spraying device are uniformly distributed along the circumferential direction of the inner wall of the exhaust furnace body, and the included angle between the spraying direction of the atomizing nozzles and the flue gas flow direction is set to 22-55 degrees, so that the water mist can fully contact with the flue gas, the contact area is increased, the heat exchange efficiency is improved, and the flue gas temperature is effectively reduced;

[0012] (2) The temperature and flow information of the flue gas are monitored in real time by the temperature sensor and the flow sensor arranged on the flue, and the data is transmitted to the controller, the controller accurately controls the opening of the electric regulating valve according to the data, so as to adjust the water spraying amount of the spraying device, realize accurate control of the flue gas cooling process, and ensure stable cooling effect and energy saving;

[0013] (3) The water after spraying and cooling is collected by the water collecting disc, and the multi-stage filtering structure of the filtering device effectively removes impurities and pollutants in the water, so that the water is purified, the purified water is transported to the plate heat exchanger for cooling and then returns to the spraying device by the circulating pump, the equipment failure caused by water quality problem is reduced, the stable and efficient operation of the entire flue gas cooling device is ensured, the recycling of water resources is realized, the water resources are saved, and the operation cost is reduced.

[0014] The technical scheme of the utility model will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Fig. 1 is a structural schematic view of the calcination furnace flue gas cooling device of the utility model;

[0016] Figure 2 Fig. 3 is an internal structure schematic view of the filtering device of the utility model.

[0017] The reference signs in the drawings are as follows: 1, spraying device; 2, water supply valve; 3, electric regulating valve; 4, plate heat exchanger; 5, exhaust furnace body; 6, circulating pump; 7, filtering device; 8, water outlet; 9, controller; 10, flue; 11, temperature sensor; 12, flow sensor; 13, water collecting tray; 71, stainless steel filter screen; 72, activated carbon filter layer; 73, ceramic membrane filter. DETAILED DESCRIPTION

[0018] The technical scheme of the present application is further described below with reference to the drawings and examples. Unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the usual meaning by those skilled in the art to which the present application belongs. The features mentioned above or the features mentioned in the specific examples can be combined arbitrarily, and these specific examples are only used to illustrate the present application and not to limit the scope of the present application.

[0019] EMBODIMENT

[0020] As shown in Figure 1 , Figure 2 , the present application provides a calcining furnace flue gas cooling device, which comprises an exhaust furnace body 5, a spraying device 1 is arranged on the inner wall of the exhaust furnace body 5, the lower end of the spraying device 1 is connected with a water supply valve 2 through threads, the water supply valve 2 is provided with an electric regulating valve 3, the bottom of the exhaust furnace body 5 is provided with a water collecting tray 13, the bottom edge of the water collecting tray 13 is provided with a water outlet 8, the water outlet 8 and a circulating pump 6 are connected with a filtering device 7 through a pipeline, the end of the circulating pump 6 away from the water outlet 8 is connected with a plate heat exchanger 4, the plate heat exchanger 4 is connected with the spraying device 1, a controller 9 is arranged on the outer wall of the exhaust furnace body 5, the outer wall of the exhaust furnace body 5 is connected with a flue 10, the flue 10 is provided with a temperature sensor 11 and a flow sensor 12, the electric regulating valve 3, the temperature sensor 11 and the flow sensor 12 are connected with the controller 9.

[0021] High-temperature flue gas enters the exhaust furnace body 5, the spraying device 1 sprays water uniformly in the flue gas inside the exhaust furnace body 5, the high-temperature flue gas fully contacts with the water mist, and the cooling of the flue gas is realized. The sprayed water and the condensed water vapor form a water flow, which converges to the water collecting tray 13 at the bottom of the exhaust furnace body 5, the water outlet 8 at the bottom edge of the water collecting tray 13 discharges the water, the impurity particles in the water can be filtered out through the filtering device 7, the filtered water flows into the circulating pump 6, the circulating pump 6 pressurizes and delivers the water to the plate heat exchanger 4, the circulating water is cooled in the plate heat exchanger 4, and the cooled circulating water is reconnected to the spraying device 1 inside the exhaust furnace body 5, realizing the recycling of the water, which not only saves water resources, but also ensures the continuous cooling effect.

[0022] The flue gas is discharged from the exhaust furnace body 5 after being cooled, and the temperature sensor 11 and the flow sensor 12 on the flue on the outer wall of the exhaust furnace body 5 continuously monitor the temperature and flow of the flue gas and feed the data to the controller 9 in real time, and the controller 9 dynamically adjusts the opening of the electric regulating valve 3 according to the preset program and the received data, so as to adjust the water spraying amount of the spraying device 1.

[0023] The spraying device 1 is provided with a plurality of atomizing nozzles, which are uniformly distributed on the inner wall of the exhaust furnace body 5, and the angle between the spraying direction of the atomizing nozzles and the flue gas flow direction is set to 25-55 degrees, so that the water mist can fully contact with the flue gas by setting a plurality of atomizing nozzles and uniformly distributing them on the inner wall of the exhaust furnace body 5, and the flue gas temperature can be effectively reduced.

[0024] The filtering device 7 adopts a multi-stage filtering structure, including a stainless steel filter screen 71, an activated carbon filtering layer 72 and a ceramic membrane filter 73 arranged in sequence along the water flow direction, the mesh number of the stainless steel filter screen 71 is 80-120, the thickness of the activated carbon filtering layer 72 is 10-25 cm, and the pore size of the ceramic membrane filter 73 is 0.1-1 μm, so that the water can be preliminarily filtered by the stainless steel filter screen 71 to remove larger impurity particles, then the activated carbon filtering layer 72 can adsorb peculiar smell, pigment and some small molecule organic matters in the water, and finally the ceramic membrane filter 73 can finely filter the water filtered by the previous two stages to effectively intercept bacteria, viruses, colloids and smaller suspended particles in the water.

[0025] The water collecting disc 13 is provided in a shallow disc structure and has a diameter larger than the inner diameter of the bottom of the exhaust furnace body, and the bottom of the water collecting disc 13 is an inclined surface inclined to the water drain port 8 at the edge, so that the water can smoothly flow to the water drain port 8.

[0026] The controller 9 is further connected with a wireless communication module, and the temperature sensor 11, the flow sensor 12 and the electric regulating valve 3 can transmit data to a remote monitoring terminal in real time through the wireless communication module.

[0027] Therefore, the flue gas cooling device of the calcination furnace has the advantages that the water mist can fully contact with the flue gas by the spraying device, the contact area is increased, and the flue gas temperature can be effectively reduced; the temperature and flow information of the flue gas can be monitored in real time by the temperature sensor and the flow sensor arranged on the flue, and the data can be transmitted to the controller, so that the flue gas cooling process can be accurately controlled; the water resource can be recycled by the water collecting disc, the filtering device, the circulating pump and the plate heat exchanger, the water resource can be saved, and the operation cost can be reduced.

[0028] It should be pointed out finally that: the above examples are only used to illustrate the technical solutions of the utility model and not to limit them, although the utility model has been explained in detail with reference to the preferred embodiments, ordinary skilled in the art should understand that: its still can modify or equivalent replace the technical solutions of the utility model, and these modifications or equivalent replacements also can not make the modified technical solutions deviate from the spirit and scope of the technical solutions of the utility model.

Claims

1. A calciner flue gas cooling device, characterized by: The exhaust furnace body is provided with a spraying device on the inner wall, the lower end of the spraying device is connected with a water supply valve through screw thread, the water supply valve is provided with an electric regulating valve, the bottom of the exhaust furnace body is provided with a water collecting tray, the bottom edge of the water collecting tray is provided with a drain port, the drain port and the circulating pump are connected with a filtering device through a pipeline, the end of the circulating pump away from the drain port is connected with a plate heat exchanger, the plate heat exchanger is connected with the spraying device, the outer wall of the exhaust furnace body is provided with a controller, the outer wall of the exhaust furnace body is connected with a flue, the flue is provided with a temperature sensor and a flow sensor, the electric regulating valve, the temperature sensor and the flow sensor are connected with the controller.

2. A flue gas cooling device for a calcining furnace according to claim 1, characterized in that: The spraying device is provided with a plurality of atomizing nozzles, the atomizing nozzles are uniformly arranged on the inner wall of the exhaust furnace body, and the included angle between the spraying direction of the atomizing nozzles and the flue gas flow direction is 25-55 degrees.

3. A flue gas cooling device for a calcining furnace according to claim 1, characterized in that: The filtering device adopts a multi-stage filtering structure and comprises a stainless steel filter screen, an activated carbon filter layer and a ceramic membrane filter which are sequentially arranged along the water flow direction, the mesh number of the stainless steel filter screen is 80-120, the thickness of the activated carbon filter layer is 10-25 cm, and the pore size of the ceramic membrane filter is 0.1-1 μm.

4. A flue gas cooling device for a calcining furnace according to claim 1, characterized in that: The water collecting tray is provided in a shallow disc structure and has a diameter greater than the inner diameter of the bottom of the exhaust furnace body, and the bottom of the water collecting tray is an inclined surface inclined to the drain port at the edge.

5. A flue gas cooling device for a calcining furnace according to claim 1, characterized in that: The controller is also connected with a wireless communication module for remote monitoring and data transmission.

Images