Reactor for water lifting and tempering of flue gas

Abstract

The utility model discloses a flue gas water lifting and conditioning reactor, which comprises a reactor body and a water inlet pipe, a cavity is arranged in the reactor body, an air lifting pump is vertically arranged in the reactor body, a filler scrubber is arranged at the top end of the air lifting pump, and the bottom of the filler scrubber is communicated with the inner cavity of the reactor body. The top of the filler scrubber is communicated with a wastewater overflow device arranged at the top of the inner cavity of the reactor body, a blow-off pipe is arranged at the bottom of the wastewater overflow device, and a water outlet pipe is arranged at the top of the side wall of the reactor body. The limestone filler in the active limestone reactor disclosed by the utility model is always in a flowing state and is prevented from being coated by calcium sulfate and polluted by other impurities, the reaction efficiency is high, and the effluent quality is stable; and continuous operation can be realized, shutdown backwashing is not needed, the operation efficiency is high, a backwashing water pump, a fan and auxiliary pipeline valves thereof are not needed, the investment cost is low, and the operation energy consumption is low.

Description

Technical Field

[0001] The utility model relates to a reactor for flue gas water extraction and conditioning, belonging to the technical field of water treatment equipment. Background Art

[0002] Flue gas water extraction technology is a new process technology for extracting condensed water from desulfurized saturated clean flue gas. It is based on the principle of phase change condensation of wet saturated water vapor under different partial pressures. It uses the wet saturated or supersaturated conditions of flue gas after desulfurization, adopts cooling means, condenses and collects condensed water in the flue gas for recycling. The recycling of flue gas water extraction is the main promotion technology for water saving in coal-fired power plants in areas with scarce water resources.

[0003] The residual SO2, dust and other pollutants in the clean flue gas after desulfurization cause the pH value of flue gas water extraction to be low, the sulfate ion (SO42-) content to be high and the water quality to be unstable, and it needs to undergo certain tempering treatment before it can be recycled. The method of using limestone (CaCO3) to neutralize and temper the flue gas water extraction is one of the tempering processes, which has the characteristics of low operating costs, simple operation and maintenance, no secondary pollution to the environment, and good tempering effect. The disadvantage of the limestone tempering process is that slightly soluble calcium sulfate (CaSO4) will be generated during the reaction of flue gas water extraction and limestone. CaSO4 will be partially coated on the limestone particles, affecting the reaction efficiency of the limestone. Therefore, this patent provides an active limestone reactor to solve the problem of calcium sulfate coating. Utility Model Content

[0004] The utility model aims to provide a flue gas water extraction and conditioning reactor, which has the characteristics of low operating cost, simple operation and maintenance, no secondary pollution to the environment, good conditioning effect, etc., and solves the problem of calcium sulfate coating limestone.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme: a reactor for flue gas water lifting and tempering, comprising a reactor body with a cavity inside, and a water inlet pipe, the water inlet pipe penetrates the side wall of the reactor body and extends to the inner cavity, the water outlet end of the water inlet pipe is placed in the middle of the reactor body, an air lift pump is vertically arranged inside the reactor body, the bottom end of the air lift pump is placed at the bottom of the inner cavity of the reactor body, the air lift pump is placed in the middle of the reactor body and penetrates the vertical part of the water inlet pipe, the vertical part of the water inlet pipe is an annular pipeline, a filler scrubber is arranged at the top of the air lift pump, the bottom of the filler scrubber is connected with the inner cavity of the reactor body, the top of the filler scrubber is connected with a wastewater overflow device arranged at the top of the inner cavity of the reactor body, a sewage pipe is arranged at the bottom of the wastewater overflow device, a water outlet pipe is arranged at the top of the side wall of the reactor body, and the inner cavity of the reactor body is filled with limestone filler.

[0006] In the aforementioned flue gas water extraction and conditioning reactor, the water inlet pipe is placed at one end of the reactor body and is connected to a water inlet distributor, which is placed in a horizontal direction so that water flows from bottom to top in reverse flow through the limestone filler to react fully and evenly with it.

[0007] In the aforementioned flue gas water extraction and conditioning reactor, a material guide cone is installed in the inner cavity of the reactor body, and the material guide cone is placed below the water outlet end of the water inlet pipe to guide the filler to pass through the reaction area better.

[0008] In the aforementioned flue gas water extraction and conditioning reactor, one end of a compressed air inlet pipe is installed at the bottom end of the air lift pump, and the other end of the compressed air inlet pipe extends upward along the air lift pump to the outside of the reactor body and is connected to an external air supply device.

[0009] In the aforementioned flue gas water extraction and conditioning reactor, a water outlet overflow weir is provided on the top of the inner wall of the reactor body, and the water outlet overflow weir is provided on the inner side of the water outlet pipe, and the water outlet overflow weir further reduces the turbidity of the water outlet.

[0010] The aforementioned flue gas water extraction and conditioning reactor has an adjusting weir inside the wastewater overflow device, which can adjust the liquid level difference inside and outside the wastewater overflow device, control the liquid level difference between the cleaning wastewater and the external produced water, and ensure that the wastewater discharge volume is minimized while meeting the turbidity of the effluent.

[0011] In the aforementioned flue gas water extraction and conditioning reactor, the water inlet pipe is located at one end outside the reactor body and is provided with an exhaust pipe for timely exhausting the gas in the water inlet pipe and increasing the water inlet flow rate.

[0012] In the aforementioned flue gas water extraction and conditioning reactor, an exhaust pipe is provided at the bottom of the reactor body.

[0013] In the aforementioned flue gas water extraction and conditioning reactor, a splash guard is provided on the top of the air lift pump to prevent splashing of the gas-water and filler mixture.

[0014] Compared with the prior art, the utility model has at least the following beneficial effects:

[0015] (1) The limestone filler in the active limestone reactor of the utility model is always in a flowing state, free from the coating of calcium sulfate and contamination of other impurities, with high reaction efficiency and stable effluent water quality;

[0016] (2) The active limestone reactor of the utility model can operate continuously without stopping for backwashing, and has high operating efficiency;

[0017] (3) The active limestone reactor of the utility model does not require a backwashing water pump, a fan and its associated pipeline valves, so the investment cost is low and the operating energy consumption is low;

[0018] (4) The active limestone reactor of the utility model has a small pressure loss, no more than 0.5m, and low energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure markings: 1-reactor body, 2-water inlet pipe, 3-water inlet distributor, 4-material guide cone, 5-air lift pump, 6-filling scrubber, 7-wastewater overflow device, 8-outlet overflow weir plate, 9-outlet pipe, 10-drain pipe, 11-compressed air inlet pipe, 12-exhaust pipe, 13-bottom drain pipe, 14-limestone filler.

[0021] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. DETAILED DESCRIPTION

[0022] Embodiment 1 of the utility model: A reactor for flue gas water lifting and tempering, comprising a reactor body 1 with a cavity inside, and a water inlet pipe 2, wherein the water inlet pipe 2 penetrates the side wall of the reactor body 1 and extends to the inner cavity, and the water outlet end of the water inlet pipe 2 is placed in the middle of the reactor body 1, and an air lift pump 5 is vertically arranged inside the reactor body 1, and the bottom end of the air lift pump 5 is placed at the bottom of the inner cavity of the reactor body 1, and the air lift pump 5 is placed in the middle of the reactor body 1 and penetrates the vertical part of the water inlet pipe 2, and the vertical part of the water inlet pipe 2 is an annular pipeline, and a filler scrubber 6 is arranged at the top of the air lift pump 5, and the bottom of the filler scrubber 6 is communicated with the inner cavity of the reactor body 1, and the top of the filler scrubber 6 is connected with a wastewater overflow device 7 arranged at the top of the inner cavity of the reactor body 1, and a sewage pipe 10 is arranged at the bottom of the wastewater overflow device 7, and a water outlet pipe 9 is arranged at the top of the side wall of the reactor body 1, and the inner cavity of the reactor body 1 is filled with limestone filler 14.

[0023] Embodiment 2 of the present utility model: A flue gas water-lifting and conditioning reactor comprises a reactor body 1 with a cavity inside, and a water inlet pipe 2, wherein the water inlet pipe 2 penetrates the side wall of the reactor body 1 and extends to the inner cavity, and the water outlet end of the water inlet pipe 2 is placed in the middle of the reactor body 1, and an air lift pump 5 is vertically arranged inside the reactor body 1, and the bottom end of the air lift pump 5 is placed at the bottom of the inner cavity of the reactor body 1, and the air lift pump 5 is placed in the middle of the reactor body 1 and penetrates the vertical part of the water inlet pipe 2, and the vertical part of the water inlet pipe 2 is an annular pipeline, and the water inlet pipe 2 is placed at one end of the reactor body 1 and is connected to a water inlet distributor 3, The water inlet pipe 2 is located in the middle of the water inlet distributor 3, and the water inlet distributor 3 is placed in the horizontal direction so that the water flows from bottom to top through the limestone filler 14 to react fully and evenly with it. A filler scrubber 6 is arranged at the top of the air lift pump 5, and the bottom of the filler scrubber 6 is connected to the inner cavity of the reactor body 1. The top of the filler scrubber 6 is connected to the wastewater overflow device 7 arranged at the top of the inner cavity of the reactor body 1, and the bottom of the wastewater overflow device 7 is arranged with a sewage pipe 10, and the top of the side wall of the reactor body 1 is arranged with a water outlet pipe 9, and the inner cavity of the reactor body 1 is filled with limestone filler 14.

[0024] Embodiment 3 of the present utility model: A flue gas water-lifting and conditioning reactor comprises a reactor body 1 with a cavity inside, and a water inlet pipe 2, wherein the water inlet pipe 2 penetrates the side wall of the reactor body 1 and extends to the inner cavity, and the water outlet end of the water inlet pipe 2 is placed in the middle of the reactor body 1, and an air lift pump 5 is vertically arranged inside the reactor body 1, and the bottom end of the air lift pump 5 is placed at the bottom of the inner cavity of the reactor body 1, and the air lift pump 5 is placed in the middle of the reactor body 1 and penetrates the vertical part of the water inlet pipe 2, and the vertical part of the water inlet pipe 2 is an annular pipeline, and the water inlet pipe 2 is placed at one end of the reactor body 1 and is connected to a water inlet distributor 3, and the water inlet pipe 2 is located in the middle of the water inlet distributor 3, and the water inlet distributor 3 is arranged along the horizontal direction. The air lift pump 5 is placed so that water flows from bottom to top in reverse flow through the limestone filler 14 to react fully and evenly therewith. A filler scrubber 6 is provided at the top of the air lift pump 5. The bottom of the filler scrubber 6 is communicated with the inner cavity of the reactor body 1. The top of the filler scrubber 6 is communicated with a wastewater overflow device 7 arranged at the top of the inner cavity of the reactor body 1. A sewage pipe 10 is provided at the bottom of the wastewater overflow device 7. An outlet pipe 9 is provided at the top of the side wall of the reactor body 1. The inner cavity of the reactor body 1 is filled with limestone filler 14. A material guide cone 4 is installed in the inner cavity of the reactor body 1. The material guide cone 4 is placed below the outlet end of the water inlet pipe 2 to guide the filler to pass through the reaction area better.

[0025] Embodiment 4 of the present utility model: A reactor for flue gas water extraction and tempering, comprising a reactor body 1 with a cavity inside, and a water inlet pipe 2, wherein the water inlet pipe 2 penetrates the side wall of the reactor body 1 and extends to the inner cavity, and the water outlet end of the water inlet pipe 2 is placed in the middle of the reactor body 1, and an air lift pump 5 is vertically arranged inside the reactor body 1, and the bottom end of the air lift pump 5 is placed at the bottom of the inner cavity of the reactor body 1, and the air lift pump 5 is placed in the middle of the reactor body 1 and penetrates the vertical part of the water inlet pipe 2, and the vertical part of the water inlet pipe 2 is an annular pipeline, and the water inlet pipe 2 is placed at one end of the reactor body 1 and is connected to a water inlet distributor 3, and the water inlet pipe 2 is located in the middle of the water inlet distributor 3, and the water inlet distributor 3 is placed in a horizontal direction so that water flows from bottom to top countercurrently through the limestone filler 14 to react fully and evenly with it, and a filler scrubber 6 is arranged on the top of the air lift pump 5, and the bottom of the filler scrubber 6 is connected to the bottom of the limestone filler 14. The inner cavity of the reactor body 1 is connected, the top of the filler scrubber 6 is connected to the wastewater overflow device 7 arranged at the top of the inner cavity of the reactor body 1, the bottom of the wastewater overflow device 7 is provided with a sewage pipe 10, and the top of the side wall of the reactor body 1 is provided with a water outlet pipe 9. The inner cavity of the reactor body 1 is filled with limestone filler 14, and the inner cavity of the reactor body 1 is installed with a guide cone 4, and the guide cone 4 is placed below the outlet end of the water inlet pipe 2 to guide the filler to pass through the reaction area better. The top of the inner side wall of the reactor body 1 is provided with an outlet overflow weir plate 8, and the outlet overflow weir plate 8 is arranged on the inner side of the outlet pipe 9. The outlet overflow weir plate 8 further reduces the turbidity of the outlet water. The wastewater overflow device 7 is provided with an adjusting weir inside, which can adjust the liquid level difference inside and outside the wastewater overflow device 7, control the liquid level difference between the cleaning wastewater and the external produced water, and ensure that the wastewater discharge is minimized under the premise of meeting the turbidity of the outlet water.

[0026] Specifically, the air lift pump 5 is composed of a pump cavity, a pump pipe and a compressed air pipe. One end of a compressed air inlet pipe 11 is installed at the bottom end of the air lift pump 5. The other end of the compressed air inlet pipe 11 extends upward along the air lift pump 5 to the outside of the reactor body 1 and is connected to an external air supply device. External compressed air enters the pump cavity in the air lift pump 5 through the compressed air inlet hose 11. During the process of the compressed air rising in the pump pipe, the pressure in the pump pipe will be lower than the external pressure. The pressure difference between the inside and outside of the lift pump 5 causes the filler and water mixture at the bottom of the reactor to rise along the pipeline of the air lift pump 5.

[0027] Specifically, an exhaust pipe 12 is provided at one end of the water inlet pipe 2 located outside the reactor body 1, which is used to timely exhaust the gas in the water inlet pipe 2 and increase the water inlet flow rate.

[0028] Specifically, a drain pipe 13 is provided at the bottom of the reactor body 1 .

[0029] Specifically, a splash shield is provided on the top of the air lift pump 5 to prevent the rising air bubbles from causing the mixture to splash.

[0030] The working principle of an embodiment of the utility model: the utility model is based on the countercurrent principle. During use, the flue gas water to be reacted enters the annular water distributor 3 located at the bottom of the reactor body 1 through the water inlet pipe 2, and then evenly enters the reactor body 1. The water flows countercurrently from bottom to top through the limestone filler 14 to react fully and evenly with it, and at the same time, it will intercept and adsorb impurities in the raw water. The filtrate after the reaction is collected at the top of the reactor body 1, and flows out through the outlet overflow weir plate 8 and the outlet pipe 9 to complete the reaction process; the external compressed air enters the pump cavity in the air lift pump 5 through the compressed air intake hose 11. During the process of the compressed air rising in the pump pipe, the pressure in the pump pipe will be lower than the external pressure. The pressure difference between the inside and outside of the lift pump 5 causes the filler and water mixture at the bottom of the reactor to rise along the pipeline of the air lift pump 5. The limestone particles participating in the reaction gathered at the bottom of the reactor body 1 are lifted to the filler scrubber 6 located at the top of the reactor through the air lift pump 5. When the filler When the mixture of calcium sulfate and water leaves the outlet of the air lift pump 5, it falls into the filler scrubber 6 at a decreasing rate due to gravity. The filler scrubber 6 is in the form of a double-sided corrugated tube. When the filler descends through the tortuous path, it is forced to do eddy motion. The calcium sulfate and other impurities coated on the limestone are separated from the limestone particles through the turbulent effect. The separated calcium sulfate and other impurities are in powder form. The limestone particles have a relatively large particle size. The removed impurities are washed by the rising water flow and enter the wastewater overflow device 7. The wastewater overflow device 7 is internally provided with an adjusting weir to control the liquid level difference between the cleaning wastewater and the external produced water, so as to ensure that the wastewater discharge volume is minimized under the premise of meeting the turbidity of the outlet water. The separated impurities are discharged through the wastewater overflow device 7 and the sewage pipe 10, and the net filler returns to the reactor 1 by its own weight to realize continuous reaction. The guide cone 4 at the lower part of the reactor guides the filler to pass through the reaction area better, and the exhaust pipe 12 at the water inlet end is used to discharge the gas in the water inlet pipe in time to increase the water inlet flow rate.

Claims

1. A flue gas water extraction and conditioning reactor, characterized in that: The invention comprises a reactor body (1) having a cavity therein, and a water inlet pipe (2), wherein the water inlet pipe (2) penetrates the side wall of the reactor body (1) and extends to the inner cavity, an air lift pump (5) is vertically arranged inside the reactor body (1), the bottom end of the air lift pump (5) is placed at the bottom of the inner cavity of the reactor body (1), a filler scrubber (6) is arranged at the top of the air lift pump (5), the bottom of the filler scrubber (6) is communicated with the inner cavity of the reactor body (1), the top of the filler scrubber (6) is communicated with a wastewater overflow device (7) arranged at the top of the inner cavity of the reactor body (1), a sewage pipe (10) is arranged at the bottom of the wastewater overflow device (7), a water outlet pipe (9) is arranged at the top of the side wall of the reactor body (1), and the inner cavity of the reactor body (1) is filled with limestone filler (14).

2. A flue gas water extraction and conditioning reactor according to claim 1, characterized in that: One end of the water inlet pipe (2) placed on the reactor body (1) is connected to a water inlet distributor (3), and the water inlet distributor (3) is placed in a horizontal direction.

3. A flue gas water extraction and conditioning reactor according to claim 1, characterized in that: The inner cavity of the reactor body (1) is provided with a material guide cone (4), and the material guide cone (4) is placed below the water outlet end of the water inlet pipe (2).

4. A flue gas water extraction and conditioning reactor according to claim 1, characterized in that: One end of a compressed air inlet pipe (11) is installed at the bottom end of the air lift pump (5), and the other end of the compressed air inlet pipe (11) extends upward along the air lift pump (5) to the outside of the reactor body (1) and is connected to an external air supply device.

5. A flue gas water extraction and conditioning reactor according to claim 1, characterized in that: A water outlet overflow weir plate (8) is arranged at the top of the inner side wall of the reactor body (1), and the water outlet overflow weir plate (8) is arranged on the inner side of the water outlet pipe (9).

6. A flue gas water extraction and conditioning reactor according to claim 1, characterized in that: The wastewater overflow device (7) is provided with an adjusting weir inside, which can adjust the liquid level difference inside and outside the wastewater overflow device (7).

7. A flue gas water extraction and conditioning reactor according to claim 1, characterized in that: An exhaust pipe (12) is provided at one end of the water inlet pipe (2) located outside the reactor body (1).

8. A flue gas water extraction and conditioning reactor according to claim 1, characterized in that: The bottom of the reactor body (1) is provided with an exhaust pipe (13).

9. A flue gas water extraction and conditioning reactor according to claim 1, characterized in that: A splash shield is provided on the top of the air lift pump (5).

Images