Resource recycling treatment device for landfill leachate membrane concentrated solution

Abstract

The utility model discloses a landfill leachate membrane concentrated solution resource recycling treatment device which comprises a sodium chloride treatment device and a potassium chloride treatment device, the sodium chloride treatment device comprises a preheater, a degasser, a sodium chloride separator, a circulating heater, a steam compressor, a sodium chloride condensate water tank, a sodium chloride thickener, a sodium chloride dehydrator and a sodium chloride mother liquor tank; according to the resource recycling treatment device for the landfill leachate membrane concentrated solution, the landfill leachate membrane concentrated solution is treated through the sodium chloride treatment device to obtain sodium chloride solids, sodium chloride mother liquor is treated through the potassium chloride treatment device to obtain potassium chloride solids, the problem that carnallite components are complex is effectively solved, products can be recycled to obtain additional benefits, and the economic benefit is increased. The treatment cost is reduced; meanwhile, steam of the circulating heater can enter the heat exchange channel of the preheater for heat exchange, the preheating function is achieved, the energy consumption of the preheater is reduced, and the landfill leachate treatment cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of garbage leachate membrane concentrated liquid treatment systems, in particular to a garbage leachate membrane concentrated liquid resource recovery and treatment device. Background Art

[0002] In recent years, with the increase of urban population, the expansion of urban scale and the improvement of residents' living standards in China, the output of urban domestic garbage in my country has increased sharply, and the output of landfill leachate has also increased year by year. However, there are many pollution problems in landfill, among which the landfill leachate generated in the landfill process is the most typical secondary pollutant. The so-called landfill leachate refers to the pollutants contained in the garbage that will be dissolved with water due to compaction and biochemical action of microorganisms during the landfill process, and will form waste liquid with rainfall. Due to the complex composition of landfill leachate and the high content of organic matter and ammonia nitrogen, it is extremely difficult to treat and very harmful wastewater. It can cause serious pollution to groundwater, surface water and the environment around the landfill, causing the deterioration of surface water quality, the loss of groundwater use value, and a direct threat to drinking water, industrial and agricultural water sources and human health. Therefore, if the landfill leachate is not properly handled, it will cause serious pollution to the water and soil around the landfill. At present, membrane concentration technology is mostly used to treat landfill leachate, which results in the original leachate being converted into membrane concentrated liquid, which is more difficult to treat.

[0003] The evaporation process is one of the existing methods for treating landfill leachate membrane concentrate. Evaporation is a physical process that separates volatile and non-volatile components. It consists of two parts: heating the solution to boil and vaporize the water and continuously removing the vaporized water vapor. When the landfill leachate is evaporated, water boils out of the leachate and pollutants remain in the concentrate. All heavy metals and inorganic substances and most organic substances are less volatile than water, so they will remain in the concentrate. Only some pollutants such as volatile hydrocarbons, volatile organic acids and ammonia will enter the steam and eventually exist in the condensate after the steam condenses.

[0004] However, the defects and shortcomings of the existing evaporation devices for treating landfill leachate are: the treatment process consumes a lot of energy, the components of the treated impure salt products are complex and difficult to recycle, resulting in high landfill leachate treatment costs.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] The utility model provides a garbage leachate membrane concentrated liquid resource recovery and treatment device, which at least solves the technical problem of how to reduce the treatment cost of garbage leachate.

[0008] (II) Technical solution

[0009] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0010] A garbage leachate membrane concentrate recycling and processing device comprises: a sodium chloride processing device and a potassium chloride processing device, wherein the sodium chloride processing device comprises: a preheater, a degasser, a sodium chloride separator, a circulation heater, a steam compressor, a sodium chloride condensate tank, a sodium chloride thickener, a sodium chloride dehydrator and a sodium chloride mother liquid tank;

[0011] The preheater is provided with a water inlet channel and a heat exchange channel, and both the water inlet channel and the heat exchange channel have an inlet and an outlet;

[0012] The degasser is connected to the outlet of the water inlet channel;

[0013] The sodium chloride separator is provided with an inlet and an outlet, and the inlet is connected to the degasser;

[0014] The circulation heater is connected to the sodium chloride separator;

[0015] The steam compressor is used to receive the steam output by the sodium chloride separator, compress the steam and then transport it to the circulation heater;

[0016] The sodium chloride condensed water tank is provided with an inlet and an outlet, wherein the inlet is connected to the circulation heater, and the outlet is connected to the inlet of the heat exchange channel;

[0017] The sodium chloride thickener is provided with an inlet and an outlet, wherein the inlet is connected to the outlet of the sodium chloride separator, and the outlet is connected to the sodium chloride dehydrator;

[0018] The sodium chloride mother liquor tank is provided with an inlet and an outlet, wherein the inlet is used to receive the sodium chloride mother liquor outputted by the sodium chloride thickener and the sodium chloride dehydrator, and the outlet is used to transport the sodium chloride mother liquor to the circulation heater or the potassium chloride treatment device;

[0019] The potassium chloride processing device is used to convert the received sodium chloride mother liquor into potassium chloride solid.

[0020] In some embodiments, the circulation heater includes a sodium chloride heater and a sodium chloride forced circulation pump, the sodium chloride heater is connected to the sodium chloride separator through a circulation pipeline, the sodium chloride forced circulation pump is arranged on the circulation pipeline, the steam compressor is used to receive the steam output by the sodium chloride separator, compress the steam and then transport the steam to the sodium chloride heater; the outlet of the sodium chloride mother liquor tank is connected to the circulation pipeline downstream of the outlet of the sodium chloride forced circulation pump.

[0021] In some embodiments, the sodium chloride separator is connected to the sodium chloride thickener via a pipeline, and a sodium chloride slurry pump is provided on the pipeline; the outlet of the sodium chloride mother liquor tank transports the sodium chloride mother liquor to the circulation pipeline via the sodium chloride mother liquor pump.

[0022] In some embodiments, the sodium chloride treatment device includes a buffer water tank, which is connected to the inlet of the water inlet channel through a pipeline. A raw material pump is provided on the pipeline, and the raw material pump is used to transport the landfill leachate to be treated to the water inlet channel.

[0023] In some embodiments, the potassium chloride processing device includes a potassium chloride separator, a potassium chloride condenser, a potassium chloride circulating pump, a potassium chloride condensation water tank, a potassium chloride thickener, a potassium chloride dehydrator and a potassium chloride mother liquor tank; the potassium chloride separator is used to receive the sodium chloride mother liquor output by the sodium chloride mother liquor tank; the potassium chloride condenser is connected to the potassium chloride separator for condensing steam; the potassium chloride circulating pump is connected to the potassium chloride separator through a circulation pipeline; the potassium chloride condensation water tank is provided with an inlet and an outlet, the inlet of which is connected to the potassium chloride condenser, and the outlet of which is connected to the sodium chloride condensation water tank through a pipeline; the potassium chloride thickener is connected to the circulation pipeline of the potassium chloride separator through a pipeline; the potassium chloride dehydrator is connected to the potassium chloride thickener; the potassium chloride mother liquor tank is provided with an inlet and an outlet, the inlet of which is used to receive the potassium chloride mother liquor output by the potassium chloride thickener and the potassium chloride dehydrator, and the outlet of which is used to transport the potassium chloride mother liquor to the sodium chloride separator or the potassium chloride processing device.

[0024] In some embodiments, the potassium chloride separator, potassium chloride condenser and potassium chloride circulation pump are provided in two groups, the potassium chloride separator of the first group is connected to the sodium chloride mother liquor tank through a pipeline, the circulation pipeline of the first group is connected to the potassium chloride separator of the second group through a pipeline; the circulation pipeline of the second group is connected to the potassium chloride thickener through a pipeline.

[0025] In some embodiments, the potassium chloride processing device includes a potassium chloride brine pump, which is disposed on a pipeline between the second group of circulation pipelines and the potassium chloride thickener, and is used to pump potassium chloride brine into the potassium chloride thickener.

[0026] In some embodiments, the potassium chloride processing device includes a feed pump, which is arranged on the pipeline between the potassium chloride separator of the first group and the sodium chloride mother liquid tank, and on the pipeline between the circulation pipeline of the first group and the potassium chloride separator of the second group.

[0027] In some embodiments, the sodium chloride processing device and / or the potassium chloride processing device further comprises a drying device, wherein the drying device is used to dry the sodium chloride solid outputted by the sodium chloride dehydrator or the potassium chloride solid outputted by the potassium chloride dehydrator.

[0028] In some embodiments, the sodium chloride processing device and / or the potassium chloride processing device further comprises a packaging device, and the packaging device is used to package solid sodium chloride or solid potassium chloride.

[0029] (III) Beneficial effects

[0030] Compared with the prior art, the garbage leachate membrane concentrate resource recovery and treatment device provided by the utility model has the following beneficial effects:

[0031] (1) The waste leachate membrane concentrate resource recovery and treatment device processes the waste leachate membrane concentrate through a sodium chloride treatment device to obtain sodium chloride solid, and processes the sodium chloride mother liquor through a potassium chloride treatment device to obtain potassium chloride solid. The obtained sodium chloride and potassium chloride solids can be recycled to obtain additional benefits, which effectively solves the problem of complex salt components and reduces treatment costs.

[0032] (2) The steam from the circulation heater can enter the heat exchange channel of the preheater after passing through the sodium chloride condensate tank, and exchange heat with the landfill leachate membrane concentrate in the water inlet channel to achieve the preheating function, reduce the energy consumption of the preheater, and help reduce the processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a three-dimensional diagram of the resource recovery and processing device for the landfill leachate membrane concentrate in the embodiment.

[0034] Figure 2 It is a top view of the resource recovery and processing device for the landfill leachate membrane concentrate in the embodiment.

[0035] Reference numerals:

[0036] Sodium chloride processing device 1, buffer water tank 10, preheater 11, deaerator 12, sodium chloride separator 13, circulation heater 14, steam compressor 15, sodium chloride condensate water tank 16, sodium chloride thickener 17, sodium chloride dehydrator 18, sodium chloride mother liquor tank 19, sodium chloride salt slurry pump 101, sodium chloride mother liquor pump 102, raw material pump 103, sodium chloride condensate water pump 104, water inlet channel 111, heat exchange channel 112, sodium chloride drying device 120, sodium chloride packaging device 130, sodium chloride heater 141, sodium chloride forced circulation pump 142;

[0037] Potassium chloride processing device 2, potassium chloride mother liquor tank 20, primary potassium chloride separator 21, primary potassium chloride condenser 22, primary potassium chloride circulation pump 23, secondary potassium chloride separator 24, secondary potassium chloride condenser 25, secondary potassium chloride circulation pump 26, potassium chloride condensate water tank 27, potassium chloride thickener 28, potassium chloride dehydrator 29, potassium chloride mother liquor pump 200, potassium chloride salt slurry pump 201, primary feed pump 202, secondary feed pump 203, potassium chloride condensate water pump 204, potassium chloride drying device 210, potassium chloride packaging device 220. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0039] The defects and shortcomings of the existing evaporation devices for treating landfill leachate are: the treatment process consumes a lot of energy, the components of the treated products are complex and difficult to recycle, resulting in high landfill leachate treatment costs.

[0040] In order to solve the above technical problems, this embodiment provides a garbage leachate membrane concentrate recycling and processing device, please refer to Figure 1 and Figure 2 As shown, Figure 1 It is a three-dimensional diagram of the waste leachate membrane concentrate resource recovery and treatment device in the embodiment, Figure 2 It is a top view of the resource recovery and processing device for the landfill leachate membrane concentrate in the embodiment.

[0041] The garbage leachate membrane concentrate resource recovery and treatment device of this embodiment includes: a sodium chloride treatment device 1 and a potassium chloride treatment device 2, wherein the sodium chloride treatment device 1 includes: a preheater 11, a degasser 12, a sodium chloride separator 13, a circulation heater 14, a steam compressor 15, a sodium chloride condensate tank 16, a sodium chloride thickener 17, a sodium chloride dehydrator 18 and a sodium chloride mother liquid tank 19;

[0042] The preheater 11 is provided with a water inlet channel 111 and a heat exchange channel 112, and both the water inlet channel 111 and the heat exchange channel 112 have an inlet and an outlet; the degasser 12 is connected to the outlet of the water inlet channel 111; the sodium chloride separator 13 is provided with an inlet and an outlet, and its inlet is connected to the degasser 12; the circulation heater 14 is connected to the sodium chloride separator 13; the steam compressor 15 is used to receive the steam output by the sodium chloride separator 13, compress the steam and transport it to the circulation heater 14, and the raw steam can be connected to the transport pipeline; the sodium chloride condensate tank 16 is provided with an inlet and an outlet, and its inlet is connected to the circulation heater 14 , its outlet is connected to the inlet of the heat exchange channel 112 through a pipeline, and a sodium chloride condensate pump 104 for transportation is provided on the pipeline; the sodium chloride thickener 17 is provided with an inlet and an outlet, its inlet is connected to the outlet of the sodium chloride separator 13, and its outlet is connected to the sodium chloride dehydrator 18; the sodium chloride mother liquor tank 19 is provided with an inlet and an outlet, its inlet is used to receive the sodium chloride mother liquor output by the sodium chloride thickener 17 and the sodium chloride dehydrator 18, and its outlet is used to transport the sodium chloride mother liquor to the circulation heater 14 or the potassium chloride processing device 2; the potassium chloride processing device 2 is used to convert the received sodium chloride mother liquor into potassium chloride solid.

[0043] When the landfill leachate membrane concentrate resource recovery and treatment device of the above technical solution is working, first, the landfill leachate membrane concentrate enters the preheater 11 through the water inlet channel 111, and in the preheater 11, the concentrate exchanges heat with the condensed water passing through the heat exchange channel 112, thereby preliminarily raising the temperature of the concentrate and providing conditions for subsequent treatment steps; the preheated concentrate then enters the degasser 12, and in the degasser 12, the gas components in the concentrate are effectively removed to reduce the interference of the gas on the subsequent treatment steps; then, the degassed concentrate is sent to the sodium chloride separator 13, and in the sodium chloride separator 13, the concentrate undergoes a separation process, so that the sodium chloride component therein is separated and concentrated; the concentrate in the separation process is heated in the circulation heater to raise its temperature, which is beneficial to the continuous separation process of sodium chloride; the circulation heater The steam from the preheater is sent to the sodium chloride condensate tank 16, where it is partially condensed. The condensed water and steam in the condensate tank are sent back to the heat exchange channel 112 of the preheater 11 through the outlet to preheat the concentrated liquid in the water inlet channel 111, thereby realizing the recycling of heat energy; the liquid from which the sodium chloride component is separated and concentrated enters the sodium chloride thickener 17, where the sodium chloride solution is further concentrated to form a relatively thick salt slurry; the thick salt slurry is then sent to the sodium chloride dehydrator 18, where excess water in the salt slurry is removed by centrifugation or other dehydration methods to obtain a relatively dry sodium chloride solid; finally, the sodium chloride mother liquor (containing the remaining uncrystallized sodium chloride and other components) output by the sodium chloride thickener 17 and the sodium chloride dehydrator 18 is collected in the sodium chloride mother liquor tank 19. The sodium chloride mother liquor tank 19 is provided with an outlet, which can transport the sodium chloride mother liquor back to the circulation heater 14 for circulation treatment to further extract the sodium chloride therein; or, when the sodium chloride treatment reaches a certain degree, the sodium chloride mother liquor can also be transported to the potassium chloride processing device 2 for the subsequent potassium chloride production process. The potassium chloride processing device 2 receives the mother liquor from the sodium chloride mother liquor tank 19, and after a specific treatment step, extracts the potassium chloride component in the mother liquor and produces potassium chloride solid.

[0044] It can be seen that the landfill leachate membrane concentrate resource recovery and treatment device of the above technical solution processes the landfill leachate membrane concentrate to obtain sodium chloride solid through the sodium chloride treatment device 1, and processes the sodium chloride mother liquor to obtain potassium chloride solid through the potassium chloride treatment device 2, which effectively solves the problem of complex salt components, so that the prepared sodium chloride and potassium chloride solids can be recycled to obtain additional benefits and reduce processing costs. At the same time, the steam of the circulation heater 14 can enter the heat exchange channel 112 of the preheater 11 after passing through the sodium chloride condensation water tank 16, and exchange heat with the landfill leachate membrane concentrate in the water inlet channel 111, realize the preheating function, reduce the energy consumption of the preheater 11, and help reduce the processing cost. At the same time, the landfill leachate membrane concentrate is evaporated and crystallized for salt separation. When the hazardous waste is landfilled, the actual output is converted from a large volume of liquid mother liquor to a smaller volume of solid salt due to the further removal of a large amount of water by evaporation and crystallization. The disposal cost is significantly reduced. Last but not least, the device only uses one compressor, which has low power consumption and is conducive to reducing operating costs.

[0045] In one embodiment of the above-mentioned circulation heater 14, the circulation heater 14 includes a sodium chloride heater 141 and a sodium chloride forced circulation pump 142; the sodium chloride heater 141 is connected to the sodium chloride separator 13 through a circulation pipeline, and the circulation pipeline is divided into an upstream circulation pipeline connected between the front end of the sodium chloride heater 141 and the sodium chloride separator 13, and a downstream circulation pipeline connected between the rear end of the sodium chloride heater 141 and the sodium chloride separator 13, and the downstream circulation pipeline is provided with a sodium chloride forced circulation pump 142; the steam compressor 15 receives the steam output by the sodium chloride separator 13, compresses the steam and transports it to the sodium chloride heater 141; the outlet of the sodium chloride mother liquid tank 19 is connected to the circulation pipeline downstream of the sodium chloride forced circulation pump 142. When the circulation heater 14 is working, first, the sodium chloride heater 141 heats the concentrated liquid; then, the sodium chloride forced circulation pump 142 is responsible for transporting the concentrated liquid from the sodium chloride separator 13 to the sodium chloride heater 141, and returning it to the sodium chloride separator 13 after heating, forming a circulating flow; finally, the steam compressor 15 compresses the steam generated during the heating process of the concentrated liquid, and the compressed steam can be used for the heating process of the sodium chloride heater 141, so as to realize the recovery and recycling of heat energy. Among them, the secondary steam obtained after the feed liquid enters the separation chamber of the sodium chloride separator 13 and flashes rises inside the separation chamber. After the secondary steam is compressed by the steam compressor 15, the pressure and temperature are increased, and then enters the water inlet preheater 11 to exchange heat with the feed liquid. While heating the feed liquid, the secondary steam is condensed by the feed liquid and becomes condensed water for discharge. Among them, the entrained droplets are reduced during the rising process of the secondary steam, which can reduce the damage caused by the material to the steam compressor 15, and at the same time improve the water quality of the condensed water formed by the sodium chloride condensation water tank 16.

[0046] Exemplarily, the sodium chloride forced circulation pump 142 adopts frequency conversion control, and automatically adjusts the pump speed according to the pressure and flow in the circulation pipeline to ensure the stability of the circulation; the steam compressor 15 adopts multi-stage compression technology to improve the compression efficiency of steam, and transports the compressed steam to the sodium chloride heater 141 through a pipeline to achieve effective use of heat.

[0047] Exemplarily, the sodium chloride separator 13 is connected to the sodium chloride thickener 17 by a pipeline, and a sodium chloride slurry pump 101 is provided on the pipeline, and the outlet of the sodium chloride mother liquor tank 19 transports the sodium chloride mother liquor to the circulation pipeline through the sodium chloride mother liquor pump 102. In this arrangement, the sodium chloride slurry pump 101, the sodium chloride mother liquor pump 102 and the sodium chloride forced circulation pump 142 work simultaneously, so that the circulation of the concentrated liquid and the circulation operation of the sodium chloride processing device 1 can be realized.

[0048] In some embodiments, the sodium chloride treatment device 1 further includes a buffer water tank 10 , which is connected to the inlet of the water inlet channel 111 through a pipeline, and a raw material pump 103 is provided on the pipeline for stably conveying the leachate to be treated to the water inlet channel 111 .

[0049] Exemplarily, the buffer water tank 10 is provided with a liquid level sensor and a temperature sensor to monitor the liquid level and temperature in the water tank in real time, and is linked with the raw material pump 103 through a control system. When the liquid level is lower than the set value, the raw material pump 103 automatically starts to transport the leachate to be treated from the outside to the water inlet channel 111; when the temperature exceeds the set range, the control system activates the alarm mechanism to prevent high temperature from causing damage to the equipment.

[0050] In one embodiment of the above-mentioned potassium chloride processing device 2, the potassium chloride processing device 2 includes a potassium chloride separator, a potassium chloride condenser and a potassium chloride circulating pump. Exemplarily, the potassium chloride separator, the potassium chloride condenser and the potassium chloride circulating pump are provided with two groups, namely a primary potassium chloride separator 21, a primary potassium chloride condenser 22, a primary potassium chloride circulating pump 23, and a secondary potassium chloride separator 24, a secondary potassium chloride condenser 25 and a secondary potassium chloride circulating pump 26. The potassium chloride processing device 2 also includes a potassium chloride condensate water tank 27, a potassium chloride thickener 28, a potassium chloride dehydrator 29 and a potassium chloride mother liquor tank 20; the primary potassium chloride separator 21 is connected to the sodium chloride mother liquor tank 19 through a pipeline for receiving the sodium chloride mother liquor output by the sodium chloride mother liquor tank 19; the potassium chloride condenser is connected to the potassium chloride separator for condensing steam; the potassium chloride circulating pump is connected to The potassium chloride separator is connected through a circulation pipeline; the circulation pipeline of the first group is connected to the secondary potassium chloride separator 24 through a pipeline; the potassium chloride condensed water tank 27 is provided with an inlet and an outlet, the inlet of which is connected to the primary potassium chloride condenser 22 and the secondary potassium chloride condenser 25 for collecting condensed water, and the outlet of which is connected to the sodium chloride condensed water tank 16 through a pipeline, and a potassium chloride condensed water pump 204 is provided on the pipeline; the potassium chloride thickener 28 is connected to the circulation pipeline of the secondary potassium chloride separator 24 through a pipeline; the potassium chloride dehydrator 29 is connected to the potassium chloride thickener 28; the potassium chloride mother liquor tank 20 is provided with an inlet and an outlet, the inlet of which is used to receive the potassium chloride mother liquor output by the potassium chloride thickener 28 and the potassium chloride dehydrator 29, and the outlet of which transports the potassium chloride mother liquor to the sodium chloride sodium chloride separator 13 or the potassium chloride treatment device 2 through the potassium chloride mother liquor pump 200.

[0051] Exemplarily, the potassium chloride processing device 2 includes a potassium chloride slurry pump 201, which is arranged on the pipeline between the circulation pipeline of the second group and the potassium chloride thickener 28, and is used to pump potassium chloride slurry into the potassium chloride thickener 28. Because the concentration of potassium chloride slurry is relatively high, crystallization and pipe clogging are prone to occur, so the inlet of the potassium chloride slurry pump 201 is connected to the outlet of the circulation pump, and the circulation flow rate is large, so that the mother liquor always remains in a circulation state, even if the crystals remain in a suspended circulation state in the mother liquor, pipe clogging will not occur.

[0052] Exemplarily, the potassium chloride processing device 2 includes a feed pump, which includes a primary feed pump 202 arranged on a pipeline between the potassium chloride separator of the first group and the sodium chloride mother liquid tank 19, and a secondary feed pump 203 arranged on a pipeline between the circulation pipeline of the first group and the secondary potassium chloride separator 24.

[0053] The potassium chloride treatment device 2 of the above technical solution makes the potassium chloride component in the sodium chloride mother liquor precipitate in the form of crystals. When the potassium chloride treatment device 2 is working, the sodium chloride mother liquor passes through the primary feed pump 202, the primary potassium chloride separator 21, the primary potassium chloride forced circulation pump 23, the secondary feed pump 203, the secondary potassium chloride separator 24, the secondary potassium chloride forced circulation pump 25, the potassium chloride salt slurry pump 201, the potassium chloride thickener 28, the potassium chloride dehydrator 29, and the potassium chloride mother liquor tank 20 in sequence. The specific process is as follows: First, the sodium chloride mother liquor in the sodium chloride mother liquor tank 19 is fed into the primary potassium chloride separator 21 by the primary feed pump 202, and the primary potassium chloride separator 24 is fed into the primary potassium chloride separator 25. The feed liquid in the separator 21 is circulated by a primary potassium chloride forced circulation pump 23, and the primary potassium chloride separator 21 performs preliminary separation on the sodium chloride component in the sodium chloride mother liquor. After separation, the feed liquid enters the secondary potassium chloride separator 24 through a secondary feed pump 203 for further separation, and is circulated by a secondary potassium chloride forced circulation pump 25 at the same time. The potassium chloride slurry obtained after the secondary separation is sent to a potassium chloride thickener 28 by a potassium chloride slurry pump 201. Exemplarily, the potassium chloride thickener 28 uses the principle of gravity sedimentation to increase the consistency of the potassium chloride slurry, and then further removes the moisture in the potassium chloride by a potassium chloride dehydrator 29 to obtain potassium chloride solid. Wherein, the potassium chloride condensate water formation process is as follows: the steam formed by the potassium chloride separator enters the potassium chloride condenser and the potassium chloride condensate water tank 27 for condensation, and the condensed water obtained by condensation is sent to the sodium chloride condensate water tank 16 by a potassium chloride condensate water pump for cyclic treatment.

[0054] Exemplarily, when the potassium chloride separator has a good effect of separating the potassium chloride component in the sodium chloride mother liquor, only one group of the potassium chloride separator, the potassium chloride condenser and the potassium chloride circulation pump is provided.

[0055] In order to further remove moisture from sodium chloride solid and potassium chloride solid, in some embodiments, the sodium chloride processing device 1 also includes a sodium chloride drying device 120, and the potassium chloride processing device 2 also includes a potassium chloride drying device 210. The sodium chloride drying device 120 is used to dry the sodium chloride solid output by the sodium chloride dehydrator 18, and the potassium chloride drying device 210 is used to dry the potassium chloride solid output by the potassium chloride dehydrator 29. In actual use, the staff can confirm whether to use the drying device according to the water content of the potassium chloride.

[0056] Exemplarily, the drying device includes a drying chamber, in which hot air is used to quickly evaporate the moisture in the sodium chloride or potassium chloride solid; a temperature control system and a humidity control system are provided in the drying chamber to ensure the stability of temperature and humidity during the drying process.

[0057] In order to package the sodium chloride solid and the potassium chloride solid, the sodium chloride processing device 1 further includes a sodium chloride packaging device 130 , and the potassium chloride processing device 2 further includes a potassium chloride packaging device 220 .

[0058] Exemplarily, the sodium chloride packaging device 130 and the potassium chloride packaging device 220 are automatic packaging machines, which can automatically complete the measurement, bagging and sealing of sodium chloride or potassium chloride solids according to the set packaging weight; the packaging machine is equipped with a metal detector and a weight verification device to ensure the quality and safety of each bag of product; the packaged products are automatically transported to the storage area or shipping area via a conveyor belt.

[0059] Exemplarily, the sodium chloride separator 13 and the potassium chloride separator are vertical conical bottom separators manufactured by Changzhou Leyan, Hubei Sanfeng, Shangshang Shengde, Xiangyuan or Quanzhou Zhongtian.

[0060] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A garbage leachate membrane concentrate recycling and processing device, characterized in that: include: A sodium chloride processing device and a potassium chloride processing device, wherein the sodium chloride processing device comprises: a preheater, a degasser, a sodium chloride separator, a circulation heater, a steam compressor, a sodium chloride condensate tank, a sodium chloride thickener, a sodium chloride dehydrator and a sodium chloride mother liquid tank; The preheater is provided with a water inlet channel and a heat exchange channel, and the inlet of the water inlet channel is used to input the landfill leachate membrane concentrate; The degasser is connected to the outlet of the water inlet channel; The inlet of the sodium chloride separator is connected to the degasser; The steam compressor is used to receive the steam output by the sodium chloride separator, compress the steam and then transport it to the circulation heater; The steam compressor is connected to the sodium chloride separator. The inlet of the sodium chloride condensed water tank is connected to the circulation heater, and the outlet thereof is connected to the inlet of the heat exchange channel; The inlet of the sodium chloride thickener is connected to the outlet of the sodium chloride separator, and the outlet is connected to the sodium chloride dehydrator; The inlet of the sodium chloride mother liquor tank is used to receive the sodium chloride mother liquor output by the sodium chloride thickener and the sodium chloride dehydrator, and the outlet is used to transport the sodium chloride mother liquor to the circulation heater or the potassium chloride treatment device; The potassium chloride processing device is used to convert the received sodium chloride mother liquor into potassium chloride solid.

2. The garbage leachate membrane concentrate resource recovery and treatment device according to claim 1, characterized in that: The circulation heater comprises a sodium chloride heater and a sodium chloride forced circulation pump, the sodium chloride heater is connected to the sodium chloride separator through a circulation pipeline, and the sodium chloride forced circulation pump is arranged on the circulation pipeline; The steam compressor is used to receive the steam output by the sodium chloride separator, compress the steam and then transport the steam to the sodium chloride heater; the outlet of the sodium chloride mother liquid tank is connected to the circulation pipeline downstream of the outlet of the sodium chloride forced circulation pump.

3. The garbage leachate membrane concentrate resource recovery and treatment device according to claim 1, characterized in that: The sodium chloride separator is connected to the sodium chloride thickener through a pipeline, and a sodium chloride slurry pump is arranged on the pipeline; the outlet of the sodium chloride mother liquor tank conveys the sodium chloride mother liquor to the circulation pipeline through the sodium chloride mother liquor pump.

4. The garbage leachate membrane concentrate resource recovery and treatment device according to claim 1, characterized in that: The sodium chloride treatment device comprises a buffer water tank, which is connected to the inlet of the water inlet channel through a pipeline. A raw material pump is provided on the pipeline, and the raw material pump is used to transport the landfill leachate to be treated to the water inlet channel.

5. The garbage leachate membrane concentrate resource recovery and treatment device according to claim 1, characterized in that: The potassium chloride processing device comprises a potassium chloride separator, a potassium chloride condenser, a potassium chloride circulation pump, a potassium chloride condensate tank, a potassium chloride thickener, a potassium chloride dehydrator and a potassium chloride mother liquid tank; The potassium chloride separator is used to receive the sodium chloride mother liquor output by the sodium chloride mother liquor tank; The potassium chloride condenser is connected to the potassium chloride separator and is used to condense steam; The potassium chloride circulation pump is connected to the potassium chloride separator via a circulation pipeline; The potassium chloride condensed water tank is provided with an inlet and an outlet, wherein the inlet is connected to the potassium chloride condenser, and the outlet is connected to the sodium chloride condensed water tank through a pipeline; The potassium chloride thickener is connected to the circulation pipeline of the potassium chloride separator through a pipeline; The potassium chloride dehydrator is connected to the potassium chloride thickener; The potassium chloride mother liquor tank is provided with an inlet and an outlet, wherein the inlet is used to receive the potassium chloride mother liquor outputted by the potassium chloride thickener and the potassium chloride dehydrator, and the outlet is used to transport the potassium chloride mother liquor to the sodium chloride separator or the potassium chloride treatment device.

6. The garbage leachate membrane concentrate resource recovery and treatment device according to claim 5, characterized in that: The potassium chloride separator, potassium chloride condenser and potassium chloride circulation pump are provided with two groups, the potassium chloride separator of the first group is connected with the sodium chloride mother liquid tank through a pipeline, the circulation pipeline of the first group is connected with the potassium chloride separator of the second group through a pipeline; the circulation pipeline of the second group is connected with the potassium chloride thickener through a pipeline.

7. The garbage leachate membrane concentrate resource recovery and treatment device according to claim 6, characterized in that: The potassium chloride processing device comprises a potassium chloride slurry pump, which is arranged on a pipeline between the second group of circulation pipelines and the potassium chloride thickener, and is used for pumping potassium chloride slurry into the potassium chloride thickener.

8. The garbage leachate membrane concentrate resource recovery and treatment device according to claim 6, characterized in that: The potassium chloride processing device comprises a feed pump, which is arranged on a pipeline between the potassium chloride separator of the first group and the sodium chloride mother liquid tank, and on a pipeline between the circulation pipeline of the first group and the potassium chloride separator of the second group.

9. The garbage leachate membrane concentrate resource recovery and treatment device according to claim 5, characterized in that: The sodium chloride processing device and / or potassium chloride processing device further comprises a drying device, and the drying device is used for drying the sodium chloride solid outputted by the sodium chloride dehydrator or the potassium chloride solid outputted by the potassium chloride dehydrator.

10. The garbage leachate membrane concentrate resource recovery and treatment device according to claim 5, characterized in that: The sodium chloride processing device and / or potassium chloride processing device further comprises a packaging device, and the packaging device is used for packaging sodium chloride solid or potassium chloride solid.

Images