Mother liquor carbonization treatment device

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a mother liquor carbonization treatment device which comprises a heating furnace, a liquid spraying mechanism and a scraping piece, a material receiving surface is arranged at the bottom in the heating furnace and is obliquely arranged; a liquid inlet area for storing mother liquid is formed on one side of the lower end of the material receiving surface in the heating furnace; the liquid spraying mechanism comprises a pump and a plurality of sprayers, and the pump is used for pumping mother liquid in the liquid inlet area to the sprayers; the scraping piece is arranged in the heating furnace and can be attached to the material receiving face to scrape waste salt falling on the material receiving face from the low end of the inclined face to the high end of the inclined face. The spray head spraying mode can improve the dispersion range of the mother liquor and improve the heat efficiency; and the mother liquor in the heating furnace can be circularly extracted and sprayed out for carbonization treatment, so that full carbonization of the mother liquor is facilitated. In addition, through cleaning and scraping of the scraping piece, the mother liquor on the material receiving face can be prevented from bringing the carbonized salt back to the liquid inlet area in the backflow process to a large extent.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, and particularly relates to a mother liquor carbonization treatment device. Background Art

[0002] Some existing chemical plants will generate a large amount of high-salt wastewater during daily production. These high-salt wastewaters need to be treated before being discharged. In related treatment processes, an evaporator is used to evaporate the waste liquid. After evaporation, three substances will be produced. One is distilled water, which can be directly sent to the sewage treatment pool for treatment. The second is waste salt, and the third is mother liquor. The mother liquor is wastewater with a high COD concentration and a saturated salt concentration. If these mother liquors are directly discharged, it will cause great pollution to the environment. Therefore, a device capable of treating mother liquor needs to be designed. Summary of the Utility Model

[0003] In order to solve at least one technical problem mentioned in the background art, the purpose of the utility model is to provide a mother liquor carbonization treatment device.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A mother liquor carbonization treatment device includes a heating furnace, a liquid spraying mechanism and a scraping member. A receiving surface is provided at the inner bottom of the heating furnace, and the receiving surface is inclined to form a high end and a low end. An inlet liquid area for storing mother liquor is formed on the low end side of the receiving surface inside the heating furnace. The liquid spraying mechanism includes a pump and a plurality of spray heads. The pump is used to extract the mother liquor from the inlet liquid area to the spray heads, and the mother liquor is sprayed in the heating furnace by the spray heads. The scraping member is arranged inside the heating furnace and can scrape the waste salt falling on the receiving surface from the low end to the high end of the inclined surface along the receiving surface.

[0006] As an optional implementation manner of the utility model, the spray head can rotate self-during liquid spraying.

[0007] As an optional implementation manner of the utility model, the liquid spraying mechanism further includes a liquid inlet pipe connected to the liquid outlet end of the pump. The spray head is rotatably installed on the liquid inlet pipe around a first axis. The spray head includes at least two spray openings, and the at least two spray openings are circumferentially arranged around the first axis, so that the spray head can rotate self-under the reaction force of the liquid flow when the liquid flow is ejected from the spray openings.

[0008] As an optional implementation manner of the utility model, at least a part of the liquid inlet pipe extends along the length direction of the heating furnace to form an extension section, and the spray heads are sequentially arranged on the extension section along the length direction of the extension section.

[0009] As an alternative embodiment of the present utility model, the scraping member is driven by a driving mechanism to reciprocate between the low end and the high end of the material receiving surface along the extending direction of the material receiving surface; wherein the scraping plate includes a first state and a second state; in the first state, the scraping member is in contact with the material receiving surface; in the second state, the scraping plate is separated from the material receiving surface; wherein, the scraping plate maintains the first state during the movement from the low end to the high end of the material receiving surface, and maintains the second state during the movement from the high end to the low end of the material receiving surface.

[0010] As an alternative embodiment of the present utility model, the driving mechanism includes one or more sets of closed-loop chains disposed in the furnace body and driven by a motor to rotate, the chains are disposed above the material receiving surface and extend along the extending direction of the material receiving surface; the scraping plate is fixed on the chain and is driven by the chain to reciprocate between the low end and the high end of the material receiving surface.

[0011] As an alternative embodiment of the present utility model, the scraping member is a scraping net or a scraping plate.

[0012] As an alternative embodiment of the present utility model, an interlayer space is formed inside the peripheral wall of the heating furnace, and the heating furnace realizes heating by introducing steam into the interlayer space or is provided with electric heating elements in the interlayer space.

[0013] As an alternative embodiment of the present utility model, the heating furnace includes an outer shell with an inner shell sleeved outside the outer shell, and the inner shell and the outer shell are spaced apart to form the interlayer space.

[0014] As an alternative embodiment of the present utility model, a slope plate is provided at the inner bottom of the heating furnace, and the slope plate constitutes the material receiving surface; or the inner side surface of the inner bottom wall of the heating furnace constitutes the material receiving surface.

[0015] Compared with the prior art, the advantages of adopting this solution are as follows:

[0016] The present utility model realizes the treatment of the mother liquor by setting a heating furnace and spraying the mother liquor into the heating furnace by means of a nozzle, so that the mother liquor is heated and carbonized in the heating furnace, mainly the organic matter in the mother liquor is carbonized to form carbide and waste salt.

[0017] Spraying the mother liquor in this way of nozzle spraying for heating can increase the dispersion range of the mother liquor and improve the thermal efficiency.

[0018] In addition, by providing an inclined material receiving surface in the heating furnace, the carbide salt (a mixture of carbide and waste salt) generated during the carbonization process and the dripping mother liquor will fall onto the material receiving surface; the mother liquor will flow back along the material receiving surface to the liquid inlet area and be pumped again by the pump and sprayed out, so that the mother liquor in the heating furnace can be circulated and pumped and sprayed out, which is beneficial to the full carbonization of the mother liquor.

[0019] Moreover, by providing a scraping member, the carbides and waste salts falling on the material receiving surface can be scraped towards the high-end side of the material receiving surface, so that the carbides and waste salts can be concentrated together for convenient unified collection in the later stage. In addition, through the scraping of the scraping member, it is possible to largely prevent the mother liquor on the material receiving surface from bringing these carbide salts back into the liquid inlet area during the reflux process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the front sectional view of the present utility model;

[0021] Figure 2 is the top sectional view of the present utility model;

[0022] Figure 3 is Figure 2 the partial enlarged view of the position of the nozzle in

[0023] Figure 4 is the radial sectional view of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions of the embodiments of the present utility model will be explained and described below with reference to the accompanying drawings of the embodiments of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model and not all of them. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present utility model.

[0025] In the following description, terms indicating orientation or positional relationship such as "inner", "outer", "upper", "lower", "left", "right", etc. are only for convenient description of the embodiments and simplification of the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0026] The high-concentration and high-salt wastewater output from the chemical plant will produce three substances after evaporation treatment. One is distilled water, which can be directly sent to the sewage treatment tank for treatment; the second is waste salt, and the third is mother liquor. Among them, the mother liquor is wastewater with a high COD concentration and a saturated salt concentration. Based on this, the present utility model mainly provides a mother liquor carbonization treatment device, which is mainly used for carbonizing the mother liquor containing organic matter.

[0027] High-salt wastewater refers to wastewater with a salt content of more than 1.5%;

[0028] High-concentration wastewater refers to wastewater with a COD concentration of more than 2000 mg / L.

[0029] As Figures 2-4 shown, this embodiment provides a mother liquor carbonization treatment device, including a heating furnace 1, a liquid spraying mechanism, and a scraping member 6.

[0030] The heating furnace 1 is mainly used for heating the mother liquor, and it can be heated by steam or by an electric heating element.

[0031] In some embodiments, as Figure 1 shown, the heating furnace 1 mainly includes an inner shell 12, an outer shell 11 sleeved outside the inner shell 12, and end plates 13 provided at both ends of the inner shell 12 and the outer shell 11; the inner shell 12 and the outer shell 11 together form the peripheral wall of the heating furnace 1, and the end plates 13 at both ends form the end walls at both ends of the heating furnace 1.

[0032] A sandwich space 10 is formed by arranging the inner shell 12 and the outer shell 11 at intervals; optionally, as Figure 4 shown, both the inner shell 12 and the outer shell 11 are cylindrical structures and are coaxially arranged.

[0033] The heating furnace 1 is heated by introducing steam into the sandwich space 10 or by providing an electric heating element in the sandwich space 10.

[0034] Taking the steam heating method as an example: as Figure 1 shown, a steam inlet 132 is provided on the end plate 13 or the outer shell 11 for connecting to an external steam pipeline, and the steam output from the steam pipeline enters the sandwich space 10 through the steam inlet 132 to heat the inner shell 12, thereby realizing the heating inside the heating furnace 1.

[0035] It should be noted that during heating, it is preferably to set the temperature inside the furnace between 550°C and 650°C.

[0036] In addition, during the heating and carbonization treatment of the mother liquor, it is preferably to introduce substances that isolate oxygen from entering the furnace body, such as nitrogen or hot steam, etc.; in this way, the generation of dioxins during the carbonization process can be reduced.

[0037] In some embodiments, in order to discharge the condensed water generated by the condensation of the steam in the sandwich space 10 later, a condensed water discharge port 111 is provided at the bottom of the outer shell 11. In order to control the on / off of the condensed water discharge port 111, the condensed water discharge port 111 can be connected to a valve.

[0038] In addition, in some embodiments, a mother liquor inlet 131 is provided on the end plate 13. The mother liquor inlet 131 is mainly used to connect to the mother liquor input pipeline, and the mother liquor enters the heating furnace 1 through the mother liquor input pipeline via the mother liquor inlet 131.

[0039] As Figure 1As shown, a material receiving surface 31 is provided at the inner bottom of the heating furnace 1. The material receiving surface 31 is inclined, such that one end of the material receiving surface 31 is high and the other end is low. For the convenience of description, the high end of the material receiving surface 31 is denoted as the high end 3b, and the low end is denoted as the low end 3a.

[0040] In some embodiments, a ramp plate 3 is provided at the inner bottom of the heating furnace 1, and the material receiving surface 31 is constituted by the ramp plate 3.

[0041] In other embodiments, the inner side surface of the inner bottom wall of the heating furnace 1 constitutes the material receiving surface 31. For example, a part of the inner side surface of the inner bottom wall of the heating furnace 1 is inclined and protruded upward as the material receiving surface 31.

[0042] An inlet liquid area 4 for storing mother liquor is formed on one side of the low end 3a of the material receiving surface 31 inside the heating furnace 1. Specifically, the low end 3a of the material receiving surface 31 is connected to the bottom wall of the inner housing 12 through an inclined transition plate 32. An inlet liquid area 4 is enclosed and formed between the transition plate 32 and the right end plate 13. Among them, the bottom surface of the inlet liquid area 4 is lower than the low end 3a of the material receiving surface 31, which is equivalent to having a concave area on one side of the low end 3a of the material receiving surface 31 as the inlet liquid area 4.

[0043] The liquid spraying mechanism includes a pump 21 and a plurality of spray heads 23. The pump 21 is arranged in the inlet liquid area 4 and is used to extract the mother liquor in the inlet liquid area 4 to the spray heads 23, and then the mother liquor is sprayed inside the heating furnace 1 by the spray heads 23.

[0044] The specific connection between the spray head 23 and the pump 21 is as follows: As Figure 1 shown, a liquid inlet pipe 22 is connected to the liquid outlet end of the pump 21, and the end of the liquid inlet pipe 22 away from the pump 21 is closed. At least a part of the liquid inlet pipe 22 extends along the length direction of the heating furnace 1 (i.e., the axial direction of the heating furnace 1) to form an extension section 221, and the spray heads 23 are sequentially arranged on the extension section 221 along the length direction of the extension section 221.

[0045] During operation, the heating furnace 1 is heated. The pump 21 extracts the mother liquor in the inlet liquid area 4. The extracted mother liquor flows to the spray heads 23 through the liquid inlet pipe 22, and finally is sprayed out by the spray heads 23. The sprayed mother liquor is dispersed and heated and carbonized inside the heating furnace 1. In particular, the organic matter in the mother liquor is carbonized, and finally a carbonized salt is formed. The carbonized salt refers to a mixture of carbide and waste salt. In this way, the treatment of the mother liquor is realized.

[0046] Subsequently, according to the characteristics that the carbonized substance is insoluble in water and the salt is soluble in water, the carbonized salt can be dissolved by adding water and dissolved, and the carbide and brine are separated by filtration; the carbide has a certain calorific value and can be used for burning pulverized coal, and the brine can be obtained as recycled salt after evaporation and crystallization treatment. These salts can be used as industrial salts after screening.

[0047] Of course, in some scenarios, before dissolving the carbonized salt, the obtained carbonized salt can be further carbonized to fully carbonize the organic matter in the carbonized salt.

[0048] The mother liquor is sprayed by this spray head 23 for heating, which can increase the dispersion range of the mother liquor and improve the thermal efficiency.

[0049] The carbonized salt generated during the carbonization of the mother liquor and the mother liquor dripping from the spray head 23 will fall onto the material receiving surface 31; since the material receiving surface 31 is inclined, the mother liquor on the material receiving surface 31 flows back along the material receiving surface 31 and returns to the liquid inlet area 4 to be pumped again by the pump 21 and sprayed out. In this way, the mother liquor in the heating furnace 1 can be circulated and pumped and sprayed out, which is beneficial to the full carbonization of the mother liquor.

[0050] The scraping member 6 is arranged in the heating furnace 1 and can scrape the waste salt falling on the material receiving surface 31 from the lower end 3a to the upper end 3b of the inclined surface along the material receiving surface 31.

[0051] In this way, through the scraping of the scraping member 6, to a large extent, it can be avoided that the mother liquor on the material receiving surface 31 brings the carbonized salt falling on the material receiving surface 31 back to the liquid inlet area 4 during the reflux process.

[0052] Moreover, by arranging the scraping member 6, the carbides and waste salts falling on the material receiving surface 31 can be scraped towards the upper end 3b side of the material receiving surface 31, so that the carbides and waste salts can be concentrated together for convenient unified collection in the later stage.

[0053] In some embodiments, as Figure 1 shown, a concave area is formed on the upper end 3b side of the material receiving surface 31 as a material receiving groove 33, and the carbonized salt on the material receiving surface 31 is finally scraped into the material receiving groove 33 by the scraping member 6.

[0054] Of course, in other embodiments, the material receiving groove 33 may not be provided, and the scraping member 6 only needs to directly scrape the carbonized salt on the material receiving surface 31 to the upper end 3b of the material receiving surface 31.

[0055] As Figure 4 shown, the cross-section of the material receiving surface 31 in the radial direction of the heating furnace 1 is a concave arc structure, and the corresponding scraping member 6 is also an arc structure to be adapted to the material receiving surface 31.

[0056] The scraping member 6 can be a scraping plate or a scraping net. Here, the scraping net refers to a mesh scraping plate. Preferably, a scraping net is used. During the scraping process, the mother liquor can flow back into the liquid inlet area 4 through the mesh holes of the scraping net, while the carbonized salt is scraped towards the upper end 3b of the material receiving surface 31.

[0057] In some embodiments, the spray head 23 can rotate around the first axis during liquid spraying, where the first axis is vertically perpendicular to the axial direction of the heating furnace 1; specifically:

[0058] The nozzle 23 is rotatably mounted on the liquid inlet pipe 22 about a first axis;

[0059] As Figure 1 and Figure 3 shown, the nozzle 23 includes a straight pipe section 232 which is rotatably connected to the extension section 221 about the first axis; at least two spray nozzles 231 are provided at the upper end of the straight pipe section 232, and the at least two spray nozzles 231 are arranged in a circumferential array centered on the first axis.

[0060] The spraying direction of the spray nozzle 231 is the horizontal direction, and the extension line of the spraying direction of the spray nozzle 231 deviates from the first axis. For example, as Figure 3 shown, one spray nozzle 231 sprays to the left and the other spray nozzle 231 sprays to the right; thus when spraying the mother liquor, the mother liquor enters the main pipe section from the liquid inlet pipe 22 and then flows from the straight pipe section 232 to each spray nozzle 231. Since the extension line of the spraying direction of each spray nozzle 231 deviates from the first axis, when the mother liquor is sprayed out of the spray nozzle 231, a reaction force will be generated, thereby driving the straight pipe section 232 to rotate about the first axis, and further driving the entire nozzle 23 to rotate about the first axis.

[0061] Spraying the liquid in such a way that the nozzle 23 is driven to rotate has the following significance. First, since the nozzle 23 is rotating, the spraying range of the nozzle 23 can be increased, so that the mother liquor is dispersed in a large range in the furnace to improve the thermal efficiency; second, when the nozzle 23 is rotating, a centrifugal force will be generated, and under the action of the centrifugal force, some carbide salt particles in the spray nozzle 231 can be thrown out, reducing the risk of these particles clogging the spray nozzle 231.

[0062] The scraping member 6 is driven by a driving mechanism to reciprocate between the low end 3a and the high end 3b of the material receiving surface 31 along the extending direction of the material receiving surface 31, that is, under the drive of the driving mechanism, the scraping plate will move from the low end 3a of the material receiving surface 31 to the high end 3b and then return from the high end 3b to the low end 3a to wait for the next cycle.

[0063] In order to prevent the scraping member 6 from scraping the carbide salt on the material receiving surface 31 to the low end 3a when the scraping member 6 returns from the high end 3b to the low end 3a, in this embodiment, the scraping member 6 includes a first state and a second state;

[0064] In the first state, the scraping member 6 is in contact with the material receiving surface 31, and the scraping member 6 maintains the first state during the process of moving from the low end 3a to the high end 3b of the material receiving surface 31 (i.e., moving upward), so that the scraping plate can scrape the carbide salt on the material receiving surface 31 to the high end 3b.

[0065] In the second state, the scraping member 6 is separated from the material receiving surface 31. During the process of the scraping member 6 moving from the high end 3b to the low end 3a of the material receiving surface 31 (i.e., moving downward), it maintains the second state, so that the scraping member 6 will not scrape the carbide salt on the material receiving surface 31 during the downward movement, preventing the carbide salt on the material receiving surface 31 from being scraped towards the liquid inlet area 4.

[0066] In order to enable the scraping member 6 to move in the above two states, in this embodiment, the driving mechanism includes one or more sets of closed-loop chains 51 arranged in the furnace body and driven to rotate by the motor 54. In this embodiment, the case of using two sets of chains 51 is shown, and the two sets of chains 51 are arranged side by side. During the carbonization process, the chains 51 continuously rotate and work.

[0067] The chain 51 is arranged above the material receiving surface 31 and extends along the extension direction of the material receiving surface 31, that is, the chain 51 is also inclined, and its inclination direction and angle are consistent with those of the material receiving surface 31.

[0068] As Figure 1 shown, one end of the scraping member 6 is fixed on the chain 51 and is driven by the chain 51 to reciprocate between the low end 3a and the high end 3b of the material receiving surface 31.

[0069] When the chain 51 rotates, it drives the scraping member 6 to move. When the scraping member 6 moves upward, the scraping member 6 is at the lower part of the chain 51, and the end of the scraping member 6 far from the chain 51 is in contact with the material receiving surface 31 to scrape the carbide salt on the material receiving surface 31 towards the high end 3b; when the scraping member 6 moves to the high end 3b position, as the chain 51 continues to rotate, the scraping member 6 will flip to the upper part of the chain 51, so as to be separated from the material receiving surface 31, and finally the chain 51 will drive the scraping member 6 to the low end 3a of the material receiving surface 31 for the next cycle.

[0070] In this embodiment, the chain 51 and the motor 54 are driven by a sprocket 52. Specifically, the chain 51 is sleeved on two sprockets 52, and the sprockets 52 are fixed on the rotating shafts 53 rotatably connected to the heating furnace 1. The motor 54 is installed outside the heating furnace 1 and is connected to one of the rotating shafts 53. The motor 54 drives the rotating shaft 53 to rotate, and then drives the sprocket 52 to rotate. The rotation of the sprocket 52 drives the chain 51 to rotate to drive the scraping member 6 to act.

[0071] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A mother liquor carbonization treatment device, characterized in that, It includes a heating furnace, a liquid spraying mechanism and a scraping member; a material receiving surface is provided at the inner bottom of the heating furnace, and the material receiving surface is inclined to form a high end and a low end; an inlet liquid area for storing mother liquid is formed on the low end side of the material receiving surface inside the heating furnace; the liquid spraying mechanism includes a pump and a plurality of spray heads, the pump is used to extract the mother liquid in the inlet liquid area to the spray heads, and the mother liquid is sprayed in the heating furnace by the spray heads; the scraping member is arranged in the heating furnace and can scrape the waste salt falling on the material receiving surface from the low end to the high end of the inclined surface along the material receiving surface.

2. The mother liquor carbonization treatment device according to claim 1, characterized in that, The spray head can rotate automatically during liquid spraying.

3. The mother liquor carbonization treatment device according to claim 1, characterized in that, The liquid spraying mechanism further includes a liquid inlet pipe connected to the liquid outlet end of the pump, and the spray head is rotatably mounted on the liquid inlet pipe around a first axis; the spray head includes at least two spray openings, and the at least two spray openings are arranged in a circumferential array centered on the first axis, so that the spray head can rotate automatically under the reaction force of the liquid flow when the liquid flow is sprayed from the spray openings.

4. The mother liquor carbonization treatment device according to claim 3, characterized in that, At least a part of the liquid inlet pipe extends along the length direction of the heating furnace to form an extension section, and the spray heads are sequentially arranged on the extension section along the length direction of the extension section.

5. The mother liquor carbonization treatment device according to claim 1, characterized in that The scraping member is driven by a driving mechanism to reciprocate between the low end and the high end of the material receiving surface along the extension direction of the material receiving surface; Wherein the scraping member includes a first state and a second state; in the first state, the scraping member is in contact with the material receiving surface; in the second state, the scraping member is separated from the material receiving surface; wherein, the scraping member maintains the first state during the movement from the low end to the high end of the material receiving surface, and maintains the second state during the movement from the high end to the low end of the material receiving surface.

6. The mother liquor carbonization treatment device according to claim 5, characterized in that, The driving mechanism includes one or more groups of closed-loop chains arranged in the furnace body and driven by a motor to rotate, and the chains are arranged above the material receiving surface and extend along the extension direction of the material receiving surface; the scraping member is fixed on the chains and is driven by the chains to reciprocate between the low end and the high end of the material receiving surface.

7. A mother liquor carbonization treatment device according to claim 5 or 6, characterized in that The scraping member is a scraping net or a scraping plate.

8. A mother liquor carbonization treatment device according to claim 1, characterized in that, A sandwich space is formed inside the peripheral wall of the heating furnace, and the heating furnace is heated by introducing steam into the sandwich space or an electric heating element is provided in the sandwich space for heating.

9. The mother liquor carbonization treatment device according to claim 8, characterized in that, The heating furnace includes an outer shell body with an inner shell body sleeved outside the outer shell body, and the inner shell body and the outer shell body are spaced apart to form the sandwich space.

10. The mother liquor carbonization treatment device according to claim 1, characterized in that, A slope plate is provided at the inner bottom of the heating furnace, and the slope plate constitutes the material receiving surface; or the inner side surface of the inner bottom wall of the heating furnace constitutes the material receiving surface.

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